Fiat 1 Users Manual
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Fiat Uno Service and Repair Manual Peter G Strasman (923-320-3Y7) Models covered Fiat Uno 45, 55, 60, 70, 1.1 and 1.4, including Turbo ie and special/limited editions 903 cc, 999 cc, 1108 cc, 1116 cc, 1299 cc, 1301 cc and 1372 cc petrol engines with manual transmissions Does not Selecta, Fiorino type vans or Diesel engine © Haynes Publishing 1996 A book in the Haynes Service and Repair Manual Series ABCDE FGHIJ KLMNO PQRST 123 All rights reserved. No part of this book may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, recording or by any information storage or retrieval system, without permission in writing from the copyright holder. Printed by J H Haynes & Co. Ltd, Sparkford, Nr Yeovil, Somerset BA22 7JJ Haynes Publishing Sparkford, Nr Yeovil, Somerset BA22 7JJ, England Haynes North America, Inc 861 Lawrence Drive, Newbury Park, California 91320, USA ISBN 1 85960 089 1 Editions Haynes S.A. 147/149, rue Saint Honoré, 75001 Paris, France British Library Cataloguing in Publication Data A catalogue record for this book is available from the British Library. Haynes Publishing Nordiska AB Fyrisborgsgatan 5, 754 50 Uppsala, Sverige Contents LIVING WITH YOUR FIAT UNO Introduction Page 0•4 Safety First! Page 0•5 General dimensions, weights and capacities Page 0•6 Roadside Repairs Jump starting Page 0•7 Jacking, towing and wheel changing Page 0•8 Identifying leaks Page 0•9 Page 0•10 Recommended Lubricants and Fluids Page 0•13 Conversion factors Page 0•14 Routine Maintenance and Servicing Maintenance schedule (also see Chapter 13) Contents REPAIRS & OVERHAUL Engine and Associated Systems Engine (also see Chapter 13) Page 1•1 Cooling and heating systems (also see Chapter 13) Page 2•1 Fuel system (also see Chapter 13) Page 3•1 Ignition system (also see Chapter 13) Page 4•1 Clutch (also see Chapter 13) Page 5•1 Transmission (also see Chapter 13) Page 6•1 Driveshafts, hubs, roadwheels and tyres (also see Chapter 13) Page 7•1 Page 8•1 Page 9•1 Steering Page 10•1 Suspension (also see Chapter 13) Page 11•1 Page 12•1 Supplement: Revisions and information on later models Page 13•1 Wiring Diagrams Page 14•1 Transmission Brakes Braking system (also see Chapter 13) Electrical Electrical system (also see Chapter 13) Steering and suspension Bodywork Bodywork (also see Chapter 13) Additional information REFERENCE MOT Test Checks Page REF•1 Tools and Working Facilities Page REF•5 General Repair Procedures Page REF•8 Fault Finding Page REF•9 Buying Spare Parts & Vehicle Identification Numbers Page REF•12 Glossary of Technical Terms Page REF•13 Index Page REF•17 0•4 Introduction Introduction to the Fiat Uno The Fiat Uno is a well designed and constructed car having an excellent power-to-weight ratio. The car is very economical, but still offers good performance with excellent body interior space. Attractive features include the options available for four- or five-speeds or three- or five-door bodywork. All essential accessories, except a radio, are fitted as standard and a sunroof is optionally available. From the home mechanic’s point of view all repair and servicing operations are straightforward without the need for special tools. Spare parts are immediately available at moderate cost. Acknowledgements Fiat Uno 1301 cc Turbo ie Thanks are due to Champion Spark Plug who supplied the illustrations showing spark plug conditions. Certain other illustrations are the copyright of the Fiat Motor Company (UK) Limited and are used with their permission. Thanks are also due to Sykes-Pickavant Limited, who provided some of the workshop tools, and to all those people at Sparkford who helped in the production of this manual. We take great pride in the accuracy of information given in this manual, but vehicle manufacturers make alterations and design changes during the production run of a particular vehicle of which they do not inform us, No liability can be accepted by the authors or publishers for loss, damage or injury caused by any errors in, or omissions from, the information given. Fiat Uno 1372 cc 70 SX ie Safety First! Working on your car can be dangerous. This page shows just some of the potential risks and hazards, with the aim of creating a safety-conscious attitude. General hazards Scalding • Don’t remove the radiator or expansion tank cap while the engine is hot. • Engine oil, automatic transmission fluid or power steering fluid may also be dangerously hot if the engine has recently been running. Burning • Beware of burns from the exhaust system and from any part of the engine. Brake discs and drums can also be extremely hot immediately after use. Crushing • When working under or near a raised vehicle, always supplement the jack with axle stands, or use drive-on ramps. Never venture under a car which is only supported by a jack. • Take care if loosening or tightening hightorque nuts when the vehicle is on stands. Initial loosening and final tightening should be done with the wheels on the ground. • Mains voltage is also dangerous. Make sure that any mains-operated equipment is correctly earthed. Mains power points should be protected by a residual current device (RCD) circuit breaker. Fume or gas intoxication • Exhaust fumes are poisonous; they often contain carbon monoxide, which is rapidly fatal if inhaled. Never run the engine in a confined space such as a garage with the doors shut. • Fuel vapour is also poisonous, as are the vapours from some cleaning solvents and paint thinners. Poisonous or irritant substances • Avoid skin contact with battery acid and with any fuel, fluid or lubricant, especially antifreeze, brake hydraulic fluid and Diesel fuel. Don’t syphon them by mouth. If such a substance is swallowed or gets into the eyes, seek medical advice. • Prolonged contact with used engine oil can cause skin cancer. Wear gloves or use a barrier cream if necessary. Change out of oilsoaked clothes and do not keep oily rags in your pocket. • Air conditioning refrigerant forms a poisonous gas if exposed to a naked flame (including a cigarette). It can also cause skin burns on contact. Fire Asbestos • Fuel is highly flammable; fuel vapour is explosive. • Don’t let fuel spill onto a hot engine. • Do not smoke or allow naked lights (including pilot lights) anywhere near a vehicle being worked on. Also beware of creating sparks (electrically or by use of tools). • Fuel vapour is heavier than air, so don’t work on the fuel system with the vehicle over an inspection pit. • Another cause of fire is an electrical overload or short-circuit. Take care when repairing or modifying the vehicle wiring. • Keep a fire extinguisher handy, of a type suitable for use on fuel and electrical fires. • Asbestos dust can cause cancer if inhaled or swallowed. Asbestos may be found in gaskets and in brake and clutch linings. When dealing with such components it is safest to assume that they contain asbestos. Electric shock • Ignition HT voltage can be dangerous, especially to people with heart problems or a pacemaker. Don’t work on or near the ignition system with the engine running or the ignition switched on. 0•5 Special hazards Hydrofluoric acid • This extremely corrosive acid is formed when certain types of synthetic rubber, found in some O-rings, oil seals, fuel hoses etc, are exposed to temperatures above 4000C. The rubber changes into a charred or sticky substance containing the acid. Once formed, the acid remains dangerous for years. If it gets onto the skin, it may be necessary to amputate the limb concerned. • When dealing with a vehicle which has suffered a fire, or with components salvaged from such a vehicle, wear protective gloves and discard them after use. The battery • Batteries contain sulphuric acid, which attacks clothing, eyes and skin. Take care when topping-up or carrying the battery. • The hydrogen gas given off by the battery is highly explosive. Never cause a spark or allow a naked light nearby. Be careful when connecting and disconnecting battery chargers or jump leads. Air bags • Air bags can cause injury if they go off accidentally. Take care when removing the steering wheel and/or facia. Special storage instructions may apply. Diesel injection equipment • Diesel injection pumps supply fuel at very high pressure. Take care when working on the fuel injectors and fuel pipes. Warning: Never expose the hands, face or any other part of the body to injector spray; the fuel can penetrate the skin with potentially fatal results. Remember... A few tips DO DON’T • Do use eye protection when using power tools, and when working under the vehicle. • Don’t attempt to lift a heavy component which may be beyond your capability – get assistance. • Do wear gloves or use barrier cream to protect your hands when necessary. • Do get someone to check periodically that all is well when working alone on the vehicle. • Do keep loose clothing and long hair well out of the way of moving mechanical parts. • Do remove rings, wristwatch etc, before working on the vehicle – especially the electrical system. • Do ensure that any lifting or jacking equipment has a safe working load rating adequate for the job. • Don’t rush to finish a job, or take unverified short cuts. • Don’t use ill-fitting tools which may slip and cause injury. • Don’t leave tools or parts lying around where someone can trip over them. Mop up oil and fuel spills at once. • Don’t allow children or pets to play in or near a vehicle being worked on. 0•6 General dimensions, weights and capacities Dimensions Overall length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Overall width . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Height . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Wheelbase . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Front track . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Rear track . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3644 mm (143.6 in) 1555 mm (61.3 in) 1432 mm (56.4 in) 2362 mm (93.1 in) 1340 mm (52.8 in) 1300 mm (51.2 in) Weights (kerb) Uno 45: Three-door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Five-door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Uno 55: Three-door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Five-door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Uno 70: Three-door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Five-door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Uno SX: Three-door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Five-door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 700 kg (1543 lb) 710 kg (1566 lb) 730 kg (1610 lb) 740 kg (1632 lb) 740 kg (1632 lb) 750 kg (1654 lb) 770 kg (1698 lb) 780 kg (1720 lb) Capacities Fuel tank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42.0 litre (9.25 gal) Engine oil (with filter change): 903 cc engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.42 litre (6.0 pint) 1116 and 1301 cc engines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.10 Iitre (7.2 pint) Transmission . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.40 litre (4.2 pint) Steering box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140.0 cc Driveshaft CV joints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125.0 cc Cooling system: 903 cc engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.6 litre (8.1 pint) 1116 cc engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.0 litre (10.6 pint) 1301 cc engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.2 litre (10.9 pint) For information applicable to later models, see Supplement at end of manual Roadside Repairs Jump starting will get you out of trouble, but you must correct whatever made the battery go flat in the first place. There are three possibilities: The battery has been drained by repeated attempts to start, or by leaving the lights on. 1 The charging system is not working properly (alternator drivebelt slack or broken, alternator wiring fault or alternator itself faulty). 2 3 The battery itself is at fault (electrolyte low, or battery worn out). 1 Connect one end of the red jump lead to the positive (+) terminal of the flat battery 0•7 Jump starting Booster battery (jump) starting When jump-starting a car using a booster battery, observe the following precautions: 4 Make sure that the booster battery is the same voltage as the discharged one in the vehicle. 4 Before connecting the booster battery, make sure that the ignition is switched off. 4 If the battery is being jump-started from the battery in another vehicle, the two vehcles MUST NOT TOUCH each other. 4 Ensure that all electrical equipment (lights, heater, wipers, etc) is switched off. 2 Connect the other end of the red lead to the positive (+) terminal of the booster battery. + + – – 4 Make sure that the transmission is in neutral (or PARK, in the case of automatic transmission). 3 Connect one end of the black jump lead to the negative (-) terminal of the booster battery 4 Connect the other end of the black jump lead to a bolt or bracket on the engine block, well away from the battery, on the vehicle to be started. 5 Make sure that the jump leads will not come into contact with the fan, drivebelts or other moving parts of the engine. 6 Start the engine using the booster battery, then with the engine running at idle speed, disconnect the jump leads in the reverse order of connection. 0•8 Roadside Repairs Jacking, towing and wheel changing To avoid repetition, the procedure for raising the vehicle, in order to carry out work under it, is not included before each relevant operation described in this Manual. It is to be preferred, and it is certainly recommended, that the vehicle is positioned over an inspection pit or raised on a lift. Where these facilities are not available, use ramps or jack up the vehicle strictly in accordance with the following guide. Once the vehicle is raised, supplement the jack with axle stands. To raise the front end with a garage jack, locate the jack under the transmission lower mounting, just below and slightly to the rear of the transmission oil drain plug. Protect the mounting by placing a block of wood between the jack head and the mounting. To raise the rear of the car, the jack should be placed under the spare wheel housing as far to the rear as possible. Place a wooden bearer between the jack head and the housing. ignition key to MAR to retain the steering in the unlocked position. Jacking Towing The jack supplied with the car should only be used to change a wheel. Do not use this jack when overhaul or repair work is being carried out; employ a hydraulic or screw jack and supplement it with axle stands. Jacking points are located under the sills for use with the jack supplied. When being towed, use the left-hand front towing eye. When towing another vehicle, use the rear towing eye adjacent to the exhaust tailpipe. When being towed, remember that the brake pedal will require heavier pressure due to lack of servo assistance. Always turn the With the car on firm level ground, apply the handbrake fully. Remove the hub cap or wheel trim, if fitted. Release, but do not remove, the bolts. Chock the front and rear of the opposite roadwheel and then raise the car using the sill jack supplied with the car if it is being done at the roadside. Alternatively use a workshop jack supplemented with axle stands. Remove the wheel bolts, change the wheel and screw in the bolts finger tight. It is recommended that the bolt threads are smeared with multi-purpose grease. Lower the car, remove the jack and tighten the wheel bolts to the specified torque. Refit any wheel trim that was removed. Spare wheel and jack stowage Front tow hook Rear tow hook Wheel changing Roadside Repairs 0•9 Identifying leaks Puddles on the garage floor or drive, or obvious wetness under the bonnet or underneath the car, suggest a leak that needs investigating. It can sometimes be difficult to decide where the leak is coming from, especially if the engine bay is very dirty already. Leaking oil or fluid can also be blown rearwards by the passage of air under the car, giving a false impression of where the problem lies. Warning: Most automotive oils and fluids are poisonous. Wash them off skin, and change out of contaminated clothing, without delay. The smell of a fluid leaking from the car may provide a clue to what’s leaking. Some fluids are distinctively coloured. It may help to clean the car and to park it over some clean paper as an aid to locating the source of the leak. Remember that some leaks may only occur while the engine is running. Sump oil Oil from filter Gearbox oil Engine oil may leak from the drain plug... ...or from the base of the oil filter. Gearbox oil can leak from the seals at the inboard ends of the driveshafts. Antifreeze Brake fluid Power steering fluid Leaking antifreeze often leaves a crystalline deposit like this. A leak occurring at a wheel is almost certainly brake fluid. Power steering fluid may leak from the pipe connectors on the steering rack. 0•10 Routine maintenance Maintenance is essential for ensuring safety and desirable for the purpose of getting the best in terms of performance and economy from the car. Over the years the need for periodic lubrication has been greatly reduced if not totally eliminated. This has unfortunately tended to lead some owners to think that because no such action is required the items either no longer exist or will last forever. This is certainly not the case; it is essential to carry out regular visual examinations as comprehensively as possible in order to spot any possible defects at an early stage before they develop into major and expensive repairs. For information applicable to later models, see Supplement. Every 250 miles (400 km), weekly, or before a long journey m m m m m Check engine oil level Check brake reservoir fluid level Check tyre pressures Check operation of all lights and horn Top up washer fluid reservoirs, adding a screen wash, and check operation of washers and wipers m Check coolant level m Check battery electrolyte level Every 6000 miles (10 000 km) or six months, whichever comes first m Renew engine oil and filter (Chapter 1, Section 2) m Check drivebelt tension (Chapter 2, Section 8) m Check carburettor idle speed and mixture adjustments (Chapter 3) m Check contact points and dwell angle (mechanical breaker distributors) (Chapter 4, Section 3) m Check tyre tread wear (Chapter 7, Section 7) m Check disc pads for wear (Chapter 8, Section 3) Every 12 000 miles (20 000 km) or 12 months, whichever comes first m Check and adjust valve clearances (Chapter 1, Sections 5 and 26) m Renew air cleaner element (Chapter 3, Section 2) m Check exhaust system for corrosion (Chapter 3, Section 19) m Renew contact breaker points and adjust dwell angle (mechanical breaker distributors) (Chapter 4, Section 3) m Check and adjust ignition timing (Chapter 4, Section 4) m Renew spark plugs (Chapter 4, Section 11) m Check clutch adjustment (Chapter 5, Section 2) m Check transmission oil level (Chapter 6, Section 2) m Check driveshaft and steering rack gaiters for splits (Chapters 7 and 10) m Check rear brake shoe linings for wear (Chapter 8, Section 4) m Check handbrake travel (Chapter 8, Section 16) m Check headlamp beam alignment (Chapter 9, Section 17) m Check balljoints for wear (Chapter 10, Section 2) m Check front wheel alignment (Chapter 10, Section 8) m Check suspension bushes for wear (Chapter 11, Section 2) m Check seat belts for fraying (Chapter 12, Section 23) m Lubricate controls, hinges and locks Every 24 000 miles (40 000 km) or two years, whichever comes first m Renew coolant anti-freeze mixture (Chapter 2, Section 3) m Renew transmission oil (Chapter 6, Section 2) m Renew brake hydraulic fluid (Chapter 8, Section 12) m Check for underbody corrosion and clean out door and sill drain holes (Chapter 12, Section 2) Every 36 000 miles (60 000 km) or three years, whichever comes first m Renew the timing belt - 1116 and 1299/1301 cc (Chapter 1, Section 28) Routine maintenance 0•11 Engine compartment (air cleaner removed for clarity) on 55S model 1 2 3 4 Strut upper mounting Washer fluid reservoir Brake fluid reservoir Ignition coil 5 6 7 8 Throttle cable Carburettor Battery Timing belt cover 9 Distributor 10 Oil filler cap 11 Radiator electric cooling fan 12 13 14 15 Radiator Coolant expansion tank Front mounting Clutch operating cable 0•12 Routine maintenance View of front end from below on 55S model 1 2 3 4 5 6 7 8 9 10 11 12 13 View of rear end from below 1 2 3 4 5 6 7 8 9 10 Suspension trailing arm Fuel tank filler hose Rear axle beam Rear silencer Spring seat Expansion box Handbrake cable Fuel tank support strap Fuel tank Handbrake cable adjuster Tie-rod end Track control arm Lower mounting Gearchange control rods Exhaust pipe Driveshafts Transmission Sump drain plug Disc caliper Front mounting Horns Radiator Oil filter Lubricants and Fluids Component or system Lubricant type/specification 1 Engine Multigrade engine oil, viscosity SAE 15W/40, meeting API-SG or CCMC G2/G3 specification (or equivalent multigrade engine oil with viscosity rating suitable for ambient temperature in which vehicle is operated see owner’s handbook) 2 Transmission: 1372 cc Turbo ie model All other models FIAT ZC 80/S gear oil FIAT ZC 90 gear oil 3 Cooling system Ethylene glycol based antifreeze 4 Brake and clutch hydraulic system(s) Hydraulic fluid to DOT 3 or 4, or SAE J1703C 5 Driveshaft CV joints and steering rack Lithium based molybdenum disulphide General greasing Multi-purpose lithium based grease 0•13 0•14 Conversion Factors Length (distance) Inches (in) Feet (ft) Miles x 25.4 x 0.305 x 1.609 = Millimetres (mm) = Metres (m) = Kilometres (km) x 0.0394 = Inches (in) x 3.281 = Feet (ft) x 0.621 = Miles Volume (capacity) Cubic inches (cu in; in3) Imperial pints (Imp pt) Imperial quarts (Imp qt) Imperial quarts (Imp qt) US quarts (US qt) Imperial gallons (Imp gal) Imperial gallons (Imp gal) US gallons (US gal) x x x x x x x x 16.387 = 0.568 = 1.137 = 1.201 = 0.946 = 4.546 = 1.201 = 3.785 = Cubic centimetres (cc; cm3) Litres (l) Litres (l) US quarts (US qt) Litres (l) Litres (l) US gallons (US gal) Litres (l) x x x x x x x x 0.061 1.76 0.88 0.833 1.057 0.22 0.833 0.264 = = = = = = = = Cubic inches (cu in; in3) Imperial pints (Imp pt) Imperial quarts (Imp qt) Imperial quarts (Imp qt) US quarts (US qt) Imperial gallons (Imp gal) Imperial gallons (Imp gal) US gallons (US gal) Mass (weight) Ounces (oz) Pounds (lb) x 28.35 = Grams (g) x 0.454 = Kilograms (kg) x 0.035 = Ounces (oz) x 2.205 = Pounds (lb) x 0.278 = Newtons (N) x 4.448 = Newtons (N) x 0.1 = Kilograms-force (kgf; kg) x 3.6 = Ounces-force (ozf; oz) x 0.225 = Pounds-force (lbf; lb) x 9.81 = Newtons (N) x 0.070 = Kilograms-force per square centimetre (kgf/cm2; kg/cm2) x 0.068 = Atmospheres (atm) Force Ounces-force (ozf; oz) Pounds-force (lbf; lb) Newtons (N) Pressure Pounds-force per square inch (psi; lbf/in2; lb/in2) Pounds-force per square inch (psi; lbf/in2; lb/in2) Pounds-force per square inch (psi; lbf/in2; lb/in2) Pounds-force per square inch (psi; lbf/in2; lb/in2) Kilopascals (kPa) x 0.01 x 14.223 = Pounds-force per square inch (psi; lbf/in2; lb/in2) x 14.696 = Pounds-force per square inch (psi; lbf/in2; lb/in2) x 14.5 = Pounds-force per square inch (psi; lbf/in2; lb/in2) x 0.145 = Pounds-force per square inch (psi; lbf/in2; lb/in2) x 98.1 = Kilopascals (kPa) Millibar (mbar) Millibar (mbar) x x x 0.01 = Millibar (mbar) x 68.947 = Millibar (mbar) Millibar (mbar) Millibar (mbar) Millimetres of mercury (mmHg) Inches of water (inH2O) x x x x x 0.069 = Bars x 6.895 = Kilopascals (kPa) = Kilograms-force per square centimetre (kgf/cm2; kg/cm2) 100 = Pascals (Pa) 0.0145 = Pounds-force per square inch (psi; lbf/in2; lb/in2) 0.75 = Millimetres of mercury (mmHg) 0.401 = Inches of water (inH2O) 0.535 = Inches of water (inH2O) 0.036 = Pounds-force per square inch (psi; lbf/in2; lb/in2) x x x x 1.333 2.491 1.868 27.68 = = = = Millibar (mbar) Millibar (mbar) Millimetres of mercury (mmHg) Inches of water (inH2O) Torque (moment of force) Pounds-force inches (lbf in; lb in) Pounds-force inches (lbf in; lb in) Pounds-force inches (lbf in; lb in) Pounds-force feet (lbf ft; lb ft) Pounds-force feet (lbf ft; lb ft) Newton metres (Nm) x 1.152 = Kilograms-force centimetre (kgf cm; kg cm) x 0.113 = Newton metres (Nm) x 0.083 = Pounds-force feet (lbf ft; lb ft) x 0.138 = Kilograms-force metres (kgf m; kg m) x 1.356 = Newton metres (Nm) x 0.102 = Kilograms-force metres (kgf m; kg m) x 0.868 = Pounds-force inches (lbf in; lb in) x 8.85 = Pounds-force inches (lbf in; lb in) x 12 = Pounds-force inches (lbf in; lb in) x 7.233 = Pounds-force feet (lbf ft; lb ft) x 0.738 = Pounds-force feet (lbf ft; lb ft) x 9.804 = Newton metres (Nm) Power Horsepower (hp) x 745.7 = Watts (W) x 0.0013 = Horsepower (hp) Velocity (speed) Miles per hour (miles/hr; mph) x 1.609 = Kilometres per hour (km/hr; kph) x 0.621 = Miles per hour (miles/hr; mph) Fuel consumption* Miles per gallon (mpg) x 0.354 = Kilometres per litre (km/l) x 2.825 = Miles per gallon (mpg) Temperature Degrees Fahrenheit = (°C x 1.8) + 32 Degrees Celsius (Degrees Centigrade; °C) = (°F - 32) x 0.56 * It is common practice to convert from miles per gallon (mpg) to litres/100 kilometres (l/100km), where mpg x l/100 km = 282 1•1 Chapter 1 Engine For modifications, and information applicable to later models, see Supplement at end of manual Contents Part 1: General Crankcase ventilation system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Engine oil and filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Major operations possible without removing the engine from the car . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1 2 4 Part 2: 903 cc engine Cylinder head - dismantling and decarbonising . . . . . . . . . . . . . . . . 17 Cylinder head - removal and refitting . . . . . . . . . . . . . . . . . . . . . . . . 7 Engine - complete dismantling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Engine - complete reassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Engine - dismantling (general) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Engine - initial start-up after overhaul or major repair . . . . . . . . . . . . 24 Engine - method of removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Engine - reassembly (general) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Engine - refitting ancillary components . . . . . . . . . . . . . . . . . . . . . . . 21 Engine - removing ancillary components . . . . . . . . . . . . . . . . . . . . . 15 Engine mountings - renewal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Engine/transmission - reconnection . . . . . . . . . . . . . . . . . . . . . . . . . 22 Engine/transmission - refitting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Engine/transmission - removal and separation . . . . . . . . . . . . . . . . . 13 Examination and renovation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Fault finding - all engines . . . . . . . . . . . . . . . . . . . . See end of Chapter Oil pump - removal and refitting . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Pistons/connecting rods - removal and refitting . . . . . . . . . . . . . . . . 9 Sump pan - removal and refitting . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Timing chain and sprockets - removal and refitting . . . . . . . . . . . . . 6 Valve clearances - adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Part 3: 1116 cc and 1301 cc engines Camshaft and camshaft carrier - removal and refitting . . . . . . . . . . 27 Cylinder head - dismantling and decarbonising . . . . . . . . . . . . . . . . 39 Cylinder head - removal and refitting . . . . . . . . . . . . . . . . . . . . . . . . 29 Engine - complete dismantling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 Engine - complete reassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 Engine - dismantling (general) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 Engine - initial start-up after major overhaul . . . . . . . . . . . . . . . . . . . 45 Engine - method of removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 Engine - reassembly (general) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 Engine ancillary components - refitting . . . . . . . . . . . . . . . . . . . . . . . 43 Engine ancillary components - removal . . . . . . . . . . . . . . . . . . . . . . 37 Engine mountings - renewal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 Engine/transmission - reconnection and refitting . . . . . . . . . . . . . . . 44 Engine/transmission - removal and separation . . . . . . . . . . . . . . . . . 35 Examination and renovation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 Fault finding - all engines . . . . . . . . . . . . . . . . . . . . See end of Chapter Oil pump - removal and refitting . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 Pistons/connecting rods - removal and refitting . . . . . . . . . . . . . . . . 32 Sump pan - removal and refitting . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 Timing belt - renewal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 Valve clearances - adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 Valve clearances - checking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Degrees of difficulty Easy, suitable for novice with little experience 1 Fairly easy, suitable for beginner with some experience 2 Fairly difficult, suitable for competent DIY mechanic 3 Difficult, suitable for experienced DIY mechanic 4 Very difficult, suitable for expert DIY or professional Specifications 903 cc engine Type ................................................... Four cylinder in-line, liquid cooled, overhead valve. Transversely mounted with end-on transmission General Bore . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Stroke . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Displacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Compression ratio: 900 models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 900 ES models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Maximum power (DIN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Maximum torque (DIN): 900 models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 900 ES models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Compression pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Maximum pressure difference between cylinders . . . . . . . . . . . . . . . . . Firing order . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65.0 mm (2.56 in) 68.0 mm (2.68 in) 903 cc (55 cu in) 9.0 : 1 9.7 : 1 33.1 kW at 5600 rev/min (45 bhp) 68 Nm at 3000 rev/min (49 lbf ft) 69 Nm at 3000 rev/min (51 lbf ft) 9.3 to 10.35 bar (135 to 150 lbf/in2) 0.69 bar (10 lbf/in2) 1 - 3 - 4 - 2 (No. 1 at crankshaft pulley end) 5 1 1•2 Engine – general Cylinder block and crankcase Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Bore diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Diameter of camshaft bearing bores in crankcase timing gear end: Grade B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Grade C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Grade D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Grade E . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Centre . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Flywheel end . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Maximum cylinder bore taper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Maximum cylinder bore ovality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Cast-iron 65.000 to 65.050 mm (2.5591 to 2.5610 in) 50.505 to 50.515 mm (1.9882 to 1.9886 in) 50.515 to 50.525 mm (1.9886 to 1.9890 in) 50.705 to 50.715 mm (1.9960 to 1.9964 in) 50.715 to 50.725 mm (1.9964 to 1.9968 in) 46.420 to 46.450 mm (1.8275 to 1.8287 in) 35.921 to 35.951 mm (1.4142 to 1.4154 in) 0.015 mm (0.0006 in) 0.015 mm (0.0006 in) Pistons and piston rings Piston diameter: Grade A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Grade C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Grade E . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Oversizes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Piston clearance in cylinder bore . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Piston ring groove width: Top . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Second . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Bottom . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Piston ring thickness: Top . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Second . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Bottom . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Piston ring groove clearance: Top . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Second . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Bottom . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Piston ring end gap: Top . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Second . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Bottom . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Oversize piston rings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Gudgeon pin diameter: Grade 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Grade 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Grade 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Oversize . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64.940 to 64.950 mm (2.5566 to 2.5570 in) 64.960 to 64.970 mm (2.5574 to 2.5578 in) 64.980 to 64.990 mm (2.5582 to 2.5586 in) 0.2, 0.4, 0.6 mm (0.008, 0.016, 0.024 in) 0.050 to 0.070 mm (0.0020 to 0.0028 in) 1.785 to 1.805 mm (0.0703 to 0.0711 in) 2.015 to 2.035 mm (0.0793 to 0.0801 in) 3.975 to 3.977 mm (0.1566 to 0.1567 in) 1.728 to 1.740 mm (0.0680 to 0.0685 in) 1.978 to 1.990 mm (0.0779 to 0.0784 in) 3.925 to 3.937 mm (0.1545 to 0.1550 in) 0.045 to 0.077 mm (0.0018 to 0.0030 in) 0.025 to 0.057 mm (0.0010 to 0.0022 in) 0.020 to 0.052 mm (0.0008 to 0.0020 in) 0.25 to 0.45 mm (0.0098 to 0.0177 in) 0.20 to 0.35 mm (0.0078 to 0.0137 in) 0.20 to 0.45 mm (0.0078 to 0.0177 in) 0.2, 0.4, 0.6 mm (0.008, 0.016, 0.024 in) 19.970 to 19.974 mm (0.7862 to 0.7863 in) 19.974 to 19.978 mm (0.7863 to 0.7865 in) 19.978 to 19.982 mm (0.7865 to 0.7866 in) 0.2 mm (0.008 in) Crankshaft Journal diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Standard main bearing shell thickness . . . . . . . . . . . . . . . . . . . . . . . . . . Undersizes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Crankshaft endfloat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Crankpin diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Standard big-end shell bearing thickness . . . . . . . . . . . . . . . . . . . . . . . Undersizes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50.785 to 50.805 mm (1.9994 to 2.0002 in) 1.832 to 1.837 mm (0.0721 to 0.0723 in) 0.254, 0.508, 0.762,1.016 mm (0.010, 0.020. 0.030, 0.040 in) 0.06 to 0.26 mm (0.0024 to 0.0102 in) 39.985 to 40.005 mm (1.5741 to 1.5750 in) 1.807 to 1.813 mm (0.0712 to 0.0714 in) 0.254, 0.508, 0.762, 1.016 mm (0.010, 0.020, 0.030, 0.040 in) Camshaft Diameter of camshaft journals: Timing end . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Centre . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Flywheel end . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Bush reamed diameters: Timing gear end* . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Centre . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Flywheel end . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . *Supplied reamed to size Cam lift . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Outside diameter of cam follower . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Oversizes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Cam follower running clearance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37.975 to 38.000 mm (1.4951 to 1.4961 in) 43.348 to 43.373 mm (1.7079 to 1.7088 in) 30.975 to 31.000 mm (1.2194 to 1.2205 in) 38.025 to 38.050 mm (1.4971 to 1.4981 in) 43.404 to 43.424 mm (1.7088 to 1.7096 in) 31.026 to 31.046 mm (1.2215 to 1.2223 in) 5.1 mm (0.201 in) 13.982 to 14.000 mm (0.5505 to 0.5512 in) 0.05 to 0.010 mm (0.002 to 0.004 in) 0.010 to 0.046 mm (0.0004 to 0.0018 in) Engine – general 1•3 Cylinder head and valves Material (cylinder head) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Maximum distortion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Valve guide bore in head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Valve guide outside diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Valve guide oversizes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Inside diameter of valve guide (reamed) . . . . . . . . . . . . . . . . . . . . . . . . . Guide fit in head (interference) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Valve stem diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Maximum clearance (valve stem to guide) . . . . . . . . . . . . . . . . . . . . . . . Valve seat angle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Valve face angle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Valve head diameter: Inlet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Exhaust . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Contact band (valve to seat) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Valve clearance: Inlet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Exhaust . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . For timing check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Valve timing: Inlet valve: Opens . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Closes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Exhaust valve: Opens . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Closes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Light alloy 0.05 mm (0.002 in) 12.950 to 12.977 mm (0.5099 to 0.5109 in) 13.010 to 13.030 mm (0.5122 to 0.5130 in) 0.5, 0.10, 0.25 mm (0.002, 0.004, 0.010 in) 7.022 to 7.040 mm (0.2765 to 0.2772 in) 0.033 to 0.080 mm (0.0013 to 0.0032 in) 6.982 to 7.000 mm (0.2748 to 0.2756 in) 0.022 to 0.058 mm (0.0009 to 0.0023 in) 44º 55’ to 45º 05’ 45º 25’ to 45º 35’ 29.0 mm (1.1417 in) 26.0 mm (1.0236 in) 1.3 to 1.5 mm (0.0512 to 0.0591 in) 0.15 mm (0.006 in) 0.20 mm (0.008 in) 0.60 mm (0.024 in) 7º BTDC 36º ABDC 1 38º BBDC 5º ATDC Lubrication system Oil pump type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Tooth tip to body clearance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Gear endfloat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Oil pressure at normal operating temperature and average road/ engine speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Oil capacity (with filter change) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Oil type/specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Oil filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Gear, driven by shaft from camshaft 0.05 to 0.14 mm (0.0020 to 0.0055 in) 0.020 to 0.105 mm (0.0008 to 0.0041 in) 2.94 to 3.92 bar (42 to 57 lbf/ in2) 3.42 litre (6.0 pint) Multigrade engine oil, viscosity SAE 15W/40 Champion C101 Torque wrench settings Nm lbf ft Cylinder head bolts: Stage 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Stage 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Camshaft sprocket bolt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Main bearing cap bolts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Big-end bearing cap bolts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Crankshaft pulley nut . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Flywheel bolts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Rocker pedestal nuts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Engine mounting bracket bolts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Engine mounting centre nuts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Exhaust manifold nuts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Spark plugs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Temperature sender switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Driveshaft to hub nuts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Hub carrier to strut clamp bolts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Roadwheel bolts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Brake caliper mounting bolts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Tie-rod end balljoint nuts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Driveshaft inboard boot retainer bolts . . . . . . . . . . . . . . . . . . . . . . . . . . 30 59 49 69 41 98 44 39 25 49 20 25 49 272 49 86 53 34 9 22 43.5 36 51 30 72 32 29 18 36 15 18 36 200 36 63 39 25 7 1•4 Engine – general 1116 cc and 1301 cc engine Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Four cylinder in-line, liquid cooled single overhead camshaft. Transversely mounted with end-on transmission General 1116 cc 1301 cc 80.0 mm (3.15 in) 86.4 mm (3.40 in) 55.5 mm (2.19 in) 55.5 mm (2.19 in) 1116 cc (68.08 cu in) 1301 cc (79.36 cu in) 9.2 : 1 9.1 : 1 40.5 kW (55 bhp) at 5600 rev/min 50 kW (68 bhp) at 5700 rev/min 86.3 Nm (64 lbf ft) at 100 Nm (74 lbf ft) 2900 rev/min at 2900 rev/min 10.35 to 11.73 bar (150 to 170 lbf/in2) 0.96 bar (14 lbf/ in2) 1 - 3 - 4 - 2 (No. 1 at crankshaft pulley end) Bore . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Stroke . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Displacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Compression ratio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Maximum power (DIN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Maximum torque (DIN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Compression pressure (bore wear test) . . . . . . . . . . . . . . . . . . . . . . . . . Pressure difference between cylinders . . . . . . . . . . . . . . . . . . . . . . . . . . Firing order . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pistons and piston rings Piston diameter - 1116 cc: Grade A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Grade C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Grade E . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Piston diameter - 1301 cc: Grade A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Grade C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Grade E . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Oversizes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Piston clearance in cylinder bore: 1116 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1301 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Piston ring groove width - 1116 cc: Top . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Second . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Bottom . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Piston ring groove width - 1301 cc: Top . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Second . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Bottom . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Piston ring thickness: Top . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Second . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Bottom . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Oversizes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Piston ring groove clearance - 1116 cc: Top . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Second . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Bottom . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Piston ring groove clearance - 1301 cc: Top . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Second . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Bottom . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Piston ring end gap - 1116 cc: Top . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Second . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Bottom . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Piston ring end gap - 1301 cc: Top . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Second . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Bottom . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Gudgeon pin diameter - 1116 cc: Grade 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Grade 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Grade 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Gudgeon pin diameter - 1301 cc: Grade 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Grade 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Oversize . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79.940 to 79.950 mm (3.1496 to 3.1500 in) 79.960 to 79.970 mm (3.1504 to 3.1508 in) 79.980 to 79.990 mm (3.1512 to 3.1516 in) 86.320 to 86.330 mm (3.4010 to 3.4014 in) 86.340 to 86.350 mm (3.4018 to 3.4022 in) 86.360 to 86.370 mm (3.4025 to 3.4030 in) 0.2, 0.4, 0.6 mm (0.008, 0.016, 0.023 in) 0.050 to 0.070 mm (0.0020 to 0.0027 in) 0.070 to 0.090 mm (0.0027 to 0.0035 in) 1.535 to 1.555 mm (0.1442 to 0.1461 in) 2.015 to 2.035 mm (0.0794 to 0.0802 in) 3.957 to 3.977 mm (0.1559 to 0.1567 in) 1.535 to 1.555 mm (0.0605 to 0.0613 in) 2.030 to 2.050 mm (0.0800 to 0.0808 in) 3.967 to 3.987 mm (0.1563 to 0.1571 in) 1.478 to 1.490 mm (0.0582 to 0.0587 in) 1.978 to 1.990 mm (0.0779 to 0.0784 in) 3.925 to 3.937 mm (0.1546 to 0.1551 in) 0.2, 0.4, 0.6 mm (0.008, 0.016, 0.023 in) 0.045 to 0.077 mm (0.0018 to 0.0030 in) 0.025 to 0.057 mm (0.0010 to 0.0022 in) 0.020 to 0.052 mm (0.0008 to 0.0020 in) 0.045 to 0.077 mm (0.0018 to 0.0030 in) 0.040 to 0.072 mm (0.0016 to 0.0028 in) 0.030 to 0.062 mm (0.0012 to 0.0024 in) 0.30 to 0.45 mm (0.0012 to 0.0018 in) 0.20 to 0.35 mm (0.008 to 0.014 in) 0.20 to 0.35 mm (0.008 to 0.014 in) 0.30 to 0.45 mm (0.012 to 0.016 in) 0.30 to 0.50 mm (0.012 to 0.020 in) 0.25 to 0.40 mm (0.010 to 0.016 in) 21.970 to 21.974 mm (0.8656 to 0.8658 in) 21.974 to 21.978 mm (0.8658 to 0.8659 in) 21.978 to 21.982 mm (0.8659 to 0.8661in) 21.991 to 21.994 mm (0.8664 to 0.8666 in) 21.994 to 21.997 mm (0.8666 to 0.8667 in) 0.2 mm (0.008 in) Engine – general 1•5 Crankshaft Journal diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Standard main bearing shell thickness . . . . . . . . . . . . . . . . . . . . . . . . . . Undersizes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Crankshaft endfloat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Crankpin diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Standard big-end shell bearing thickness . . . . . . . . . . . . . . . . . . . . . . . Undersizes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50.785 to 50.805 mm (1.9994 to 2.0002 in) 1.825 to 1.831 mm (0.0719 to 0.0721 in) 0.254, 0.508, 0.762, 1.016 mm (0.010. 0.020, 0.030, 0.040 in) 0.06 to 0.26 mm (0.0024 to 0.0102 in) 45.498 to 45.518 mm (1.7926 to 1.7934 in) 1.531 to 1.538 mm (0.0603 to 0.0606 in) 0.254, 0.508, 0.762, 1.016 mm (0.010, 0.020, 0.030, 0.040 in) Camshaft Number of bearings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Diameter of camshaft journals: No. 1 (timing end) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No. 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No. 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No. 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No. 5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Cam lift . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Camshaft bearing diameters in carrier: No. 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No. 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No. 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No. 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No. 5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Outside diameter of cam follower . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Cam follower running clearance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 29.944 to 29.960 mm (1.1798 to 1.1804 in) 47.935 to 47.950 mm (1.8886 to 1.8892 in) 48.135 to 48.150 mm (1.8965 to 1.8971 in) 48.335 to 48.350 mm (1.9044 to 1.9050 in) 48.535 to 48.550 mm (1.9122 to 1.9129 in) 8.8 mm (0.3467 in) 29.990 to 30.014 mm (1.1816 to 1.1825 in) 47.980 to 48.005 mm (1.8904 to 1.8913 in) 48.180 to 48.205 mm (1.8982 to 1.8992 in) 48.380 to 48.405 mm (1.9062 to 1.9072 in) 48.580 to 48.605 mm (1.9141 to 1.9150 in) 36.975 to 36.995 mm (1.4568 to 1.4576 in) 0.005 to 0.050 mm (0.0002 to 0.0020 in) Lubrication system Oil pump type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Tooth tip to body clearance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Gear endfloat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Oil pressure at normal operating temperature and average road/ engine speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Oil capacity (with filter change) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Oil type/specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Oil filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Gear driven from auxiliary shaft 0.110 to 0.180 mm (0.0043 to 0.0071 in) 0.020 to 0.105 mm (0.0008 to 0.0041 in) 3.43 to 4.9 bar (50 to 71 lbf/in2) 4.05 litre (7.1 pint) Multigrade engine oil, viscosity SAE 15W/40 Champion C106 Cylinder head and valves Head material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Maximum distortion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Valve guide bore in head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Valve guide outside diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Valve guide oversizes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Inside diameter of valve guide (reamed) . . . . . . . . . . . . . . . . . . . . . . . . . Valve guide fit in cylinder head (interference) . . . . . . . . . . . . . . . . . . . . . Valve stem diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Maximum clearance (valve stem to guide) . . . . . . . . . . . . . . . . . . . . . . . Valve face angle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Valve seat angle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Valve head diameter: Inlet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Exhaust . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Contact band (valve to seat) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Valve clearance: Inlet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Exhaust . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . For timing check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Valve clearance adjusting shim thicknesses . . . . . . . . . . . . . . . . . . . . . Valve timing: Inlet valve: Opens . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Closes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Exhaust valve: Opens . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Closes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Light alloy 0.05 mm (0.002 in) 13.950 to 13.977 mm (0.5496 to 0.5507 in) 14.040 to 14.058 mm (0.5532 to 0.5539 in) 0.05, 0.10, 0.25 mm (0.002, 0.004, 0.010 in) 8.022 to 8.040 mm (0.3161 to 0.3168 in) 0.063 to 0.108 mm (0.0025 to 0.0043 in) 7.974 to 7.992 mm (0.3142 to 0.3149 in) 0.030 to 0.066 mm (0.0012 to 0.0026 in) 45º 25’ to 45º 35’ 44º 55’ to 45º 05’ 35.850 to 36.150 mm (1.4125 to 1.4243 in) 30.850 to 31.450 mm (1.2155 to 1.2391 in) 1.3 to 1.5 mm (0.0512 to 0.0591 in) 0.40 mm (0.0158 in) 0.50 mm (0.0197 in) 0.80 mm (0.0315 in) 3.25 to 4.70 mm (0.128 to 0.185 in), in increments of 0.05 mm (0.002 in) 7º BTDC 35º ABDC 37º BBDC 5º ATDC 1 1•6 Engine – general Auxiliary shaft Bearing internal diameter (reamed): No. 1 (timing belt end) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No. 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Shaft journal diameter: No. 1 (timing belt end) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No. 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35.664 to 35.684 mm (1.4052 to 1.4059 in) 32.000 to 32.020 mm (1.2608 to 1.2616 in) 35.593 to 35.618 mm (1.4024 to 1.4033 in) 31.940 to 31.960 mm (1.2584 to 1.2592 in) Cylinder block and crankcase Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Bore diameter: 1116 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1301 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Maximum cylinder bore taper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Maximum cylinder bore ovality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80.000 to 80.050 mm (3.152 to 3.154 in) 86.400 to 86.450 mm (3.404 to 3.406 in) 0.015 mm (0.0006 in) 0.015 mm (0.0006 in) Torque wrench settings Nm lbf ft Cylinder head bolts: Stage 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Stage 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Stage 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Stage 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Camshaft carrier to cylinder head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Main bearing cap bolts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Big-end cap nuts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Flywheel mounting bolts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Camshaft sprocket bolt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Belt tensioner bolt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Exhaust manifold nuts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Auxiliary shaft sprocket bolt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Flexible mounting bracket bolts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Flexible mounting centre nuts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Oil pressure switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Spark plugs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Roadwheel bolts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Driveshaft/hub nuts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Tie-rod end balljoint nuts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Brake caliper mounting bolts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Front strut lower clamp bolts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Driveshaft inboard boot retainer bolts . . . . . . . . . . . . . . . . . . . . . . . . . . Crankshaft pulley nut . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 40 Turn through 90º Turn through 90º 20 80 51 83 83 44 28 83 59 49 32 25 86 272 34 53 49 9 98 15 30 Turn through 90º Turn through 90º 15 59 38 61 61 32 21 61 44 36 24 18 63 200 25 39 36 7 7 Part 1: General 1 Description Cast-iron cartridge type oil filter. An oil pressure relief valve is incorporated in the oil pump. The engine oil is independent of the transmission lubricant. 1116 cc and 1301 cc 1 The Uno may be powered by one of three engines depending upon the particular model. 903 cc 2 This is of four cylinder overhead valve type with a light alloy cylinder head and a cast-iron block and crankcase. 3 A three bearing crankshaft is used and the chain-driven camshaft runs in three steel backed white metal bearings. 4 The light alloy pistons are fitted with two compression and one oil control ring. The gudgeon pin is an interference fit in the small end of the connecting rod. 5 Lubrication is provided by an oil pump within the sump pan and both the pump and the distributor are driven from a gear on the camshaft. Pressurised oil passes through a 6 These engines are of single overhead camshaft type, the camshaft being driven by a toothed belt. 7 The difference in engine capacity is achieved by increasing the cylinder bore on the 1301 cc engine. 8 The cylinder head is of light alloy while the cylinder block and crankcase are of cast-iron construction. 9 A five bearing crankshaft is used and the camshaft runs in a similar number of bearings, but as these are in-line bored directly in the camshaft carrier, no repair is possible. 10 The pistons are of light alloy with two compression and one oil control ring. The gudgeon pin is an interference fit in the small end of the connecting rod. 11 An auxiliary shaft, driven by the timing belt is used to drive the distributor, oil pump and fuel pump. 12 The oil pump is located within the sump pan and incorporates a pressure relief valve. 13 Pressurised oil passes through a cartridge type oil filter. 14 The crankshaft main bearings are supplied under pressure from drillings in the crankcase from the main oil gallery whilst the connecting rod big-end bearings are lubricated from the main bearings by oil forced through the crankshaft oilways. The camshaft bearings are fed from a drilling from the main oil gallery. The cams and tappets are lubricated by oil mist from outlets in the camshaft bearings. 15 The cylinder walls, pistons and gudgeon pins are lubricated by oil splashed up by the crankshaft webs. An oil pressure warning light is fitted to indicate when the pressure is too low. All engines 16 The engine is mounted transversely with the transmission at the front of the car. 17 The engine oil is independent of the transmission lubricant. Engine – general 1•7 1 Fig. 1.1 Longitudinal section of 903 cc engine (Sec 1) Fig. 1.2 Cross-section of 903 cc engine (Sec 1) Fig. 1.3 Longitudinal section of 1116 cc and 1301 cc engines (Sec 1) Fig. 1.4 Cross-section of 1116 cc and 1301 cc engines (Sec 1) 1•8 Engine – general 2.2 Withdrawing engine oil dipstick (1116 cc) 2 Engine oil and filter 2.3A Typical dipstick markings 1 1 The engine oil level should be checked at the weekly service (see “Routine Maintenance”). Preferably check the level cold, first thing in the morning or if the engine has been running, allow at least ten minutes to elapse after switching off to permit the oil to drain. 2 Withdraw the dipstick, wipe it clean on non-fluffy material, re-insert it and then withdraw it for the second time (photo). 3 The oil level should be between the MIN and MAX marks. If not, top up with specified oil to the MAX mark. Pour the oil slowly through the filler orifice on the rocker cover. To raise the oil level from MIN to MAX will require approximately 1.1 litre (2.0 pints) (photos). 4 At the intervals specified in “Routine Maintenance” the oil and filter should be renewed. 5 Have the engine at normal operating temperature, remove the oil filler cap. 6 Place a suitable container under the sump pan. Unscrew and remove the oil drain plug and allow the oil to drain (photo). 7 While the oil is draining, unscrew and discard the oil filter. To unscrew the filter, a filter or chain wrench will normally be required. If such a tool is not available, drive a long screwdriver through the oil tester casing and use it as a lever to unscrew the filter cartridge. 8 Smear the rubber sealing ring of the new oil filter with oil and screw into position using hand pressure only (photo). 9 Refit the drain plug and refill the engine with the correct quantity and grade of oil. 10 Start the engine. It will take two or three seconds for the oil warning lamp to go out. This is normal and is due to the time taken for the new filter to fill with oil. 11 Switch off, check for leaks and check the oil level, topping up if necessary. 2.3B Topping up engine oil (1116 cc) 3 Crankcase ventilation system 1 1 This system is designed to draw oil fumes and blow-by gas (which has passed the piston rings) from the crankcase and draw it into the intake manifold when it will then be burned during the normal combustion process. 2 Regularly check the security of the system hoses which run from the rocker cover or crankcase breather unit (photo). 3 Periodically, detach the hoses and clean them out with paraffin and a brush or rag pull through. 4 Evidence of sludge or emulsified oil within the hoses or inside the oil filler cap will indicate that the engine is running too cool particularly if the car is used mainly for short journeys where the engine never reaches full working temperature. 4 Major operations possible without removing engine from car 1 The following work can be carried out without the need to remove the engine from the car. 903 cc engine Valve clearances - checking and adjusting Timing chain and sprockets - removal and refitting 2.6 Engine sump drain plug 2.8 Screwing on the oil filter (903 cc) Fig. 1.5 Sectional view of oil filter. Bypass valve arrowed (Sec 2) 3.2 Crankcase vent hose (1116 cc) 903 cc engine 1•9 Cylinder head - removal and refitting Sump pan - removal and refitting Pistons/connecting rods - removal and refitting Oil pump - removal and refitting Engine mountings - renewal 1116 cc and 1301 cc engines Valve clearances - checking and adjusting Camshaft and camshaft carrier - removal and refitting Timing belt - removal and refitting Cylinder head - removal and refitting Sump pan - removal and refitting Oil pump - removal and refitting Pistons/connecting rods - removal and refitting Engine mountings - renewal Part 2: 903 cc engine 5 Valve clearances adjustment 6 Timing chain and sprockets - removal and refitting 2 1 Adjust the valves when the engine is cold. 2 Unbolt and remove the rocker cover. 3 It is important that the clearance is set when the cam follower of the valve being adjusted is on the heel of the cam (ie; opposite the peak). This can be done by carrying out the adjustments in the following order, which also avoids turning the crankshaft more than necessary. 4 Turn the crankshaft either using a spanner on the pulley nut or by raising a front roadwheel, engaging a gear (3rd or 4th) and turning the wheel in the forward direction of travel. It will be easier to turn the engine if the spark plugs are first removed. Valve fully open Check and adjust Valve No. 8 EX Valve No. 1 EX Valve No. 6 IN Valve No. 3 IN Valve No. 4 EX Valve No. 5 EX Valve No. 7 IN Valve No. 2 IN Valve No. 1 EX Valve No. 8 EX Valve No. 3 IN Valve No. 6 IN Valve No. 5 EX Valve No. 4 EX Valve No. 2 IN Valve No. 7 IN 5.7 Adjusting a valve clearance 5 Count the valves from the timing cover end of the engine. 6 Remember, the inlet and exhaust valve clearances are different. 7 Insert the appropriate feeler gauge between the end of the valve stem and the rocker arm. It should be a stiff sliding fit (photo). 8 If the clearance is incorrect, release the rocker arm adjuster screw locknut using a ring spanner. Turn the adjuster screw using a small open-ended spanner, but tie something to it in case it is inadvertently dropped through one of the pushrod holes. 9 Once the clearance is correct, tighten the locknut without moving the position of the adjuster screw. 10 Repeat the operations on the remaining seven valves. 11 Re-check all the clearances. Make sure that the rocker cover gasket is in good condition and fit the rocker cover. 3 1 Remove the alternator drivebelt as described in Chapter 2. 2 Unscrew and remove the crankshaft pulley nut. To prevent the crankshaft rotating, either select a gear and have an assistant apply the footbrake hard or remove the starter motor and lock the ring gear teeth with a large cold chisel or screwdriver. 3 Disconnect the hoses from the fuel pump. 4 Unbolt and remove the fuel pump with spacer and rod. 5 Support the engine on a hoist or under the sump and disconnect and remove the right-hand mounting. Then unscrew and remove the timing cover bolts. The base of the cover is secured by the front two sump pan studs. Unbolt and lower the front end of the sump. Avoid breaking the gasket. Remove the timing cover. 6 Undo and remove the camshaft sprocket securing bolt; this will also release the fuel pump drive cam from the end of the camshaft. Note the timing marks on the camshaft and crankshaft sprockets. 7 Using two tyre levers, carefully ease the two sprockets forwards away from the crankcase. Lift away the two sprockets and timing chain. 8 Remove the Woodruff key from the crankshaft nose with a pair of pliers and note how the channel in the pulley is designed to fit over it. Place the Woodruff key in a container as it is a very small part and can easily become lost. The camshaft sprocket is located on the camshaft by a dowel peg. Refitting 9 Fit the Woodruff key to the front of the crankshaft. 10 Tap the crankshaft sprocket onto the front of the crankshaft. 11 Turn the sprocket so that the Woodruff key is uppermost. 12 Turn the camshaft until it is in such a position that if the sprocket was fitted the dimple timing mark on the sprocket would be nearest to and in alignment with, the one on the crankshaft sprocket. Fig. 1.6 Timing chain and sprockets (Sec 6) 1 Sprocket retaining bolt 4 Camshaft sprocket 7 Woodruff key 2 Fuel pump eccentric cam 5 Sprocket locating dowel 8 Crankshaft 3 Timing chain 6 Camshaft 9 Crankshaft sprocket 1 1•10 903 cc engine 6.13A Fitting the sprockets and timing chain 6.13B Timing mark alignment 6.13C Self-tensioning links on inside of chain 13 Engage the timing chain with the teeth of the crankshaft sprocket. Then locate the camshaft sprocket within the upper loop of the chain in such a way that when the sprocket is pushed onto the camshaft, the timing marks will be in alignment. Make sure that the self-tensioning links are on the inside of the chain against the cylinder block (photos). 14 Place the camshaft sprocket onto the camshaft so that its positioning dowel engages. 15 Secure the camshaft sprocket by fitting the special cam, that drives the fuel pump, on its locating dowel. Fit the camshaft sprocket retaining bolt (photo). 16 Tighten the sprocket bolt to the specified torque. 17 If the timing cover oil seal showed signs of leaking before engine overhaul the old seal should be removed and a new one fitted. 18 Using a screwdriver, carefully remove the old oil seal, working from the rear of the cover. Fit the new seal making sure it is inserted squarely, and tap home with a hammer. 19 Lubricate the oil seal with engine oil. 20 With all traces of old gasket and jointing compound removed from the timing cover and cylinder block mating faces, smear a little grease onto the timing cover mating face and fit a new gasket in position. 21 Fit the timing cover to the cylinder block and finger tighten the securing bolts, and spring washer. Ensure that the fuel pump pushrod bush is in place in the cover. 22 Wipe the hub of the pulley and carefully place into position on the crankshaft. It should locate on the Woodruff key. It may be necessary to adjust the position of the timing cover slightly in order to centralise the oil seal relative to the pulley hub. 23 Tighten the timing cover securing bolts in a diagonal and progressive manner. 24 Tighten the crankshaft pulley nut to the specified torque again holding the crankshaft against rotation as previously described (paragraph 2) this Section. 25 Refit the fuel pump and alternator drivebelt. ease the valve rocker assembly from the cylinder head studs. 13 Remove the pushrods, keeping them in the relative order in which they were removed. The easiest way to do this is to push them through a sheet of thick paper or thin card in the correct sequence. 14 Unscrew the cylinder head securing bolts half a turn at a time in the reverse order to that shown in Fig. 1.7; don’t forget the one within the inlet manifold. When all the bolts are no longer under tension they may be unscrewed from the cylinder head one at a time. This will also release a section of the cooling system pipe secured by two of the bolts. All the bolts have washers. 15 The cylinder head may now be lifted off. If the head is jammed, try to rock it to break the seal. Under no circumstances try to prise it apart from the cylinder block with a screwdriver or cold chisel as damage may be done to the faces of the head or block. If this or the Hint, fail to work, strike the head sharply with a plastic headed hammer, or with a wooden hammer, or with a metal hammer with an interposed piece of wood to cushion the blows. Under no circumstances hit the head directly with a metal hammer as this may cause the casting to fracture. Several sharp taps with the hammer, at the same time pulling upwards, should free the head. Lift the head off and place on one side. 6.15 Fitting fuel pump drive cam and sprocket bolt 7 Cylinder head removal and refitting 3 1 For safety reasons, disconnect the battery negative lead. 2 Refer to Chapter 2 and drain the cooling system. 3 Refer to Chapter 3 and remove the carburettor, air cleaner and spacer block. 4 Undo and remove the five nuts and washers securing the exhaust manifold and hot air ducting to the cylinder head. 5 Detach the cable from the temperature indicator sender unit. 6 Refer to Chapter 4 and disconnect the distributor LT lead and the coil HT lead. 7 Refer to Chapter 2 and remove the thermostat housing from the cylinder head. 8 Disconnect the coolant hoses from the cylinder head. 9 Note the electrical connections to the rear of the alternator and disconnect them. 10 Disconnect the mounting and adjuster link bolts and remove the alternator from the engine. 11 Unscrew the four nuts securing the rocker cover to the top of the cylinder head and lift away the spring washers and metal packing pieces. Remove the rocker cover and cork gasket. 12 Unscrew the four rocker pedestal securing nuts in a progressive manner. Lift away the four nuts and spring washers and If the head will not readily free, turn the crankshaft. The compression generated in the cylinders will often break the gasket joint 16 The cylinder head may now be decarbonised or dismantled, refer to Section 17. Refitting 17 After checking that both the cylinder block and cylinder head mating surfaces are perfectly clean, generously lubricate each cylinder with engine oil. 18 Always use a new cylinder head gasket as the old gasket will be compressed and not capable of giving a good seal. 903 cc engine 1•11 7.20 Cylinder head gasket 7.24A Cylinder head bolt in intake manifold 19 Never smear grease on the gasket as, when the engine heats up, the grease will melt and may allow compression leaks to develop. 20 The cylinder head gasket cannot be fitted incorrectly due to its asymmetrical shape, but the word ALTO should be uppermost in any event (photo). 21 The locating dowels should be refitted to the front right and left-hand side cylinder head securing bolt holes. 22 Carefully fit the cylinder head gasket to the top of the cylinder block. 23 Lower the cylinder head onto the gasket, taking care not to move the position of the gasket. 24 Screw in the cylinder head bolts finger tight, remembering the bolt within the intake manifold and the metal coolant pipe which is held by the two cylinder head bolts adjacent to the coolant temperature sender unit (photos). 25 Tighten the cylinder head bolts in two stages, in the specified sequence to the torque given in Specifications. 26 With the cylinder head in position, fit the pushrods in the same order in which they were removed. Ensure that they locate properly in the stems of the tappets and lubricate the pushrod ends before fitment (photo). 27 Unscrew the rocker arm adjuster screws as far as they will go. 28 Fit the rocker gear over the four studs in the cylinder head and lower onto the cylinder head. Make sure the ball ends of the rockers locate in the cups of the pushrods. 29 Fit the four nuts and washers to the rocker shaft pedestal studs and tighten in a progressive manner to the torque wrench setting given in the Specifications. 30 Adjust the valve clearances as described in Section 5. 31 Fit the exhaust manifold, thermostat housing and alternator, also the rocker cover (photo). 32 Fit the carburettor, air cleaner and distributor (Chapter 4). 33 Reconnect all hoses and electrical leads, including the battery. 34 Refill the cooling system. 4 Fit the new sealing strips and if necessary, trim their ends until they are just proud of the sump pan flange (photo). 5 Using thick grease, stick the gasket side strips to the crankcase. 6 Apply a blob of jointing compound at the points of overlap of the side gaskets and strips. 7 Offer up the sump pan, screw in and tighten the bolts and nuts progressively (photos). 8 Refill the engine with oil. 7.31 Fitting the rocker cover 8.4 Sump pan sealing strip 8.7A Fitting the sump pan 8 Sump pan removal and refitting 7.24B Cylinder head bolts holding coolant pipe Fig. 1.7 Cylinder head bolt tightening sequence (Sec 7) 1 1 Drain the engine oil. 2 Unscrew and remove the four nuts and twelve bolts and lift away the sump pan. If it has stuck on the gasket carefully tap the side of the mating flange to break the seal. Remove the gasket and clean away any pieces of gasket cement which are adhering to the flanges. 3 Remove the sealing strips from the recesses at either end of the sump pan. Refitting 7.26 Fitting a pushrod 1 1•12 903 cc engine 8.7B Sump pan nut, bolts and washers 9 Pistons/connecting rods removal and refitting 3 1 Remove the cylinder head as described in Section 7. 2 Remove the sump pan as described in Section 8. 3 Undo and remove the big-end cap retaining bolts and keep them in their respective order for correct refitting. 4 Check that the connecting rod and big-end bearing cap assemblies are correctly marked. Normally the numbers 1-4 are stamped on adjacent sides of the big-end caps and connecting rods, indicating which cap fits on which rod and which way round the cap fits. The numbers are located on the sides of the rod and cap furthest away from the camshaft. 5 If numbers are not evident, then use a sharp file to make mating marks across the rod/cap joint. One line for connecting rod No. 1, two for connecting rod No. 2 and so on. This will ensure that there is no confusion later as it is most important that the caps go back in the correct position on the connecting rods from which they were removed. No. 1 piston should be at the crankshaft pulley end of the engine. 6 If the big-end caps are difficult to remove they may be gently tapped with a soft-faced hammer. 7 To remove the shell bearings, press the bearing opposite the groove in both the connecting rod and the connecting rod caps and the bearings will slide out easily. 8 Keep the shells with their original cap or rod if the bearings are not being renewed. 9 Withdraw the pistons and connecting rods upwards and ensure that they are kept in the correct order for replacement in the same bore. 10 If the cylinder has a wear ridge at its upper end then this may make it difficult to remove the piston. In this event, relieve the sharp edge of the ridge by scraping. 11 Dismantling the pistons is described in Section 18, paragraph 17. 12 Lay the piston and connecting rod assemblies in the correct order ready for refitting into their respective bores. Fig. 1.8 Piston/connecting rod components (Sec 9) 1 Bolt 2 Connecting rod 3 Oil control ring 4 Compression ring (stepped at base) 5 Compression ring (marked TOP) 6 Gudgeon pin 7 Piston gudgeon pins 8 Big-end shell bearings 13 With a wad of clean non-fluffy rag wipe the cylinder bores clean. 14 Position the piston rings so that their gaps are 120º apart and then lubricate the rings. 15 Wipe clean the connecting rod half of the big-end bearing and the underside of the shell bearing. Fit the shell bearing in position with its locating tongue engaged with the corresponding groove in the connecting rod. 16 Fit a piston ring compressor to the top of the piston, making sure it is tight enough to compress the piston rings. 17 Using a piece of fine wire double check that the little jet hole in the connecting rod is clean. 18 The pistons, complete with connecting rods, are fitted to their bores from above. The number stamped on the connecting rod must face away from the camshaft with the arrow on the piston crown pointing towards the timing cover. 19 With the base of the piston ring compressor resting on the cylinder block, apply the wooden handle of a hammer to the piston crown, strike the hammer head with the hand and drive the piston/rod into its bore (photo). 20 Draw the rod, complete with shell bearing down onto its crankpin. 21 Generously lubricate the crankpin journals with engine oil, and turn the crankshaft so that the crankpin is in the most advantageous position for the connecting rod to be drawn into it. 22 Wipe clean the connecting rod bearing cap and back of the shell bearing and fit the shell bearing in position ensuring that the locating tongue at the back of the bearing engages with the locating groove in the connecting rod cap. 23 Generously lubricate the shell bearing and offer up the connecting rod bearing cap to the connecting rod (photo). 9.19 Fitting a piston/connecting rod 9.23 Big-end cap 903 cc engine 1•13 24 Screw in the big-end bolts and tighten to the specified torque (photo). 25 Refit the sump pan (Sec 8) and the cylinder head (Sec 7). 26 Refill the engine with oil and coolant. 10 Oil pump removal and refitting 1 1 Remove the sump pan as described in Section 8. 2 Unscrew the two bolts which hold the oil pump housing to the underside of the crankcase and withdraw the pump. Remove and discard the pump flange gasket. 9.24 Tightening a big-end bolt 10.3 Oil pump gasket Refitting 3 Stick a new gasket to the oil pump location on the underside of the crankcase (photo). 4 Locate the oil pump driveshaft in the oil pump and then offer up the complete assembly to the crankcase so that the gear teeth on the driveshaft mesh with those on the camshaft (photo). 5 Fit the securing bolts (photo). 6 Fit the sump pan and refill the engine with oil. 11 Engine mountings renewal 1 1 The engine/transmission flexible mountings can be removed if the power unit is supported under the sump pan or gearbox with a jack, or a hoist is attached to the engine lifting lugs and the weight of the power unit just taken. 2 Unscrew the mounting bracket bolts and remove the mounting. 3 Fit the new mounting and remove the lifting gear. 4 In the unlikely event of all the mountings requiring renewal at the same time, renew them one at a time, never disconnect all the mountings together. Fig. 1.9 Coolant temperature switch (Sec 13) 1 10.4 Fitting the oil pump 10.5 Tightening an oil pump bolt 12 Engine - method of removal 1 The engine/transmission should be removed downwards and withdrawn from under the front of the car which will have to be raised sufficiently high to provide clearance. 13 Engine/transmission removal and separation 3 1 Open the bonnet, disconnect the windscreen washer tube. 2 Mark the hinge positions on the underside of the bonnet using masking tape and then Fig. 1.10 Clutch cable disconnected (Sec 13) C Reversing switch cables with the help of an assistant to support its weight unbolt the bonnet and remove it to a safe place. 3 Disconnect the battery negative lead. 4 Drain the cooling system and engine oil. 5 Disconnect the leads from the rear of the alternator, the starter motor and the oil pressure switch also the coolant temperature switch. 6 Disconnect the HT lead from the ignition coil and the LT lead from the distributor. Disconnect the transmission earth strap. 7 Remove the air cleaner. 8 Disconnect the clutch cable from the release lever at the transmission. 9 Disconnect the speedometer drive cable by unscrewing the knurled nut from the transmission. Fig. 1.11 Speedometer drive cable at transmission (Sec 13) 1•14 903 cc engine Fig. 1.12 Coolant hoses at thermostat housing (Sec 13) Fig. 1.13 Coolant hose at rear of coolant pump (Sec 13) Fig. 1.14 Fuel inlet hose disconnected from pump (Sec 13) Fig. 1.15 Fuel return hose disconnected from carburettor (Sec 13) Fig. 1.16 Gearchange rods disconnected (Sec 13) Fig. 1.17 Tie-rod end balljoint disconnected (Sec 13) Fig. 1.18 Hub carrier detached from strut clamp (Sec 13) Fig. 1.19 Left-hand flexible mounting (Sec 13) 10 Disconnect the leads from the reversing lamp switch. 11 Disconnect the coolant hoses from the cylinder head and coolant pump. 12 Disconnect the fuel inlet hose from the fuel pump. Plug the hose. 13 Disconnect the throttle and choke controls from the carburettor. 14 Disconnect the heater hoses from the engine. 15 Disconnect the fuel return hose from the carburettor. 16 Disconnect the exhaust downpipe from the manifold. 17 Raise the front end of the car and support it securely on axle stands. Remove the roadwheels. 18 Unscrew the driveshaft to hub nuts. These are very tight and a long knuckle bar will be required when unscrewing them. Have an assistant apply the brakes hard to prevent the hub turning. 19 Working under the car, remove the protective shields and disconnect the exhaust system mountings and withdraw it to the rear. 20 Disconnect the forward ends of the gearchange rods by prising their sockets from the ballstuds. 21 Unscrew the nuts on the steering tie-rod end balljoints and using a suitable “splitter” tool separate the balljoints from the steering arms. Unbolt the brake calipers and tie them up out of the way. 22 Unscrew and remove the bolts which secure the hub carriers to the U-clamps at the base of the suspension struts (photo). 23 Pull the tops of the hub carriers from the clamps and release the driveshafts from the hub carriers. 24 Tie the driveshafts in a horizontal plane with lengths of wire. 25 Support the engine on a hoist or use a trolley jack under the engine/transmission and remove the bottom mounting and then the upper left and right-hand ones (photo). 26 Carefully lower the power unit to the floor and withdraw it from under the car. 27 External dirt and grease should now be removed using paraffin and a stiff brush or a water-soluble solvent. 28 Unbolt and remove the engine mounting brackets and the starter motor. 29 Unbolt and remove the cover plate and gearchange ball stud strut from the lower front face of the flywheel housing. 30 With the engine resting squarely on its sump pan unscrew the flywheel housing connecting bolts noting the location of any lifting lugs and hose and wiring brackets. 13.22 Hub carrier strut clamp 13.25 Right-hand engine mounting Fig. 1.20 Flywheel housing cover plate removed (Sec 13) 903 cc engine 1•15 31 Support the weight of the transmission and withdraw it in a straight line from the engine. 14 Engine - dismantling (general) 1 Stand the engine on a strong bench at a suitable working height. Failing this, it can be dismantled on the floor, but at least stand it on a sheet of hardboard. 2 During the dismantling process, the greatest care should be taken to keep the exposed parts free from dirt. As the engine is stripped, clean each part in a bath of paraffin. 3 Never immerse parts with oilways in paraffin, e.g. the crankshaft, but to clean, wipe down carefully with a paraffin dampened rag. Oilways can be cleaned out with a piece of wire. If an air line is available, all parts can be blown dry and the oilways blown through as an added precaution. 4 Re-use of old gaskets is false economy and can give rise to oil and water leaks, if nothing worse. To avoid the possibility of trouble after the engine has been reassembled always use new gaskets throughout. Fig. 1.21 Camshaft and rocker gear components (Sec 16) 1 Camshaft bush lockbolt 2 Washer 3 Camshaft front bearing 4 Exhaust valve 5 Spring cap 6 Valve guide 7 Adjuster screw Do not throw the old gaskets away as it sometimes happens that an immediate replacement cannot be found and the old gasket is then very useful as a template. Hang up the gaskets on a suitable nail or hook as they are removed. 8 9 10 11 12 13 14 15 16 Rocker arm Thrust washer Circlip Locknut Washer Locknut Pedestal Rocker arm Plug 17 18 19 20 21 22 23 24 25 Rocker shaft Coil spring Stud Split collets Spring cap Valve guide Outer valve spring Inner valve spring Spring seat 26 27 28 29 30 31 32 33 Inlet valve Camshaft bearing Camshaft bearing Camshaft Locating dowel Cam follower Pushrod Washer 5 To strip the engine, it is best to work from the top downwards. The engine oil sump provides a firm base on which the engine can be supported in an upright position. When the stage is reached where the pistons are to be removed, turn the engine on its side. Turn the block upside down to remove the crankshaft. 6 Wherever possible, replace nuts, bolts and washers finger-tight from wherever they were removed. This helps avoid later loss and muddle. If they cannot be replaced then lay them out in such a fashion that it is clear from where they came. 15 Engine - removing ancillary components 1 Before dismantling the engine, remove the engine ancillary components. Carburettor (Chapter 3) Thermostat housing (Chapter 2) Alternator (Chapter 9) Coolant pump (Chapter 2) Distributor (Chapter 4) Exhaust manifold (Chapter 3) Fuel pump (Chapter 3) Oil filter cartridge (Section 2 this Chapter) Clutch (Chapter 5) Fig. 1.22 Cylinder head, block and crankcase (Sec 16) 1 2 3 4 Washer Cylinder head bolt Gasket Rocker cover gasket 5 Rocker cover 6 7 8 9 10 11 Washer Plate Nut Stud Plug Cylinder head 12 13 14 15 16 17 Plug Cylinder head bolt Washer Dowel Plug Plug 18 19 20 21 22 23 Dowel Block/crankcase Plug Plug Bolt Plug 1 1•16 903 cc engine Fig. 1.23 Timing cover, sump pan and oil seals (Sec 16) 1 2 3 4 5 6 7 Sump pan bolt Washer Sealing strip Side gasket Side gasket Block/crankcase Gasket 8 9 10 11 Bolt Washer Bolt and washer Crankshaft front oil seal 12 Timing cover 14 Gasket 16 Engine complete dismantling 3 1 Unbolt and remove the rocker cover. 2 Unscrew the rocker pedestal securing nuts and lift away the rocker assembly. 3 Remove the pushrods, keeping them in their original fitted order. 4 Remove the cylinder head as described in Section 7. Remove the dipstick and guide tube. 13 Fuel pump studs and bush 15 Cover plate 16 Bolt and washer 17 Bolt 18 Bolt 19 Washer 20 Crankshaft rear oil seal 21 Oil seal carrier 22 Gasket 23 Sealing strip 24 Sump pan 25 Drain plug 5 Turn the engine on its side and unbolt and remove the sump pan. 6 Remove the piston/connecting rods as described in Section 9. 7 Unscrew and remove the crankshaft pulley nut. To prevent the crankshaft rotating while this is done, either jam the flywheel ring gear or place a block between a crankshaft counterweight and the inside of the crankcase. 8 Unbolt and remove the timing cover. 9 Remove the timing chain and sprockets as described in Section 6. 10 Unbolt and remove the oil pump as described in Section 10. 11 Unscrew and remove the camshaft front bearing lockscrew noting that the chamfer on the bearing is on the inboard side. 12 Withdraw the camshaft, taking great care not to damage the bearings with the cam lobes. 13 Lift out the cam followers and keep them in their originally fitted sequence. 14 Unbolt and remove the flywheel. Jam the ring gear teeth to prevent rotation. 15 Remove the engine rear plate. 16 Turn the cylinder block so that it is standing upside down. 17 Unbolt and remove the crankshaft rear oil seal carrier. Note the sump fixing studs. 18 The main bearing caps should be marked 1, 2 and 3 but if they are not, centre punch them and note which way round they are located. 19 Unscrew the main bearing cap bolts progressively. 20 Remove the bearing caps and half shells. If the shell bearings are to be used again, keep them with their respective caps. 21 Note the semi-circular thrust washers on either side of the centre main bearing which control crankshaft endfloat. 22 Lift the crankshaft from the crankcase. 23 Remove the bearing shells from the crankcase and mark them as to position if they are to be used again. 17 Cylinder head - dismantling and decarbonising 4 1 The exhaust manifold and rocker gear will have been removed from the cylinder head during removal (see Section 7). 2 The valves should now be removed using a universal valve spring compressor. 3 Compress the first valve spring and extract the split cotters. If the valve spring refuses to compress, do not apply excessive force, but remove the compressor and place a piece of tubing on the spring retainer and strike it a sharp blow to release the collets from the valve stem. Refit the compressor and resume operations when the collets should come out. Fig. 1.24 Crankshaft and flywheel (Sec 16) 1 Centre main 3 Crankshaft bearing shells 4 Plug 2 Front main bearing 5 Starter ring gear shells 6 Dowel 7 Flywheel 8 Thrust plate 9 Bolt 10 Thrust washers 11 Rear main bearing shells 4 Gently release the compressor, take off the spring retaining cap, the valve spring and the spring seat. Remove the valve. Keep the valve with its associated components together and in numbered sequence so that they can be returned to their original positions. 5 A small box with divisions is useful for this purpose. Remove and discard the valve stem oil seals. 6 Remove the other valves in a similar way. 7 Bearing in mind that the cylinder head is of 903 cc engine 1•17 light alloy construction and is easily damaged use a blunt scraper or rotary wire brush to clean all traces of carbon deposits from the combustion spaces and the ports. The valve head stems and valve guides should also be freed from any carbon deposits. Wash the combustion spaces and ports down with paraffin and scrape the cylinder head surface free of any foreign matter with the side of a steel rule, or a similar article. 8 If the engine is installed in the car, clean the pistons and the top of the cylinder bores. If the pistons are still in the block, then it is essential that great care is taken to ensure that no carbon gets into the cylinder bores as this could scratch the cylinder walls or cause damage to the piston and rings. To ensure this does not happen, first turn the crankshaft so that two of the pistons are at the top of their bores. Stuff rag into the other two bores or seal them off with paper and masking tape. The waterways should also be covered with small pieces of masking tape to prevent particles of carbon entering the cooling system and damaging the coolant pump. side rock. If this is any more than almost imperceptible, new guides must be fitted. Again this is a job for your dealer as a special tool is required to ensure the correct installation depth and the cylinder head must be warmed to 80ºC (176ºF) before fitting the guides. 17 Commence reassembly by oiling the stem of the first valve and pushing it into its guide which should have been fitted with a new oil seal (photos). 18 Fit the spring seat. Fit the valve spring so that the closer coils are towards the cylinder head and then fit the spring retaining cap. 19 Compress the valve spring and locate the split cotters in the valve stem cut-out (photo). 20 Gently release the compressor, checking to see that the collets are not displaced. 21 Fit the remaining valves in the same way. 22 Tap the end of each valve stem with a plastic or copper-faced hammer to settle the components. 23 The cylinder head is now ready for refitting as described in Section 7. 9 With a blunt scraper carefully scrape away the carbon from the piston crown, taking care not to scratch the aluminium. Also scrape away the carbon from the surrounding lip of the cylinder wall. When all carbon has been removed, scrape away the grease which will now be contaminated with carbon particles, taking care not to press any into the bores. To assist prevention of carbon build-up the piston crown can be polished with a metal polish. Remove the rags or masking tape from the other two cylinders and turn the crankshaft so that the two pistons which were at the bottom are now at the top. Place rag in the cylinders which have been decarbonised, and proceed as just described. 10 Examine the head of the valves for pitting and burning, especially the heads of the exhaust valves. The valve seatings should be examined at the same time. If the pitting on the valve and seat is very slight, the marks can be removed by grinding the seats and valves together with coarse, and then fine, valve grinding paste. 11 Where bad pitting has occurred to the valve seats it will be necessary to recut them and fit new valves. This latter job should be entrusted to the local agent or engineering works. In practice it is very seldom that the seats are so badly worn. Normally it is the valve that is too badly worn for refitting, and the owner can easily purchase a new set of valves and match them to the seats by valve grinding. 12 Valve grinding is carried out as follows. Smear a trace of coarse carborundum paste on the seat face and apply a suction grinder tool to the valve head. With a semi-rotary motion, grind the valve head to its seat, lifting the valve occasionally to redistribute the grinding paste. When a dull matt even surface is produced on both the valve seat and the valve, wipe off the paste and repeat the process with fine carborundum paste, lifting and turning the valve to redistribute the paste as before. A light spring placed under the valve head will greatly ease this operation. When a smooth unbroken ring of light grey matt finish is produced, on both valve and valve seat faces, the grinding operation is complete. Carefully clean away every trace of grinding compound, take great care to leave none in the ports or in the valve guides. Clean the valve seats with a paraffin soaked rag, then with a clean rag, and finally, if an air line is available, blow the valves, valve guides and valve ports clean. 13 Check that all valve springs are intact. If any one is broken, all should be renewed. Check the free height of the springs against new ones. If some springs are not within specifications, replace them all. Springs suffer from fatigue and it is a good idea to renew them even if they look serviceable. 14 Check that the oil supply holes in the rocker arms are clear. 15 The cylinder head can be checked for warping either by placing it on a piece of plate glass or using a straight-edge and feeler blades. If there is any doubt or if its block face is corroded, have it re-faced by your dealer or motor engineering works. 16 Test the valves in their guides for side to 17.17A Valve stem oil seal 17.17B Inserting a valve into its guide 17.19 Fitting split collets Press a little grease into the gap between the cylinder walls and the two pistons which are to be worked on. 1 18 Examination and renovation 4 1 With the engine stripped down and all parts thoroughly clean, it is now time to examine everything for wear. The following items should be checked and where necessary renewed or renovated as described in the following Sections. Cylinder block and crankcase 2 Examine the casting carefully for cracks especially around the bolt holes and between cylinders. 3 The cylinder bores must be checked for taper, ovality, scoring and scratching. Start by examining the top of the cylinder bores. If they are at all worn, a ridge will be felt on the thrust side. This ridge marks the limit of piston ring travel. The owner will have a good indication of bore wear prior to dismantling by the quantity of oil consumed and the emission of blue smoke from the exhaust especially when the engine is cold. 4 An internal micrometer or dial gauge can be 1•18 903 cc engine Fig. 1.25 Checking a crankpin (Sec 18) Fig. 1.26 Piston/connecting rod relationship (Sec 18) used to check bore wear and taper against the Specifications, but this is a pointless operation if the engine is obviously in need of reboring due to excessive oil consumption. 5 Your engine reconditioner will be able to re-bore the block for you and supply the correct oversize pistons to give the correct running clearance. 6 If the engine has reached the limit for reboring then cylinder liners can be fitted, but here again this is a job for your engine reconditioner. 7 To rectify minor bore wear it is possible to fit proprietary oil control rings. A good way to test the condition of the engine is to have it at normal operating temperature with the spark plugs removed. Screw a compression gauge (available from most motor accessory stores) into the first plug hole. Hold the accelerator fully depressed and crank the engine on the starter motor for several revolutions. Record the reading. Zero the tester and check the remaining cylinders in the same way. All four compression figures should be approximately equal and within the tolerance given in the Specifications. If they are all low, suspect piston ring or cylinder bore wear. If only one reading is down, suspect a valve not seating. by specialist engine reconditioners who will supply the matching undersize bearing shells to give the required running clearance. 12 Inspect the connecting rod big-end and main bearing shells for signs of general wear, scoring, pitting and scratching. The bearings should be matt grey in colour. 13 If a copper colour is evident, then the bearings are badly worn and the surface material has worn away to expose the underlay. Renew the bearings as a complete set. 14 At the time of major overhaul it is worthwhile renewing the bearing shells as a matter of routine even if they appear to be in reasonably good condition. 15 Bearing shells can be identified by the marking on the back of the shell. Standard sized shells are usually marked STD or 0.00. Undersized shells are marked with the undersize such as 0.25 mm. Crankshaft and bearings 8 Examine the crankpin and main journal surfaces for signs of scoring or scratches. Check the ovality of the crankpins at different positions with a micrometer. If more than 0.001 inch (0.025 mm) out of round, the crankpins will have to be reground. They will also have to be reground if there are any scores or scratches present. Also check the journals in the same fashion. 9 Wear in a crankshaft can be detected while the engine is running. Big-end bearing and crankpin wear is indicated by distinct metallic knocking, particularly noticeable when the engine is pulling from low engine speeds. Low oil pressure will also occur. 10 Main bearing and journal wear is indicated by engine rumble increasing in severity as the engine speed increases. Low oil pressure will again be an associated condition. 11 Crankshaft grinding should be carried out Connecting rods 16 Check the alignment of the connecting rods visually. If you suspect distortion, have them checked by your dealer or engine reconditioner on the special jig which he will have. 17 The gudgeon pin is an interference fit in the connecting rod small-end and removal or refitting and changing a piston is a job best left to your dealer or engine reconditioner due to the need for a press and jig and careful heating of the connecting rod. 18.22 Piston ring marking 18.20 Using feeler blades to fit piston rings Pistons and piston rings 18 If the cylinders have been rebored, then the reconditioner will supply the oversize pistons and rings and the gudgeon pins. Give the job of fitting the new pistons to the connecting rods to him. 19 If the original piston rings or just new rings are to be fitted to the original pistons, use great care to remove and fit the rings as they are easily broken if expanded too much. Always remove and fit rings from the crown end. 20 If three old feeler blades are slid behind the piston rings and located at equidistant points, the rings may be removed or fitted without their dropping into the wrong grooves and will reduce the chance of breakage (photo). 21 If the original pistons are being refitted, make sure that the ring grooves and their oil return holes are cleaned out and freed from carbon. A piece of piston ring is a useful tool for this purpose. 22 The three pistons rings are as follows: Top - Thinner compression marked TOP Second - Thicker compression, step at base Bottom - Oil control (photo) 23 If proprietary wear control rings are to be fitted to overcome bore wear, fit them strictly in accordance with the manufacturer’s instructions. 24 Always check the piston ring groove 18.24A Checking piston ring groove clearance 903 cc engine 1•19 18.24B Checking piston ring end gap 18.32 Camshaft bearing clearance and end gap. Both clearances should be checked with a feeler gauge. Check the end gap when the ring has been pushed squarely down the cylinder bore for two or three inches (photos). 25 If new rings are being used and the cylinder bores have not been rebored, always make sure that the top compression ring has been stepped to prevent it contacting the bore wear ridge. are of different sizes and they can be removed and new ones fitted using a bolt, nut and distance pieces. When drawing a new bearing into position, make sure that the oil hole is correctly aligned with the one in the crankcase. The centre and rear bearings require reaming after fitting, the bearing at the timing chain end is supplied ready reamed (photo). 33 The camshaft itself should show no marks or scoring on the journal or cam lobe surfaces. Where evident, renew the camshaft or have it reprofiled by a specialist reconditioner. 34 Check the teeth of the camshaft sprocket for wear. Renew the sprocket if necessary. Flywheel 26 Check the clutch mating surface of the flywheel. If it is deeply scored (due to failure to renew a worn driven plate) then it may be possible to have it surface ground provided the thickness of the flywheel is not reduced too much. 27 If lots of tiny cracks are visible on the surface of the flywheel then this will be due to overheating caused by slipping the clutch or “riding” the clutch pedal. 28 With a pre-engaged type of starter motor it is rare to find the teeth of the flywheel ring gear damaged or worn but if they are, then the ring gear will have to be renewed. 29 To remove the ring gear, drill a hole between the roots of two teeth taking care not to damage the flywheel and then split the ring with a sharp cold chisel. 30 The new ring gear must be heated to between 180 and 220ºC (356 and 428ºF) which is very hot, so if you do not have facilities for obtaining these temperatures, leave the job to your dealer or engine reconditioner. 31 Where such facilities are available, then the ring gear should be either pressed or lightly tapped gently onto its register and left to cool naturally, when the contraction of the metal on cooling will ensure that it is a secure and permanent fit. Great care must be taken not to overheat the ring gear, as if this happens its temper will be lost. A clutch input shaft pilot bearing is not fitted on this engine. Camshaft 32 Examine the camshaft bearings for wear, scoring or pitting. If evident then the bearings will have to be renewed. The three bearings Cam followers 35 Examine the bearing surface of the cam followers which are in contact with the camshaft. Any indentations or cracks must be rectified by renewal. Clean sludge and dirt from the cam followers and check their fit in their bores. Side to side rock is unusual except at very high mileage. Timing chain 36 Examine the teeth on both the crankshaft sprocket and the camshaft sprocket for wear. Each tooth forms an inverted “V” with the sprocket periphery and if worn, the side of each tooth under tension will be slightly concave in shape when compared with the other side of the tooth, ie; one side of the inverted “V” will be concave when compared with the other. If any sign of wear is present the sprockets must be renewed. 37 Examine the links of the chain for side slackness and particularly check the self-tensioning links for freedom of movement. Renew the chain if any slackness is noticeable when compared with a new chain. It is a sensible precaution to renew the chain at about 60 000 miles (96 000 km) and at a lesser mileage if the engine is stripped down for a major overhaul. Cylinder head 38 This is covered in Section 17. 18.41 Rocker components Rockers and rocker shaft 39 Thoroughly clean out the rocker shaft. As it acts as the oil passages for the valve gear, clean out the oil holes and make sure they are quite clear. Check the shaft for straightness by rolling it on a flat surface. If it is distorted, renew it. 40 The surface of the shaft should be free from any wear ridges caused by the rocker arms. If it is not, the shaft will have to be renewed. Blocked shaft oil holes often contribute to such wear. 41 Check the rocker arms for wear of the rocker bushes, for wear at the rocker arm face which bears on the valve stem, and for wear of the adjusting ball ended screws. Wear in the rocker arm bush can be checked by gripping the rocker arm tip and holding the rocker arm in place on the shaft, noting if there is any lateral rocker arm shake. If any shake is present, and the arm is very loose on the shaft, remedial action must be taken. It is recommended that a worn rocker arm be taken to your local FIAT agent or automobile engineering works to have the old bush drawn out and a new bush fitted (photo). 42 Check the tip of the rocker arm where it bears on the valve head, for cracking or serious wear on the case hardening. If none is present the rocker arm may be refitted. Check the pushrods for straightness by rolling them on a flat surface. Oil pump 43 Unscrew the four securing bolts which connect the two halves of the pump body. 44 Clean all the components in a bath of paraffin and dry them. 45 Inspect the gears for wear or damage and then check for wear in the following way. 46 Insert a feeler blade between the tooth peak and the body. This should be between 0.05 and 0.14 mm (0.0019 and 0.0055 in). 47 Now place a straight-edge across the body flange and check for gear endfloat. This should be between 0.020 and 0.105 mm (0.0008 and 0.0041 in). Where the clearances exceed the specified limits, renew the pump. 48 Check that the oil pressure relief valve spring is in good condition and not deformed. 1 1•20 903 cc engine Oil seals and gaskets 1 2 3 4 5 6 7 8 9 10 11 Bolt Bolt Washers Washer Spring Drive gear Top housing Driven gear Plate Pressure relief valve Lower housing and oil pick-up 12 Filter screen Fig. 1.27 Exploded view of oil pump (Sec 18) 49 It is recommended that all gaskets and oil seals are renewed at major engine overhaul. Sockets are useful for removing or refitting oil seals. An arrow is moulded onto some seals to indicate the rotational direction of the component which it serves. Make sure that the seal is fitted the correct way round to comply with the arrow. 19 Engine - reassembly (general) 1 To ensure maximum life with minimum trouble from a rebuilt engine, not only must every part be correctly assembled, but everything must be spotlessly clean, all the oilways must be clear, locking washers and spring washers must always be fitted where indicated and all bearing and other working surfaces must be thoroughly lubricated during assembly. Before assembly begins renew any bolts or studs whose threads are in any way damaged; whenever possible use new spring washers. 2 Apart from your normal tools, a supply of non-fluffy rag, an oil can filled with engine oil, a supply of new spring washers, a set of new gaskets and a torque wrench should be gathered together. 20 Engine complete reassembly 4 Crankshaft and main bearings 20.1 Fitting a main bearing shell 20.2 Crankshaft thrust washer 20.4A Oiling main bearing shells 20.4B Lowering crankshaft into position 1 With the cylinder block inverted on the bench, wipe out the crankcase shell bearing seats and fit the half shells so that their tabs engage in the notches (photo). 2 Stick the semi-circular thrust washers either side of the centre bearing in the crankcase using thick grease. Make sure that the oil grooves are visible when the washers are fitted (photo). 3 If the original bearing shells are being refitted, make sure that they are returned to their original positions. 4 Liberally oil the bearing shells and lower the crankshaft into position. Make sure that it is the correct way round (photos). 5 Wipe out the main bearing caps and fit the bearing shells into them. 6 Oil the crankshaft journals and fit the main bearing caps, the correct way round and in proper sequence (photo). 7 Replace the main bearing cap bolts and screw them up finger-tight. 8 Test the crankshaft for freedom of rotation. Should it be very stiff to turn, or possess high spots, a most careful inspection must be made, preferably by a skilled mechanic with a 903 cc engine 1•21 20.6 Fitting a main bearing cap micrometer to trace the cause of the trouble. It is very seldom that any trouble of this nature will be experienced when fitting the crankshaft. 9 Tighten the main bearing bolts to the specified torque wrench settings (photo). 10 Using a dial gauge or feeler blades inserted between a thrust washer and the crankshaft, check the crankshaft endfloat. If it exceeds the specified limit, the thrust washers can be changed for thicker ones (photo). 11 Bolt on the crankshaft rear oil seal carrier using a new gasket. The carrier should have been fitted with a new oil seal and the seal lips greased (photos). 12 Fit the engine rear plate (photo). 20.9 Tightening main bearing cap bolts 20.10 Checking crankshaft end float 1 20.11A Crankshaft rear oil seal carrier and gasket 20.11B Crankshaft oil seal and carrier fitted 20.12 Engine rear plate 20.14 Tightening flywheel bolts 20.16A Fitting camshaft 20.16B Camshaft front bearing Flywheel 13 Offer the flywheel to the crankshaft. With pistons No. 1 and 4 at TDC, the dimple on the flywheel must be uppermost. 14 Screw in and tighten the bolts to the specified torque. The crankshaft may be held against rotation by either jamming the starter ring gear or placing a block of wood between one of the crankshaft webs and the inside of the crankcase (photo). Camshaft 15 Oil the cam followers and return them to their original positions (photo). 16 Oil the camshaft bearings and insert the camshaft, taking great care not to damage the bearings with the cam lobes. Fit the front bearing, chamfer inwards (photos). 20.15 Cam followers 1•22 903 cc engine 20.17 Camshaft front bearing lockscrew 17 Screw in the camshaft front bearing lockscrew (photo). Oil pump 18 Refit the oil pump as described in Section 10. Timing chain and sprockets 19 Fit the timing chain and sprockets as described in Section 6. Fit the Woodruff key to the crankshaft nose. 20 Using a new gasket, fit the timing chain cover, but leave the bolts finger tight (photo). 21 Apply grease to the lips of the timing cover oil seal and then push the crankshaft pulley into position. 22 Move the timing cover if necessary so that the pulley hub is centralised in the oil seal and then tighten the cover bolts. 23 Screw on the crankshaft pulley nut and tighten to the specified torque (photo). Hold the crankshaft against rotation either by jamming the starter ring gear or by placing a block of wood between a crankshaft web and the inside of the crankcase. 20.20 Timing cover Cylinder head 26 Stand the engine upright and fit the cylinder head as described in Section 7. 27 Insert the pushrods in their original fitted order. 28 With the rocker arm adjuster screws fully unscrewed, locate the rocker gear and screw on the fixing nuts. 29 Adjust the valve clearances as described in Section 5. 30 Locate a new gasket in position and fit the rocker cover (photo). 31 Screw on a new oil filter (Section 2). 21 Engine - refitting ancillary components 25 Fit the sump pan as described in Section 8. 1 Refer to Chapter 5 and refit the clutch, making sure to centralise the driven plate. 2 Fit the coolant pump as described in Chapter 2. Fit the thermostat housing if it was removed noting the air cleaner mounting bracket on the housing studs. 3 Fit the alternator and drivebelt as described in Chapter 9. 4 Refer to Chapter 3 and fit the exhaust manifold and hot air collector, the carburettor and spacer and the fuel pump. 5 Fit the distributor as described in Chapter 4. Fit the oil dipstick guide tube (photos). 20.30 Rocker cover nut and thrust plate 21.5A Dipstick guide tube Piston/connecting rods 24 Fit these as described in Section 9. Sump pan 20.23 Tightening crankshaft pulley nut 22 Engine/transmission reconnection 1 1 Support the weight of the transmission and offer it squarely to the engine. The splined input shaft should pass easily through the hub of the driven plate, provided the plate has been centralised as described in Chapter 5. It may be necessary to align the splines with the hub grooves, in which case have an assistant turn the crankshaft pulley nut. The alignment dowels will make the connection stiff, so drawing the engine and transmission together with two connecting bolts will ease it. 2 Once the engine and transmission are fully engaged, insert and tighten all the connecting bolts. Locate the lifting eyes. 3 Bolt on the flywheel housing cover plate and the mounting brackets. 4 Bolt on the starter motor. 23 Engine/transmission refitting 3 1 The refitting operations are reversals of those described in Section 13. 2 Observe the following special points. 3 Tighten the engine mounting and front suspension (disconnected) bolts to the specified torque when the hoist has been 21.5B Dipstick guide tube support 903 cc engine 1•23 removed and the weight of the car is again on its roadwheels. 4 Fill the cooling system. 5 Fill the engine with oil. 6 Replenish lost transmission oil. 7 Reconnect the battery. 8 Adjust the clutch pedal as described in Chapter 5. 24 Engine - initial start-up after overhaul or major repair 4 1 Make sure that the battery is fully charged and that all lubricants, coolant and fuel are replenished. 2 If the fuel system has been dismantled it will require several revolutions of the engine on the starter motor to pump the petrol up to the carburettor. 3 Turn the carburettor throttle speed screw through one complete turn to increase the idle speed in order to offset the initial stiffness of new engine internal components. 4 As soon as the engine fires and runs, keep it going at a fast idle speed and bring it up to normal working temperature. 5 As the engine warms up there will be odd smells and some smoke from parts getting hot and burning off oil deposits. The signs to look for are leaks of water or oil which will be obvious. 6 Check also the exhaust pipe and manifold connections as these do not always “find” their exact gas tight position until the warmth and vibration have acted on them and it is almost certain that they will need tightening further. This should be done, of course, with the engine stopped. 7 When normal running temperature has been reached, adjust the engine idle speed as described in Chapter 3. 8 Stop the engine and wait a few minutes to see if any lubricant or coolant is dripping out when the engine is stationary. 9 Road test the car to check that the timing is correct and that the engine is giving the necessary smoothness and power. Do not race the engine - if new bearings and/or pistons have been fitted it should be treated as a new engine and run in at a reduced speed for the first 500 km (300 miles). 10 After the first 1500 km (900 miles) the cylinder head bolts must be re-torqued in the following way (engine cold). 11 Remove the air cleaner and rocker cover. Unscrew the first bolt (Fig. 1.7) through a quarter turn and then tighten it to final stage 2 torque (see Specifications). 12 Repeat on the remaining bolts, one at a time. 13 Check and adjust the valve clearances (Section 5). 14 Refit the rocker cover and air cleaner. Part 3: 1116 cc and 1301 cc engines 25 Valve clearances - checking 2 This should only be required if the valves have been renewed or ground in, or at high mileages when noise or poor engine performance indicates that a check is necessary. It is important that each valve clearance is set correct otherwise the timing will be wrong and engine performance poor. If there is no clearance at all, the valve and its seat will soon burn. Always set the clearances with the engine cold. 1 Remove the camshaft cover. Jack-up a front wheel and engage top gear so that by turning the wheel, the crankshaft can be rotated. 2 Each valve clearance must be checked when the high point of the cam is pointing directly upward away from the cam follower. 3 Check the clearances in the firing order 1-3-4-2, No. 1 cylinder being at the timing belt end of the engine. This will minimise the amount of crankshaft rotation required. 25.4 Checking a valve clearance 4 Insert the appropriate feeler blade between the heel of the cam and the cam follower shim of the first valve. If necessary alter the thickness of the feeler blade until it is a stiff, sliding fit. Record the thickness, which will, of course, represent the valve clearance for this particular valve (photo). 5 Turn the crankshaft, check the second valve clearance and record it. 6 Repeat the operations on all the remaining valves, recording their respective clearances. 7 Remember that the clearance for inlet and exhaust valves differs - see Specifications. Counting from the timing cover end of the engine, the valve sequence is: Inlet 2-3-6-7 Exhaust 1-4-5-8 1 Check the valve clearances (Section 25). 2 Clearances which are incorrect will mean the particular shim will have to be changed. To remove the shim, turn the crankshaft until the high point of the cam is pointing directly upward. The cam follower will now have to be depressed so that the shim can be extracted. Special tools (A60642 and A87001) are available from your Fiat dealer to do the job, otherwise you will have to make up a forked lever to locate on the rim of the cam follower. This must allow room for the shim to be prised out by means of the cut-outs provided in the cam follower rim (photo). 3 Once the shim is extracted, establish its thickness and change it for a thicker or thinner one to bring the previously recorded clearance within specification. For example, if the measured valve clearance was 1.27 mm (0.05 in) too great, a shim thicker by this amount will be required. Conversely, if the clearance was 1.27 mm (0.05 in) too small, a shim thinner by this amount will be required. 4 Shims have their thickness (mm) engraved on them; although the engraved side should be fitted so as not to be visible, wear still occurs and often obliterates the number. In this case, measuring their thickness with a metric micrometer is the only method to establish their thickness (photo). 26.2 Removing a shim from a cam follower 26.4 Shim engraved mark 26 Valve clearances adjustment 3 1 1•24 1116 cc and 1301 cc engine 27.13A Removing camshaft end cover 27.13B Withdrawing camshaft from carrier 5 In practice, if several shims have to be changed, they can often be interchanged, so avoiding the necessity of having to buy more new shims than is necessary. 6 If more than two or three valve clearances are found to be incorrect, it will be more convenient to remove the camshaft carrier for easier removal of the shims. 7 Where no clearance can be measured, even with the thinnest available shim in position, the valve will have to be removed and the end of its stem ground off squarely. This will reduce its overall length by the minimum amount to provide a clearance. This job should be entrusted to your dealer as it is important to keep the end of the valve stem square. 8 On completion, refit the camshaft cover and gasket. fitted if it is to be completely removed. The lettering on the belt is normally legible from the crankshaft pulley end of the engine when the belt is as originally fitted. 11 Unbolt the camshaft carrier and lift it sufficiently from the cylinder head to break the seal of the mating faces. Note: It is important not to allow the cam followers to pull out; they must be retained in their original locations. This can be done if the carrier is raised very slowly, until the fingers can be inserted to prise the cam followers onto their respective valve spring retainers. It is unlikely that the valve clearance adjusting shims will be displaced from their recesses in the cam followers because of the suction of the lubricating oil, but watch that this does not happen; the shims must also be retained in their originally fitted sequence. 12 Remove the previously loosened camshaft sprocket bolt and take the sprocket from the camshaft. 13 Unbolt and remove the camshaft end cover with its gasket. Withdraw the camshaft (photos). 14 Refitting is a reversal of the removal process, but observe the following points. 15 Use new gaskets. 16 Retain the cam followers and shims in their bores in the camshaft carrier with thick grease; they must not be allowed to drop out when the carrier is lowered onto the cylinder head. 17 If the crankshaft or camshaft have been moved from their set positions, re-align the sprocket timing mark with the pointer on the belt cover and the crankshaft pulley or flywheel with the TDC mark. This must be observed otherwise the valves may impinge upon the piston crowns when the camshaft lobes compress any of the valve springs during bolting down of the carrier. 18 Screw in the carrier bolts and tighten them to the specified torque (photo). 19 Refit and tension the timing belt as described in Section 28. 20 Refit the camshaft cover and gasket. 21 Refit the hose and air cleaner. 22 Reconnect the battery. 27 Camshaft and camshaft carrier - removal and refitting 3 1 Disconnect the battery. 2 Remove the air cleaner (see Chapter 3). 3 Disconnect the fuel filter hose from the fuel pump and tie it back, out of the way. 4 Identify and then disconnect any electrical leads which must be moved away to enable the camshaft cover to be withdrawn. 5 Identify and disconnect any vacuum gases which must be moved away to enable the camshaft cover to be withdrawn. 6 Unscrew the securing nuts and remove the camshaft cover. 7 Turn the crankshaft pulley nut until No. 4 piston is at TDC. This can be established as described in Section 28. 8 Unbolt and remove the timing belt cover. 9 Check that the timing mark on the camshaft sprocket is aligned with, and adjacent to the pointer on the timing belt cover backplate. 10 Restrain the timing belt with the hand and release but do not remove the camshaft sprocket bolt. Release the belt tensioner pulley by slackening the pulley centre nut. Push the timing belt evenly from the sprockets, noting which way round the belt is 27.18 Tightening a camshaft carrier bolt 28 Timing belt - renewal 3 1 Set No. 4 piston at TDC. Do this by turning the crankshaft pulley nut or by jacking up a front roadwheel, engaging a gear and turning the wheel until the mark on the flywheel is opposite to the TDC mark on the flywheel bellhousing aperture. Remove No. 4 spark plug, place a finger over the plug hole and feel the compression being generated as the crankshaft is rotated and the piston rises up the cylinder bore. 2 On some models the TDC marks on the crankshaft pulley and belt cover may be visible and can be used instead. 3 Remove the alternator drivebelt (Chapter 2, Section 8). Unbolt and remove the timing belt cover. 4 Check that the timing mark on the camshaft sprocket is aligned with the pointer on the belt cover backing plate (photo). 5 Slacken the nut in the centre of the tensioner pulley and push in on the support to release the tension on the belt, then retighten the nut. Slide the drivebelt off the pulleys. 6 Check that the crankshaft and camshaft pulleys have not been moved from their previously aligned positions. 7 To check that the auxiliary shaft sprocket has not moved, take off the distributor cap and check that the contact end of the rotor arm is aligned with No. 4 HT lead contact in the cap. 28.4 Camshaft sprocket alignment marks 1116 cc and 1301 cc engine 1•25 Fig. 1.28 TDC marks (1) at front of engine (Sec 28) 28.8 Slipping timing belt onto tensioner pulley 8 Fit the new belt. Start at the crankshaft drive pulley and, taking care not to kink or strain the belt, slip it over the camshaft pulley. The camshaft may have to be turned slightly to mesh the pulley with the teeth on the belt. Fit the belt on the tensioner pulley last; if this is difficult, do not lever or force the belt on, recheck the belt (photo). 9 Release the tensioner nut and rotate the crankshaft through two complete revolutions. Retighten the nut. The belt tension may be checked by twisting it through 90º with the finger and thumb. It should just turn through this angle without undue force. Note: The above procedure serves only as a rough guide to setting the belt tension - having it checked by a FIAT dealer at the earliest opportunity is recommended. 10 Refit the timing belt cover (photo). Fit and tension the alternator drivebelt (Chapter 2, Section 8). 5 Disconnect the HT leads from the spark plugs. 6 Disconnect the brake servo vacuum hose from the intake manifold. 7 Disconnect the coolant hoses from the thermostat housing. 8 Disconnect the crankcase ventilation system hoses from the rocker cover and carburettor. 9 Unbolt and remove the timing belt cover. 10 Release the timing belt tensioner pulley bolt, then lever the pulley against the spring plunger and retighten the bolt to retain the tensioner pulley in the non-tensioned position. Slip the belt from the camshaft sprocket. 11 Disconnect the coolant hoses from the carburettor and intake manifold. 12 Disconnect the exhaust downpipes from the manifold. 13 If a crowfoot type wrench is available, the cylinder head nuts and bolts can be removed and the complete cylinder head camshaft carrier assembly withdrawn (photo). 14 If this type of wrench is not available however, remove the carrier first as described in Section 27. 15 If a crowfoot is available, unscrew the cylinder head nuts and bolts evenly and progressively starting with the centre ones and working towards both ends. 16 Rock the cylinder head by gripping the manifolds. Note: Do not insert a lever in the gasket joint to prise the head from the block. 17 Pull the head off the studs and remove it to the bench. Remove and discard the old cylinder head gasket. 18 Unbolt and remove the hot air collecting shield for the air cleaner from the exhaust manifold. The exhaust and inlet manifolds can now be unbolted. The carburettor may remain on the inlet manifold. 19 Overhaul and decarbonising of the cylinder head is described in Section 39. 20 Refitting is a reversal of the removal process, but make sure the crankshaft and camshaft timing marks are set as described in Section 28 to avoid the valve heads digging into the piston crowns when the head is refitted. 21 Always use new gaskets. The cylinder 29.13 Using a crowfoot type wrench on a cylinder head bolt Fig. 1.30 Cylinder head bolt tightening sequence (Sec 29) 29 Cylinder head removal and refitting 3 1 Drain the cooling system (see Chapter 2). 2 Disconnect the battery. 3 Disconnect and plug the carburettor fuel hoses. 4 Disconnect the throttle and choke linkage from the carburettor. 28.10 Tightening timing belt cover nut Fig. 1.29 Timing belt arrangement (Sec 28) 1 Camshaft sprocket 2 Tensioner pulley locknut 3 Timing mark on crankshaft front oil seal retainer 4 Crankshaft sprocket 5 Crankshaft sprocket timing mark 6 Auxiliary shaft sprocket 7 Tensioner bracket bolt 8 Tensioner pulley 9 Timing belt 10 Tensioner bracket 11 Tensioner spring 1 1•26 1116 cc and 1301 cc engine 29.21A Cylinder head gasket top face marking head gasket must be fitted (ALTO visible) so that the oil pressure hole in the block is central in the copper ringed cut-out in the gasket (photos). Make sure that the gasket surfaces on head and block are perfectly clean and free from oil, otherwise the heat sealing (polymerisation) process of the gasket cannot take place. 22 Tighten the cylinder head nuts and bolts to the specified torque, in the sequence shown in Fig. 1.30. Follow the procedure very carefully owing to the special type (ASTADUR) of gasket used which hardens in use. Always keep a new cylinder head gasket in its nylon cover until just before it is required for use. 23 Oil the cylinder head bolts and washers and allow them to drain for thirty minutes. 24 Tighten the bolts in the following stages: Stage 1 20 Nm (15 lbf ft) Stage 2 40 Nm (30 lbf ft) Stage 3 Through 90º Stage 4 Through 90º (photo) Retightening the bolts after a running-in mileage is not required. 25 Fit the timing belt (Section 28). 26 Check the valve clearances (Section 26) after the camshaft carrier has been fitted (Section 27). 27 Bolt on the camshaft carrier cover. 28 Reconnect all hoses, leads and controls. 29 Reconnect the battery and refill the cooling system. 29.21B Cylinder head gasket in position cylinder block drain plug arrowed 29.21C Lowering cylinder onto block 31 Oil pump removal and refitting 1 1 Remove the sump pan as described in the preceding Section. 2 Unbolt the oil pump and withdraw it complete with driveshaft. 3 Use a new gasket when refitting the pump and prime the pump by pouring engine oil through the pick-up filter screen (photo). 29.24 Tightening a cylinder head bolt through 90º using a protractor 30 Sump pan removal and refitting 1 32 Pistons/connecting rod removal and refitting 3 1 Remove the sump pan and the oil pump as described in Sections 30 and 31. 1 Position the car over an inspection pit or raise the front wheels on ramps. 2 Disconnect the battery. 3 Drain the engine oil. Unbolt and remove the flywheel housing lower cover plate. 4 Unbolt the sump pan and remove it together with its gasket. 5 Refitting is a reversal of removal. Always use a new gasket locating it on clean mating flanges and tighten the fixing bolts evenly and progressively (photo). 6 Fill the engine with oil and reconnect the battery. Fig. 1.31 Piston/connecting rod assembly diagram (Sec 32) 30.5 Locating the sump pan gasket 31.3 Bolting on the oil pump 1 Matching numbers 2 Gudgeon pin offset 3 Auxiliary shaft Arrow indicates direction of rotation of crankshaft viewed from timing belt end 1116 cc and 1301 cc engine 1•27 32.14 Fitting piston into cylinder bore 32.15 Fitting a big-end cap 32.16 Tightening a big-end cap nut 2 The big-end bearing shells can be renewed without having to remove the cylinder head if the caps are unbolted and the piston/connecting rod pushed gently about one inch up the bore (the crankpin being at its lowest point). If these shells are worn, however, the main bearing shells will almost certainly be worn as well. In this case, the engine should be removed for complete overhaul including crankshaft removal. 3 To remove the piston/connecting rods, remove the cylinder head as described in Section 29. 4 Grip the oil pick-up pipe and twist or rock it from its hole in the crankcase. It is an interference fit in the hole. 5 Unscrew the nuts from the big-end caps, then remove the caps with their bearing shells. The caps and their connecting rods are numbered 1, 2, 3 and 4 from the timing cover end of the engine. The numbers are adjacent at the big-end cap joint and on the side of the crankcase furthest from the auxiliary shaft. 6 If the bearing shells are to be used again, tape them to their respective big-end caps. 7 Push each connecting rod/piston assembly up the bore and out of the cylinder block. There is one reservation; if a wear ridge has developed at the top of the bores, remove this by careful scraping before trying to remove the piston/rod assemblies. The ridge will otherwise prevent removal or break the piston rings during the attempt. 8 If the connecting rod bearing shells are to be used again, tape the shells to their respective rods. 9 Dismantling the piston/connecting rod is described in Section 18. 14 Push the piston into the bore until the piston ring clamp is against the cylinder block and then tap the crown of the piston lightly to push it out of the ring clamp and into the bore (photo). 15 Oil the crankshaft journal and fit the big-end of the connecting rod to the journal. Fit the big-end cap and nuts, checking that the cap is the right way round (photo). 16 Tighten the big-end nuts to the specified torque. The correct torque is important as the nuts have no locking arrangement. After tightening each big-end, check the crankshaft rotates smoothly (photo). 17 Refit the oil pick-up pipe, the cylinder head, oil pump and sump pan, all as described earlier. 18 Refill the engine with oil and coolant. Refitting 1 The engine complete with transmission should be removed by lowering it to the floor and withdrawing it from under the front of the car which will have been raised to provide adequate clearance. of the bonnet and then with the help of an assistant to support its weight unbolt and remove the bonnet to a safe place. 3 Disconnect the battery negative lead. 4 Drain the cooling system and the engine and transmission oils. 5 Remove the air cleaner. 6 From the rear of the alternator disconnect the electrical leads. 7 Disconnect the leads from the starter motor, oil pressure and coolant temperature switches, also the oil temperature switch. 8 Disconnect the LT lead from the distributor and the HT lead from the ignition coil. 9 Disconnect the clutch cable from the release lever at the transmission. Also disconnect the speedometer drive cable (knurled ring). 10 Pull the leads from the reversing lamp switch. 11 Disconnect all coolant hoses from the engine. Also disconnect the brake servo hose from the intake manifold. 12 Disconnect the choke and throttle controls from the carburettor. 13 Disconnect the inlet hose from the fuel pump and plug the hose. 14 Disconnect the fuel return hose from the carburettor. 15 Disconnect the coolant hoses from the carburettor throttle block. 16 Raise the front of the car and remove the front roadwheels. 17 Unscrew and remove the driveshaft to hub nuts. These are very tight and a long knuckle bar will be required when unscrewing them. Have an assistant apply the brake pedal hard to prevent the hub from turning. 18 Working under the car, remove the inner wing protective shields and then disconnect the exhaust downpipe from the manifold. 19 Disconnect the exhaust pipe sections by removing the socket clamp just forward of the rear axle beam. Remove the front section. 20 Disconnect the forward ends of the gearchange rods by prising their sockets from the ballstuds. 21 Unscrew the nuts on the steering tie-rod end balljoints and then using a suitable “splitter” tool, separate the balljoints from the steering arms. 22 Unbolt the front brake hose support clips 10 Fit the new shells into the connecting rod and caps, ensuring the surfaces on which the shells seat, are clean and dry. 11 Check that the piston ring gaps are evenly spaced at 120º intervals. Liberally oil the rings and the cylinder bores. 12 Fit a piston ring clamp to compress the rings. 13 Insert the piston/connecting rod into the cylinder bore, checking that the rod assembly is correct for that particular bore. The cap and rod matching numbers must be furthest away from the auxiliary shaft (Fig. 1.31). 33 Engine mountings renewal 1 1 Three engine/transmission flexible mountings are used. 2 To renew a mounting, support the weight of the engine/transmission on a hoist or jack and unbolt and remove the mounting. 3 In the unlikely event of all three mountings requiring renewal at the same time, only disconnect them and renew them one at a time. 34 Engine - method of removal 35 Engine/transmission removal and separation 3 1 Open the bonnet, disconnect the windscreen washer tube. 2 Mark the hinge positions on the underside 1 1•28 1116 cc and 1301 cc engine from the suspension struts and then remove the bolts which secure the hub carriers to the U-clamps at the base of the suspension struts. 23 Pull the tops of the hub carriers down and then outwards and push the driveshafts from them. 24 Unbolt the driveshaft inboard boot retainers and then remove the driveshafts from the transmission. 25 Support the engine on a hoist or use a trolley jack under the engine/transmission. Remove the bottom mounting and then the upper left and right-hand ones. 26 Lower the power unit to the floor by pushing it to the left-hand side to clear the right-hand mounting bracket and then swivel the gearbox towards the rear of the car. Withdraw the engine/transmission from under the car. 27 External dirt and grease should now be removed using paraffin and a stiff brush or a water-soluble solvent. 28 Unbolt and remove the engine mounting brackets and the starter motor. 29 Unbolt and remove the cover plate with the gearchange ball stud strut from the lower front face of the flywheel housing. 30 With the engine resting squarely on its sump pan, unscrew the flywheel housing connecting bolts, noting the location of any lifting lugs and hose and wiring clips. 31 Support the weight of the transmission and withdraw it in a straight line from the engine. 36 Engine - dismantling (general) Refer to Section 14, Part 2. 37 Engine ancillary components - removal Refer to Section 15, Part 2 and also remove the intake manifold. 38 Engine complete dismantling 3 1 Have the engine resting squarely and supported securely on the work surface. 2 Unbolt and remove the timing belt cover. 3 Grip the now exposed timing belt with the hands and loosen the camshaft sprocket. 4 Release the timing belt tensioner pulley centre bolt, then slip the belt from the pulley and sprockets to remove it. Note which way round the belt is fitted, usually so that the lettering on the belt can be read from the crankshaft pulley end of the engine. 5 Remove the camshaft sprocket. 6 Unbolt and remove the camshaft timing belt cover backing plate. 7 Unbolt and remove the camshaft carrier cover. 8 Unbolt the camshaft carrier and lift it off very slowly, at the same time pushing the cam followers and their shims down with the fingers securely onto their respective valve springs. It is easy to remove the camshaft carrier too quickly with some of the cam followers stuck in it and as the carrier is lifted away, the cam followers will fall out. If this happens, the valve clearances will be upset as the cam followers and shims cannot be returned, with any certainty, to their original positions. Keep the cam followers and shims in their originally fitted order. 9 Unscrew and remove the cylinder head bolts and nuts, grip the manifold, rock the head and remove the complete cylinder head/manifold/carburettor assembly. Remove and discard the cylinder head gasket. 10 Unbolt the coolant pump from the side of the cylinder block and remove it complete with coolant distribution pipe. Remove the crankcase breather. 11 Remove the distributor/oil pump driveshaft. This is simply carried out by inserting a finger into the hole vacated by the distributor and wedging it in the hole in the end of the driveshaft. Lift the shaft out of mesh with the auxiliary shaft. Where the distributor is driven by the camshaft, a cover plate retains the oil pump driveshaft in position. 12 Unbolt and remove the sprocket from the end of the auxiliary shaft. The sprocket is held to the shaft with a Woodruff key. 13 Unbolt the auxiliary shaft retainer and withdraw the shaft from the crankcase. 14 Unscrew and remove the crankshaft pulley nut. This is very tight and the flywheel starter ring gear will have to be jammed with a cold chisel or a suitably bent piece of steel to prevent the crankshaft rotating. 15 Withdraw the crankshaft sprocket, which is located by the Woodruff key. 16 Unbolt the front engine mounting bracket from the cylinder block, together with the timing belt cover screw anchor bush. Unbolt and remove the timing belt tensioner pulley. 17 Unscrew the flywheel securing bolts. The starter ring gear will again have to be jammed to prevent the crankshaft rotating as the bolts are unscrewed. Mark the flywheel position in relation to the crankshaft mounting flange, then remove it. 18 Unbolt the front and rear crankshaft oil seal retainer bolts from the crankcase and the sump. Remove the oil seal retainers. 19 Turn the engine on its side, extract the remaining sump bolts and remove the sump. If it is stuck, try tapping it gently with a soft-faced hammer. If this fails, cut all round the sump-to-gasket flange with a sharp knife. Do not try prising with a large screwdriver; this will only distort the sump mating flange. 20 With the sump removed, unbolt and remove the oil pump. 21 Grip the oil pick-up pipe and twist or rock it from its hole in the crankcase. It is an interference fit in the hole. 22 Remove the piston/connecting rods as described in Section 32. 23 Before unbolting the main bearing caps, note that they are marked with one, two, three or four notches. No. 5 main bearing cap is unmarked. Note that the notches are nearer the auxiliary shaft side. 24 Unbolt and remove the main bearing caps. If the bearing shells are to be used again, tape them to their respective caps. The bearing shell at the centre position is plain, the others have a lubricating groove. 25 Carefully, lift the crankshaft from the crankcase, noting the thrust washers at No. 5 main bearing. These control the crankshaft endfloat. 39.2 Valve spring compressor and split collets 39.4A Valve spring cap 39 Cylinder head - dismantling and decarbonising 4 1 The operations are similar to those described for the ohv engine in Section 17 in respect of decarbonising and valve grinding. 2 To remove a valve, use a valve spring compressor to compress the first valve and then extract the split collets (photo). 3 Release the valve spring compressor. 4 Withdraw the valve spring cap and the double valve springs (photos). 5 Remove the valve (photo). 1116 cc and 1301 cc engine 1•29 39.4B Double valve springs 39.5 Removing a valve 6 Remove the spring seat (photo). 7 Discard the valve stem oil seal and fit a new one (photo). 8 Remove the remaining valves in a similar way and keep the components in their originally fitted sequence. 9 Reassembly is a reversal of removal. Refit the components to their original positions, but renew the valve springs if their free length is less than that of a new spring or if the springs have been in operation for more than 80 000 km (50 000 miles). 10 The original valve clearance adjusting shims will no longer provide the correct clearances if the valves have been ground in or the seats recut. Only where dismantling of a valve was carried out to renew a spring is there any purpose in returning the shims to their original locations. Try to obtain the loan of eight thin shims from your dealer and insert them into the tappets (cam followers) before assembling the cam followers to the carrier, where they should be retained with thick grease (photo). 11 Fit the camshaft carrier, complete with cam followers and shims to the cylinder head. 12 Adjust the valve clearances as described in Section 26. 40 Examination and renovation 4 1 The procedures are similar to those described in Section 18 covering the following: Cylinder block and crankcase Crankshaft and bearings Pistons and piston rings Flywheel 2 The following additional items must also be examined. Oil pump 3 Carefully, clamp the pump housing in a vice, shaft downwards. 4 Take off the pump cover, with the suction pipe. This will release the oil pressure relief valve inside. Also inside is a filter. 5 Remove the internal cover plate. 39.6 Valve spring seat 1 39.7 Valve stem oil seal 6 Take out the driveshaft and the gears. 7 Clean and examine all the parts. Measure the clearances against the Specifications. The end clearance is measured by putting a straight-edge across the cover face. 8 The oil pump should only need replacements after very long mileage, when the rest of the engine is showing great signs of wear. 9 The length of a new gear can be measured against the old gear to see if a new gear will restore the end clearance to the Specifications. Otherwise the housing must be changed. 10 The driven gear shaft is mounted in the housing with an interference fit. If there is any slackness, a new housing (which will come with shaft fitted) must be used. 11 The oil pump shares its drive with the distributor. Camshaft, cam followers and shims 12 The camshaft journals and cams should be smooth, without grooves or scores. 13 Wear in the camshaft carrier bearings can only be rectified by renewal of the carrier. 14 Cam follower wear is usually very small and when they show slackness in their bores, it is probably the light alloy of the camshaft carrier which has worn. 15 Always measure the thickness of the valve clearance shims using a metric micrometer. Any grooving or wear marks in the shims should be rectified by renewal with ones of similar thickness. 39.10 Cam followers fitted to camshaft carrier Auxiliary shaft 16 The shaft journals, the fuel pump eccentric, and the drivegear for the distributor and oil pump should be smooth and shiny. If not, the shaft will have to be renewed. 17 The bushes should still be tight in the cylinder block, their oil holes lined up with those in the block. 18 Measure the bearing clearance. If excessive, the bushes will have to be renewed. They are a press fit, and require reaming with a special reamer after fitting. This is a job best done by a Fiat agent with the special tools. 19 Ensure the new bushes are fitted with the oil holes lined up. 20 Also check the driven gear and its bush. 21 It is recommended a new oil seal is fitted in the endplate. Hold the shaft in a vice, and remove the pulley. Fit the new oil seal in the endplate, lips inwards. Timing belt tensioner 22 Check the bearing revolves smoothly and freely, and has no play. Do not immerse it in cleaning fluid, as it is partially sealed. Wipe the outside, and then smear in some new general purpose grease. 23 The action of the spring will have been felt when the belt was taken off. It should be cleaned, and oiled, to prevent seizure through dirt and rust. 24 Note the circlip on the engine right-hand mounting bracket. This retains the timing belt tensioner plunger. 1•30 1116 cc and 1301 cc engine 42.1 Main bearing shells 42.2 Crankshaft thrust washers 42.3 Lowering crankshaft into position blades will serve as a reasonable alternative. The difference between the two dimensions (feeler blades) or the total movement of the crankshaft (dial gauge) should be within the specified tolerance. If it is not, the thrust washers at No. 5 main bearing will have to be changed for thicker ones; this will require taking out the crankshaft again to reach them. 7 Fit new oil seals to the retainers and, using new gaskets, bolt the retainers to the front and rear ends of the crankshaft, having first filled the oil seal lips with grease (photos). 1 Fit the bearing shells to their crankcase seats and to their caps. The seatings and backs of the shells must be spotlessly clean, otherwise tight spots will occur when the crankshaft is fitted. The centre bearing shell is plain (photo). 2 Fit the thrust washer halves to their locations at No. 5 bearing, noting that the oil grooves in the washers face outwards (photo). 3 Oil the surfaces of the bearing shells liberally and lower the crankshaft into position (photo). 4 Fit the main bearing caps to their correct locations, the correct way round (numerical chisel marks towards the auxiliary shaft). The rear cap is unmarked. Tighten the cap bolts to the specified torque (photos). 5 Check that the crankshaft rotates smoothly and freely. 6 At this stage, the crankshaft endfloat should be checked. Prise the crankshaft fully in one direction and measure the gap between the machined face of the flywheel mounting flange and the crankcase. Now push the shaft in the opposite direction and measure again. Ideally, a dial gauge should be used for these measurements, but feeler 42.4A Number one main bearing cap 42.4B Tightening a main bearing cap bolt 42.7A Removing oil seal from carrier 42.7B Front oil seal carrier 42.7C Rear oil seal carrier 42.9 Fitting the auxiliary shaft 41 Engine - reassembly (general) Refer to Section 19, Part 2. 42 Engine complete reassembly 4 Crankshaft and main bearings Pistons/connecting rods 8 The refitting operations are described in Section 32. Auxiliary shaft 9 Lubricate the auxiliary shaft bearings and fit the shaft into the crankcase (photo). 10 Fit a new seal to the endplate and fit the 1116 cc and 1301 cc engine 1•31 42.10A Auxiliary shaft end plate and gasket 42.10B Tightening auxiliary shaft end plate bolt 42.11 Tightening camshaft sprocket bolt. Note sprocket locking device plate to the crankcase, using a new gasket (photos). 11 Fit the belt sprocket and partially tighten its bolt. Then, using an oil filter strap wrench or similar device to hold the sprocket against rotation, tighten the bolt to the specified torque. Take care not to damage the teeth of the sprocket, which is of fibre construction (photo). 14 Fit the sump (using a new gasket) and tighten the securing screws to the specified torque. Note the reinforcement washers (photo). 15 Insert the oil pump/driveshaft into the distributor hole. This does not have to be specially positioned as the distributor is splined to the shaft and can be set by moving its location in the splines (refer to Chapter 4) (photo). 16 Push the breather into its crankcase recess and tighten its securing bolt (photos). the bolt holes have unequal distances between them, it is possible to fit the flywheel in one of two alternative positions at 180º difference. Therefore if the original flywheel is being refitted, align the marks made before removal. 18 If a new flywheel is being fitted, or if alignment marks were not made before dismantling, set No. 1 position at TDC (crankshaft front Woodruff key pointing vertically). Fit the flywheel to its mounting flange so that its timing dimple is uppermost and in alignment with the relative position of the TDC mark on the flywheel housing inspection window. 19 Insert the bolts and tighten them to the specified torque, jamming the ring gear to Oil sump, sump pan and breather 12 Fit the oil drain pipe by tapping it into place, squarely in its hole in the crankcase. Tighten its retaining bolt (photo). 13 Bolt up the oil pump, using a new gasket at its mounting flange (photo). Flywheel, crankshaft sprocket and pulley 17 Make sure that the flywheel-to-crankshaft mounting flange surfaces are clean. Although 42.12 Tightening oil drain pipe bolt 42.14 Tightening sump pan bolt 42.13 Locating oil pump and gasket 42.15 Fitting oil pump driveshaft 42.16A Crankcase breather seal 42.16B Crankcase breather and retaining bolt 1 1•32 1116 cc and 1301 cc engine 42.19 Tightening flywheel bolts 42.20 Fitting crankshaft timing belt sprocket 42.21 Crankshaft pulley and nut prevent the flywheel turning. Fit the engine endplate (photo). 20 Fit the timing belt sprocket to the front end of the crankshaft (photo). 21 Fit the crankshaft pulley and the nut; tighten it to the specified torque, again jamming the starter ring gear to prevent the crankshaft from rotating (photo). complete with the tensioner plunger to provide spring pressure to the belt pulley (photos). 2 Fit the coolant pump and thermostat housing (Chapter 2). 3 Fit the alternator and tension the drivebelt (Chapters 9 and 2). 4 Fit the distributor (Chapter 4). 5 Fit the fuel pump (Chapter 3). 6 Fit the clutch (Chapter 5). 7 Fit a new oil filter cartridge (Section 2 of this Chapter). Cylinder head 22 Refitting is described in Section 29. Camshaft carrier and camshaft Valve clearances 25 Check the valve clearances as described in Section 26. 26 Using new gaskets, bolt on the camshaft carrier cover plate and the inlet and exhaust manifolds using new gaskets. Fit the exhaust manifold hot air collector plate (photo). 27 Locate the engine rear plate on its dowels by sliding it behind the flywheel (photo). 23 Refitting is described in Section 27. Timing belt and tensioner 24 Refitting is described in Section 28, but make sure that the belt cover rear plate is bolted into position. If the engine mounting bracket was removed, bolt it into position 43 Engine ancillaries - refitting 1 Bolt on the carburettor (Chapter 3). 44 Engine/transmission reconnection and refitting 3 1 Offer the transmission to the engine making sure that the clutch has been centralised as described in Chapter 5 (photo). 42.24A Belt cover rear plate 42.24B Belt cover mounting stud 42.24C Engine mounting bracket with belt tensioner plunger (arrowed) 42.26 Tightening a camshaft carrier cover nut 42.27 Engine rear plate 44.1 Offering transmission to engine 1116 cc and 1301 cc engine 1•33 44.2 Lifting lug at bellhousing bolt 44.8A Raising engine/transmission into engine compartment 44.8B Left-hand engine mounting 2 Draw the engine and transmission together by screwing in the connecting bolts. Refit lifting lugs and hose and wiring clips (photo). 3 Bolt the lower cover plate to the face of the flywheel housing. 4 Bolt the starter motor into position. 5 Bolt the mounting brackets into place. 6 Place the engine/transmission on the floor ready for raising by hoist or jack into the engine compartment. 7 Raise the car and position it over the engine/transmission. 8 Hoist or jack the power unit upwards until the left and right-hand mountings can be connected (photos). 9 Remove the lifting mechanism and connect the bottom mounting (photos). 10 Connect the inboard ends of the driveshafts with the transmission and the outboard ends with the hub carriers. 11 Reconnect the hub carriers with the clamps at the base of the suspension struts. Tighten the fixing bolts to the specified torque. 12 Bolt the brake flexible hose support clips to the suspension struts. 13 Reconnect the tie-rod end balljoints tightening the nuts to the specified torque. 14 Reconnect the gearchange rods. The easiest way to do this is to force the sockets onto the ball studs using a pair of self-locking grips (photo). 15 Refit the exhaust system and reconnect the downpipe to the manifold (photo). 16 Screw on the driveshaft nuts and tighten them to the specified torque. Have an assistant apply the brake pedal hard to prevent the driveshaft from turning. 17 Refit the front roadwheels and lower the car to the floor. 18 Reconnect the carburettor fuel and coolant hoses. 19 Unplug the fuel hose and connect it to the pump. 20 Reconnect the choke and throttle controls to the carburettor. 21 Reconnect the coolant and heater hoses 44.8C Right-hand engine mounting brackets 44.8D Right-hand mounting bolted up 44.9A Engine/transmission lower mounting 44.9B Lower mounting attachment bolts 44.14 Connecting a gearchange rod ball cup 44.15 Exhaust downpipe flange nuts 1 1•34 1116 cc and 1301 cc engine 44.21A Heater hose at manifold 44.21B Brake servo hose at manifold 44.22A Reversing lamp switch on transmission to the engine. Also reconnect the brake servo hose to the intake manifold (photos). 22 Reconnect the leads to the reversing lamp switch. Reconnect the transmission earth lead (photos). 23 Reconnect the clutch cable and adjust as described in Chapter 5. 24 Reconnect the speedometer drive cable to the transmission and tighten the knurled retaining ring. 25 Reconnect the low tension lead to the distributor and the high tension lead to the ignition coil. 26 Reconnnect the electrical leads to the starter motor, the oil pressure and temperature switches and the coolant temperature switch. 27 Connect the leads to the alternator. 28 Refit the air cleaner. 29 Refill the cooling system. Refill the engine with oil. 30 Reconnect the battery. 31 Refit the bonnet and connect the windscreen washer tube. 32 Fit the inner wing protective shields (photo). 1 If new bearings and rings have been fitted, it is likely that the engine will be stiff to turn so make sure the battery is well charged. 2 Switch on the ignition and check that appropriate warning lights come on. 3 Start up the engine. If it refuses to start, refer to the “Fault Finding” Section in the Reference section of this Manual. 4 Watch the oil pressure warning light and alternator charging indicator light. If there is no charge or if the oil pressure warning light does not go out after a second or two, having had time to fill the new oil filter, switch off and recheck. 5 If the warning lights go out, set the engine to run on fast idle and check the engine for leaks. 6 Check the coolant level; it will probably go down as air locks are filled. 7 Keep the engine running at a fast idle and bring it up to normal working temperature. As the engine warms up, there will be some odd smells and smoke from parts getting hot and burning off oil deposits. 8 When the engine running temperature has been reached, adjust the idling speed, as described in Chapter 3. Check and, if necessary, adjust the ignition timing using a stroboscope (see Chapter 4). 9 Stop the engine and wait a few minutes; check to see if there are any coolant or oil leaks. 10 Road test the car to check that the engine is running with the correct smoothness and power. If it does not, refer to “Fault finding” in the Reference section of this Manual. Do not race the engine. If new bearings and/or pistons and rings have been fitted, it should be treated as a new engine and run it at reduced speed for at east 800 km (500 miles). 11 After 800 km (500 miles) change the engine oil and filter. 44.26B Coolant temperature switch 44.32 Inner wing protective shield 44.22B Transmission earth lead 44.26A Oil pressure warning switch 45 Engine - initial start-up after major overhaul 4 All engines 1•35 Fault finding - all engines Note: When investigating starting and uneven running faults, do not be tempted into snap diagnosis. Start from the beginning of the check procedure and follow it through. It will take less time in the long run. Poor performance from an engine in terms of power and economy is not normally diagnosed quickly. In any event, the ignition and fuel systems must be checked first before assuming any further investigation needs to be made. Engine fails to turn when starter operated Difficult starting when cold m m m m m m m m m m m m m m m Battery discharged Battery terminals loose or corroded Battery earth to body defective Engine/transmission earth strap broken or loose Disconnected or broken wire in starter circuit Ignition/starter switch defective Starter motor or solenoid defective (see Chapter 9) Major mechanical failure (seizure) or long disuse (piston rings rusted to bores) Engine turns and fails to start m m m m m m m m m m m m m m m m m m m m m m m m Battery discharged Battery terminals loose or corroded Battery or engine earth strap loose Starter motor connections loose Oil in engine/transmission too thick Starter motor defective Vapour lock in fuel line (in hot conditions or at high altitude) Blocked float chamber needle valve Fuel pump filter blocked Choked or blocked carburettor jets Faulty fuel pump Fuel tank empty Other fuel system fault (see Chapter 3) Shorted or disconnected low tension leads Dirty, incorrectly set, or pitted contact breaker points Contact breaker point spring earthed or broken Faulty condenser Defective ignition switch Faulty coil Damp or dirty HT leads, distributor cap or plug bodies Broken, loose or disconnected LT leads Ignition leads connected wrong way round Other ignition fault (see Chapter 4) Valve timing incorrect (after rebuild) Engine fires but will not run m m m m Insufficient choke (cold engine) Fuel starvation or tank empty Ignition fault (see Chapter 4) Other fuel system fault (see Chapter 3) Engine stalls and will not restart m m m m m m m m m m Too much choke allowing too rich a mixture to wet plugs Float damaged or leaking or needle not seating Float lever incorrectly adjusted Ignition failure - sudden Ignition failure - misfiring precedes total stoppage Ignition failure - in severe rain or after traversing water splash No petrol in petrol tank Petrol tank breather choked Sudden obstruction in carburettor Water in fuel system Engine slow to warm up m m m m Choke linkage maladjusted Air cleaner temperature control unit defective Thermostat stuck open (see Chapter 2) Other fuel system fault (see Chapter 3) Insufficient choke Fouled or incorrectly gapped spark plugs Damp or dirty HT leads, distributor cap or spark plug bodies Dirty or maladjusted contact breaker points Other ignition fault or timing maladjustment (see Chapter 4) Fuel system or emission control fault (see Chapter 3) Poor compression (may be due to incorrect valve clearances, burnt or sticking valves, blown head gasket, worn or damaged pistons, rings or bores) m Incorrect valve timing (after rebuild) Difficult starting when hot m m m m m Incorrect use of manual choke Fuel line vapour lock (especially in hot weather or at high altitudes) Incorrect ignition timing Other fuel system or emission control fault (see Chapter 3) Poor compression (see above) Engine lacks power m m m m m m m m m m m m m m m m m m m m m m m m Ignition timing incorrect Contact breaker points incorrectly gapped Incorrectly set spark plugs Dirty contact breaker points Distributor automatic advance and retard mechanisms not functioning correctly Other ignition system fault (see Chapter 4) Air cleaner choked Carburation too rich or too weak Fuel filter blocked Air filter blocked Faulty fuel pump giving top and fuel starvation Other fuel system fault (see Chapter 3) Poor compression Valve clearances incorrect Carbon build-up in cylinder head Sticking or leaking valves Weak or broken valve springs Worn valve guides or stems Worn pistons and piston rings Burnt out valves Blown cylinder head gasket (accompanied by increase in noise) Worn pistons and piston rings Worn or scored cylinder bore Brakes binding Engine misfires throughout speed range m m m m m m m m Defective or fouled spark plug Loose, cracked or defective HT lead Maladjusted, sticking or burnt valves Ignition timing incorrect Blown head gasket Fuel contaminated Other ignition fault (see Chapter 4) Other fuel system fault (see Chapter 3) Poor engine braking m High idle speed m Other fuel system fault (see Chapter 3) m Low compression 1 1•36 All engines Engine idles roughly m Mixture too weak m Air leak in carburettor m Air leak at inlet manifold to cylinder head, or inlet manifold to carburettor m Carburettor incorrectly adjusted m Other fuel system fault (see Chapter 3) m Low tension leads on coil loose m Low tension lead to distributor loose m Dirty, incorrectly set, or pitted contact breaker points m Tracking across inside of distributor cover m Faulty coil m Ignition leads loose m Spark plugs fouled or incorrectly gapped. m Ignition timing incorrect m Other ignition fault (see Chapter 4) m Incorrect valve clearances m Widely differing cylinder compressions m Low battery voltage (charging fault) m Battery leads loose on terminals m Battery earth strap loose on body attachment point m Engine earth lead loose Pre-ignition (pinking) during acceleration m m m m m m m m Incorrect grade of fuel being used Ignition timing over-advanced Other ignition fault (see Chapter 4) Engine overheated Excessive carbon build-up Fuel system fault (see Chapter 3) Valve timing incorrect (after rebuild) Mixture too weak Engine runs on after switching off m m m m m Idle speed too high Incorrect type of spark plug Overheating Excessive carbon build-up Other emission control fault (see Chapter 3) Oil being lost due to leaks m m m m m Leaking oil filter gasket Leaking rocker cover gasket Leaking timing gear cover gasket Leaking sump gasket Loose sump plug Low oil pressure (verify accuracy of sender before dismantling engine!) m m m m m m m m Oil level low Engine overheating Incorrect grade of oil in use Oil filter clogged or bypass valve stuck Pressure relief valve stuck or defective Oil pick-up strainer clogged or loose Main or big-end bearings worn Oil pump worn or mountings loose Excessive oil consumption m m m m m m Overfilling Leaking gaskets or drain plug washer Valve stem oil seals worn, damaged or missing after rebuild Valve stems and/or guides worn Piston rings and/or bores worn Piston oil return holes clogged Oil contaminated with water m Excessive cold running m Leaking head gasket m Cracked block or head Oil contaminated with fuel m Excessive use of choke m Worn piston rings and/or bores Unusual mechanical noises m Unintentional mechanical contact (eg fan blade) m Worn drivebelt m Worn valvegear (tapping noises from top of engine) or incorrect clearance m Peripheral component fault (generator, coolant pump) m Worn big-end bearings (regular heavy knocking, perhaps less under load) m Worn main bearings (rumbling and knocking, perhaps worsening under load) m Small-end bushes or gudgeon pins worn (light metallic tapping) m Piston slap (most noticeable when engine cold) m Worn timing chain and gears (rattling from front of engine) m Worn crankshaft (knocking, rumbling and vibration) 2•1 Chapter 2 Cooling and heating systems For modifications, and information applicable to later models, see Supplement at end of manual Contents Coolant mixtures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Coolant pump - removal, overhaul and refitting . . . . . . . . . . . . . . . . 9 Cooling system - draining, flushing and refilling . . . . . . . . . . . . . . . . 2 Cooling system sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Description and maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Drivebelt - tensioning and renewal . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Fault finding - cooling and heating . . . . . . . . . . . . See end of Chapter Heater - dismantling, overhaul and reassembly . . . . . . . . . . . . . . . . Heater unit - removal and refitting . . . . . . . . . . . . . . . . . . . . . . . . . . Heating and ventilation system - description . . . . . . . . . . . . . . . . . . Radiator - removal and refitting . . . . . . . . . . . . . . . . . . . . . . . . . . . . Radiator fan thermostatic switch - removal, checking and refitting . Radiator fan - removal and refitting . . . . . . . . . . . . . . . . . . . . . . . . . Thermostat - removal, testing and refitting . . . . . . . . . . . . . . . . . . . . 13 12 11 7 5 6 4 Degrees of difficulty Easy, suitable for novice with little experience 1 Fairly easy, suitable for beginner with some experience 2 Fairly difficult, suitable for competent DIY mechanic 3 Difficult, suitable for experienced DIY mechanic 4 Very difficult, suitable for expert DIY or professional 5 Specifications System type 2 ........................................... “No loss” with radiator and integral expansion tank. Electric cooling fan, belt-driven coolant pump, thermostat on cylinder head General Radiator fan cuts in . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Radiator fan switches off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Thermostat opens: 903 cc engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1116 cc and 1301 cc engines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fully open: 903 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1116 cc and 1301 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Expansion tank pressure cap rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90 to 94ºC (194 to 201ºF) 85 to 89ºC (185 to 192ºF) 85 to 89ºC (185 to 192ºF) 83 to 87ºC (181 to 188.6ºF) 100ºC (212ºF) 95ºC (203ºF) 0.78 bar (11 lbf/in2) Coolant Capacity: 903 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1116 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1301 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Torque wrench settings Temperature sender switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Coolant pump mounting bolts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Alternator adjuster and mountings nuts . . . . . . . . . . . . . . . . . . . . . . . . . 1 Description and maintenance 1 1 The cooling system consists of a front-mounted radiator with built-in expansion tank, a coolant pump (belt-driven from the crankshaft pulley) and a thermostaticallycontrolled electric cooling fan. 2 In order to assist rapid warm-up, a 4.6 litre (8.1 pint) 6.0 litre (10.6 pint) 6.2 litre (10.9 pint) Ethylene glycol based antifreeze Nm 49 34 49 thermostat is located in a housing at the left-hand end of the cylinder head. The hose connections to the thermostat housing vary according to model. 3 The heater is supplied with coolant from the engine and incorporates a matrix and blower with the necessary controls. 4 The throttle valve plate block of the carburettor is coolant-heated as a means of improving fuel atomisation. 5 Maintenance is minimal as in theory no coolant should ever be lost from the lbf ft 36 25 36 expansion tank. Regularly check that the coolant level is between 50.0 and 70.0 mm (1.97 and 2.8 in) above the MIN mark on the tank with the engine cold. The need for regular topping up will indicate a leak somewhere in the system. If one cannot be found suspect an internal leak in the engine although this is usually confirmed by a rise in the engine oil level and water on the dipstick (photo). Any topping-up should be done using an antifreeze mixture (see Section 3), not plain water. 2•2 Cooling and heating systems 1.5 Expansion tank cap dribble out of the hole in the heater hose. Screw in the plug. 11 Top up the expansion tank to the specified level and screw on the tank cap. 12 Start the engine and run it until the cooling fan cuts in. Switch off, allow to cool and top up if necessary to the specified mark on the expansion tank. Fig. 2.1 Cooling system on 903 cc engine (Sec 1) 6 Avoid unscrewing the expansion tank cap when the engine is hot, but if this must be done, cover the cap with a cloth to avoid scalding by escaping steam. 7 Periodically, check the condition of all coolant hoses and tighten the clips. 1 Set the heater temperature lever to maximum. 2 Unscrew the cap from the expansion tank. 3 Disconnect the radiator bottom hose and unscrew the cylinder block drain plug (1116 cc and 1301 cc engines) and allow the coolant to drain. Refer to photo 29.21B, page 64. 4 If the system is in good condition with no sign of rust or dirt in the drained coolant, then it may be refilled immediately. If the system has been neglected and the antifreeze has not been regularly renewed and there is evidence of rust and sediment in the drained liquid then flush the system through with a cold water hose. 5 If the radiator should appear to be clogged, it may be necessary to remove it (Section 7) invert it and reverse flush it using a cold water hose. If, after a reasonable period the water still does not run clear, the radiator should be flushed with a good proprietary cleaning system. Extensive damage should be repaired by a specialist or the unit exchanged for a new or reconditioned radiator. 6 Reconnect the bottom hose and screw in the drain plug. 7 Remove the plug (B) (Fig. 2.2) from the bleed hole in the heater hose. 8 Remove the plug (D) (Fig. 2.3) from the bleed hole in the expansion tank. 9 Pour antifreeze mixture slowly into the filler neck of the expansion tank until it is seen to come out of the expansion tank plug hole. Screw in the plug. 10 Add further coolant until it is seen to Fig. 2.2 Plug (B) in heater hose (Sec 2) Fig. 2.3 Plug (D) in expansion tank (Sec 2) 2 Cooling system - draining, flushing and refilling 1 3 Coolant mixtures 1 In cold climates, antifreeze is needed for two reasons. In extreme cases, if the coolant in the engine freezes solid it could crack the cylinder block or head. But also in cold weather, with the circulation restricted by the thermostat, and any warm water that is getting to the radiator being at the top, the bottom of the radiator could freeze, and so block circulation completely, making the coolant trapped in the engine boil. 2 The antifreeze should be mixed in the proportions advocated by the makers, according to the climate. There are two levels of protection. The first cuts risk of damage, as the antifreeze goes mushy before freezing. The second, valid all year round, is the corrosion protection it offers - see below. The normal proportion in a temperate climate to provide maximum protection against freezing and corrosion is 50% antifreeze and 50% water. 3 Use only ethylene glycol based antifreeze and preferably soft water. 4 Antifreeze should be left in through the summer. It has an important secondary function, to act as an inhibitor against corrosion. In the cooling system are many different metals, in particular the aluminium of the cylinder head. In contact with the coolant this sets up electrolytic corrosion, accentuated by any dirt in the system. This corrosion can be catastrophically fast. 5 After about two years, the effectiveness of the antifreeze’s inhibitor is used up. It must then be discarded, and the system refilled with new coolant. 6 In warm climates free from frost, an Cooling and heating systems 2•3 4.2 Thermostat housing 4.4 Fitting thermostat housing (1116 cc engine) 7.3A Radiator top hose inhibitor should be used. Again, a reputable make giving full protection must be chosen and renewed every two years. Inhibitors with dyes are useful for finding leaks, and on some makes the dye shows when the inhibiting ability is finished. 3 To remove the switch, disconnect the leads from the terminals and unscrew the switch. 4 Connect a test bulb and battery across the switch terminals and then immerse the sensing part of the switch in a container of water. Heat the water and, using a thermometer, check the temperature of the water when the bulb lights up, indicating the switch is functioning. The switch should operate at approximately 194ºF (90ºC). Allow the water to cool and check that the switch cuts out at 185ºF (85ºC). Renew a faulty switch. 5 Refitting of the switch is the reverse of the removal procedure. Always fit a new O-ring on the switch. 3 Disconnect the coolant hoses from the radiator (photos). 4 Release the clips from the top of the radiator and withdraw the radiator complete with fan from the engine compartment (photos). 5 The radiator is of combined plastic/metal construction and any repair should be left to specialists. In an emergency however, minor leaks from the radiator may be cured by using a radiator sealant with the radiator in situ. 6 Refitting is a reversal of removal. Fill the cooling system as described in Section 2. 4 Thermostat removal, testing and refitting 1 1 The thermostat assembly is mounted on the flywheel end of the cylinder block. 2 Unfortunately, the thermostat/housing is a complete unit and failure of the thermostat will necessitate the purchase of the complete component (photo). 3 If the thermostat/housing is removed from the engine, it can be suspended in water and the water heated to check out its opening temperature. Movement of the thermostat valve can be observed to some extent through the openings in the housing. 4 When refitting, always use a new gasket at its mounting face (photo). 6 Radiator fan removal and refitting 1 8 Drivebelt tensioning and renewal 1 1 Drain the cooling system. 2 If the thermostatic switch is being removed because the fan is not operating and the switch is suspect, check the fan fuse first, before removing the switch. 1 Drain the cooling system. 2 Disconnect the electrical leads from the radiator fan motor and thermostatic switch. 1 The drivebelt for the alternator and coolant pump is correctly tensioned if it deflects through 10.0 mm (0.39 in) under moderate thumb pressure at the mid point of the longest run of the belt. 2 To tighten the belt, release the mounting and adjuster nuts on the alternator and prise the alternator away from the engine. Tighten the nuts when the belt is taut and then re-check the tension as previously described. Never over-tension a belt or the coolant pump or alternator bearings may be damaged. 3 Check the condition of the belt at regular intervals. If frayed or cracked, renew it in the following way. 4 Release the alternator mounting and adjuster nuts and push the alternator fully in 7.3B Radiator hose to thermostat housing 7.4A Radiator fixing clip 7.4B Removing radiator/fan assembly 5 Radiator fan thermostatic switch - removal, checking and refitting 1 1 Disconnect the electrical leads from the radiator fan motor. 2 Unbolt the fan mounting struts from the radiator and lift the complete assembly away. 3 Refitting is a reversal of removal. 7 Radiator removal and refitting 1 2 2•4 Cooling and heating systems 9.4 Coolant distribution tube at rear of pump towards the engine. Slip the belt off the pulleys. If this is difficult, turn the crankshaft pulley using a spanner on its retaining nut while pressing the belt over the edge of the pulley rim. Use this method to fit the new belt after first having engaged it with the coolant pump and alternator pulley grooves. 5 Tension the belt as previously described. 6 The tension of a new belt should be checked and adjusted after the first few hundred miles of running. 9 Coolant pump - removal, overhaul and refitting 4 Note: The design of the pump differs between the 903 cc and the other two engines, but the removal, overhaul and refitting operations are essentially similar. 1 To gain access to the coolant pump, open the bonnet and remove the air cleaner. 2 Slacken the alternator pivot and adjustment nuts, push the alternator in towards the engine and slip the drivebelt from the coolant pump pulley. Unplug and remove the alternator. Fig. 2.4 Sectional view of 903 cc engine coolant pump (Sec 9) 1 2 3 4 Pump body Pump cover Impeller Connector for hose from outlet to pump 5 Seal 6 Gasket 7 8 9 10 11 Circlip Bearing shoulder washer Inner seal Inner bearing Bearing retainment screw and lock washer 3 Drain the cooling system as previously described. 4 Disconnect the hoses from the coolant pump, also the metal coolant transfer pipe (photo). 5 Unscrew and remove the coolant pump securing bolts, and lift the pump from the engine. Peel away and discard the old gasket. 6 Clean away external dirt. 7 The pump is likely to need overhaul for worn or noisy bearings, or if the gland is leaking. There is a drain hole between the gland and the bearings to prevent contamination of the bearing grease by leaks, and possible damage to the bearings. Gland 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Pump cover Bearing spacer Bearing stop screw Cover nuts Lifting bracket Housing Impeller Gland (seal) Circlip Gasket Shouldered ring Grommets Bearing Pulley Shaft Fig. 2.5 Sectional views of 1116 cc and 1301 cc engine coolant pump (Sec 9) 12 13 14 15 16 17 Spacer Outer seal Outer bearing Lock washer Pulley Pump shaft leaks are usually worse when the engine is not running. Once started, a leak is likely to get worse quickly, so should be dealt with soon. Worn bearings are likely to be noted first due to noise. To check them, the pulley should be rocked firmly, when any free movement can be felt despite the belt. But if the bearings are noisy, yet there is not apparently any free play, then the belt should be removed so the pump can be rotated by hand to check the smoothness of the bearings. 8 Dismantling and assembly of the pump requires the use of a press, and it is preferable to fit a new pump. 9 For those having the necessary facilities, overhaul can be carried out as follows. 10 Remove the retaining nuts and separate the two halves of the pump. 11 The pump shaft is an interference fit in the impeller, bearings, and pulley boss. How the pump is dismantled depends on whether only the gland needs renewing or the bearings as well, and what puller or press is available to get everything apart. 12 Assuming complete dismantling is required, proceed as follows. Supporting it close in at the boss, press the shaft out of the pulley. Pull the impeller off the other end of the shaft. 13 Take out the bearing stop screw. 14 From the impeller end, press the shaft with the bearings out of the cover half of the housing. 15 Press the shaft out of the bearings, take off the spacer, the circlip, and the shouldered ring. 16 Do not immerse the bearings in cleaning Cooling and heating systems 2•5 2 Air is drawn in through the grille at the base of the windscreen. It then passes through the coolant heated matrix when it can then be distributed through selective outlets according to the setting of the control levers. 3 A booster fan is provided for use when the car is stationary or is travelling too slowly to provide sufficient air ram effect. 4 Fresh air outlets are provided at each end and centrally on the facia panel. 9.21 Fitting coolant pump (1116 cc engine) Fig. 2.6 Checking impeller clearance (Sec 9) fluid. They are “sealed”. Liquid will get in, but a thorough clean will be impracticable, and it will be impossible to get new grease in. 17 Check all the parts, get a new gland, two new grommets, (1116 cc and 1301 cc) and a new gasket. Scrape all deposits out of the housing and off the impeller. 18 To reassemble, start by inserting the new grommets (1116 cc and 1301 cc) in the grooves by each bearing. Fit the circlip to the shaft, then the shouldered ring, bearings and spacer. Fit the shaft and bearing assembly into the cover. Fit the stop screw. Press on the pulley. 19 Fit the new gland (seal), seating it in its location in the cover. Press the impeller onto the shaft. The impeller must be put on part way, and then the housing held in place to see how far the impeller must go down the shaft to give the correct clearance, which is 0.8 to 1.3 mm (0.03 to 0.05 in) as shown in Figs. 2.4 and 2.5. 20 The impeller clearance can be checked through the coolant passage in the side of the pump. 21 Refitting is a reversal of the removal process, but use a new flange gasket and tension the drivebelt as described in Section 8 (photo). 22 Refill the cooling system. flux is weakened and the switches open. 5 In the event of a fault developing, before assuming that the cause is the sensor, check all connecting wiring. 11 Heating and ventilation system - description 1 The heater is centrally mounted under the facia and is of fresh air type. 12 Heater unit removal and refitting 1 Drain the cooling system. 2 Disconnect the heater hoses at the engine compartment rear bulkhead. 3 Working within the car under the facia panel, disconnect the leads from the heater blower by pulling the connecting plug apart. 4 If a radio is fitted, disconnect the aerial, earth, speaker and power leads from it. 10 Cooling system sensors 1 A coolant temperature sender switch is located in the cylinder head (above No. 1 spark plug) on 903 cc engines and adjacent to No. 2 spark plug on 1116 cc and 1301 cc engines. 2 The switch operates the coolant temperature gauge and an excessive temperature warning lamp. 3 On some models, a level sensor is screwed into the side of the expansion tank. This sensor consists of a pair of reed switches within a capsule which are kept closed by the strong magnetic flux generated by the hydrostatic force inspired by the action of the coolant against the float. 4 If the coolant level drops then the magnetic A Fresh air inlet flap B Air distribution flap C Coolant valve 1 Fig. 2.7 Heater and ventilation system (Sec 11) D Blower F Control levers E Matrix G Footwell air duct 2 2•6 Cooling and heating systems 12.5 Pulling off heater control lever knob 12.6A Heater control panel screw 12.6B Removing heater control panel escutcheon upper part of the heater casing (photo). 10 Unscrew the mounting nuts which hold the heater to the bulkhead (photo). 11 Lower the heater to the floor, taking care not to allow coolant to spill on the carpet. 12 Refitting is a reversal of removal. Fill the cooling system. 12.8A Heater coolant valve and control cable 5 Pull off the knobs from the control levers (photo). 6 Extract the screws and take off the control indicator plate (photos). Disconnect the leads from the cigar lighter and carefully detach the fibre optic which provides the panel illumination. 7 Unscrew and remove the screws which hold the console to the heater unit and withdraw the console. 8 The control cables can be disconnected from the arms of the control flap valves (photos). 9 Unscrew the single screw from the upper face of the facia panel. This screw secures the 12.8B Heater flap valve cables Fig. 2.8 Extracting heater upper fixing screw (Sec 12) 12.9 Heater upper fixing screw 12.10 Heater lower mounting bolt Fig. 2.9 Control lever platform screw (Sec 13) Fig. 2.10 Withdrawing heater matrix (Sec 13) 13 Heater - dismantling, overhaul and reassembly 1 1 Remove the heater from the car as described in the preceding Section. Cooling and heating systems 2•7 2 The control lever mounting platform can be removed after extracting its fixing screws. 3 The coolant control valve can be removed after extracting its fixing nuts. 4 Unscrew the screws which hold the heater matrix in the casing and then slide the matrix from its location. 5 If the matrix is leaking, do not attempt a repair, but obtain a new one. These are usually obtainable on an exchange basis from radiator repairers. 6 The heater casing can be separated after prising off the clips and removing the bolts. The blower motor/fan can then be lifted out. 7 Reassembly is a reversal of dismantling, but set the cables to give complete range of travel between open and closed positions of the flap valve or coolant valve concerned. 2 Fig. 2.11 Exploded view of heater (Sec 13) Fig. 2.12 Heater control components (Sec 13) 2•8 Cooling and heating systems Fault finding - cooling and heating systems Overheating Loss of coolant m m m m m m m m m m m m m m m m m m Insufficient coolant in system Pump ineffective due to slack drivebelt Radiator blocked either internally or externally Kinked or collapsed hose causing coolant flow restriction Thermostat not working properly Engine out of tune Ignition timing retarded or auto advance malfunction Cylinder head gasket blown Engine not yet run-in Exhaust system partially blocked Engine oil level too low Brakes binding Engine running too cool m Faulty, incorrect or missing thermostat Loose hose clips Hoses perished or leaking Radiator leaking Filler/pressure cap defective Blown cylinder head gasket Cracked cylinder block or head Heater gives insufficient output m m m m Engine overcooled (see above) Heater matrix blocked Heater controls maladjusted or broken Heater control valve jammed or otherwise defective 3•1 Chapter 3 Fuel system For modifications, and information applicable to later models, see Supplement at end of manual Contents Accelerator cable - adjustment and renewal . . . . . . . . . . . . . . . . . . Air cleaner - servicing, removal and refitting . . . . . . . . . . . . . . . . . . . Carburettor - removal and refitting . . . . . . . . . . . . . . . . . . . . . . . . . . Carburettor idle speed and mixture - adjustment . . . . . . . . . . . . . . . Carburettor (Solex C32 DISA 12) - servicing and adjustment . . . . . . Carburettor (Solex C30 - 32 CIC/1) - servicing and adjustment . . . . Carburettor (Solex C32 DISA 11) - servicing and adjustment . . . . . . Carburettor (Weber 30/32 DMTR 90/250) - servicing and adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Carburettor (Weber 32 ICEV 50/250/1) - servicing and adjustment . . Carburettor (Weber 32 ICEV 51/250) - servicing and adjustment . . . 17 2 8 7 13 15 10 14 9 12 Carburettors (Weber 32 ICEE/250 and Solex C32 DISA 14) description and adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Carburettors - general . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Choke control cable - removal and refitting . . . . . . . . . . . . . . . . . . . 18 Description and maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Economy meter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Fault finding - fuel system . . . . . . . . . . . . . . . . . . . See end of Chapter Fuel level transmitter - removal and refitting . . . . . . . . . . . . . . . . . . . 4 Fuel pump - removal and refitting . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Fuel tank - removal and refitting . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Manifolds and exhaust system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Degrees of difficulty Easy, suitable for novice with little experience 1 Fairly easy, suitable for beginner with some experience 2 Fairly difficult, suitable for competent DIY mechanic 3 Difficult, suitable for experienced DIY mechanic 4 Very difficult, suitable for expert DIY or professional 5 3 Specifications System type ........................................... Rear mounted fuel tank, mechanically-operated fuel pump, downdraught carburettor Air cleaner element 903 cc (45) and 1116 cc (55) engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1116 cc (60) and 1299/1301 cc (70) engines . . . . . . . . . . . . . . . . . . . . . Champion W121 Champion W136 Fuel tank Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Octane rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42.0 litre (9.25 gal) Leaded 97 RON minimum (see Supplement for use of unleaded petrol) Fuel filter Champion L101 .............................................. Carburettor - calibration (dimensions in mm) Weber 32 ICEV 50/250/1 Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Venturi . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Auxiliary venturi . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Main jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Air bleed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Emulsion tube . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Idle jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Air idle jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pump jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pump outlet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Superfeed jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Superfeed mixture jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fuel inlet needle valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Anti-syphon device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Idle mixture adjustment hole . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Float setting (fuel level) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Float setting (travel/stroke) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fast idle (throttle valve gap) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Accelerator pump delivery (ten strokes) . . . . . . . . . . . . . . . . . . . . . . . . . 903 cc engine 22 3.5 1.12 1.70 F89 0.47 1.60 0.40 0.40 0.80 2.50 1.50 1.00 1.50 10.5 to 11.0 45.0 0.75 to 0.80 4.0 to 5.5 cc 3•2 Fuel system Solex C32 DISA 11 Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Venturi . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Auxiliary venturi . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Main jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Air bleed jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Emulsion tube . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Idle jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Air idle jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pump jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pump outlet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fuel inlet needle valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Anti-syphon device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Idle mixture adjustment hole . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Float setting (fuel level) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fast idle (throttle valve gap) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Accelerator pump delivery (ten strokes) . . . . . . . . . . . . . . . . . . . . . . . . . 903 cc engine 23 3.4 1.20 1.35 B03 0.525 1.20 0.50 0.45 1.60 2.0 1.10 2.0 to 3.0 0.90 to 1.0 2.5 to 4.5 cc Weber 32 ICEE/250 Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Venturi . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Auxiliary venturi . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Main jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Air bleed jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Emulsion tube . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Idle jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Air idle jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pump jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pump outlet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Superfeed jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Superfeed mixture jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fuel inlet needle valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Anti-syphon device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Idle mixture adjustment hole . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Float setting (fuel level) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fast idle (throttle valve plate gap) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Accelerator pump delivery (ten strokes) . . . . . . . . . . . . . . . . . . . . . . . . . 903 cc ES engine 22 3.5 1.07 1.60 F89 0.47 1.60 0.40 0.45 0.85 2.50 1.50 1.00 1.50 10.5 to 11.0 0.75 to 0.80 4.0 to 5.5 cc Solex C 32 DISA/14 Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Venturi . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Auxiliary venturi . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Main jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Air bleed jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Emulsion tube . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Idle jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Idle air jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pump jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pump outlet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fuel inlet needle valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Anti-syphon device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Idle mixture adjustment hole . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Float setting (fuel level) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fast idle (throttle valve plate gap) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Accelerator pump delivery (ten strokes) . . . . . . . . . . . . . . . . . . . . . . . . . 903 cc ES engine 23 3.4 1.20 1.30 B03 0.525 1.20 0.70 0.45 1.60 2.0 1.20 2.0 to 3.0 0.90 to 1.0 2.5 to 4.5 cc Weber 32 ICEV 51/250 Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Venturi . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Auxiliary venturi . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Main jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Air bleed jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Emulsion tube . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Idle jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Air idle jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pump jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pump outlet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Superfeed jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Superfeed mixture jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1116 cc engine 22 35 1.15 1.90 F74 0.47 1.55 0.40 0.45 0.90 2.50 Fuel system 3•3 Weber 32 ICEV 51/250 (continued) Fuel inlet needle valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Anti-syphon device. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Idle mixture adjustment hole . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Float setting (fuel level) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Float setting (travel/stroke) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fast idle (throttle valve plate gap) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Accelerator pump delivery (ten strokes) . . . . . . . . . . . . . . . . . . . . . . . . . 1.50 1.00 1.50 10.5 to 11.0 45.0 0.85 to 0.90 3.2 to 5.2 cc Solex C 32 DISA/12 Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Venturi . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Auxiliary venturi . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Main jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Air bleed jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Emulsion tube . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Idle jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Air idle jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pump jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pump outlet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Superfeed jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Superfeed mixture jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fuel inlet needle valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Anti-syphon device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Idle mixture adjustment hole . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Float setting (fuel level) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fast idle (throttle valve plate gap) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Accelerator pump delivery (ten strokes) . . . . . . . . . . . . . . . . . . . . . . . . . 1116 cc engine 22 3.4 1.22 2.0 86 0.57 1.40 0.45 0.50 1.15 2.0 1.60 1.60 1.70 2.0 to 3.0 0.90 to 1.0 3.0 to 4.0 cc Weber 30/32 DMTR 90/250 Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1301 cc engine Primary 19 3.5 0.87 1.85 F43 0.50 11.0 0.45 0.40 - Venturi . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Auxiliary venturi . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Main jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Air bleed jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Emulsion tube . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Idle jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Air idle jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pump jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pump outlet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Superfeed jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Superfeed mixture jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fuel inlet needle valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Anti-syphon device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Idle mixture adjustment hole . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Float setting (fuel level) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fast idle (throttle valve plate gap) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Accelerator pump delivery (ten strokes) . . . . . . . . . . . . . . . . . . . . . . . . . 1.60 1.50 6.75 to 7.25 0.90 to 0.95 8.5 to 12.5 cc Solex C 30/32 CIC/1 Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1301 cc engine Venturi . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Auxiliary venturi . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Main jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Air bleed jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Emulsion tube . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Idle jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Air idle jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pump jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pump outlet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fuel inlet needle valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Anti-syphon device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Idle mixture adjustment hole . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Float setting (fuel level) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fast idle (throttle valve plate gap) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Accelerator pump delivery (ten strokes) . . . . . . . . . . . . . . . . . . . . . . . . . Primary 19 3.2 1.15 2.30 95 0.50 1.20 0.50 0.45 1.60 1.80 1.60 6.5 to 7.5 0.90 to 1.0 7.5 to 9.5 cc Secondary 23 5 0.95 1.75 F38 0.50 0.70 0.80 2.00 1.50 Secondary 23 4 1.27 2.0 95 0.50 1.60 - 3 3•4 Fuel system Engine idle speed At normal operating temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 800 to 850 rev/min CO percentage at idle 3.5 maximum ................................. Torque wrench settings Exhaust manifold nuts (903 cc) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Exhaust and intake manifold nuts (1116 cc, 1301 cc) . . . . . . . . . . . . . . Fuel pump nuts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Carburettor mounting nuts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Description and maintenance 1 Nm 20 28 28 25 2 Air cleaner - servicing, removal and refitting lbf ft 15 20 20 18 1 6 Take out the filter element and discard it. Wipe out the air cleaner casing (photo). 7 Locate the new element and refit the cover aligning the appropriate symbols. 903 cc engine 1 The fuel system consists of a rear-mounted fuel tank, a mechanically-operated fuel pump and a carburettor and air cleaner. 2 On all engines except the 1301 cc a single venturi downdraught carburettor is fitted. On the 1301 cc version, a dual barrel carburettor is fitted. 3 Maintenance consists of periodically checking the condition and security of the fuel hoses to the pump and carburettor. The fuel pump cannot be cleaned or repaired and in the event of a fault developing, the pump must be renewed. 4 On ES versions, an electronic fuel cut-out device is fitted which reduces fuel consumption on overrun, see Chapter 9, Section 33. 1 The air cleaner air intake draws air either from the front of the car or from the outside of the exhaust manifold according to ambient temperature (photo). 2 At an ambient temperature of 13ºC (55ºF) and above, the SUN symbol should align with the intake spout arrow head. Remove the cover nuts and turn the cover. 3 At an ambient temperature lower than this, move the air cleaner cover until the SNOWFLAKE symbol aligns with the intake spout arrow head. 4 At the intervals specified in “Routine Maintenance” renew the air cleaner filter element. 5 To do this, remove the cover nuts and take off the cover (photo). 2.1 Air cleaner hot air intake 2.5 Air cleaner cover 2.6 Removing air cleaner element 2.9 Crankcase vent hose at air cleaner 2.11A Air cleaner mounting studs (1116 cc) 2.11B Air cleaner mounting bracket and pipe clip 8 To remove the air cleaner from the 903 cc engine, unscrew the nuts and take off the cover. Lift out the filter element. 9 Unbolt the air cleaner casing from the carburettor flange and from the bracket on the rocker cover. Disconnect the vent hose (photo). 10 Disconnect the warm and cool air intake hoses from their collecting points and lift the air cleaner from the engine. 1116 cc and 1301 cc engines 11 Removing the air cleaner from the 1116 cc engine is similar to that described for the 903 cc engine, but having a cylinder head support bracket (photos). Fuel system 3•5 3.4 Fuel pump 3.6A Fuel pump on mounting studs 3.6B Fuel pump spacer and pushrod 12 The air cleaner on the 1301 cc engine is mounted on the four flange studs of the carburettors, their nuts being accessible after the air cleaner lid has been removed and the filter element extracted. 13 Refitting of all types of air cleaner is a reversal of removal. spacer should always be 0.3 mm thick, but gaskets for the outboard side are available in thicknesses 0.3, 0.7 and 1.2 mm, as a means of adjusting the fuel pump pressure. The standard fuel pressure is 0.176 bar (2.55 lbf/in 2). If the pressure is too high a thicker gasket should be used, if too low, fit a thinner one. 1 It is preferable to remove the fuel tank when it has only a very small quantity of fuel in it. If this cannot be arranged, syphon out as much fuel as possible into a suitable container which can be sealed. 2 The tank is mounted just forward of the rear axle. 3 Disconnect the filler hose and the breather hose from the tank (photo). 4 Unscrew the mounting bolts from the support straps and lower the tank using a jack with a block of wood as an insulator. Release the handbrake cable from its support bracket on the side of the tank (photo). 5 Once the tank has been lowered sufficiently far, disconnect the fuel supply and return hoses, breather hose and sender unit leads and remove the tank from the car. Warning: Never attempt to solder or weld a fuel tank yourself; always leave fuel tank repairs to the experts. Never syphon fuel into a container in an inspection pit. Fuel vapour is heavier than air and can remain in the pit for a considerable time. 6 If the tank contains sediment or water, clean it out by using several changes of paraffin and shaking vigorously. In order to avoid damage to the sender unit, remove this before commencing operations. 7 Finally allow to drain and rinse out with clean fuel. 8 Refit by reversing the removal operations. 9 On 1984 and later models, the fuel tank is of plastic construction. 5.3 Fuel tank filler and vent hoses 5.4 Fuel tank mounting straps 3 Fuel pump removal and refitting 2 1 On 903 cc engines, the fuel pump is mounted on the side of the timing chain cover and is driven by a pushrod from an eccentric on the front of the camshaft. 2 On the 1116 cc and 1301 cc engines, the fuel pump is mounted on the side of the crankcase and is driven by a pushrod from an eccentric on the auxiliary shaft. 3 The removal of both types of pump is carried out in a similar way. 4 Disconnect the fuel inlet hose from the pump and plug the hose (photo). 5 Disconnect the fuel outlet hose from the pump. 6 Unscrew the pump fixing bolt and remove it together with spacer, pushrod and gaskets (photos). 7 Refitting is a reversal of removal. Make sure that a new gasket is located on each side of the spacer. 8 The gasket on the inboard side of the 4.1 Fuel tank transmitter 4 Fuel level transmitter removal and refitting 1 1 The transmitter is accessible after having removed the small cover panel from the floor of the car under the rear seat (tipped forward) with the floor covering peeled back (photo). 2 Disconnect the fuel flow and return hoses and the electrical leads from the transmitter. 3 Unscrew the securing ring and lift the transmitter from the tank. 4 Refitting is a reversal of removal. Use a new rubber sealing ring. 5 Fuel tank removal and refitting 1 3 3•6 Fuel system Fig. 3.1 Weber 32 ICEV 50/250 (Sec 6) Fig. 3.2 Solex C32 DISA 11 (Sec 6) Fig. 3.3 Weber 32 ICEV 51/250 (Sec 6) Fig. 3.4 Solex C32 DISA 12 (Sec 6) Fig. 3.5 Weber 30/32 DMTR 90/250 (Sec 6) Fig. 3.6 Weber 32 ICEE/250 (Sec 6) 6 Carburettors - general Fig. 3.7 Solex C30/32 CIC/1 (Sec 6) Fig. 3.8 C32 DISA 14 (Sec 6) Key to carburettor illustrations 1 Idle speed screw A Throttle valve plate 2 Anti-tamper plug an idle mixture adustment screw B Idle cut out device 1 The need to completely overhaul a carburettor is rare. A carburettor can normally be kept in good working order if the top cover is removed and the fuel mopped out of the fuel bowl. Individual jets can be removed and blown through. Never probe them with wire or their calibration will be ruined. 2 Take the opportunity to check the jet sizes and other components against those listed in the Specifications in case a previous owner has substituted some of incorrect calibration. 3 When the stage is reached where the valve plate spindle bushes have worn, then the carburettor should be renewed complete. 4 When reassembling the carburettor, use new gaskets which can be obtained in a repair pack. Fuel system 3•7 8.2 Fuel hose at carburettor 7 Carburettor idle speed and mixture - adjustment 8.6 Carburettor mounting flange nut 4 1 All carburettors have their mixture adjustment set in production. The screw is fitted with a tamperproof cap. 2 Under normal circumstances, only the idle speed screw need be adjusted to set the engine idle speed to the specified level. 3 Before attempting to adjust the idle speed or mixture, it is important to have the ignition and valve clearances correctly set and the engine at normal operating temperature with the air cleaner fitted. 4 Where the mixture must be adjusted, prise out the tamperproof plug and turn the mixture screw in to weaken or out to enrich the mixture until the engine runs smoothly without any tendency to “hunt”. 5 Ideally an exhaust gas analyser should be used to make sure that the CO level is within the specified range. 6 Once the mixture has been correctly set, re-adjust the idle speed screw. 8 Carburettor removal and refitting 2 1 Remove the air cleaner. 2 Disconnect the flow and return fuel hoses from the carburettor and plug them. 3 Disconnect the coolant hoses from the carburettor throttle valve plate block. Provided the cooling system is cold and not under pressure there should be almost no loss of coolant. Tie the hoses up as high as possible with a piece of wire. 4 Disconnect the vacuum and vent hoses from the carburettor. 5 Disconnect the throttle and choke controls from the carburettor. 6 Unscrew the mounting flange nuts and lift the carburettor from the intake manifold (photo). 7 Refitting is a reversal of removal. Use a new flange gasket and make sure that the fuel return hose is routed above the air cleaner intake. 9 Carburettor (Weber 32 ICEV 50/250/1) servicing and adjustment 1 The carburettor top cover with float may be removed without the need to withdraw the carburettor from the manifold. The other adjustments described will require removal of the carburettor. 2 Unscrew the filter plug from the top cover, clean the filter screen and refit it. 3 Extract the top cover fixing screws, lift the cover and tilt it to unhook it from the diaphragm capsule link rod. 4 Access to the fuel inlet needle valve is Fig. 3.10 Float setting diagram (Weber 32 ICEV 50/250) (Sec 9) A = 10.5 to 11.0 mm (0.41 to 0.44 in) 4 B = 45.0 mm (1.77 in) Fig. 3.9 Fuel return hose correctly located (Sec 8) obtained by carefully tapping out the float arm pivot pin. Take care, the pivot pin pillars are very brittle. 5 Check that the needle valve body is tight otherwise fuel can bypass the needle valve and cause flooding. Float adjustment 6 Reassemble and check the float setting. Do this by holding the top cover vertically so that the float hangs down under its own weight. Measure dimension (A) (Fig. 3.10) which should be between 1 0.50 and 11.10 mm (0.41 to 0.44 in) with the gasket in position. If necessary, bend the float arm tab to adjust. 7 Now check the float travel which should be 45.0 mm (1.77 in). If adjustment is required, bend the end of the float arm. Accelerator pump stroke 8 Using a twist drill as a gauge, open the throttle valve plate through 3.5 mm (0.138 in). 9 Turn the nut on the accelerator pump rod until it just makes contact with the pump control lever. Fast idle adjustment 10 With the choke valve plate fully closed by means of the control lever, the throttle valve Fig. 3.11 Accelerator pump setting diagram (Weber 32 ICEV 50/250) (Sec 9) X = 3.5 mm (0.138 in) 3 3•8 Fuel system Fig. 3.12 Fast idle adjustment diagram (Weber 32 ICEV 50/250) (Sec 9) Fig. 3.13 Anti-flooding device (Weber 32 ICEV 50/250) (Sec 9) A = 0.75 to 0.80 mm (0.030 to 0.032 in) Y = 3.75 to 4.25 mm (0.148 to 0.167 in) plate should be open (dimension A) (Fig. 3.1 2) between 0.75 and 0.80 mm (0.030 and 0.032 in). Adjust if necessary by means of the screw and locknut. Anti-flooding device 11 This consists of a diaphragm capsule and link rod. 12 The condition of the diaphragm can be checked by applying a vacuum source to the hole in the throttle valve plate block. The vacuum pressure will drop if there is a leak. 13 Actuate the choke valve plate lever fully and depress the control lever of the anti-flooding device to simulate operating vacuum. 14 There should be a gap (Y) (Fig. 3.15) between the edge of the choke valve plate and the wall of the carburettor throat of between 3.75 and 4.25 mm (0.148 and 0.167 in). Any adjustment that may be needed should be carried out by bending the link rod. 10 Carburettor (Solex C32 DISA 11) servicing and adjustment Fig. 3.14 Anti-flooding device vacuum intake (Weber 342 ICEV 50/250) (Sec 9) 1 Vacuum intake hole 4 1 The carburettor top cover with float may be removed without the need to withdraw the carburettor from the manifold. The other adjustments described will require removal of the carburettor. Fig. 3.15 Choke valve gap opening (Weber 32 ICEV 50/250) (Sec 9) Fig. 3.16 Float setting diagram (Solex C32 DISA 11) (Sec 10) Y = 3.75 to 4.25 mm (0.148 to 0.167 in) A = 2.0 to 3.0 mm (0.079 to 0.118 in) 2 Extract the top cover fixing screws, disconnect the small externally mounted tension spring and take off the top cover. 3 Access to the fuel inlet needle valve is obtained by carefully tapping out the float arm pivot pin. Take care, the pivot pin pillars are very brittle. 4 Check that the needle valve body is tight otherwise fuel can bypass the needle valve and cause flooding. Float adjustment 5 Reassemble and check the float setting. Do this by inverting the top cover so that the weight of the float fully depresses the ball of the needle valve. The distance (A) (Fig. 3.16) between the float and the surface of the top cover flange gasket should be between 2.0 and 3.0 mm (0.079 and 0.118 in). If adjustment is required, alter the thickness of the washer under the needle valve. Accelerator pump 6 Fill the carburettor float chamber and then operate the throttle valve plate lever several times to prime the pump. 7 Position a test tube under the accelerator Fig. 3.17 Adjusting accelerator pump rod (Solex C32 DISA 11) (Sec 10) Fuel system 3•9 Fig. 3.18 Fast idle adjustment diagram (Solex C32 DISA 11) (Sec 10) Fig. 3.19 Anti-flooding device adjustment diagram (Solex C32 DISA 11) (Sec 10) X = 0.90 to 1.0 mm (0.035 to 0.039 in) X = 4.75 to 5.25 mm (0.187 to 0.207 in) pump jet and give ten full strokes of the throttle lever, pausing between each stroke to allow fuel to finish dripping. 8 The total volume of fuel collected should be between 2.5 and 4.5 cc. Adjust the nut on the pump control and if necessary to increase or decrease the volume of fuel ejected. Fast idle adjustment 9 With the choke valve plate fully closed, the throttle valve plate should be open to give a dimension (X) (Fig. 3.18) of between 0.90 and 1.0 mm (0.035 to 0.039 in). Use a twist drill of suitable diameter to measure the gap. If necessary, adjust by means of the screw and locknut. Anti-flooding device 10 Close the choke valve plate by means of the control lever. At the same time, push the lean out valve rod towards the valve. 11 There should be a gap (X) (Fig. 3.19) between the edge of the choke valve plate Fig. 3.20 Moving lean out valve rod (Solex C32 DISA 11) (Sec 10) X = 4.75 to 5.25 mm (0.187 to 0.207 in) and the carburettor throat of between 4.75 and 5.25 mm (0.187 to 0.207 in). Adjust if necessary by means of the screw and locknut on the lean out valve. 11 Carburettors (Weber 32 ICEE/ 250 and Solex C32 DISA 14) description and adjustment 4 1 One of these carburettors is used on 903 cc ES engines. They are very similar to the Weber 32 ICEV 50/250 and Solex C32 DISA 11 already described in this Chapter except that a fuel cut-out solenoid valve is fitted in association with the Digiplex ignition system (see Chapters 4 and 9). 2 The solenoid valve cuts off the supply of fuel to the carburettor whenever the accelerator pedal is released during overrun conditions. 3 A fuel cut-out device control unit receives information regarding engine speed from the static ignition control unit. 4 A throttle butterfly switch relays information Fig. 3.21 Sectional view of fuel cut-off switch (Solex C32 DISA 14) (Sec 11) that the accelerator pedal is in the released state. 5 At certain minimum idle speeds during deceleration, the fuel cut-out solenoid valve is re-energised so that engine idling is maintained without the tendency to cut out. 6 The Solex type control unit varies the fuel cut-out point according to the deceleration value. Fault testing 7 Should a fault develop, connect a test lamp between the fuel cut-out solenoid switch and a good earth. 8 Connect a reliable tachometer to the engine in accordance with the maker’s instructions. 9 Start the engine and raise its speed to between 3000 and 4000 rev/min, then fully release the accelerator pedal. 10 The test lamp should only go out during the period when the accelerator pedal is released. Should the test lamp remain on all the time, or never come on, check the throttle switch earth and the solenoid switch connections. 11 Disconnect the multi-plug from the control unit. Switch on the ignition and check that a test lamp connected between contact 7 of the multi-plug and earth will illuminate. If it does not, there is an open circuit from connection 15/54 of the fuel cut-off switch. 12 Switch off the ignition and check for continuity between contact 3 of the multiplug and earth. An ohmmeter will be required for this test. 13 If there is no continuity (ohmmeter shows infinity), check all the system earth connections. Also check that the wiring plug under the control unit is properly connected. 14 Finally, check the engine speed signal. To do this, a tachometer must be connected to the single socket under the control unit within the engine compartment. 15 If the tachometer registers correctly then this confirms that the electronic ignition 3 3•10 Fuel system Fig. 3.22 Primary valve plate opening (Weber 30/32 DMTR 90/250) (Sec 14) Fig. 3.23 Bending throttle lever stop (Weber 30/32 DMTR 90/250) (Sec 14) X = 6.45 to 6.95 mm (0.25 to 0.27 in) X (primary) = 13.5 to 14.5 mm (0.53 to 0.57 in) Y (secondary) = 14.5 to 15.5 mm (0.57 to 0.61 in) control unit is functioning, if the tachometer does not register, renew the ignition control unit. 16 If a replacement carburettor is to be fitted, only fit the Solex assembly including the control module, even if a Weber was originally fitted. 12 Carburettor (Weber 32 ICEV 51/250) servicing and adjustment Fig. 3.24 Throttle valve plate openings (Weber 30/32 DMTR 90/250) (Sec 14) 4 1 This carburettor, fitted to 1116 cc engines, is very similar to the unit described in Section 9. 2 The fast idle adjustment procedure is identical, but note that dimension (A) (Fig. 3.12) should be between 0.85 and 0.90 mm (0.033 and 0.035 in). 3 The choke valve plate gap (Y) (Fig. 3.13) should be between 5.5 and 6.5 mm (0.22 and 0.26 in) and if adjustment is required, bend the stop on the control lever. 13 Carburettor (Solex C32 DISA 12) servicing and adjustment 4 1 This carburettor is an alternative to the Weber fitted to 1116 cc engines. 2 The adjustments described in Section 9 apply. Float adjustment 3 Hold the cover vertically so that the floats hang down under their own weight. Measure the distance between the float and the surface of the gasket on the top cover. This should be between 6.75 and 7.25 mm (0.27 and 0.29 in). 4 Bend the float arm if necessary to adjust the setting. Primary valve plate opening 14 Carburettor (Weber 30/32 DMTR 90/250) - servicing and adjustment 4 1 The carburettor top cover with float may be removed without the need to withdraw the carburettor from the manifold. The other adjustments described in this Section will require removal of the carburettor. 2 Extract the top cover fixing screws and lift away the top cover with float. Access to the fuel inlet needle valve is as described in Section 9 paragraphs 4 and 5. 5 With the throttle valve plate control lever in contact with the stop, the primary valve plate should be open (dimension X Fig. 3.22) between 6.45 and 6.95 mm (0.25 and 0.27 in). If adjustment is required, carefully bend the lever stop. Primary and secondary valve plate openings 6 With the throttle control lever fully actuated the valve plate gaps (X and Y Fig. 3.24) should be: X = 13.5 to 14.5 mm (0.53 to 0.57 in) Y = 14.5 to 15.5 mm (0.57 to 0.61 in) Fast idle 7 Close the choke valve plate fully and check the gap (A) (Fig. 3.25) between the edge of the throttle valve plate and the carburettor throat. The gap should be between 0.90 and 0.95 mm (0.035 and 0.037 in), a twist drill is useful for measuring this. 8 If adjustment is required, carry this out using the screw and locknut. Anti-flooding device (mechanically-operated) Fig. 3.25 Fast idle adjustment diagram (Weber 30/32 DMTR 90/250) (Sec 14) A = 0.90 to 0.95 mm (0.035 to 0.037 in) Fig. 3.26 Anti-flooding device (mechanical) adjustment diagram (Weber 30/32 DMTR 90/250) (Sec 14) X = 7.0 to 7.5 mm (0.28 to 0.30 in) 9 With the choke control pulled fully out, it should be possible to open the choke valve plate to give a gap (X) of between 7.0 and 7.5 mm (0.28 and 0.30 in). If adjustment is required, carefully bend the stop on the control lever (Fig. 3.26). Fuel system 3•11 Fig. 3.28 Float setting diagram (Solex C30-32 CIC/1) (Sec 14) Fig. 3.27 Anti-flooding device (automatic) adjustment diagram (Weber 30/32 DMTR 90/250) (Sec 14) Y = 3.75 to 4.25 mm (0.148 to 0.167 in) Anti-flooding device (automatic) 10 Pull the choke control fully out and hold the control lever, on the anti-flooding device, depressed. There should be a gap (Y) (Fig. 3.27) between the edge of the choke valve plate and the carburettor wall of between 3.75 and 4.25 mm (0.15 and 0.17 in). If adjustment is required, turn the adjuster screw provided. 15 Carburettor (Solex C30-32 (CIC/1) servicing and adjustment 4 A = 6.7 to 7.5 mm (0.26 to 0.30 in) weight of the floats depresses the ball of the needle valve. 6 Measure the distance between the float and the surface of the cover gasket. This should be between 6.5 and 7.5 mm (0.26 and 0.30 in). If adjustment is required, change the thickness of the needle valve washer or carefully bend the float arm. Accelerator pump 7 Refer to Section 10, paragraphs 6 and 7. The total volume of fuel collected should be between 7.5 and 9.5 cc. If the volume of fuel is incorrect, release the locknut and turn the adjuster screw on the pump lever then re-test the volume ejected. Fast idle 1 The carburettor top cover with float may be removed without the need to withdraw the carburettor from the manifold. 2 The other adjustments described in this Section will require removal of the carburettor. 3 Extract the top cover fixing screws and lift away the top cover with float. 4 Refer to Section 9 paragraphs 4 and 5 for details of removal of the fuel inlet needle valve. Float adjustment 5 Invert the carburettor cover so that the Fig. 3.30 Fast idle screw on Solex C30-32 CIC/1 (Sec 15) A Choke control lever B Fast idle adjustment C Lean out valve 8 Operate the choke control lever to close the choke valve plate. The gap between the edge of the primary throttle valve plate and the venturi wall should be between 0.90 and 1.00 mm (0.035 and 0.039 in). If adjustment is required, turn the nut on the fast idle rod. Automatic anti-flooding device 9 The vacuum system of the device can be checked for leaks by applying a vacuum to the drilling in the carburettor throttle valve block. If vacuum cannot be maintained, renew the diaphragm. Fig. 3.31 Vacuum drilling for automatic anti-flooding device (Solex C30-32 CIC/1) (Sec 15) Fig. 3.29 Adjusting accelerator pump stroke (Solex C30-32 CIC/1) (Sec 15) Choke valve plate automatic opening 10 Move the choke control lever to fully close the choke valve plate and then press the lean out valve rod. There should now be a gap (X) (Fig. 3.32) between the edge of the choke valve plate and the wall of the carburettor throat of between 4.75 and 5.25 mm (0.187 and 0.207 in). 11 Where adjustment is required, release the locknut and turn the screw on the lean out valve. 16 Economy meter 1 This device is fitted to ES (energy saving) models. It is essentially a vacuum gauge to advise the driver with regard to economical throttle opening related to engine and road speed. The point of change to a higher gear can also be deduced from this gauge. The latter facility is provided by an LED (light emitting diode). 2 Fault testing of the system is described in Chapter 9. Fig. 3.32 Choke valve plate setting (Solex C30-32 CIC/1) (Sec 15) X = 4.75 to 5.25 mm (0.187 to 0.207 in) 3 3•12 Fuel system 17.4 Throttle cable sleeve and bracket 17 Accelerator cable adjustment and renewal 2 1 The socket type cable end fitting is detached from the carburettor throttle lever simply by prising it off the ball stud. 2 Adjustment can be carried out by releasing the locknut and turning the end fitting. With the accelerator pedal fully depressed, check that full throttle can be obtained at the carburettor. 3 To renew the cable, prise off the end fitting from the carburettor throttle lever. 4 Slip the cable sleeve from its retaining bracket (photo). 5 Working inside the car under the facia panel, slip the cable from the fork at the top of the accelerator pedal arm (photo). 17.5 Accelerator pedal 18.2 Choke cable at carburettor 6 Withdraw the cable through the engine compartment bulkhead. 7 Fit the new cable by reversing the removal operations, adjust as described in paragraph 2. control lever and the choke warning lamp lead unplugged. 5 Withdraw the cable assembly through the engine compartment rear bulkhead. 6 Fit the new cable by reversing the removal operations. Before tightening the inner cable pinch screw at the carburettor, hold the choke valve plate open and pull the control lever out 2.0 or 3.0 mm, then tighten the screw. This will provide just enough free movement to ensure that when the control is pushed fully in the choke valve plate will remain fully open even with engine movement slightly stretching the cable. 18 Choke control cable removal and refitting 2 1 Remove the air cleaner. 2 Release the choke outer cable clamp and the inner cable from the swivel on the choke control lever (photo). 3 The choke control is of lever type. To remove it, extract its hinge screw, accessible when the lever is pulled upwards (photo). 4 Withdraw the choke cable assembly until the inner cable can be released from the hand 18.3 Extracting choke control lever screw 19.4A Manifold gasket 19.4B Fitting exhaust manifold 19.4C Fitting intake manifold complete with carburettor 19 Manifolds and exhaust system 1 1 The intake manifold on 903 cc engines is integral with the cylinder head. 2 On the other engines, the intake and exhaust manifolds are mounted on the same side of the cylinder head. 3 A hot air collector plate is fitted over the exhaust manifold from where the air cleaner draws air when in the winter setting. 4 When fitting a manifold, thoroughly clean the cylinder head and manifold mating surfaces, use a new gasket and tighten nuts to the specified torque (photos). 5 The exhaust system on 903 cc models is of single downpipe, single silencer two section type. 19.7A Exhaust pipe support rings Fuel system 3•13 19.7B Exhaust tailpipe mounting 19.10 Exhaust pipe socket clamp 6 On 1116 cc and 1301 cc models, the exhaust system is of dual downpipe, two silencer, two section type. 7 The exhaust system is flexibly mounted (photo). 8 Do not attempt to separate the sections of the exhaust system, while in position in the car. Unbolt the pipe from the manifold and, using a screwdriver, prise off the flexible suspension rings. Provided the car is then raised on jacks, ramps or placed over an inspection pit, the complete exhaust system can be withdrawn from under the car. 9 If only one section is to be renewed, it is far easier to separate once the complete system is out of the car. 10 When refitting, grease the pipe sockets and fit the clamps loosely until the suspension rings are connected and the downpipe bolted up (using a new copper gasket). Check the attitude of the sections with regard to each other and the adjacent parts of the underbody. Fully tighten the clamps and downpipe flange nuts, remembering to bend up the lockplate tabs on 1116 cc and 1301 cc models (photo). 11 On the larger engined models, it may be necessary to raise the vehicle at the rear and support it on axle stands so that the rear suspension hangs down and is fully extended. This will allow sufficient clearance between the axle and the body for the exhaust system to be withdrawn. Fault finding - fuel system Unsatisfactory engine performance and excessive fuel consumption are not necessarily the fault of the fuel system or carburettor. In fact they more commonly occur as a result of ignition and timing faults. Before acting on the following it is necessary to check the ignition system first. Even though a fault may lie in the fuel system it will be difficult to trace unless the ignition is correct. The faults below, therefore, assume that this has been attended to first (where appropriate). Smell of petrol when engine is stopped m Leaking fuel lines or unions m Leaking fuel tank Smell of petrol when engine is idling m Leaking fuel line unions between pump and carburettor m Overflow of fuel from float chamber due to wrong level setting, ineffective needle valve or punctured float Excessive fuel consumption for reasons not covered by leaks or float chamber faults m m m m Worn jets Over-rich setting Sticking mechanism Dirty air cleaner element Difficult starting when cold m Choke control m Insufficient use of manual choke m Weak mixture Difficult starting, uneven running, lack of power, cutting out m m m m One or more jets blocked or restricted Float chamber fuel level too low or needle valve sticking Fuel pump not delivering sufficient fuel Induction leak Difficult starting when hot m m m m Excessive use of manual choke Accelerator pedal pumped before starting Vapour lock (especially in hot weather or at high altitude) Rich mixture Engine does not respond properly to throttle m Faulty accelerator pump m Blocked jet(s) m Slack in accelerator cable Engine idle speed drops when hot m Incorrect air cleaner intake setting m Overheated fuel pump Engine runs on m Idle speed too high 3 4•1 Chapter 4 Ignition system For modifications and information applicable to later models, see Supplement at end of manual Contents Condenser (capacitor) - removal, testing and refitting . . . . . . . . . . . Digiplex (electronic) - ignition checks and adjustments . . . . . . . . . . Digiplex (electronic) ignition - location of components and precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Distributor - removal and refitting . . . . . . . . . . . . . . . . . . . . . . . . . . . Distributor (mechanical breaker type) - overhaul . . . . . . . . . . . . . . . Dwell angle - checking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 10 9 6 7 3 Fault finding - ignition system . . . . . . . . . . . . . . . . See end of Chapter General description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Ignition coil - (mechanical breaker ignition) . . . . . . . . . . . . . . . . . . . . 8 Ignition switch - removal and refitting . . . . . . . . . . . . . . . . . . . . . . . . 12 Ignition timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Mechanical contact breaker - points servicing . . . . . . . . . . . . . . . . . 2 Spark plugs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Degrees of difficulty Easy, suitable for novice with little experience 1 Fairly easy, suitable for beginner with some experience 2 Fairly difficult, suitable for competent DIY mechanic 3 Difficult, suitable for experienced DIY mechanic 4 Very difficult, suitable for expert DIY or professional 5 Specifications System type Except ES engines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ES engines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Battery, coil mechanical breaker distributor Marelli Digiplex electronic with breakerless distributor Firing order 1 - 3 - 4 - 2 (No. 1 cylinder at crankshaft pulley end) ............................................ Mechanical breaker distributor Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Contact breaker points gap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Condenser capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Dwell angle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Rotor rotational direction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ignition timing (dynamic) 903 cc engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1116 and 1301 cc engines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Centrifugal advance: 903 cc engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1116 and 1301 cc engines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Vacuum advance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ignition coil Primary winding resistance at 20ºC (68ºF) . . . . . . . . . . . . . . . . . . . . . . . Secondary winding resistance at 20ºC (68ºF) . . . . . . . . . . . . . . . . . . . . Marelli or Ducellier 0.37 to 0.43 mm (0.015 to 0.017 in) 0.20 to 0.25 µF 52 to 58º Clockwise 5º BTDC at idle 10º BTDC at idle Between 30 and 34º max Between 22 and 24º max Between 10 and 14º max Between 2.6 and 3.3 ohms depending upon make of coil Between 6745 and 12 000 ohms depending upon make of coil Marelli Digiplex electronic ignition Rotor arm resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Advance range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1000 ohms Between 6 to 10º and 47 to 51º Engine speed sensor Resistance on flywheel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Sensor to flywheel tooth gap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 612 to 748 ohms 0.25 to 1.3 mm (0.0099 to 0.0512 in) TDC sensor Resistance on pulley . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Sensor to pulley tooth gap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 612 to 748 ohms 0.4 to 1.0 mm (0.016 to 0.039 in) Ignition coil Primary winding resistance at 20ºC (68ºF) . . . . . . . . . . . . . . . . . . . . . . . Secondary winding resistance at 20ºC (68ºF) . . . . . . . . . . . . . . . . . . . . 0.310 to 0.378 ohms 3330 to 4070 ohms 4 4•2 Ignition system Spark plugs Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Electrode gap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Champion RN9YCC or RN9YC 0.8 mm (0.031 in) HT leads 903 cc (45) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1116, 1299 and 1301 cc (55, 60 and 70) . . . . . . . . . . . . . . . . . . . . . . . . Champion LS-07 Champion LS-05 Torque wrench setting Nm 25 Spark plugs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 General description On all models except the 903 ES engine version, a mechanical contact breaker type distributor is fitted. On 45 Super ES models which have the 903 ES engine, an electronic (Digiplex) ignition system is used which incorporates a breakerless distributor. contact breaker points causes the high tension voltage to build up, jump the gap from the rotor arm to the appropriate metal segment, and so via the spark plug lead to the spark plug, where it finally jumps the spark plug gap before going to earth. The ignition timing is advanced and retarded automatically, to ensure the spark lbf ft 18 occurs at just the right instant for the particular load at the prevailing engine speed. The ignition advance is controlled mechanically, and by vacuum. The mechanical governor mechanism consists of two weights, which move out from the distributor shaft as the engine speed rises, due to centrifugal force. As they move Mechanical contact breaker system For the engine to run correctly, it is necessary for an electrical spark to ignite the fuel/air mixture in the combustion chamber at exactly the right moment in relation to engine speed and load. The ignition system is based on feeding low tension voltage from the battery to the coil where it is converted to high tension voltage. The high tension voltage is powerful enough to jump the spark plug gap in the cylinders under high compression pressures, providing that the system is in good condition and that all adjustments are correct. The ignition system is divided into two circuits, the low tension (LT) circuit and the high tension (HT) circuit. The low tension (sometimes known as the primary) circuit consists of the battery, the lead to the ignition switch, the lead from the ignition switch to the low tension or primary coil windings, and the lead from the low tension coil windings to the contact breaker points and condenser in the distributor. The high tension circuit consists of the high tension or secondary coil windings, the heavy ignition lead from the centre of the coil to the centre of the distributor cap, the rotor arm, and the spark plug leads and spark plugs. The system functions in the following manner: High tension voltage is generated in the coil by the interruption of the low tension circuit. The interruption is effected by the opening of the contact breaker points in this low tension circuit. High tension voltage is fed from the centre of the coil via the carbon brush in the centre of the distributor cap to the rotor arm of the distributor. The rotor arm revolves at half engine speed inside the distributor cap, and each time it comes in line with one of the four metal segments in the cap, which are connected to the spark plug leads, the opening of the Fig. 4.1 Typical ignition circuit (mechanical contact breaker distributor) (Sec 1) 1 2 3 4 Control unit Multi-plug Ignition coil Distributor cap Fig. 4.2 Digiplex electronic ignition system (Sec 1) 5 Crankshaft pulley 9 Spark plugs 6 Flywheel 10 Wiring connector 7 Battery S1 Engine speed sensor 8 Rev counter S2 TDC sensor Ignition system 4•3 outwards, they rotate the cam relative to the distributor shaft, and so advance the spark. The weights are held in position by two springs and it is the tension of the springs which is largely responsible for correct spark advancement. The vacuum advance is controlled by a diaphragm capsule connected to the carburettor venturi. The vacuum pressure varies according to the throttle valve plate opening and so adjusts the ignition advance in accordance with the engine requirements. Digiplex ignition system This electronic system eliminates the mechanical contact breaker and centrifugal advance mechanism of conventional distributors and uses an electronic control unit to provide advance values according to engine speed and load. No provision is made for adjustment of the ignition timing. Information relayed to the control unit is provided by two magnetic sensors which monitor engine speed and TDC directly from the engine crankshaft. A vacuum sensor in the control unit converts intake manifold vacuum into an electric signal. The control unit selects the optimum advance angle required and a closed magnetic circuit resin coil guarantees a spark owing to the low primary winding resistance. Five hundred and twelve advance values are stored in the control unit memory to suit any combination of engine operating conditions. No maintenance is required to the distributor used on this system. Distributor drive The mechanical breaker type distributor on 903 cc engines and the Digiplex type distributor on 903 cc ES engines are mounted on the cylinder head and driven from a gear on the camshaft through a shaft which also drives the oil pump. The distributor on 1116 cc and 1301 cc engines is mounted on the crankcase and is driven from a gear on the auxiliary shaft as is also the oil pump. 2.16 Interior of distributor cap showing carbon brush 2 Mechanical contact breaker - points servicing 3 1 At the intervals specified in “Routine Maintenance”, prise down the clips on the distributor cap and place the cap with high tension leads to one side. 2 Pull off the rotor. 3 Remove the spark shield. Mechanical wear of the contact breaker reduces the gap. Electrical wear builds up a “pip” of burned metal on one of the contacts. This |prevents the gap being measured for re-adjustment, and also spoils the electric circuit. Ducellier type distributor 4 To remove the contact breaker movable arm, extract the clip and take off the washer from the top of the pivot post. 5 Extract the screw and remove the fixed contact arm. 6 Clean the points by rubbing the surfaces on a fine abrasive such as an oil stone. The point surface should be shaped to a gentle convex curve. All the “pip” burned onto one contact must be removed. It is not necessary to go on until all traces of the crater have been removed from the other. There is enough metal on the contacts to allow this to be done once. At alternate services, fit new points. Wash debris off cleaned points and preservatives off new ones. 7 Now the distributor should be lubricated. This lubrication is important for the correct mechanical function of the distributor, but excess lubrication will ruin the electrical circuits, and give difficult starting. 8 Whilst the contact breaker is off, squirt some engine oil into the bottom part of the distributor, onto the centrifugal advance mechanism below the plate. 9 Wet with oil the felt pad on the top of the distributor spindle, normally covered by the rotor arm. 10 Put just a drip of oil on the pivot for the moving contact. 2.20 Marelli distributor 11 Smear a little general purpose grease onto the cam, and the heel of the moving contact breaker. 12 Refit the contact points and then set the gap in the following way. 13 Turn the crankshaft by applying a spanner to the pulley nut or by jacking up a front wheel, engaging top gear and turning the roadwheel in the forward direction of travel. Keep turning until the plastic heel of the movable contact arm is on the high point of a cam lobe on the distributor shaft. 14 Set the points gap by moving the fixed contact arm until the specified feeler blades are a sliding fit. Tighten the fixed contact arm screw. 15 Check the contact end of the rotor arm. Remove any slightly burnt deposits using fine abrasive paper. Severe erosion will necessitate renewal of the rotor. 16 Wipe out the distributor cap and check for cracks or eroded contacts (photo). Renew if evident or if the carbon brush is worn. 17 Refit the spark shield, rotor and distributor cap. 18 Setting the contact breaker gap with a feeler blade must be regarded as a means of ensuring that the engine will start. For optimum engine performance, the dwell angle must be checked and adjusted as described in Section 3. Marelli type distributor 19 Open the points with a finger nail and inspect their condition. If they are badly eroded or burned, then they must be renewed. The contact points can only be renewed complete with carrier plate as an assembly. 20 Release the low tension leads from the terminals on the distributor body (photo). 21 Extract the screws which hold the vacuum advance capsule to the distributor body. Tilt the capsule and release its link rod from the contact breaker carrier plate (photo). 22 Prise out the E-clip from the breaker carrier and then withdraw the contact assembly from the top of the distributor shaft. 2.21 Extracting vacuum diaphragm unit screw 4 4•4 Ignition system 2.22A Marelli contact breaker E-clip 2.22B Washers above contact breaker Note the washers above and below the contact assembly (photos). 23 Fit the new contact assembly by reversing the removal operations. 24 Although the points gap is normally set in production, check it using feeler blades when the plastic heel of the movable arm is on a high point of the shaft cam. Adjust if necessary by inserting an Allen key (3.0 mm) into the socket-headed adjuster screw. 25 Carry out the operations described in paragraphs 14 to 17 in this Section. 3 Dwell angle - checking Fig. 4.3 Marelli contact breaker (Sec 2) Fig. 4.4 Adjusting Marelli type contact breaker points gap (Sec 2) 4.2 Distributor vacuum hose 3 The dwell angle is the number of degrees through which the distributor cam turns between the instants of closure and opening of the contact breaker points. 1 Connect a dwell meter in accordance with the maker’s instruction. The type of meter that operates with the engine running is to be preferred; any variation in contact breaker gap, caused by wear in the distributor shaft or bushes, or the height of the distributor cam peaks, is evened out when using this. 2 The correct dwell angle is given in the Specifications at the beginning of this Chapter. If the angle is too large, increase the contact points gap. If the angle is too small, reduce the points gap. Only very slight adjustments should be made to the gap before re-checking. Fig. 4.5 Flywheel housing timing marks (Sec 4) 3 On Ducellier distributors, adjustment of the dwell angle can only be carried out by switching off the ignition, removing the distributor cap, rotor and spark shield and adjusting the points gap. 4 Re-check once the engine is running. Adjustment may have to be carried out several times to obtain the correct dwell angle. 5 On Marelli distributors, adjustment of the points gap (dwell angle) is carried out with the engine running by inserting a 3.0 mm Allen key in the hole provided in the distributor body. 6 Always check and adjust the dwell angle before timing the ignition as described in Section 4. 4 Ignition timing 3 1 Timing the ignition on engines with mechanical breaker distributors is carried out in the following way. 2 Disconnect the vacuum hose from the distributor diaphragm capsule (photo). 3 Have the engine at normal operating temperature and idling with a stroboscope connected in accordance with the manufacturer’s instructions. 4 Point the stroboscope at the timing marks on the flywheel and the index on the aperture on the flywheel housing. The mark on the flywheel should be opposite to the BTDC mark on the index specified for your particular engine. Alternatively, use the notch on the crankshaft pulley and the marks on the timing belt cover (photo), but this will necessitate removal of the wheel arch shield. 5 If the marks are not in alignment, release the distributor clamp plate and turn the distributor gently until they are (photo). 6 Tighten the clamp plate nut, switch off the ignition, reconnect the vacuum hose and remove the stroboscope. 7 If there is any difficulty in seeing the timing marks clearly, highlight them by painting with quick-drying white paint. 4.4 Ignition timing marks on belt cover Ignition system 4•5 5 Condenser (capacitor) removal, testing and refitting 1 The purpose of the condenser (sometimes known as the capacitor) is to ensure that when the contact breaker points open there is no sparking across them which would weaken the spark and cause rapid deterioration of the points. The condenser is fitted in parallel with the contact breaker points. If it develops a short circuit it will cause ignition failure as the points will be prevented from interrupting the low tension circuit. 1 If the engine becomes very difficult to start (or begins to misfire whilst running) and the breaker points show signs of excessive burning, suspect the condenser has failed with open circuit. A test can be made by separating the points by hand with the ignition switched on. If this is accompanied by a bright spark at the contact points, it is indicative that the condenser has failed. 2 Without special test equipment, the only sure way to diagnose condenser trouble is to replace a suspected unit with a new one and note if there is any improvement. 3 To remove the condenser from the distributor, take out the screw which secures it to the distributor body and disconnect its leads from the terminals. 4 When fitting the condenser, it is vital to ensure that the fixing screw is secure. The lead must be secure on the terminal with no chance of short circuiting. 6 Distributor removal and refitting 3 1 Remove the spark plug from No. 4 cylinder and then turn the crankshaft either by applying a spanner to the pulley nut or by jacking up a front wheel, engaging top gear and turning the wheel in the forward direction of travel. 2 Place a finger over the plug hole and feel the compression being generated as the piston rises up the cylinder bore. 3 Alternatively, if the rocker cover is off, check that the valves on No. 1 cylinder are closed. 4 Continue turning the crankshaft until the flywheel and flywheel housing (BTDC) ignition timing marks are in alignment. Number 4 piston is now in firing position. 5 Remove the distributor cap and place it to one side complete with high tension leads. 6 Disconnect the distributor vacuum hose and low tension lead (photo). 7 Mark the distributor pedestal mounting plinth in relation to the crankcase. Also mark the contact end of the rotor in relation to the rim of the distributor body. 4.5 Distributor clamp plate nut 6.6 Distributor LT connection 8 Unbolt the clamp plate and withdraw the distributor. 9 Refit by having No. 4 piston at its firing position and the distributor rotor and pedestal marks aligned, then push the distributor into position, mating it to the splined driveshaft. 10 If a new distributor is being fitted then of course alignment marks will not be available to facilitate installation in which case, hold the unit over its mounting hole and observe the following. 903 cc engine: Distributor cap high tension lead sockets pointing towards alternator and at 90º to centre line of rocker cover. Contact end of rotor arm pointing towards No. 4 contact in distributor cap (when fitted). 1116 cc and 1301 cc engine: Distributor vacuum unit pointing downwards at 135º to rear edge of timing belt cover. Contact end of rotor arm pointing towards No. 4 contact in distributor cap (when fitted). 11 Tighten the distributor clamp bolt, reconnect the vacuum hose and the low tension leads. Refit the distributor cap. Screw in the spark plug. 12 Check the ignition timing as described in Section 4. 4 To remove the contact breaker movable arm, extract the clip and take off the washer from the top of the pivot post. 5 Extract the screw and remove the fixed contact arm. 6 Carefully record the setting of the advance toothed segment and then remove the spring clip and vacuum capsule fixing screws and withdraw the capsule with link rod. 7 Pick out the lubrication pad from the recess in the top of the distributor shaft. Unscrew the screw now exposed. 8 Mark the relationship of the cam to the counterweight pins and then remove the cam assembly. 9 There is no way to test the bob weight springs other than by checking the performance of the distributor on special test equipment, so if in doubt, fit new springs anyway. If the springs are loose where they loop over the posts, it is more than possible that the post grooves are worn. In this case, the various parts which include the shaft will need renewal. Wear to this extent would mean that a new distributor is probably the best solution in the long run. Be sure to make note of the engine number and any serial number on the distributor when ordering. 10 If the mainshaft is slack in its bushes or the cam on the spindle, allowing sideways play, it means that the contact points gap setting can only be a compromise; the cam position relative to the cam follower on the moving point arm is not constant. It is not practical to re-bush the distributor body unless you have a friend who can bore and bush it for you. The shaft can be removed by driving out the roll pin from the retaining collar at the bottom. (The collar also acts as an oil slinger to prevent excess engine oil creeping up the shaft.) 7 Distributor (mechanical breaker type) - overhaul 3 Ducellier 1 The cap must have no flaws or cracks and the HT terminal contacts should not be severely corroded. The centre spring-loaded carbon contact is renewable. If in any doubt about the cap, buy a new one. 2 The rotor deteriorates minimally, but with age the metal conductor tip may corrode. It should not be cracked or chipped and the metal conductor must not be loose. If in doubt, renew it. Always fit a new rotor if fitting a new cap. 3 With the distributor removed as described in the preceding Section, take off the rotor and contact breaker. Marelli 11 With the distributor removed from the engine, take off the spark shield and rotor. 12 Remove the contact breaker and carrier as described in Section 2. 13 Refer to paragraphs 9 and 10 for details of counterweight springs and shaft bushes (photo). 4 4•6 Ignition system 7.13 Marelli distributor centrifugal weights and springs Reassembly 14 This is a reversal of dismantling. On Ducellier distributors, make sure that the advance toothed segment is returned to its original setting otherwise the advance curves for your particular engine will be upset. 8 Ignition coil (mechanical breaker ignition) 1 Coils normally last the life of a car. The most usual reason for a coil to fail is after being left with the ignition switched on but the engine not running. There is then constant current flowing, instead of the intermittent flow when the contact breaker is opening. The coil then overheats, and the insulation is damaged (photo). 2 If the coil seems suspect after fault finding, the measurement of the resistance of the primary and secondary windings (usually an ohmmeter) can establish its condition. If an ohmmeter is not available, it will be necessary to try a new coil. Fig. 4.6 Exploded view of typical Ducellier distributor (Sec 7) 1 2 3 4 5 6 7 Cap Rotor Movable breaker arm Vacuum advance link Fixed contact breaker arm Contact breaker baseplate Cam assembly 8 Centrifugal advance weight control springs 9 Driveshaft and plate 10 Body 11 LT insulator 12 Condenser 13 Vacuum capsule 14 15 16 17 18 19 Cap retaining spring Thrust washer Spacer washer Driving dog Retaining pin Felt pad 9 Digiplex (electronic) ignition - location of components and precautions 1 The main components of this system are located within the engine compartment as shown. 2 On cars equipped with this system, it is 1 2 3 4 Control unit Cut-out control unit Ignition coil Flywheel (engine speed) sensor 5 Crankshaft pulley (TDC) sensor 6 Vacuum hose 8.1 Ignition coil Fig. 4.7 Main components of Digiplex ignition system (Sec 9) Ignition system 4•7 Fig. 4.8 Location of Digiplex ignition system components (Sec 9) 1 Control unit 2 Distributor 3 Ignition coil 4 TDC sensor 5 Wiring connector plug important that the following precautions are observed. 3 Never start the engine if the battery leads are loose. 4 Do not stop the engine by pulling off a battery lead. 5 Remove the control unit if ambient temperature (paint drying oven) is above 80ºC (176ºF). 6 Never connect or disconnect the multi-plug at the control unit unless the ignition is switched off. 7 Disconnect the battery negative lead before carrying out electric body welding. Fig. 4.9 Digiplex control unit (Sec 9) 1 Vacuum hose connector 2 Multi-plug socket 6 Engine speed sensor 7 Wiring connector plug Supply circuit and continuity of coil primary winding 10 Digiplex (electronic) ignition - checks and adjustments 3 1 Without special equipment, any work on the system components should be restricted to the following. Engine speed sensor 2 The gap between the sensor and the teeth of the flywheel should be between 0.25 and 1.3 mm (0.0099 to 0.0512 in). Any deviation will be due to mechanical damage to the sensor, no adjustment being possible. 5 Connect a test lamp between contacts 11 and 9 of the multi-plug having first pulled it from the control unit. 6 Switch on the ignition, the test lamp should come on. If it does not, either the connection at the positive pole of the control unit or the coil primary winding is open. Control unit earth 7 Connect a test lamp between contacts 8 and 9 of the multi-plug having first pulled it from the control unit. Switch on the ignition, the test lamp should come on. If it does not, improve the earth connection. TDC sensor 11 Spark plugs 1 3 The gap between the sensor and one of the TDC reference marks on the crankshaft pulley should be between 0.4 and 1.0 mm (0.016 to 0.039 in). 4 Any deviation will be due to the sensor plate becoming loose. To reposition it will necessitate setting No. 1 piston at TDC which can only be carried out accurately by your dealer using special tools. 1 The correct functioning of the spark plugs is vital for the correct running and efficiency of the engine. It is essential that the plugs fitted are appropriate for the engine, and the suitable type is specified at the beginning of this chapter. If Fig. 4.12 Test lamp connected between terminals 11 and 9 of control unit multi-plug (Sec 10) Fig. 4.13 Test lamp connected between terminals 8 and 9 of control unit multi-plug (Sec 10) Fig. 4.10 Engine speed sensor gap (Sec 10) Fig. 4.11 TDC sensor gap (Sec 10) 4 4•8 Ignition system Fig. 4.14 Spark plug connections on 903 cc engine (Sec 11) this type is used and the engine is in good condition, the spark plugs should not need attention between scheduled replacement intervals. Spark plug cleaning is rarely necessary and should not be attempted unless specialised equipment is available as damage can easily be caused to the firing ends. 2 At the specified intervals, the plugs should be renewed. The condition of the spark plug will also tell much about the overall condition of the engine. 3 If the insulator nose of the spark plug is clean and white, with no deposits, this is indicative of a weak mixture, or too hot a plug. (A hot plug transfers heat away from the electrode slowly - a cold plug transfers it away quickly.) 4 If the tip of the insulator nose is covered with sooty black deposits, then this is indicative that the mixture is too rich. Should the plug be black and oily, then it is likely that the engine is fairly worn, as well as the mixture being too rich. 5 The spark plug gap is of considerable importance, as, if it is too large or too small the size of the spark and its efficiency will be seriously impaired. The spark plug gap should be set to the gap shown in the Specifications for the best results. 6 To set it, measure the gap with a feeler gauge, and then bend open, or close, the outer plug electrode until the correct gap is achieved. The centre electrode should never be bent as this may crack the insulation and cause plug failure, if nothing worse. 7 When fitting new plugs, check that the plug seats in the cylinder head are quite clean. Refit the leads from the distributor in the correct firing order, which is 1-3-4-2; No 1 12.2 Ignition switch and lock Fig. 4.15 Spark plug connections on 1116 cc and 1301 cc engines (Sec 11) 11.7 Distributor cap HT lead markings cylinder being the one nearest the flywheel housing (903 cc) or timing belt (1116 or 1301 cc). The distributor cap is marked with the HT lead numbers to avoid any confusion. Simply connect the correctly numbered lead to its respective spark plug terminal (photo). 12 Ignition switch removal and refitting 1 1 Access to the steering column lock/ignition switch is obtained after removing the steering wheel and column shrouds (Chapter 10) and the column switch unit (Chapter 9). 2 In the interest of safety, disconnect the battery negative lead and the ignition switch wiring plug (photo). 3 Insert the ignition key and turn to the STOP position (photo). 4 Pull the two leads from the switch. 5 Turn the ignition key to MAR. 6 Using a screwdriver depress the retaining tabs (1) (Fig. 4.16) and release the ignition switch. 7 Set the switch cam (2) so that the notches (3) are in alignment. 8 Insert the switch into the steering lock and engage the retaining tabs. 9 Turn the ignition key to STOP and connect the two leads. 10 Reconnect the battery and refit the steering wheel, switch and shrouds. 11 Removal and refitting of the steering 12.3 Ignition key positions 1 AVV (Start) 2 Park (Parking lights on) 3 Stop (Lock) 4 MAR (Ignition) It’s often difficult to insert spark plugs into their holes without cross-threading them. To avoid this possibility, fit a short piece of rubber hose over the end of the spark plug. The flexible hose acts as a universal joint, to help align the plug with the plug hole. Should the plug begin to cross-thread, the hose will slip on the spark plug, preventing thread damage. column lock is described in Chapter 10. Note: The ignition key is removable when set to the STOP position and all electrical circuits will be off. If the interlock button is pressed, the key can be turned to the PARK position in order that the parking lamps can be left on and the steering lock engaged, but the key can be withdrawn. Fig. 4.16 Typical ignition switch (Sec 12) 1 Retaining tabs 2 Switch cam 3 Alignment notches 4 Locating projection Ignition system 4•9 Fault finding - mechanical breaker ignition system Engine fails to start Engine starts and runs but misfires m m m m m m m m m m m m m m m Loose battery connections Discharged battery Oil in contact points Disconnected ignition leads Faulty condenser Engine overheats, lacks power m Seized distributor weights m Perforated vacuum pipe m Incorrect ignition timing Faulty spark plug Cracked distributor cap Cracked rotor arm Worn advance mechanism Incorrect spark plug gap Incorrect contact points gap Faulty condenser Faulty coil Incorrect timing Poor engine/transmission earth connections Fault finding - Digiplex (electronic) ignition system Engine fails to start Engine lacks power, high fuel consumption m m m m m m Incorrect ignition advance m TDC sensor incorrectly set m Distributor vacuum hose blocked Excessive gap on TDC sensor TDC or engine speed sensor short circuited or earthed Defective ignition control unit Control unit multi-plug contacts corroded Defective coil 4 8•1 Chapter 8 Braking system For modifications, and information applicable to later models, see Supplement at end of manual Contents Brake disc - inspection, renovation or renewal . . . . . . . . . . . . . . . . . 6 Brake drum - inspection, renovation or renewal . . . . . . . . . . . . . . . . 8 Brake pedal - removal and refitting . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Caliper - removal, overhaul and refitting . . . . . . . . . . . . . . . . . . . . . . 5 Disc pads - inspection and renewal . . . . . . . . . . . . . . . . . . . . . . . . . 3 Fault finding - braking system . . . . . . . . . . . . . . . . See end of Chapter General description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Handbrake - adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Handbrake cable - renewal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Hydraulic hoses and pipes - inspection and renewal . . . . . . . . . . . . 11 Hydraulic system - bleeding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Master cylinder - removal, overhaul and refitting . . . . . . . . . . . . . . . Pressure regulating valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Rear brake shoes - inspection and removal . . . . . . . . . . . . . . . . . . . Rear wheel cylinder - removal, overhaul and refitting . . . . . . . . . . . . Stop lamp switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Vacuum servo unit - description . . . . . . . . . . . . . . . . . . . . . . . . . . . . Vacuum servo unit - removal and refitting . . . . . . . . . . . . . . . . . . . . Vacuum servo unit - servicing and testing . . . . . . . . . . . . . . . . . . . . 12 2 9 10 4 7 19 13 15 14 Degrees of difficulty Easy, suitable for novice with little experience 1 Fairly easy, suitable for beginner with some experience 2 Fairly difficult, suitable for competent DIY mechanic 3 Difficult, suitable for experienced DIY mechanic 4 Very difficult, suitable for expert DIY or professional 5 Specifications System type ........................................... Dual-circuit hydraulic with servo unit and pressure regulating valve. Discs front, drums rear. Handbrake mechanical to rear wheels. Disc brakes Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Disc diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Disc thickness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Minimum regrind thickness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Minimum wear thickness of pad friction material . . . . . . . . . . . . . . . . . . Caliper cylinder diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Single cylinder, sliding caliper 227.0 mm (8.94 in) 10.7 to 10.9 mm (0.42 to 0.43 in) 9.0 mm (0.35 in) 1.5 mm (0.06 in) 48.0 mm (1.89 in) 8 Drum brakes Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Drum internal diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Maximum regrind diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Minimum shoe lining friction material thickness . . . . . . . . . . . . . . . . . . . Cylinder diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Single cylinder, with automatic adjusters 185.24 to 185.53 mm (7.30 to 7.31 in) 187.0 mm (7.37 in) 1.5 mm (0.06 in) 19.05 mm (0.75 in) Master cylinder bore diameter 19.05 mm (0.75 in) Vacuum servo diameter ........................ ............................... Hydraulic fluid type/specification ..................... 158.5 mm (6.0 in) Hydraulic fluid to DOT 3 or 4, or SAE J1703C System capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.33 litre (0.58 pint) Torque wrench settings Nm 53 10 20 25 20 Caliper mounting bracket bolts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Rear wheel cylinder mounting bolts . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pressure regulating valve mounting bolts . . . . . . . . . . . . . . . . . . . . . . . Master cylinder mounting nuts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Rear brake backplate bolts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . lbf ft 39 7 15 18 15 8•2 Braking system 2 Maintenance 1 2 3 4 Fig. 8.1 Components of the braking system (LHD shown) (Sec 1) Caliper 5 Cap and fluid level sensor 8 Pipeline Hose 6 Vacuum servo unit 9 Hose Master cylinder 7 Rear wheel cylinder 10 Pressure regulating valve Fluid reservoir 1 1 At the weekly service check, inspect the fluid level in the master cylinder reservoir. Topping up should only be required at very infrequent intervals and should only be necessary owing to the need for extra fluid in the hydraulic system caused by wear of the friction material of the disc pads and shoe linings. 2 The need for frequent or regular topping up will be due to a leak in the system, probably from a hydraulic cylinder seal or a flexible hose. Correct the problem immediately. 3 Use only clean new fluid for topping up. lt must be of the specified type and have been stored in a closed container and not have been shaken for at least 24 hours (photo). 4 At regular intervals, check the hoses and pipelines for condition. Adjust the handbrake if the lever travel becomes excessive. Check the condition and security of the brake servo vacuum hose. All these operations are described later in this Chapter. The braking system is of four wheel hydraulic type with discs on the front wheels and drums on the rear. The hydraulic system is of dual-circuit type and incorporates a pressure regulator valve to limit pressure to the rear brakes during heavy braking to prevent rear wheel lock up. A vacuum servo unit is fitted to some models. The handbrake is mechanically operated on the rear wheels. 2.3 Fluid reservoir cap and float for warning switch 3.2A Removing a disc pad locking block clip 1 Jack up the front of the car and remove the roadwheels. 2 Extract the spring clips and slide out the locking blocks (photos). 3 On SX versions, carefully disconnect the wear sensor lead connecting plug. 4 Lift the caliper body from the disc and inspect the thickness of the friction material on each pad (photo). If it is 1.5 mm (0.06 in) or less, renew the pads. 5 Withdraw the pads and the anti-rattle springs. 6 Brush away any dust and dirt from the caliper, taking care not to inhale the dust - this contains asbestos and is thus potentially injurious to health. 7 As the new pads are thicker than the old ones, the caliper piston must be depressed 3.2B Removing a locking block 3.4 Removing the caliper unit 3.8A Disc pad and anti-rattle spring 1 General description 3 Disc pads inspection and renewal 2 Braking system 8•3 3.8B Cylinder body located on caliper bracket 4.7 Rear brake assembly 4.11 Rear hub showing cut-outs on rear face for shoe self-adjuster bosses into its cylinder to accommodate them. This will cause the fluid level to rise in the reservoir. Anticipate this by syphoning some out beforehand, but take care not to let it drip onto the paintwork - it acts as an effective paint stripperl 8 Refit the anti-rattle springs, the pads (friction lining-to-disc), the cylinder body, the locking blocks and their retaining clips (photos). 9 Refit the roadwheel and apply the footbrake hard, several times, to bring the pads into contact with the brake disc. 10 Renew the pads on the opposite brake. The pads should always be renewed in axle sets. 11 Top up the fluid reservoir. Note also into which holes in the shoe web the return springs are connected. Sketch the shoes or mark the holes on the new shoes with quick drying paint if you are doubtful about remembering (photo). 8 Undo the steady springs by depressing and rotating their caps a quarter turn to disengage the slot from the pin. On later models a U-shaped steady spring is used. Depress and slide it out. 9 Rotate the hub until the cut-outs in its rear flange face are in alignment with the shoe self-adjusters. 10 Pivot the trailing shoe on the self-adjuster post and disengage the ends of the shoe from the slot in the wheel cylinder tappet and from the lower anchor block. 11 Work the shoe up the self-adjuster pivot post until the self-adjuster boss enters the cut-out in the hub flange. The shoe can now be withdrawn (photo). 12 Once off the self-adjuster post, the pull-off spring tension is eased, as the shoe can move towards the other, so the springs can be unhooked. 13 Remove the leading shoe in a similar way. 14 The new shoes will already be fitted with new self-adjusters. 15 Fit the new shoes to their self-adjuster posts, making sure that the handbrake shoe lever is correctly located. Engage the ends of the shoes. 16 Using a wooden or plastic-faced mallet, tap the shoes inwards against the friction of their self-adjuster coil springs. This will have the effect of reducing the overall diameter of the shoes to facilitate fitting of the shoe return springs and to allow the brake drum to slide over them. 17 Using pliers, reconnect the upper (longer) and lower shoe return springs. 18 Hold the steady pins in position from the rear of the backplate. Fit the small coil springs and the retaining cap, again using pliers to grip the cap and to depress and turn it to engage the pin. On later models fit the U-shaped springs. 19 Before refitting the drum, clean it out and examine it for grooves or scoring (refer to Section 8). 20 Fit the drum and the roadwheel. 21 Apply the brakes two or three times to position the shoes close to the drum. 22 Renew the shoes on the opposite brake in a similar way. 23 The handbrake should be automatically adjusted by the action of the shoe adjuster. If the handbrake control lever has excessive travel, refer to Section 16 for separate adjusting instructions. 4 Rear brake shoes inspection and renewal 2 1 Jack up the rear of the car and remove the roadwheels. 2 Fully release the handbrake. 3 Unscrew and remove the drum securing bolts. One of these is a long locating spigot for the roadwheel. 4 Pull off the drum. lf it is tight, clean off the rust at its joint with the hub flange, and apply a little penetrating fluid. Two bolts may be screwed into the drum securing bolt holes if necessary and the drum thus eased off the hub. The securing bolt holes are tapped for this purpose. 5 Brush away all the dust and dirt from the shoes and operating mechanism, taking care not to inhale it. 6 The friction linings fitted as original equipment are of the bonded type and the rivet heads normally used as a guide to wear are not, of course, fitted. However, if the thickness of the friction linings is down to 1.5 mm (0.06 in) or less, the shoes must be renewed. Always purchase new or factory relined brake shoes. 7 Before removing the brake shoes, note the way in which the shoes are positioned, with respect to leading and trailing ends (the end of the shoe not covered by lining material). 5 Caliper - removal, overhaul and refitting 4 Note: Purchase a repair kit in advance of overhaul. 1 Jack up the front roadwheel and remove it. 2 Brush away all dirt from the caliper Fig. 8.2 Exploded view of caliper (Sec 5) 8 8•4 Braking system assembly and the flexible pipe, particularly the fixing bracket and union at the car end of the flexible pipe. 3 Have ready a container suitable to catch the brake fluid, and sheets of clean newspaper on which to put parts. 4 Take out the spring clips and locking blocks, and take the caliper off the support bracket. 5 Disconnect the hydraulic flexible pipe at the under wing support bracket and cap both pipe ends. It may help to prevent loss of fluid if the vent in the reservoir cap is sealed with adhesive tape, to create a vacuum. 6 Remove the caliper to the bench or other work surface, and clean it thoroughly with hydraulic fluid or methylated spirit. 7 Depress the piston until the dust excluding boot can be removed. 8 Now apply air pressure to the flexible hose and eject the piston. Quite a low pressure is required for this, such as can be generated with a hand or foot operated pump. 9 Pick out the piston seal from its groove in the cylinder. Use a sharp probe, but take care to avoid scratching the cylinder bore. 10 Examine the surface of the piston and cylinder bore. If either is corroded, scored or shows metal-to-metal rubbed areas, the complete assembly should be renewed. 11 If the components are in good condition, discard the oil seals, clean the piston and cylinder and fit the new seal for the piston. This is included in the repair kit. Use the fingers only to manipulate it into its groove. 12 Lubricate the piston with clean hydraulic fluid and insert it partially into the cylinder. 13 Fit the new dust excluding boot to its projecting end, push the piston fully into the cylinder and engage the dust excluder with the rim of the cylinder. 14 Refit the caliper, reconnect the flexible hose, then bleed the front hydraulic circuit (refer to Section 12). 6 Brake disc - inspection, renovation or renewal 2 1 Whenever the front disc pads are being checked for wear, take the opportunity to inspect the discs for deep scoring or grooving. After a high mileage the disc may become reduced in thickness away from the extreme outer edge of the disc. lf this wear is rapid, it is possible that the friction pads are of too hard a type. 2 If the disc has evidence of many tiny cracks, these may be caused by overheating due to a seized caliper piston in the “applied” position. 3 The foregoing conditions may be corrected by regrinding the disc provided that the thickness of the disc is not reduced below that specified by such action. Alternatively, fit a new disc. 4 To remove a disc, take off the caliper and Fig. 8.3 Sectional view of caliper (Sec 5) 1 Pads 2 Dust excluder 3 Piston seal 4 Piston 5 Cylinder body pads as described in Sections 3 and 5. Tie the caliper up, out of the way. 5 Knock back the tabs of the lockplates and unbolt the caliper support bracket from the hub carrier. 6 Unscrew and remove the two bolts which hold the disc assembly to the hub. One of these bolts is for wheel locating purposes. 7 Pull the disc from the hub. 8 Refitting is a reversal of the removal process. If the disc has excessive run-out, repositioning it in relation to the hub may bring it within tolerance by cancelling out the run-out characteristics in the hub and disc, once the most suitable fitted position has been found. 7 Rear wheel cylinder removal, overhaul and refitting 4 Note: Purchase a repair kit in advance of overhaul. 1 If fluid seepage is observed from the ends of the rear wheel cylinder when the brake drum has been removed, the seals are leaking and immediate action must be taken. 2 Although the cylinder can be dismantled without taking it from the backplate, this is not recommended due to the possibility of under wing dirt and mud dropping onto the components as work proceeds. 3 Remove the brake shoes, as described in Section 4. 4 Disconnect the hydraulic line from the wheel cylinder and cap the open end of the pipe. lt may help to reduce the loss of fluid if the vent hole in the reservoir cap is taped over to create a vacuum. 5 Unscrew and remove the setscrews which hold the cylinder to the backplate and withdraw the cylinder. Prise off the rubber dust excluding boots. 6 Apply gentle air pressure from a hand or foot operated pump to eject the pistons and spring. Alternatively, tap the end of the cylinder on a piece of hardwood and the pistons should move out. 7 Inspect the piston and cylinder bore surfaces for scoring, corrosion or evidence of metal-to-metal rubbing areas. lf these are found, discard the assembly and purchase a new one. 8 If the components are in good condition, note which way round the lips are fitted, then discard the seals and boots and wash the pistons and cylinder bore in clean hydraulic fluid or methylated spirit. 9 Manipulate the new seals into position, using the fingers only for this job. 10 Dip the pistons in clean hydraulic fluid and insert them with the coil spring and washers into the cylinder. 11 Fit the new dust excluding boots. 12 Refit the wheel cylinder to the backplate, reconnect the hydraulic pipe, then refit the shoes, the drum and the roadwheel. 13 Bleed the rear hydraulic circuit as described in Section 12. 8 Brake drum - inspection, renovation or renewal 2 1 Whenever the rear brake linings are being checked for wear, take the opportunity to inspect the internal surfaces of the brake drums. 2 If the drums are grooved or deeply scored, they may be reground, provided that their new internal diameter will not then exceed the specified dimension. If it will, or the drum is cracked, it must be renewed. 3 Removal and refitting of a brake drum is described in Section 4. Fig. 8.4 Exploded view of a rear wheel cylinder (Sec 7) Braking system 8•5 9 Master cylinder - removal, overhaul and refitting 4 Note: Purchase a repair kit in advance of overhaul. 1 The master cylinder is mounted on the front face of the brake vacuum servo unit (55 and 70 models) or directly to the bulkhead (45 models). 2 Cover the front wings with polythene sheeting or similar material, in case hydraulic fluid spills onto the paintwork of the car during removal of the cylinder. 3 Detach the leads from the terminals on the reservoir cap, then unscrew and remove the cap and float. 4 Unscrew the pipe unions and prise the pipes carefully away from the master cylinder. Cap the open ends of the pipes and catch any fluid leaking from the master cylinder in a suitable container. 5 Unscrew the mounting nuts and withdraw the master cylinder from the bulkhead or from the servo unit. 6 Clean away all external dirt and tip out the fluid from the reservoir and cylinder body. 7 The fluid reservoirs need not be removed from the master cylinder but if they are, renew the rubber sealing collars when refitting. 8 Grip the master cylinder in a vice, then unscrew and remove the end plug. Catch the coil spring. 9 Using a thin rod, apply pressure to the end of the primary piston then unscrew and remove the two stop bolts and sealing washers. 10 The internal piston assemblies with seals and springs can now be pushed out of the cylinder body. Keep all the components in Fig. 8.5 Sectional view of master cylinder (Sec 9) 1 2 3 4 5 6 Cylinder body Spring and cup Inlet from reservoir Secondary piston Seal Fluid outlet to front brakes 7 8 9 10 12 Spring and cup Inlet from reservoir Primary piston Seal Stop bolts 13 14 15 16 Spacer Springs Seal End plug and fluid outlet to rear brakes 1 4 3 2 Fig. 8.6 Exploded view of master cylinder (Sec 9) 1 Cylinder body 2 Secondary piston 3 Primary piston 4 Stop bolt Fig. 8.7 Sectional view of vacuum servo unit (Sec 9) 1 Master cylinder 2 Master cylinder primary piston 3 Non-return valve 4 Front seal 5 Pushrod 6 Front chamber 7 Vacuum port 8 Plunger 9 Seal centraliser 10 Valve 11 Spring cup 12 Spring cup 13 Filter 14 Pushrod 15 Dust excluding boot 16 Return spring 17 Valve spring 18 19 20 21 22 23 24 25 26 27 28 29 30 31 Valve cup Rear seal Seal Cup Rear chamber Backing plate Diaphragm Vacuum piston Front shell Return spring Cup Guide bush Seal Rear shell A = Projection of pushrod above vacuum cylinder face 8 8•6 Braking system 10.4 Pressure regulating valve bracket and tension spring their originally fitted sequence and note in which direction the seal lips are located. 11 Inspect the surfaces of the piston and cylinder bore. If scoring, corrosion or metal-to-metal rubbing areas are evident, renew the master cylinder complete. 12 If the components are in good condition, discard the oil seals and manipulate the new ones into position, using the fingers only. 13 Refit by reversing the removal operations; apply pressure to the piston ends so that the stop bolts can be fitted, then tighten the end plug. Make sure that the grooves in the pistons engage in the stop bolts. 14 Before refitting the master cylinder to the servo, measure the projection of the servo piston pushrod. When the master cylinder is fitted, there must be a clearance (see A in Fig. 8.7) between the end of the pushrod and the primary piston end face of between 0.825 and 1.025 mm (0.03 and 0.04 in). A depth gauge will be required for these measurements, the reference point being the mating surfaces of the master cylinder and the vacuum servo. 15 Alter the adjusting screw on the servo as necessary and lock it by applying locking fluid to the threads on completion. Fig. 8.9 Components of the pressure regulating valve (Sec 10) Fig. 8.8 Pressure regulating valve (Sec 10) 16 Bolt the master cylinder to the vacuum servo or bulkhead, then reconnect the pipelines and reservoir cap leads. 17 Bleed the complete hydraulic system, as described in Section 12. 10 Pressure regulating valve 3 1 The pressure regulating valve is a load proportioning valve which restricts the hydraulic pressure to the rear brakes according to car weight during heavy applications of the brake pedal. This prevents the rear wheels locking. 2 A faulty or non-operational valve should be renewed complete, no repair being possible. 3 To remove the valve, unscrew the pipe unions and disconnect the hydraulic pipes from the valve. Cap the ends of the pipes to prevent loss of fluid. 4 Unbolt the valve mounting bracket, withdraw it and disconnect the tension spring (photo). 5 Refit the new valve and then adjust it in the following way. 6 Have the car standing on a level floor. 7 The car should be normally loaded (kerb weight) with fuel, oil, spare wheel etc. Load the luggage compartment immediately behind the seat back with: 65 kg (143 lbs) on three-door models or Fig. 8.10 Weight attachment point for pressure regulating valve adjustment (Sec 10) 1 Fixing bolt 2 Bracket eye 55 kg (121 lbs) on five-door models 8 Refer to Fig. 8.10 and slacken the valve bracket securing bolt (1). 9 Attach a 6.0 kg (13.2 lb) weight to the bracket eye (2) as shown and then tighten the bracket securing bolt. 10 Bleed the braking system if a new valve has been fitted. Bleeding will not of course be required if only adjustment has been carried out to an existing valve. 11 Hydraulic hoses and pipes inspection and renewal 3 Flexible hoses 1 Periodically, all brake pipes, pipe connections and unions should be completely and carefully examined. 2 First examine for signs of leakage where the pipe unions occur. Then examine the flexible hoses for signs of chafing and fraying and, of course, leakage. This is only a preliminary part of the flexible hose inspection, as exterior condition does not necessarily indicate the interior condition, which will be considered later. 3 Flexible hoses are always mounted at both ends in a rigid bracket attached to the body or a sub-assembly. To remove them, it is necessary first of all to unscrew the pipe unions of the rigid pipes which go into them. Fig. 8.11 Typical hydraulic hose connection (Sec 11) Braking system 8•7 11.3 Front hydraulic hose bracket Fig. 8.12 Bleeding a rear wheel cylinder (Sec 12) 12.8 Caliper bleed screw with dust cap fitted The hose ends can then be unclipped from the brackets. The mounting brackets, particularly on the body frame, are not very heavy gauge and care must be taken not to wrench them off (photo). 4 With the flexible hose removed, examine the internal bore. If it is blown through first, it should be possible to see through it. Any specks of rubber which come out, or signs of restriction in the bore, mean that the inner lining is breaking up and the pipe must be renewed. 5 When refitting the flexible hoses check they cannot be under tension, or rub, when the wheels are at the full range of suspension or steering movement. 6 Bleed the system (see Section 12) on completion. reversal of the removal procedure. If the rigid pipes have been made up, it is best to get all the sets bends in them before trying to fit them. Also, if there are any acute bends ask your supplier to put these in for you on a tube bender. Otherwise, you may kink the pipe and thereby restrict the bore area and fluid flow. 11 Bleed the system (see Section 12) on completion. 9 Engage the help of an assistant. 10 Push one end of the bleed tube onto the flrst bleed screw and immerse the other end of the glass jar which should contain enough hydraulic fluid to cover the end of the tube. 11 Open the bleed screw one half a turn and have your assistant depress the brake pedal fully then slowly release it. Tighten the bleed screw at the end of each pedal downstroke to obviate any chance of air or fluid being drawn back into the system. 12 Repeat this operation until clean hydraulic fluid, free from air bubbles, can be seen coming through into the jar. 13 Tighten the bleed screw at the end of a pedal downstroke and remove the bleed tube. Bleed the remaining screws in a similar way. Rigid pipes 7 Inspect the condition of the braking system rigid pipelines at frequent intervals. They must be cleaned off and examined for any signs of dents (or other percussive damage) and rust and corrosion. Rust and corrosion should be scraped off and, if the depth of pitting in the pipes is significant, they will need renewal. This is particularly likely in those areas underneath the car body and along the rear axle where the pipes are exposed to the full force of road and weather conditions. 8 Rigid pipe removal is usually straightforward. The unions at each end are undone, the pipe and union pulled out, and the centre sections of the pipe removed from the body clips where necessary. Underneath the car, exposed unions can sometimes be very tight. As one can use only an open-ended spanner and the unions are not large, burring of the flats is not uncommon when attempting to undo them. For this reason, a self-locking grip wrench (Mole) is often the only way to remove a stubborn union. 9 Rigid pipes which need renewal can usually be purchased at any garage where they have the pipe, unions and special tools to make them up. All they need to know is the total length of the pipe, the type of flare used at each end with the union, and the length and thread of the union. Fiat is metric, remember. 10 Fitting your new pipes is a straightforward 12 Hydraulic system bleeding 3 1 If the master cylinder or the pressure regulating valve has been disconnected and reconnected then the complete system (both circuits) must be bled. 2 If a component of one circuit has been disturbed then only that particular circuit need be bled. 3 The two disc brakes comprise the front circuit and the two rear brakes the rear circuit. 4 Unless the pressure bleeding method is being used, do not forget to keep the fluid level in the master cylinder reservoir topped up to prevent air from being drawn into the system which would make any work done worthless. 5 Before commencing operations, check that all system hoses and pipes are in good condition with all unions tight and free from leaks. 6 Take great care not to allow hydraulic fluid to come into contact with the vehicle paintwork as it is an effective paint stripper. Wash off any spilled fluid immediately with cold water. 7 As the system on 55 and 70 models incorporates a vacuum servo, destroy the vacuum by giving several applications of the brake pedal in quick succession. The car should be loaded with enough weight to actuate the pressure regulating valve before bleeding commences. Bleeding - using a one way valve kit 14 There are a number of one-man, one-way brake bleeding kits available from motor accessory shops. It is recommended that one of these kits is used wherever possible as it will greatly simplify the bleeding operation and also reduce the risk of air or fluid being drawn back into the system quite apart from being able to do the work without the help of an assistant. 15 To use the kit, connect the tube to the bleedscrew and open the screw one half a turn. 16 Depress the brake pedal fully and slowly release it. The one-way valve in the kit will prevent expelled air from returning at the end of each pedal downstroke. Repeat this operation several times to be sure of ejecting all air from the system. Some kits include a translucent container which can be positioned so that the air bubbles can actually be seen being ejected from the system. 17 Tighten the bleed screw, remove the tube and repeat the operations on the remaining brakes. 18 On completion, depress the brake pedal. If it still feels spongy repeat the bleeding operations as air must still be trapped in the system. Bleeding - two man method Bleeding - using a pressure bleeding kit 8 Gather together a clean glass jar and a length of rubber or plastic tubing which will be a tight fit on the brake bleed screws (photo). 19 These kits too are available from motor accessory shops and are usually operated by air pressure from the spare tyre. 8 8•8 Braking system 20 By connecting a pressurised container to the master cylinder fluid reservoir, bleeding is then carried out by simply opening each bleed screw in turn and allowing the fluid to run out, rather like turning on a tap, until no air is visible in the expelled fluid. 21 By using this method, the large reserve of hydraulic fluid provides a safeguard against air being drawn into the master cylinder during bleeding which often occurs if the fluid level in the reservoir is not maintained. 22 Pressure bleeding is particularly effective when bleeding “difficult” systems or when bleeding the complete system at time of routine fluid renewal. All methods 23 When bleeding is completed, check and top up the fluid level in the master cylinder reservoir. 24 Check the feel of the brake pedal. If it feels at all spongy, air must still be present in the system and further bleeding is indicated. Failure to bleed satisfactorily after a reasonable period of the bleeding operation, may be due to worn master cylinder seals. 25 Discard brake fluid which has been expelled. lt is almost certain to be contaminated with moisture, air and dirt making it unsuitable for further use. Clean fluid should always be stored in an airtight container as it absorbs moisture readily (hygroscopic) which lowers its boiling point and could affect braking performance under severe conditions. 13 Vacuum servo unit description A vacuum servo unit is fitted into the brake hydraulic circuit on 55 and 70 models in series with the master cylinder, to provide assistance to the driver when the brake pedal is depressed. This reduces the effort required by the driver to operate the brakes under all braking conditions. The unit operates by vacuum obtained from the induction manifold and comprises basically a booster diaphragm and non-return valve. The servo unit and hydraulic master cylinder are connected together so that the servo unit piston rod acts as the master cylinder pushrod. The driver’s braking effort is transmitted through another pushrod to the servo unit piston and its built-in control system. The servo unit piston does not fit tightly into the cylinder, but has a strong diaphragm to keep its edges in constant contact with the cylinder wall, so assuring an air tight seal between the two parts. The forward chamber is held under vacuum conditions created in the inlet manifold of the engine and, during periods when the brake pedal is not in use, the controls open a passage to the rear chamber so placing it under vacuum conditions as well. When the brake pedal is depressed, the vacuum passage to the rear chamber is cut off and the chamber opened to atmospheric pressure. The consequent rush of air pushes the servo piston forward in the vacuum chamber and operates the main pushrod to the master cylinder. The controls are designed so that assistance is given under all conditions and, when the brakes are not required, vacuum in the rear chamber is established when the brake pedal is released. All air from the atmosphere entering the rear chamber is passed through a small air filter. Under normal operating conditions, the vacuum servo unit is very reliable and does not require overhaul except at very high mileages. In this case, it is far better to obtain a service exchange unit, rather than repair the original unit. It is emphasised that the servo unit assists in reducing the braking effort required at the foot pedal and in the event of its failure, the hydraulic braking system is in no way affected except that the need for higher pressures will be noticed. 14 Vacuum servo unit servicing and testing 1 Regularly, check that the vacuum hose which runs between the servo unit and the inlet manifold is in good condition and is a tight fit at both ends. 2 If broken or badly clogged, renew the air filter which is located around the brake pedal push rod. Access to this is obtained by disconnecting the pushrod from the cross-shaft or pedal arm, withdrawing the pushrod, dust excluding boot and end cap. 3 If the new filter is cut diagonally from its centre hole, future renewal can be carried out without the need for disconnection of the pushrod. 4 If the efficiency of the servo unit is suspect, it can be checked out in the following way. 5 Run the engine, then switch off the ignition. Depress the footbrake pedal; the distinctive in-rush of air into the servo should be clearly heard. It should be possible to repeat this operation several times before the vacuum in the system is exhausted. 6 Start the engine and have an assistant apply the footbrake pedal and hold it down. Disconnect the vacuuum hose from the servo. There should not be any in-rush of air into the servo through the connecting stub. lf there is, the servo diaphragm is probably faulty. During this test, expect the engine to idle roughly, unless the open end of the hose to the inlet manifold is plugged. Reconnect the hose. 7 With the engine off, depress the brake pedal fully. Start the engine with the brake pedal still depressed; the pedal should be felt to go down fractionally. 8 If the results of these tests are not satisfactory, remove the unit and fit a new one as described in the next Section. 15 Vacuum servo unit removal and refitting 3 1 Syphon as much fluid as possible out of the master cylinder reservolr. 2 Disconnect electrical leads from the terminals in the reservoir cap then uncouple the rigid pipelines from the master cylinder body. Be prepared to catch leaking fluid and plug the open ends of the pipelines. 3 The master cylinder can be unbolted now from the servo unit, or detached later when the complete assembly is withdrawn. 4 Working inside the car, disconnect the servo pushrod from the pedal then remove the servo mounting nuts. 5 Withdraw the servo assembly into the engine compartment, then remove it to the bench. lf the master cylinder is still attached, cover the wings with protective sheeting, in case brake fluid is spilled during removal. 6 Refitting is a reversal of the removal process, but adjust the pushrod clearance as described in Section 9. On completion of refitting, bleed the complete hydraulic system as described in Section 12. Note: Where the help of an assistant is available, the servo pushrod need not be disconnected from the pedal. The rod is a sliding fit in the servo and the servo can be simply pulled off the rod. Refitting without having disconnected the rod from the pedal can be difficult unless the help of an assistant is available. 16 Handbrake - adjustment 1 Adjustment is normally automatic, by the movement of the rear brake shoes on their automatic adjusters. However, owing to cable stretch, supplementary adjustment is occasionally required at the control lever adjuster nut. The need for this adjustment is usually indicated by excessive movement of the control lever when fully applied. 1 The rear brakes should be fully applied when the handbrake control lever has been pulled over four or five notches. 2 If adjustment is required, release the 16.2 Handbrake adjuster nuts Braking system 8•9 locknut and turn the adjuster nut on the handbrake primary rod (photo). 3 Raise the rear roadwheels and check that they turn freely when the handbrake lever is fully released. 17 Handbrake cable renewal 1 1 There are two cables, either of which may be renewed independently 2 Disconnect the cable, which is to be renewed, from the shoe lever at the brake backplate. 3 Disconnect the longer cable from the primary link or rod and release the cable from its retainers. On later models with a plastic fuel tank, a cable bracket is moulded into the side of the tank (photo). 17.4 Handbrake cable pulley 17.3 Handbrake cable guide on fuel tank 4 Disconnect the shorter cable from the pivot lever at the pulley on the rear axle (photo). 5 Refit the new cables by reversing the removal operations and then adjust as described in the preceding Section. 18 Brake pedal removal and refitting 1 1 The operations are described in conjunction with the clutch pedal in Chapter 5, Section 4. 2 The brake pedal pushrod will slide out of the servo unit as the pedal is withdrawn. 19 Stop lamp switch 1 1 The brake stop lamp switch is of plunger type acting on the pedal arm. 2 Adjust the position of the switch by turning the locknuts until the stop lamps illuminate when the pedal arm is depressed through 1.0 mm (0.039 in). Fig. 8.13 Handbrake components (Sec 17) Fault finding - braking system Excessive pedal travel Excessive effort required to stop car m m m m m m m m m m m Pads or shoes excessively worn Incorrect pedal or servo pushrod adjustment Automatic adjusters faulty Seized wheel cylinder or caliper piston Master cylinder seals worn Pedal feels spongy or soggy m m m m m Air in hydraulic system Low fluid level Loose connections Flexible hose perished Defective wheel cylinder or caliper seal Pedal feels springy m New pads or linings not bedded-in m Master cylinder mounting loose Worn or contaminated linings or pads Incorrect grade of lining or pad material Servo vacuum hose leaking or disconnected Faulty servo or non-return valve (55 or 70 models) Seized caliper or wheel cylinder piston One circuit defective on dual circuit hydraulic system Brakes pull to one side m Friction linings contaminated on one side of car m Seized hydraulic piston on one side of car m Different types of linings fitted on different sides of car, or new linings on one side only m Seized automatic adjuster on one side of car Brakes drag m Handbrake linkage overadjusted or seized m Seized caliper or wheel cylinder piston Pedal vibrates when brakes applied Brakes squeal m m m m m Drums or discs rusty or damp (temporary fault - no action necessary) m Dust or grit in brake drums m Linings excessively worn Discs or drums distorted Friction linings excessively worn Loose backplate or caliper mounting bolts Wear in steering or suspension components 8 9•1 Chapter 9 Electrical system For modifications, and information applicable to later models, see Supplement at end of manual Contents Alternator - maintenance and precautions . . . . . . . . . . . . . . . . . . . . 3 Alternator - overhaul . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Alternator - removal and refitting . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Battery - inspection, charging, removal and refitting . . . . . . . . . . . . 2 Central door locking system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 Check control (warning module) system . . . . . . . . . . . . . . . . . . . . . . 34 Cigar lighter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 Clocks - setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 Courtesy lamp switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Economy gauge (Econometer) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 Electrically-operated front door windows . . . . . . . . . . . . . . . . . . . . . 31 Exterior lamps - bulb renewal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Fault finding - electrical system . . . . . . . . . . . . . . See end of Chapter Fuses and relays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 General description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Headlamp - removal and refitting . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Headlamp beam - alignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Headlamp bulb - renewal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Heated tailgate window - precautions and repair . . . . . . . . . . . . . . . 29 Horns . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Instrument panel - dismantling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Instrument panel - removal and refitting . . . . . . . . . . . . . . . . . . . . . . Interior lamps - bulb renewal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Radio/cassette - fitting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Rocker and push-button switches . . . . . . . . . . . . . . . . . . . . . . . . . . Speedometer drive cable - renewal . . . . . . . . . . . . . . . . . . . . . . . . . Starter motor - description and testing . . . . . . . . . . . . . . . . . . . . . . . Starter motor - overhaul . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Starter motor - removal and refitting . . . . . . . . . . . . . . . . . . . . . . . . . Steering column combination switch . . . . . . . . . . . . . . . . . . . . . . . . Tailgate contacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Tailgate wiper blade and arm - removal and refitting . . . . . . . . . . . . Tailgate wiper motor - removal and refitting . . . . . . . . . . . . . . . . . . . Voltage regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Washer system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Windscreen wiper blade and arm - removal and refitting . . . . . . . . . Windscreen wiper motor - removal and refitting . . . . . . . . . . . . . . . . 15 22 21 20 30 13 23 7 9 8 11 14 26 27 6 28 24 25 Degrees of difficulty Easy, suitable for novice with little experience 1 Fairly easy, suitable for beginner with some experience 2 Fairly difficult, suitable for competent DIY mechanic 3 Difficult, suitable for experienced DIY mechanic 4 Very difficult, suitable for expert DIY or professional 5 Specifications System type ........................................... 12 negative earth, battery alternator and pre-engaged starter Battery Except 70S . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70S . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 Ah 40 Ah Alternator Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Nominal voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Minimum brush (wear) length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Marelli, Valeo or Bosch 45A, 55A or 65A, with integral voltage regulator 14 V 6.0 mm (0.236 in) Starter motor Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Nominal power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Armature shaft endfloat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Minimum brush (wear) length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Marelli, Bosch or Femsa pre-engaged 0.8 kW or 1.0 kW 0.1 to 0.5 mm (0.0039 to 0.0197 in) 10.0 mm (0.39 in) Wiper blades Front . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Rear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Champion X-4801 (19 in) or X-4503 (18 in) Champion X-3303 9 9•2 Electrical system Fuses 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Circuit protected Stop lamps, direction indicator lamps, instrument panel warning lamps, tachometer economy gauge, check control system . . . . . . Windscreen wiper and washer, rear screen wiper/washer, check system panel illumination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Left front parking, right rear tail lamp, cigar lighter illumination, heater control and clock, digital clock illumination . . . . . . . . . . . . . Right front parking lamp and left rear tail lamp, instrument panel illumination and rear number plate lamp . . . . . . . . . . . . . . . . . . . . . Left-hand dipped headlamp, rear foglamps . . . . . . . . . . . . . . . . . . Right-hand dipped headlamp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Left-hand headlamp (main beam) . . . . . . . . . . . . . . . . . . . . . . . . . . Right-hand headlamp (main beam) . . . . . . . . . . . . . . . . . . . . . . . . . Engine cooling fan and horn (Comfort) . . . . . . . . . . . . . . . . . . . . . . Heater booster fan, digital clock map reading lamp . . . . . . . . . . . . Heated tailgate glass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Courtesy lamps, cigar lighter, radio power feed, disc pad sensors, economy gauge (ES models) . . . . . . . . . . . . . . . . . . . . . . Hazard warning lamps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Spare (Comfort), Horn (Super) . . . . . . . . . . . . . . . . . . . . . . . . . . . . Bulbs Headlamp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Front parking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Side repeater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Tail . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Stop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Reversing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Rear foglamp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Direction indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Rear number plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Courtesy lamp (roof) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Courtesy lamp (pillar) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Warning and indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Torque wrench settings Alternator mounting and adjustment nuts . . . . . . . . . . . . . . . . . . . . . . . Starter motor bolts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 General description The electrical system is of 12 volt negative earth type and employs a belt-driven alternator and a pre-engaged type starter motor. The models in the range are all adequately equipped with electrical accessories, while SX versions also have power windows and centralised door locking plus a check control system (Section 34). 2 Battery - inspection, charging, removal and refitting 2 1 The battery is of maintenance-free type and under normal circumstances, no topping up will be required, but regularly check that the electrolyte level is between the minimum and maximum lines on the translucent battery casing. 2 If the electrolyte level does drop below the Fuse rating (A) 10 20 7.5 7.5 10 10 10 10 25 20 20 10 10 20 Wattage 40/45 or Halogen H4 60/55 5 5 5 21 21 21 21 5 10 5 Wedge base Nm 50 48 minimum line, suspect a leak in the battery casing or that the alternator is overcharging. If the latter is the case, rectify the alternator fault and then prise out the two rectangular plugs from the top of the battery and top up with distilled or purified water. 3 Always keep the battery terminals clean and smear them with petroleum jelly to prevent corrosion. lbf ft 87 35 7 To remove the battery from the car, first disconnect the leads from the battery terminals (earth first) and then unscrew the securing clamp from the casing projection at the base of the casing (photo). 8 Lift the battery from its mounting platform. Refitting is a reversal of removal. Reconnect the earth cable last. If battery terminal corrosion has occurred, it may be neutralised by applying sodium bicarbonate or household ammonia. 4 The battery will normally be kept fully charged by the alternator, but it is possible for the battery to become discharged if the daily mileage is very low with much use being made of the starter and electrical accessories. 5 When the battery begins to deteriorate with age it may also require a boost from a mains charger. 6 Disconnect both battery leads before connecting the mains charger. 2.7 Battery clamp Electrical system 9•3 4.2A Alternator mounting 3 Alternator maintenance and precautions 1 To avoid damage to the alternator, the following precautions should be observed. 1 Disconnect the leads from the battery before connecting a mains charger to the battery terminals. 2 Never stop the engine by pulling off one of the battery leads. 3 Disconnect the battery if electric welding is to be carried out on the vehicle. 4 If using booster cables from another battery to start the car, make sure that they are connected positive to positive and negative to negative. 5 Maintenance consists of keeping the outside of the alternator clean, the electrical connections secure and the drivebelt correctly tensioned, see Chapter 2, Section 8. 4 Alternator removal and refitting 4.2B Alternator adjuster bolt 5.3A Alternator brush holder bolt 2 Release the mounting and adjuster link nuts and push the alternator as far as it will go in towards the engine (photos). 3 Slip the drivebelt from the pulley. 4 Remove the mounting and adjuster bolts and lift the alternator from the brackets on the engine. Remove downwards on 1116 cc and 1301 cc models. 5 Refitting is a reversal of removal, tension the drivebelt as described in Chapter 2, Section 8. economical to exchange it for a new or factory-reconditioned one, rather than renew worn components on the original unit. 5 Alternator - overhaul 3 1 Overhaul of the alternator should be limited to renewal of the brushes. If the unit has covered a high mileage, it will be found more Brush renewal (Marelli alternator) 2 Unscrew the nuts and take off the rear cover. 3 Unscrew the two small bolts and withdraw the brush holder (photos). 4 Fit the new brush holder which is supplied complete with brushes, by reversing the removal operations. Brush renewal (Bosch alternator) 5 Where applicable, remove the radio suppression condenser (capacitor) from the rear end frame (one screw and washer, and a plug-in connection). 6 Undo the two screws which retain the brush holder to the rear frame of the alternator, then 1 Note: Depending on the model, access to the alternator from above may be poor in which case it will be necessary to work from the underside of the vehicle, through the right-hand wheel arch (after removing the roadwheel and the lower undershield). Refer to Chapter 13 for details. 1 Disconnect the leads from the rear of the alternator. 9 1 2 3 4 5 6 7 8 5.3B Removing alternator brush holder Fig. 9.1 Exploded view of typical alternator (Sec 5) Pulley 9 Body 16 Screws and 24 Fan 10 Brush washers 25 Bolts 11 Spring 17 Plug socket 26 Washers 12 Brush holder 18 Suppressor 27 Drive-end bracket 13 Condenser 19 Shaft nut 28 Stator windings 14 Screws and 20 Spring washer 29 Plate screw washers 21 Thrust ring 30 Diode plate 15 Screws and 22 Bearing 31 (rectifier pack) washers 23 Retainer plate Thrust ring Spring washer Screw and washer Key Rotor Bearing Backing washer Shield (where applicable) 9•4 Electrical system whilst listening to the starter. Listen to find out if the solenoid clicks into position. If it does not, pull off the solenoid wire, and check it with a test bulb. If the wire is live when the key is turned, but the solenoid does not move, take off the starter and remove it to the bench for overhaul. 8 Starter motor removal and refitting 8.2 Starter motor connections ease the holder out of the alternator. Inspect the brushes and if worn below the specified minimum length, they must be renewed. 7 Disconnect the brush leads by unsoldering or carefully cutting them. 8 When soldering the new brush leads, do not allow solder to run down them or their flexibility will be ruined. Gripping the brush leads with a pair of pliers to act as a heat sink will prevent heat transfer to the internal components of the alternator. 9 When inspecting or renewing brushes, check the surface of the slip rings. Clean them with solvent or if they are very discoloured, use very fine glasspaper. 6 Voltage regulator 1 This is of integral type and is part of the brushholder assembly. 2 No provision is made for adjustment or overhaul. 8.3 Removing starter motor 7 Starter motor description and testing 2 1 The starter motor may be one of two different makes. Both are of pre-engaged type. 2 This type of starter motor incorporates a solenoid mounted on top of the starter motor body. When the ignition switch is operated, the solenoid moves the starter drive pinion, through the medium of the shift lever, into engagement with the flywheel starter ring gear. As the solenoid reaches the end of its stroke, and with the pinion by now partially engaged with the flywheel ring gear, the main fixed and moving contacts close and engage the starter motor to rotate the engine. 3 This pre-engagement of the starter drive does much to reduce the wear on the flywheel ring gear associated with inertia type starter motors. 4 If the starter fails, some fault-finding can be done with it still on the car. Check the ignition warning light comes on, and does not go out when the starter is switched on. If it goes out, the fault is probably in the battery. If it stays bright, get an assistant to work the switch, 1 1 Disconnect the battery negative lead. 2 Disconnect the lead from the starter motor (photo). 3 Unscrew the fixing bolts and withdraw the starter motor, downwards on 1116 cc and 1301 cc models (photo). 4 Refitting is a reversal of the removal procedure. 9 Starter motor - overhaul 3 1 As with the alternator, the operations should normally be limited to renewal of the brushes. If the unit has covered a high mileage it will usually be more economical to purchase a new or factory-reconditioned one rather than renew several components of the original unit. 2 Owing to the possibility that a fault can develop in the starter motor solenoid or drive assembly, full dismantling procedures are given later in this Section. Brush - renewal 3 Slide off the cover band. 4 Using a hooked piece of wire, pull up the springs so that the brushes can be withdrawn and their lengths checked for wear. If they have worn below the specified minimum length, renew them by extracting the brush lead connecting screws (photo). Solenoid 5 Disconnect the field connecting wire from the solenoid. 6 Unscrew the bolts which hold the solenoid to the end-frame. 7 Unscrew the yoke tie-rod nuts. Fig. 9.2 Exploded view of typical starter motor (Sec 9) 1 Armature 3 Drive end bracket 5 Solenoid 7 Brush 2 Drive pinion/clutch 4 Shift lever 6 Brush endplate 8 Field windings 9.4 Starter motor brush partly withdrawn Electrical system 9•5 9.8 Starter motor dismantled 10.1 Fuse block (later models) 11.4 Unscrewing steering column switch clamp nut 1 Horn relay 2 Heated tailgate window relay 8 Withdraw the solenoid and yoke off the armature and from the drive end bracket. Note the steel and fibre washers and the shims on the armature shaft (photo). 9 Extract the split pin and tap out the engagement lever pivot pin. 10 Pull the rubber packing piece from the drive end bracket. 11 Withdraw the armature with solenoid plunger, coil spring and engagement lever. 12 Clean the commutator with a fuel soaked rag or very fine glass paper. Do not undercut the mica insulators on the commutator. Drive 13 To remove the drive assembly from the armature shaft, use a piece of tubing to tap the stop collar down the shaft to expose the snap ring. Remove the snap ring and stop collar and slide the drive assembly from the shaft. 14 Refitting is a reversal of removal, but use a new snap ring to secure the drive to the armature shaft. 10 Fuses and relays 1 1 The fuse box is located under the left-hand side of the facia panel and is held in place by two hand screws (photo). 12.1 Courtesy lamp switch 1 Direction indicator flasher unit (relay) 2 The fuses and the circuits protected are identified by symbols. Refer also to Specifications. 3 If a fuse blows, always renew it with one of identical rating. If the new fuse blows immediately, find the cause before renewing the fuse for the second time. This is usually due to defective wiring insulation causing a short circuit. 4 Never substitute a piece of wire or other makeshift device for a proper fuse. 5 Various relays are plugged into the fuse block and include those for the heated rear screen, heater and horns. 6 On cars fitted with power-operated front windows and centralised door locking, the fuses and relays for these circuits are mounted separately under the right-hand side of the facia panel. 7 The relay (flasher unit) for the direction indicators and hazard warning lamps is located on the lower part of the steering column combination switch and is accessible after removing the column shroud. 11 Steering column combination switch 1 Disconnect the battery negative lead. 2 Remove the steering column shrouds. 13.4 Switch panel screw 1 3 The switch can be removed without having to take off the steering wheel, but for clarity, the photographs show the wheel removed. 4 Unscrew the switch clamp nuts, disconnect the wiring plug and remove the switch from the steering column (photo). 5 Refitting is a reversal of removal, but make sure that the activating projections on the steering wheel hub engage correctly with the switches. 12 Courtesy lamp switch 1 1 These are located in and secured to the body pillars with a single screw (photo). 2 Disconnect the battery negative lead. 3 Extract the switch screw and withdraw the switch. 4 If the leads are to be disconnected, tape them to the pillar to prevent them from slipping inside. 5 Refitting is a reversal of removal. Apply petroleum jelly to the switch contacts to prevent corrosion. 9 13 Rocker and push-button switches 1 1 These are mounted in panels on each side of the instrument panel. 2 Disconnect the battery negative lead. 3 Prise off the instrument panel hood cover. This is held in place by clips. The careful use of a screwdriver will assist in releasing them (see Section 21). 4 Extract the switch panel fixing screws. These compress spring clips which in turn secure the switch panel (photo). 5 Withdraw the switch panel until the wiring plugs can be disconnected. Record the location of the plugs before disconnecting 9•6 Electrical system 13.5A Withdrawing switch panel 13.5B Switch panel fibre optic 14.2A Tailgate contact block them. Carefully release the fibre optic filaments (photos). 6 A push-button switch can be removed by compressing its retaining tabs and pushing it from the panel. 7 A rocker switch can be removed if its knob is pulled off and the switch sections withdrawn from the panel. 8 Reassembly and refitting of both types of switches are reversals of removal and dismantling. 14 Tailgate contacts 14.2B Body contact block 1 1 Contact blocks are used to transmit power to the heated tailgate window and to the wiper motor. 2 The block on the tailgate or the body may be released by prising their ends with a screwdriver (photos). 15 Horns 16.1 Headlamp plug and rubber cover 16.2A Headlamp bulbholder spring clips 1 1 These are mounted close to the engine/transmission left-hand mounting below the radiator. 2 Apart from keeping the connecting leads secure, no maintenance or adjustment is required. 16.2B Headlamp halogen type bulb 16 Headlamp bulb - renewal 1 1 Open the bonnet and pull off the plug and the rubber cover from the rear of the headlamp (photo). 2 Prise back the spring bulbholder clips and withdraw the combined bulb and holder (photos). 3 Refit the new bulb. Avoid fingering it if it is of halogen type. Should the fingers touch the bulb, wipe it with a rag soaked in methylated spirit to remove any residual grease. 4 Turn the bulbholder until the pip on its flange engages in the cut-out in the rim of the reflector. 5 Snap back the spring retaining clips, refit the rubber cover and reconnect the plug. 17 Headlamp beam - alignment 2 1 It is recommended that the headlamp beams are aligned by your dealer or a service station having optical setting equipment. 2 Where an owner wishes to do the job himself, proceed in the following way. 3 Have the car standing on a level floor with Fig. 9.3 Headlamp beam adjustment screws (Sec 17) A Vertical B Horizontal Electrical system 9•7 18.1 Headlamp upper fixing screw 18.2 Withdrawing headlamp the tyres correctly inflated and square to a wall, at a distance of 10.0 m (32.8 ft) from it. 4 Mark the wall to correspond with the centres of the headlamps. 5 Switch to dipped beams when the brightest parts of the light pattern should be below the marks on the wall by an amount equal to one tenth of the distance between the floor and the mark on the wall. 6 Adjust the beams as necessary by turning the adjuster screws (A) vertical or (B) horizontal, which are located at the rear of the headlamp. 2 Open the bonnet, push and twist the bulbholder from its location (photo). 3 The wedge base type bulb is simply pulled from its holder. 18 Headlamp removal and refitting 1 19.2 Front parking lamp bulb 7 Remove the bulb from the holder. Rear lamp cluster 4 Extract the screws and remove the lens (photo). 5 Depress and twist the bayonet fitting type bulb from its holder. 8 Open the tailgate. 9 Gently prise up the clips on the top surface of the lens. Pull the upper part of the lens outwards and release it from the lower fixings (photo). 10 The individual lamp bulbs may be renewed, all of them being of bayonet fitting type (photo). Side repeater lamp Rear number plate lamp 6 This bulb may be renewed in one of two ways. Either partially remove the underwing protective shield and reach up under the front wing and pull the holder out of the lamp body or depress the lamp retaining tab and withdraw the lamp from outside the wing. The tab is very brittle (photo). 11 Insert a screwdriver blade in the lens slot and prise it from the bulb holder. Withdraw the bulb. 12 If preferred, the complete lamp may be removed from the bumper by reaching up under the bumper and squeezing the lamp retaining tabs (photo). 19.4 Front direction indicator lamp lens and bulb 19.6 Side repeater lamp Front direction indicator lamp 1 Open the bonnet and extract the two headlamp mounting screws from the top rail (photo). 2 Pull the headlamp unit forward off its ballstud and then disconnect the wiring plug (photo). 3 Refitting is a reversal of removal. 19 Exterior lamps bulb renewal 1 Front parking lamp 1 The bulbholder is located in the headlamp reflector. 19.9 Rear lamp lens upper clip 19.10 Rear lamp bulbs A Direction indicator C Stop E Fog B Reversing D Tail 19.12 Rear number plate lamp withdrawn 9 9•8 Electrical system 20.1 Interior roof lamp withdrawn 20 Interior lamps bulb renewal 1 Courtesy lamp 1 The lamp lenses, whether roof or pillar mounted, are removed by prising off using a screwdriver inserted under one end (photo). 2 The festoon type bulb is pulled from its spring contacts. Instrument panel lamps 3 Remove the instrument panel hood cover as described in the next Section. The panel lighting bulbs may be renewed without further dismantling, but access to the warning and indicator bulbs can only be obtained if the instrument panel is partially withdrawn as described in the next Section (photo). 20.3 Instrument panel warning lamp Fig. 9.4 Instrument hood cover (1) (Sec 21) 4 Pull out the appropriate bulbholder and withdraw the wedge base type bulb. 5 Fit the new bulb, the holder, instrument panel and hood cover. 5 Remove the instrument panel upwards (photo). 6 Refitting is a reversal of removal. 21 Instrument panel removal and refitting 1 1 Disconnect the battery negative lead. 2 Remove the instrument panel hood cover. The easiest way to do this is to insert the fingers at the sides, and pull the hood sharply upwards off its retaining clips. 3 Extract the two fixing screws from the instrument panel and pull it towards you until the speedometer drive cable can be disconnected by squeezing its plastic retaining ring (photo). 4 Disconnect the wiring plugs and record their exact locations. 22 Instrument panel dismantling 1 With the instrument panel removed from the car, individual instruments may be removed in the following way. 2 Pull off the speedometer trip device knob. 3 Remove the instrument hood cover by gently releasing the plastic clips (Fig. 9.4). 4 The speedometer is secured by two screws for its metal casing and one screw for its plastic casing. Other instruments are held to the panel by nuts (photo). 5 On models equipped with a check control system (see Section 34), the speedometer cannot be removed until the control unit has first been withdrawn. 6 On ES versions, the speedometer cannot be removed until the economy gauge control unit has been removed. 23 Speedometer drive cable renewal 21.2 Removing instrument panel hood cover 21.3 Removing instrument panel screw 21.5 Instrument panel and steering wheel removed 22.4 Rear view of instrument panel 1 1 1 Remove the instrument panel hood cover as described in Section 21. 2 Disconnect the speedometer cable from the speedometer by squeezing the plastic retaining ring (photo). 23.2 Speedometer cable connector at head Electrical system 9•9 Fig. 9.5 Windscreen wiper blade fixing (Sec 24) 23.3 Speedometer cable connector at transmission 24.4 Windscreen wiper arm nut 3 Working at the transmission, disconnect the speedometer cable by unscrewing the knurled retaining ring (photo). 4 Withdraw the cable through the bulkhead grommet. 5 Refit the new cable assembly by reversing the removal operations. wiper arm. The blade can then be withdrawn, passing the wiper arm hook through the slot (C) in the blade stretcher (Fig. 9.5). 3 Before removing the wiper arm, it is worthwhile sticking a strip of masking tape on the screen to indicate the setting of the arm and blade as a guide to refitting. 4 Flip up the plastic cover and unscrew the arm retaining nut. Pull off the arm from the splined drive spindle (photo). 5 Refitting is a reversal of removal. 24 Windscreen wiper blade and arm - removal and refitting 1 1 The wiper blade can be removed once the arm has been pulled away from the glass and locked in position. 2 Depress the small tab (A) and push the U-shaped carrier out of the hook (B) of the 25 Windscreen wiper motor removal and refitting A Tab 2 25.4 Removing windscreen wiper motor mounting screws 1 Open the bonnet and disconnect the battery negative lead. 2 Remove the wiper arm and blade as previously described. 3 Prise off the sealing cover from around the drive spindle and then unscrew the drive spindle bezel nut. 4 Pull back the weathersealing strip from above the wiper motor location and remove the two screws which are exposed (photo). 5 Withdraw the motor/gearbox with protective cover from under the lip of the upper bulkhead. Disconnect the wiring plug (photos). 6 Refitting is a reversal of removal. 25.5A Windscreen wiper motor cover 25.5B Removing windscreen wiper motor B Wiper arm C Blade slot Fig. 9.6 Windscreen wiper motor components (Sec 25) 1 Gears 2 Crank arm 3 Shaft gear 4 Intermittent control unit 5 Motor yoke 26 Tailgate wiper blade and arm - removal and refitting 1 1 Pull the wiper arm from the glass until it locks. 2 With the thumb nail pull down the tab to release the peg (B) from the hole (A) (Fig. 9.7). Pull the blade from the arm. 3 To remove the arm, flip up the plastic cover and remove the nut exposed. Pull the arm from the drive spindle. 4 Refitting is a reversal of removal. Fig. 9.7 Tailgate wiper blade fixing (Sec 26) A Hole B Peg 9 9•10 Electrical system 27.4 Tailgate wiper motor 27 Tailgate wiper motor removal and refitting 28.1 Washer fluid reservoir 1 1 Remove the blade and arm as previously described. Unscrew the drive spindle bezel nut. 2 Open the tailgate fully. 3 Unclip and remove the wiper motor cover. 4 Unscrew the mounting screws, withdraw the motor and disconnect the wiring plug (photo). 5 Refitting is a reversal of removal. 28 Washer system 1 1 The washer system for the windscreen and the tailgate operates from a bag type fluid reservoir within the engine compartment (photo). 2 The reservoir bag is fitted with two pumps, one for each system (photo). 3 Use screen cleaning fluid mixed in the recommended proportion in the washer fluid reservoir and in very cold weather add a small quantity of methylated spirit. 4 To clear a blocked washer jet nozzle or to adjust the wash jet glass-striking pattern, insert a pin part way into the jet nozzle. 29 Heated tailgate window precautions and repair 28.2 Washer pumps 2 1 The heater element inside the tailgate glass should be treated with care. 2 Clean only with a damp cloth and wipe in the direction in which the filaments run. Avoid scratching with rings on the fingers, or by allowing luggage to rub on the glass. Never stick adhesive labels over the heater element. 3 Should one of the heater filaments be broken it can be repaired using one of the special silver paints available, but follow the manufacturer’s instructions carefully. 30 Radio/cassette - fitting 2 1 In-car entertainment equipment is not provided as standard on the models covered by this Manual. 2 However, the centre console is designed to receive a radio set after removing the blanking plate behind which a power lead is already provided. 3 The ignition system and other electrical components are suppressed during production of the car and further suppression should not be required other than earthing the wiper motor. Receiver 4 Fit the radio/cassette using the installation kit supplied with the equipment. 5 On Comfort models, fit an in-line fuse in the power feed. On Super models the radio supply is protected by fuse number 12. 6 Make sure that the radio is well earthed to a metal body component. Aerial Fig. 9.8 Radio housing and power lead (A) (Sec 30) 7 The recommended locations for the aerial are towards the rear of the right-hand front wing or on the windscreen pillar. 8 Fitting instructions for Fiat aerials are supplied with them, but the following general advice will help if using non-Fiat equipment. 9 Motorised automatic aerials rise when the equipment is switched on and retract at switch-off. They require more fitting space and supply leads, and can be a source of trouble. 10 There is no merit in choosing a very long aerial as, for example, the type about three metres in length which hooks or clips on to the rear of the car, since part of this aerial will inevitably be located in an interference field. For VHF/FM radios the best length of aerial is about one metre. Active aerials have a transistor amplifier mounted at the base and this serves to boost the received signal. The aerial rod is sometimes rather shorter than normal passive types. 11 A large loss of signal can occur in the aerial feeder cable, especially over the Very High Frequency (VHF) bands. The design of feeder cable is invariably in the co-axial form, ie a centre conductor surrounded by a flexible copper braid forming the outer (earth) conductor. Between the inner and outer conductors is an insulator material which can be in solid or stranded form. Apart from insulation, its purpose is to maintain the correct spacing and concentricity. Loss of signal occurs in this insulator, the loss usually being greater in a poor quality cable. The quality of cable used is reflected in the price of the aerial with the attached feeder cable. 12 The capacitance of the feeder should be within the range 65 to 75 picofarads (pF) approximately (95 to 100 pF for Japanese and American equipment), otherwise the adjustment of the car radio aerial trimmer may not be possible. An extension cable is necessary for a long run between aerial and receiver. If this adds capacitance in excess of the above limits, a connector containing a series capacitor will be required, or an extension which is labelled as “capacity-compensated”. 13 Fitting the aerial will normally involve making a 7/8 in (22 mm) diameter hole in the bodywork, but read the instructions that come with the aerial kit. Once the hole position has been selected, use a centre punch to guide the drill. Use sticky masking tape around the area for this helps with marking out and drill location, and gives protection to the Electrical system 9•11 Fig. 9.9 Door speaker mounting (Sec 30) paintwork should the drill slip. Three methods of making the hole are in use: a) Use a hole saw in the electric drill. This is, in effect, a circular hacksaw blade wrapped round a former with a centre pilot drill. b) Use a tank cutter which also has cutting teeth, but is made to shear the metal by tightening with an Allen key. c) The hard way of drilling out the circle is using a small drill, say 1/8 in (3 mm), so that the holes overlap. The centre metal drops out and the hole is finished with round and half-round files. 14 Whichever method is used, the burr is removed from the body metal and paint removed from the underside. The aerial is fitted tightly ensuring that the earth fixing, usually a serrated washer, ring or clamp, is making a solid connection. This earth connection is important in reducing interference. Cover any bare metal with primer paint and topcoat, and follow by underseal if desired. 15 Aerial feeder cable routing should avoid the engine compartment and areas where stress might occur, eg under the carpet where feet will be located. Fig. 9.10 Rear speaker mounting (Sec 30) Loudspeakers 16 A mono speaker may be located under the facia panel beneath the glovebox. 17 Provision is made for twin speakers within the door tidy bins or under the rear shelf mountings. 18 Speakers should be matched to the output stage of the equipment, particularly as regards the recommended impedance. Power transistors used for driving speakers are sensitive to the loading placed on them. 31 Electrically-operated front door windows 3 1 The electrically-operated front door windows are controlled by switches on the centre console or in the door armrest (depending on model). The regulator motor and cable are located within the door cavity. 2 To gain access to the assembly, remove the door trim panel as described in Chapter 12. 3 Disconnect the wiring plug (1) (Fig. 9.11). 4 Release the bolts which connect the power lift to the glass mounting. 5 Remove the bolts which hold the lift assembly to the door. 6 The motor and glass mounting may be disconnected from the cable guide and sleeve and any faulty components renewed. 7 When refitting the assembly to the door, make sure that the window glass slides smoothly before fully tightening the cable guide bolts. Refer to Section 10 for details of system fuses and relays. 32 Central door locking system 1 1 The doors are locked simultaneously from the outside by turning the key in either direction. 2 The doors can be locked from inside the car in the following ways: All doors locked or unlocked - depress or lift a front door lock plunger knob. One rear door locked or unlocked - depress or lift a rear door lock plunger knob. 9 Fig. 9.11 Power-operated window motor (Sec 31) 1 Connector plug Fig. 9.12 Power operated window components (Sec 31) 1 Electric motor 4 Cable 2 Glass mounting 5 Cable sleeve 3 Cable guide Fig. 9.13 Central door locking system components (Sec 32) 1 Solenoid 4 Exterior handle 2 Lock relay lever lever 3 Link rod 9•12 Electrical system 3 The centralised door locking system can operate independently of the key. 4 To gain access to the lock solenoid and linkage, remove the front door trim panel as described in Chapter 12. 5 Disconnect the battery negative lead. 6 Disconnect the electrical wiring plugs from the solenoid within the door cavity. 7 Disconnect the solenoid from the lock lever by removing the clip. 8 Unscrew the two bolts which secure the solenoid to the door and remove it. 9 Renew the solenoid or switch as necessary. 10 Refitting is a reversal of removal. 11 Refer to Section 10 for details of system fuses and relays. 33 Economy gauge (Econometer) 2 1 This device is fitted to ES (energy saving) models and indicates to the driver the fuel consumption (in litres per 100 km) coupled with a needle which moves over coloured sections of a dial to make the driver aware that his method of driving is either conducive to high or low fuel consumption. Refer to Chapter 3, Section 16. 2 The device is essentially a vacuum gauge which also incorporates a warning lamp to indicate to the driver when a change of gear is required. 3 A fuel cut-out valve (see Chapter 3, Section 11) is used in conjunction with the economy gauge so that when the accelerator pedal is released during a pre-determined engine speed range, fuel supply to the engine is stopped, but resumes when the engine speed falls below the specified range. LED (light emitter diode) 4 The gearchange indicator will only light up at engine speeds in excess of 2000 rev/min for vacuum pressures up to 600 mm Hg in 1st, 2nd and 3rd speed gears and for vacuum pressures up to 676 mm Hg in 4th speed gear. The light will not come on if 5th speed gear is engaged or if the coolant temperature is below 55ºC. 5 There is a two second delay in the light coming on to prevent it operating during rapid acceleration in a low gear. 6 If the LED light comes on during deceleration it should be ignored. 34 Check control (warning module) system Fault finding 7 A faulty economy gauge should be checked in the following way. 8 Refer to Section 21 and remove the instrument panel. 9 Disconnect the economy gauge L connector and then connect a test lamp between the BN cable contact and earth. If the lamp comes on then the gauge supply circuit is not open. If the lamp does not come on, check all connections in the supply cable which comes from the interconnecting unit of the electrical system, also Fuse No 12. 10 Now connect a voltmeter between the white cable and earth. Check the voltage with the engine not running, but the ignition switched on. It should be between 0.7 and 0.9 volt. If the reading varies considerably from that specified, check the connections between the economy gauge and the fuel cut-out device control unit. If the fault cannot be rectified, renew the ignition control unit (Digiplex system, see Chapter 4). 11 Now check the closed throttle valve plate switch by connecting a voltmeter between the brown and BN cables of the L connector. With the valve plate open, there should be no reading, but with it open, voltage should be indicated. 12 Failure to conform as described will be due to a faulty earth in the switch or a faulty fuel cut-out device control unit. 13 A further test of the throttle valve plate switch may be carried out by disconnecting the multi-plug from the fuel cut-out device control unit. 14 Connect a test lamp to contact 4 (positive battery terminal). The lamp should come on, when the engine is idling or the accelerator released. If it does not, renew the throttle valve plate switch. A Parking lamps B Coolant level 2 1 This is fitted into the instrument panel of certain models to provide a means of checking the operation of many electrical circuits and other systems in the interest of safety. Sensors are used where appropriate. 2 The following components are not monitored by the system, but have separate warning lamps: Handbrake “on” Choke in use Low engine oil pressure Battery charge indicator 3 The multi-functional electronic device automatically checks the following functions whether the engine is running or not: Coolant level Disc pad wear Door closure Engine oil level Front parking lamps Rear foglamps Stop lamps 4 The check information is stored by the system monitor until the engine is started when the display panel then indicates the situation by means of the LEDs (light emitter diodes) and the general lamp. 5 If all functions are in order, the green panel lamp will come on when the ignition key is turned and will go out after two to three seconds. 6 If some functions are not in order, then the red panel lamp will come on also the appropriate LED. Sensors - checking 7 If a fault signal occurs which is subsequently found to be incorrect, first check the wiring connections between the Fig. 9.15 Check system control panel (Sec 34) Fig. 9.14 Location of control units (Sec 33) A Digiplex ignition system control unit B Fuel cut-out valve control unit 15 Connect a tachometer to the brown/white cable contact in the L connector and record the engine speed with the engine running. If no reading is obtained, renew the Digiplex ignition control unit which must be faulty. C Engine oil level D Door closure E Brake fluid level F Disc pad wear Electrical system 9•13 Fig. 9.16 Digital clock controls (Sec 35) A Control button - hour setting B Control button - display (ignition off) C Control button - minute setting D Map reading lamp switch sensors, lamp circuits and the control unit. Corrosion at the terminals may also be a contributory cause. 8 Never short circuit a sensor supply wire or the electronic module will be damaged. the red and green general warning lamps. Unscrew the two monitor fixing bolts. 36 Cigar lighter 35 Clocks - setting Check control unit and monitor removal and refitting 9 Remove the instrument panel as described in Section 21. 10 Unbolt the control unit housing from the instrument panel. 11 Access to the monitor can only be obtained after removing the tachometer and display minutes and seconds and again to display hours and minutes. 3 To correct the hour setting, press button C then button A and release it at the correct time. Depress button C three times to display hours and minutes. 4 To correct the minute setting, depress button C twice. Depress button A and release it when the correct time is shown. Depress button C twice to display hours and minutes. 5 To correct the second setting, depress button C three times. Depress button A and hold it depressed to zero the seconds then release the button. Depress button C to display the hours and minutes. 6 Switch D, Fig. 9.16 operates the map reading lamp fitted to SX models in conjunction with the digital clock. 1 Quartz type 1 To set the hands, depress the knob and turn it. Digital type 2 To set the clock, depress button A to 1 1 This device can be operated without switching on the ignition. 2 Push in the knob and when it springs out it is ready for use. 3 The cigar lighter socket may be used as a power source provided the rating of the accessory does not exceed 100 watts. Fault finding overleaf 9 9•14 Electrical system Fault finding - electrical system No voltage at starter motor Horn fails to operate m m m m m m Blown fuse m Cable or cable connection loose, broken or disconnected m Horn has an internal fault Battery discharged Battery defective internally Battery terminals loose or earth lead not securely attached to body Loose or broken connections in starter motor circuit Starter motor switch or solenoid faulty Voltage at starter motor - faulty motor m m m m Starter brushes badly worn, sticking, or brush wires loose Commutator dirty, worn or burnt Starter motor armature faulty Field coils earthed Starter motor noisy or rough in engagement m Pinion or flywheel gear teeth broken or worn m Starter drive main spring broken m Starter motor retaining bolts loose Horn emits intermittent or unsatisfactory noise m Cable connections loose m Horn incorrectly adjusted Lights do not come on m m m m If engine not running, battery discharged Light bulb filament burnt out or bulbs broken Wire connections loose, disconnected or broken Light switch shorting or otherwise faulty Lights come on but fade out m If engine not running, battery discharged Alternator not charging* Lights give very poor illumination m Drivebelt loose and slipping, or broken m Brushes worn, sticking, broken or dirty m Brush springs weak or broken * If all appears to be well but the alternator is still not charging, take the car to an automobile electrician for checking of the alternator m m m m m m Ignition light fails to go out, battery runs flat in a few days m Drivebelt loose and slipping, or broken m Alternator faulty Battery will not hold charge for more than a few days m m m m m m m m Battery defective internally Electrolyte level too low or electrolyte too weak due to leakage Plate separators no longer fully effective Battery plates severely sulphated Drivebelt slipping Battery terminal connections loose or corroded Alternator not charging properly Short in lighting circuit causing continual battery drain Fuel gauge gives no reading m m m m m Fuel tank empty! Electric cable between tank sender unit and gauge earthed or loose Fuel gauge case not earthed Fuel gauge supply cable interrupted Fuel gauge unit broken Lamp glasses dirty Reflector tarnished or dirty Lamps badly out of adjustment Incorrect bulb with too low wattage fitted Existing bulbs old and badly discoloured Electrical wiring too thin not allowing full current to pass Lights work erratically, flashing on and off, especially over bumps m Battery terminals or earth connections loose m Lights not earthing properly m Contacts in light switch faulty Wiper motor fails to work m m m m m Blown fuse Wire connections loose, disconnected or broken Brushes badly worn Armature worn or faulty Field coils faulty Wiper motor works very slowly and takes excessive current m m m m Commutator dirty, greasy or burnt Drive spindle binding or damaged Armature bearings dry or unaligned Armature badly worn or faulty Wiper motor works slowly and takes little current m Electric cable between tank unit and gauge broken or disconnected m Brushes badly worn m Commutator dirty, greasy or burnt m Armature badly worn or faulty Horn operates all the time Wiper motor works but wiper blade remains static m Horn push either earthed or stuck down m Horn cable to horn push earthed m Drive spindle damaged or worn m Wiper motor gearbox parts badly worn Fuel gauge registers full all the time 10•1 Chapter 10 Steering Contents Description and maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Fault finding - steering . . . . . . . . . . . . . . . . . . . . . See end of Chapter Steering angles and front wheel alignment . . . . . . . . . . . . . . . . . . . . 8 Steering column - removal, overhaul and refitting . . . . . . . . . . . . . . 5 Steering column lock - removal and refitting . . . . . . . . . . . . . . . . . . 9 Steering gear - overhaul . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Steering rack - removal and refitting . . . . . . . . . . . . . . . . . . . . . . . . . Steering rack gaiter - renewal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Steering wheel - removal and refitting . . . . . . . . . . . . . . . . . . . . . . . Tie-rod end balljoint - renewal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 6 3 4 2 Degrees of difficulty Easy, suitable for novice with little experience 1 Fairly easy, suitable for beginner with some experience 2 Fairly difficult, suitable for competent DIY mechanic 3 Difficult, suitable for experienced DIY mechanic 4 Very difficult, suitable for expert DIY or professional 5 Specifications Type ................................................... Steering wheel diameter .............................. Number of turns, lock-to-lock Turning circle ........................ ......................................... Rack and pinion with safety column 381.0 mm (15.0 in) 4 9.4 m (3084 ft) Steering angles of roadwheels Inner wheel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Outer wheel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32º 58’ 39º 8’ Front suspension steering angles Camber . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Castor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Toe-in . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0º 5’ negative to 0º 55’ positive 1º 40’ to 2º 20’ positive 0 to 2.0 mm (0 to 0 08 in) Rear suspension Camber . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0º (non-adjustable) Rack lubricant Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Lithium based molybdenum disulphide grease 140 cc Torque wrench settings Nm 50 27 24 35 35 5 Steering wheel nut . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Steering shaft coupling pinch-bolt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Steering gear mounting bolts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Tie rod balljoint locknut . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Tie-rod balljoint taper pin nut . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Steering column upper mounting bolts . . . . . . . . . . . . . . . . . . . . . . . . . 1 Description and maintenance 1 1 The steering gear is of rack and pinion type with a universally-jointed column which incorporates a steering lock and ignition switch. 2 The steering wheel is of two spoke type on all models except the SX which has four spokes. 3 The system is maintenance-free except to check occasionally the pinch-bolts. 4 At the intervals specified in “Routine Maintenance” carefully inspect the rack gaiters for splits, particularly at the bottom of the vees, as a split here can often go unnoticed. 5 Check the tie-rod balljoints for wear. To do lbf ft 37 20 18 26 26 3 this, have an assistant turn the steering wheel repeatedly in both directions through an arc of about 10 or 15 degrees. Observe the balljoints for lost motion or slackness. If evident, renew the balljoint as described in Section 2 Fig. 10.1 Sectional view of steering gear (Sec 1) 10 10•2 Steering section of the rack will take the grease into the housing as it returns. 9 Reconnect the tie-rod end to the tie-rod and the eye of the steering arm. Provided the locknut is tightened by only rotating it through the same distance by which it was loosened, the front wheel alignment (tracking) should not have been unduly disturbed. Even so, check the alignment as described in Section 8. 4 Steering wheel removal and refitting 2.2 Disconnecting a tie-rod end balljoint 2 Tie-rod end balljoint renewal 4 1 Jack up the front of the car and remove the roadwheel from the side on which the balljoint is to be renewed. 2 Unscrew the tie-rod balljoint taper pin nut and, using a suitable extractor, separate the tie-rod balljoint from the eye of the steering arm (photo). 3 Release the locknut on the tie-rod, unscrewing it only just enough to be able to unscrew the tie-rod end from the tie-rod. 4 With the tie-rod end removed, wire brush the threads on the tie-rod without disturbing the position of the locknut; apply grease to the threads and screw on the new tie-rod end until the locknut can be tightened by turning it through the same amount of rotation it was given when unscrewed. 5 Reconnect the balljoint taper pin to the eye of the steering arm and tighten the retaining nut to the specified torque. Never grease the taper pin or eye; the pin will otherwise turn when the nut is tightened. If a taper pin is inclined to rotate when a nut is being tightened, apply pressure to the socket of the joint to force the taper pin into closer contact with the tapered hole in the eye. If a taper pin is pointing downward, a strong lever can be used to apply the extra pressure. Where the taper pin of a balljoint points upward, a jack placed under the joint socket will produce the desired result. 6 Although the careful fitting of the new tie-rod end will have approximately 1 4.2 Removing steering wheel hub plate maintained the original front wheel alignment of the car, manufacturing differences alone of the new component make it essential to check the setting, as described in Section 8 and to adjust if necessary. 3 Steering rack gaiter renewal 4 1 If lubricant is found to be leaking from the gaiters (at the ends of the housing), first check that the gaiter clips are secure. 2 If the lubricant is leaking from the gaiter through a split, the gaiter can be removed in the following way, without the necessity of withdrawing the gear from the car. 3 Remove the tie-rod end from the side concerned, as described in the preceding Section. 4 Release the gaiter clips; draw the gaiter from the rack housing and off the tie-rod. 5 If the gaiter has only just split, road dirt is unlikely to have entered and lubricant can be wiped away. If it is severely grit contaminated, the steering gear should be completely removed, the original lubricant flushed out and new lubricant pumped in. 6 If the gear does not have to be removed from the car, slide the new gaiter into position and secure it with the inboard clip. 7 The rack lubricant is molybdenum disulphide type grease. 8 When recharging the gaiter with this type of lubricant, give full steering lock to the side being replenished so that the extended 1 Disconnect the battery negative lead. 2 Set the steering wheel and the front roadwheels in the straight-ahead attitude. Prise out the hub plate (photo). 3 Unscrew and remove the steering wheel securing nut, then pull the wheel from the column shaft. If it is tight on its splines, tap it upward at the wheel rim, using the palms of the hands. 4 Refitting is a reversal of the removal process; make sure that the spokes of the wheel are in the lower part of the wheel. 5 Tighten the securing nut to the specified torque. 5 Steering column - removal, overhaul and refitting 3 1 Remove the steering wheel as previously described. 2 Extract the screws from the underside of the steering column upper shroud and then lift off the upper and lower shroud sections (photo). Where applicable, detach and remove the trim panel from the underside of the facia on the driver’s side. 3 Disconnect the battery negative lead. 4 Disconnect the wiring plug for the steering column combination switch. 5 Unscrew the clamp nuts and pull the combination switch off the end of the steering shaft. 6 Unscrew the column upper mounting bracket bolts and lower the shaft/column tube to rest on the seat (photo). 7 Remove the pinch-bolt from the lower universal joint coupling and remove the shaft/column tube from the car. Overhaul 5.2 Removing steering column shrouds 5.6 Steering column upper mounting 8 Remove the pinch-bolt from the upper universal joint and disconnect the lower shaft. 9 Grip the tube mounting flange in the jaws of a vice and relieve the staking at the base of the tube. 10 Using a plastic or copper-faced hammer, tap the shaft down out of the tube. 11 The lower bush will be ejected while the upper one should be prised out of the tube. 12 Reassemble the upper shaft into the tube by tapping new bushes into position. Steering 10•3 Fig. 10.2 Removing steering column shroud screws (Sec 5) Fig. 10.3 Unscrewing combination switch clamp nuts (Sec 5) Fig. 10.4 Renewing steering shaft bushes (Sec 5) 13 Stake the lower end of the tube to retain the bush. 14 Reassembly is a reversal of removal, noting that the universal joint coupling pinch-bolts should pass smoothly through the grooves in the steering shaft. 15 Fit the steering wheel when the roadwheels are in the straight-ahead position. 16 Tighten all nuts and bolts to the specified torque. Reconnect the battery. steering shaft lower coupling by unscrewing and removing the pinch-bolt (photo). 3 Disconnect the tie-rod end balljoints from the steering arms as described earlier in this Chapter. 4 Unscrew and remove the rack clamp mounting bolts and withdraw the steering gear from the car crossmember (photo). 5 Refitting is a reversal of removal, but on completion check the front wheel alignment as described in Section 8. induced through the steering will give a feeling of play, and sometimes faint clonking can be heard. In extreme cases, free play in the steering may be felt, though this is rare. If the steering is compared with that of a new rack on another car, the lack of friction damping is quite apparent in the ease of movement of the steering wheel of the worn one. 6 Centralise the steering rack. Do this by counting the number of turns lock-to-lock and then turning the steering wheel from one lock through half the number of turns counted. 7 Take the cover plate off the damping slipper, remove the spring and shims, and refit the cover plate. 8 Screw in the cover plate bolts just enough to hold the slipper against the rack. 9 Measure the gap between the cover plate and the rack housing using feeler blades. 10 Select shims from the thicknesses available (0.10, 0.125 and 0.30 mm) to provide a shim pack thicker than the gap by between 0.05 and 0.13 mm. 11 Remove the cover plate, fit the spring and bolt on the cover plate with the selected shims. 6 Steering rack removal and refitting 4 1 Set the steering in the straight-ahead mode. 2 Working inside the car, disconnect the 7 Steering gear - overhaul 4 1 A worn steering gear should not be overhauled, but a new or factory reconditioned unit fitted. 2 After a high mileage, the following adjustment may be needed however. Rack damper - adjustment 6.2 Steering shaft coupling 6.4 Steering rack housing at pinion end 3 The slipper in the rack housing presses the rack into mesh with the pinion. This cuts out any backlash between the gears. Also, due to its pressure, it introduces some stiffness into the rack, which cuts out excessive reaction from the road to the steering wheel. 4 In due course, wear reduces the pressures exerted by the slipper. The pressure is controlled by the cover plate and a spring. 5 The need for resetting of the slipper is not easy to detect. On bumpy roads, the shock Fig. 10.5 Sectional view of rack damper (Sec 7) 8 Steering angles and front wheel alignment 4 1 Accurate front wheel alignment is essential to provide good steering and roadholding characteristics and to ensure slow and even tyre Fig. 10.6 Camber angle (Sec 8) A Vertical line B Camber angle (positive) 10 10•4 Steering Fig. 10.8 Front wheel alignment diagram (Sec 8) Fig. 10.7 Castor angle (Sec 8) A Vertical line B Castor angle (positive) wear. Before considering the steering angles, check that the tyres are correctly inflated, that the front wheels are not buckled, the hub bearings are not worn or incorrectly adjusted and that the steering linkage is in good order, without slackness or wear at the joints. 2 Wheel alignment consists of four factors: Camber, is the angle at which the road wheels are set from the vertical when viewed from the front or rear of the vehicle. Positive camber is the angle (in degrees) that the wheels are tilted outwards at the top from the vertical. Castor, is the angle between the steering axis and a vertical line when viewed from each side of the vehicle. Positive castor is indicated when the steering axis is inclined towards the rear of the vehicle at its upper end. Steering axis inclination, is the angle when viewed from the front or rear of the vehicle between vertical and an imaginary line drawn between the upper and lower suspension strut mountings. Toe, is the amount by which the distance between the front inside edges of the roadwheel rims differs from that between the rear inside edges. 3 If the distance between the front edges is less than that at the rear, the wheels are said to toe-in. If the distance between the front inside edges is greater than that at the rear, the wheels toe-out. 4 Camber and castor are set during production of the car and are not adjustable. Any deviation from specification will be due to X Front dimension Y Rear dimension Y - X = Toe-in collision damage or to gross wear in the components concerned. 5 To check the front wheel alignment, first make sure that the lengths of both tie-rods are equal when the steering is in the straight-ahead position. Measure between the locknut at the balljoint and the ball cup at the end of the rack housing by passing a thin rod under the rack of the gaiter. If adjustment is required, release the locknut and turn the tie-rod. 6 Obtain a tracking gauge. These are available in various forms from accessory stores or one can be fabricated from a length of steel tubing suitably cranked to clear the sump and bellhousing and having a setscrew and locknut at one end. 7 With the gauge, measure the distance between the two wheel inner rims (at hub height) at the rear of the wheel. Push the vehicle forward to rotate the wheel through 180º (half a turn) and measure the distance between the wheel inner rims, again at hub height, at the front of the wheel. This last measurement should differ from (be less than) the first by the appropriate toe-in according to the Specification (see Specifications Section). 8 Where the toe-in is found to be incorrect, release the tie-rod balljoint locknuts and turn the tie-rods equally. Only turn them a quarter of a turn at a time before re-checking the alignment. Viewed from the centre line of the car, turning the tie-rod clockwise will decrease the toe-in. 9 Make sure that the gaiter outboard clip is Fig. 10.9 Steering column lock shear bolts (arrowed) (Sec 9) released otherwise the gaiter will twist as the tie-rod is rotated. 10 Always turn both rods in the same direction when viewed from the centre line of the vehicle otherwise the rods will become unequal in length. This would cause the steering wheel spoke position to alter and cause problems on turns with tyre scrubbing. 11 On completion, tighten the tie-rod balljoint locknuts without altering their setting. Check that the balljoint is at the centre of its arc of travel and then retighten the gaiter clip. 9 Steering column lock removal and refitting 1 1 Remove the steering wheel and column shrouds as described in Section 5, also the steering column combination switch. 2 Unscrew and remove the steering column mounting bolts and lower the column to expose the lock shear bolts. 3 Drill out the bolts or extract them using an extractor. 4 Refer to Chapter 4 for details of separation of the ignition switch from the lock section. 5 When fitting the new lock, tighten the shear bolts until their heads break off. 6 Bolt up the column, fit the combination switch, shrouds and steering wheel and tighten all nuts and bolts to the specified torque. Fault finding - steering Note: Before diagnosing steering faults, be sure that trouble is not due to incorrect or uneven tyre pressures, inappropriate tyre combinations, or braking system or suspension defects. Car pulls to one side m Incorrect steering geometry m Collision damage Vibration at steering wheel m Roadwheels out of balance or loose m Tyre damage m Loose driveshaft-to-hub nuts Car wanders Rattles from steering m Play in steering gear m Wear in steering balljoints Play at steering wheel m Steering damper defective or in need of adjustment m Loose steering column mounting bolts m Loose steering column/shaft coupling pinch-bolts m Loose steering rack housing mounting bolts m Worn steering shaft bushes m Wear in steering rack or balljoints m Loose steering shaft coupling pinch-bolt or worn splines m Worn steering column/shaft universal joints m Incorrect steering geometry m Worn steering components m Collision damage Heavy or stiff steering m Lack of lubricant in steering gear or balljoints m Incorrect steering geometry m Collision damage Excessive or uneven tyre wear 11•1 Chapter 11 Suspension For modifications, and information applicable to later models, see Supplement at end of manual Contents Fault finding - suspension . . . . . . . . . . . . . . . . . . . See end of Chapter Front coil spring - removal and refitting . . . . . . . . . . . . . . . . . . . . . . 4 Front crossmember - removal and refitting . . . . . . . . . . . . . . . . . . . 7 Front hub carrier - removal and refitting . . . . . . . . . . . . . . . . . . . . . . 5 Front suspension strut - removal and refitting . . . . . . . . . . . . . . . . . 3 General description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Rear coil spring - removal and refitting . . . . . . . . . . . . . . . . . . . . . . . Rear shock absorber - removal and refitting . . . . . . . . . . . . . . . . . . . Rear suspension - removal and refitting . . . . . . . . . . . . . . . . . . . . . . Track control arm - removal and refitting . . . . . . . . . . . . . . . . . . . . . Trailing arm rubber bush - renewal . . . . . . . . . . . . . . . . . . . . . . . . . . 2 9 8 11 6 10 Degrees of difficulty Easy, suitable for novice with little experience 1 Fairly easy, suitable for beginner with some experience 2 Fairly difficult, suitable for competent DIY mechanic 3 Difficult, suitable for experienced DIY mechanic 4 Very difficult, suitable for expert DIY or professional 5 Specifications Front suspension Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Independent with MacPherson struts and coil springs Coil springs Free height: 903 cc models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1116 and 1301 cc models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Number of coils . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 334 mm (13.16 in) 342 mm (13.5 in) 4.25 Rear suspension Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Beam axle, trailing arms, coil springs and double-acting gas-filled shock absorbers Coil springs Free height . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Number of coils . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 246.5 mm (9.7 in) 2.75 Torque wrench settings Nm lbf ft Front suspension Driveshaft/hub nut . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Strut upper mounting nuts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Strut spindle nut . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Strut base clamp bolts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Track control arm balljoint nuts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Track control arm inboard mounting bolts . . . . . . . . . . . . . . . . . . . . . . . Roadwheel bolts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Crossmember bolts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 272 24 60 49 49 90 86 60 200 18 44 36 36 66 63 44 Rear suspension Trailing arm bracket to body bolts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Trailing arm pivot bolt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Shock absorber lower mounting bolt . . . . . . . . . . . . . . . . . . . . . . . . . . . Shock absorber upper mounting nuts . . . . . . . . . . . . . . . . . . . . . . . . . . Shock absorber spindle nut . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Roadwheel bolts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 70 30 12 30 86 15 52 22 9 22 63 11 11•2 Suspension Fig. 11.1 Front suspension arrangement (Sec 1) 1 General description The front suspension is of independent MacPherson strut type. The rear suspension consists of a beam axle with trailing arms, coil springs and double acting gas-filled telescopic shock absorbers. Operations covering the hubs, roadwheels and tyres are described in Chapter 7. 2 Maintenance 4 1 Periodically check the tightness of all suspension nuts and bolts using a torque wrench. 2 At the intervals specified in “Routine Maintenance” inspect all suspension rubber bushes for deterioration or wear. Renew where necessary. 3 Check for wear in the track control arm to hub carrier balljoint. Do this by raising the roadwheel and prising the control arm down. If the hub carrier is pulled outwards, any up and down movement or slackness will necessitate renewal of the track control arm, although it may be possible to obtain a balljoint repair kit from a motor factor. 4 A defective strut or shock absorber can usually be detected by the tendency of the car to pitch badly when braking or cornering. However the component can be tested more thoroughly in the following way. 5 Remove the strut and take off the coil spring or withdraw the rear shock absorber as described later in this Chapter. 6 Grip the strut or shock absorber lower mounting in the jaws of a vice and then fully extend and contract the unit five or six times, with the unit held in a vertical attitude. If there is any lack of resistance, jerkiness or seizure, then the unit will have to be renewed, no repair being possible. It is recommended that struts or Fig. 11.2 Rear suspension arrangement (Sec 1) shock absorbers are renewed in pairs as axle sets, in order to maintain similar suspension characteristics on both sides of the car. 7 Check for signs of hydraulic fluid leakage from around the front strut spindle gland and also the condition of the dust excluding boot. Oil leakage will mean a new unit, a split boot can be renewed after having withdrawn the coil spring. 1 Raise the front of the car, support it securely and remove the roadwheel. 2 Release the brake hydraulic hose from the strut by unscrewing the retaining clip bolt. 3 Unscrew and remove the two bolts from the clamp at the bottom of the strut, push the hub carrier down out of the clamp (photo). 4 Open the bonnet. Unscrew and remove the domed reinforcement cover. Then remove the strut top mounting nuts from the turret. Do not attempt to unscrew the centre spindle nut (photos). 5 Withdraw the strut downwards and out from under the wing (photo). 6 Coil spring clamps must now be fitted. These are available from most motor stores or can be hired (photo). 7 Once the spring has been compressed to 3.3 Strut clamp bolt 3.4A Strut reinforcement plate 3.4B Strut upper mounting nuts 3.5 Withdrawing a front strut 3 Front suspension strut removal and refitting 4 Suspension 11•3 release its top coil from the strut upper mounting, hold the flats on the strut spindle and unscrew the spindle nut. 8 Take off the upper mounting components and the clamped coil spring. The clamps need not be removed if the spring is to be fitted to a new strut. 9 Commence reassembly by fitting the coil spring onto the strut. Make sure that the smaller coil is at the top and the lower coil is up against its end stop in the spring seat. 10 Check that the strut boot is in position. 11 Fit the upper mounting components and screw on the spindle nut. 12 Gently release the spring clamps and remove them. 13 Refit the strut to the car by reversing the removal operations. Note: On cars built before 1985, when assembling the strut top mounting, apply a bead of sealant as shown in Figs. 11.4 and 11.5 to prevent the entry of water into the strut bearing. Later models are fitted with a rubber seal. 4 4 Front coil spring removal and refitting 1 The operations preceding Section. are covered in the 3.6 Spring clamps in position 2 The springs are colour coded according to model and a replacement must be of identical type to the original. 5 Front hub carrier removal and refitting 3 1 Disconnect the driveshaft from the hub carrier as described in Chapter 7, Section 2, paragraphs 1 to 8. 2 Unbolt the brake caliper and tie it up out of the way. 3 Unscrew the nut from the track control arm balljoint taper pin and then separate the Fig. 11.3 Front strut components (Sec 3) 1 Top mounting cover 2 Coil spring 3 Boot 4 5 6 7 Strut Hub carrier Track control arm Crossmember 11 Fig. 11.4 Waterproof bead applied to strut with top cover removed (Sec 3) Fig. 11.5 Waterproof bead applied to strut with top cover in position (Sec 3) 11•4 Suspension and remove them. Leave the steering rack hanging loose. 8 Remove the front crossmember mounting bolts and manoeuvre it from the car. 9 Refitting is a reversal of removal. Tighten all nuts and bolts to the specified torque wrench settings and on completion, check the front wheel alignment as described in Chapter 10. 8 Rear shock absorber removal and refitting 6.2 Separating track control arm balljoint from hub carrier 6.3 Track control arm inboard fixing balljoint from the hub carrier using a suitable “splitter” tool. If such a tool is not available, support the base of the brake disc and drive the balljoint taper pin downwards, but screw on the nut to protect the threads. 4 Remove the hub carrier. 5 Refitting is a reversal of removal, use a new driveshaft nut and tighten all nuts and bolts to the specified torque. Stake the driveshaft nut after tightening. may, however, be possible to obtain a replacement balljoint through a motor factor. 5 Refitting is a reversal of removal. Tighten all nuts and bolts to the specified torque. Use a new driveshaft nut and stake it into the driveshaft groove after tightening. 6 Track control arm removal and refitting 3 1 Raise the front of the car and support it securely. 2 Unless a special tool is available to press the track control arm balljoint from the hub carrier, the driveshaft will have to be disconnected as described in Chapter 7, Section 2, paragraphs 1 to 8 to provide more space to enable the balljoint taper pin to be driven from the hub carrier. This should now be done as described in the preceding Section (photo). 3 Unbolt the inboard end of the track control arm. This is retained by a pivot bolt and a clamp (photo). 4 As previously explained, a worn balljoint or flexible pivot bushes will necessitate renewal of the track control arm complete. Note that it Fig. 11.6 Steering rack mounting bolts (Sec 7) 7 Front crossmember removal and refitting 3 1 Raise the front of the car, support securely with axle stands placed under the side-members or sill jacking points. 2 Remove the front roadwheels. 3 Unscrew the nuts from the tie-rod end balljoint taper pins and then using a balljoint “splitter” tool disconnect the balljoints from the steering arms on the hub carrier. 4 Unscrew the bolts which hold the inboard track control arms to the body members, and also withdraw the pivot bolt from the body bracket. 5 Support the weight of the engine/ transmission using a hoist or support bar across the top of the engine compartment as described in Chapter 6. 6 Disconnect the lower (central) engine/ transmission flexible mounting from the floor pan. 7 Unscrew the steering rack mounting bolts Fig. 11.7 Front crossmember bolts (Sec 7) 3 1 Open the tailgate and remove the cover from the shock absorber top mounting which is located within the luggage area (photo). 2 Hold the flats on the spindle with an open-ended spanner and then unscrew the self-locking nut. 3 Working under the car, disconnect the shock absorber lower mounting. 4 Withdraw the unit from under the wing. 5 The shock absorber can be tested as described in Section 2. 6 Refitting is a reversal of removal. Tighten mounting nuts and bolts to the specified torque. 9 Rear coil spring removal and refitting 3 1 Raise the rear of the car and support it securely on axle stands placed under the side-members or sill jacking points. 2 Remove the roadwheel. 3 Place a jack under the brake drum and support the suspension trailing arm. 4 Disconnect the shock absorber lower mounting and then lower the trailing arm jack until the coil spring can be withdrawn. 5 Refitting is a reversal of removal. If the spring is being changed, make sure that it is of the same colour code as the original and that its lower coil is correctly located up against its stop in the spring pan. 6 Tighten the shock absorber lower mounting bolt to the specified torque. 8.1 Rear shock absorber upper mounting cover Suspension 11•5 Fig. 11.9 Removing trailing arm pivot bolt (Sec 10) 1 2 3 4 5 6 7 8 Trailing arm bracket Axle beam Buffer Shock absorber top mounting Coil spring Shock absorber Stub axle Hub Fig. 11.8 Rear suspension components (Sec 8) 10 Trailing arm rubber bush renewal 3 1 A worn trailing arm rubber bush may be renewed in the following way. 2 Raise the rear of the car and support securely on axle stands placed under the body side-members or sill jacking points. 3 Remove the roadwheels. 4 Unscrew and remove both pivot bolts which hold the forward ends of the trailing arms to the body brackets. Fig. 11.11 Handbrake cable and lever at brake backplate (Sec 11) 5 Pull the trailing arms downward out of the body brackets. 6 A two-legged puller may be used to press the old bush out and to force the new one in. Smear the bush with soapy water or brake fluid to facilitate fitting. 7 Reconnect the trailing arms to the body brackets. Use jacks if necessary to push the arms upwards into the brackets. 8 Tighten the pivot bolts to the specified torque, but only when the car has been located with four occupants or the equivalent plus 40 kg (88 lb) of luggage. 11.7 One side of the rear suspension Fig. 11.10 Method of renewing trailing arm bush (Sec 10) 11 Rear suspension removal and refitting 3 1 Raise the rear of the car, support it securely and remove the rear road wheels. 2 Unhook the brake pressure regulating valve arm tension spring from its bracket. 3 Disconnect the handbrake cables from the brake backplate levers. 4 Disconnect the flexible brake hose at its junction with the rigid pipeline adjacent to the pressure regulating valve. Cap the open ends of hose and pipe. 5 Support the trailing arms and then disconnect the shock absorber upper mountings. 6 Unbolt the trailing arm forward end support brackets from the body, lower the complete rear suspension and withdraw it from under the car. 7 Refitting is a reversal of removal, but tighten the trailing arm pivot bolts to the specified torque only when the car is loaded with four occupants and 40 kg (88 lb) of luggage (photo). 8 Bleed the brakes as described in Chapter 8. 11 11•6 Suspension Fault finding - suspension Note: Before diagnosing suspension defects, be sure that trouble is not due to incorrect or uneven tyre pressures, in inappropriate combinations. Car pulls to one side Car wanders or skips on rough surfaces m Worn or weak shock absorbers or struts on one side m Defective shock absorbers or struts Excessive roll on corners Vibration and wheel wobble m Weak shock absorbers or struts m Coil spring weak or cracked m Loose or defective shock absorbers or struts Excessive or uneven tyre wear m Worn suspension components 12•1 Chapter 12 Bodywork For modifications, and information applicable to later models, see Supplement at end of manual Contents Bonnet - removal and refitting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Bonnet - lock and release . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Centre console - removal and refitting . . . . . . . . . . . . . . . . . . . . . . . Door - dismantling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Door - removal and refitting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Door trim panel - removal and refitting . . . . . . . . . . . . . . . . . . . . . . . Facia panel - removal and refitting . . . . . . . . . . . . . . . . . . . . . . . . . . Fixed side window (five-door) - removal and refitting . . . . . . . . . . . . Front bumpers - removal and refitting . . . . . . . . . . . . . . . . . . . . . . . Front seat - removal and refitting . . . . . . . . . . . . . . . . . . . . . . . . . . . Front wing - removal and refitting . . . . . . . . . . . . . . . . . . . . . . . . . . . General description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Grab handles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Maintenance - bodywork and underframe . . . . . . . . . . . . . . . . . . . . 7 8 21 12 13 11 22 17 9 19 10 1 25 2 Maintenance - upholstery and carpets . . . . . . . . . . . . . . . . . . . . . . . Major body damage - repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Minor body damage - repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Opening side window (three-door) - removal and refitting . . . . . . . . Radiator grille - removal and refitting . . . . . . . . . . . . . . . . . . . . . . . . Rear bumpers - removal and refitting . . . . . . . . . . . . . . . . . . . . . . . . Rear seat - removal and refitting . . . . . . . . . . . . . . . . . . . . . . . . . . . . Rear view mirrors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Roof rack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Seat belts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Sunroof - operation and maintenance . . . . . . . . . . . . . . . . . . . . . . . Tailgate - removal and refitting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Tailgate glass - removal and refitting . . . . . . . . . . . . . . . . . . . . . . . . Windscreen glass - removal and refitting . . . . . . . . . . . . . . . . . . . . . 3 5 4 18 6 26 20 24 27 23 28 14 16 15 Degrees of difficulty Easy, suitable for novice with little experience 1 Fairly easy, suitable for beginner with some experience 2 Fairly difficult, suitable for competent DIY mechanic 3 Difficult, suitable for experienced DIY mechanic 4 Very difficult, suitable for expert DIY or professional 5 Specifications For dimensions, weights etc. refer to the Introductory Section of this Manual. 1 General description The Uno is an all steel, welded Hatchback of unitary construction available in three- or five-door versions. Various levels of trim and equipment are available depending upon model. Factory fitted options include a sunroof, central door locking and electrically-operated front windows. 2 Maintenance bodywork and underframe 1 The general condition of a vehicle’s bodywork is the one thing that significantly affects its value. Maintenance is easy, but needs to be regular. Neglect, particularly after minor damage, can lead quickly to further deterioration and costly repair bills. It is important also to keep watch on those parts of the vehicle not immediately visible, for instance the underside, inside all the wheel arches, and the lower part of the engine compartment. The basic maintenance routine for the bodywork is washing - preferably with a lot of water, from a hose. This will remove all the loose solids which may have stuck to the vehicle. It is important to flush these off in such a way as to prevent grit from scratching the finish. The wheel arches and underframe need washing in the same way, to remove any accumulated mud, which will retain moisture and tend to encourage rust. Paradoxically enough, the best time to clean the underframe and wheel arches is in wet weather, when the mud is thoroughly wet and soft. In very wet weather, the underframe is usually cleaned of large accumulations automatically, and this is a good time for inspection. Periodically, except on vehicles with a waxbased underbody protective coating, it is a good idea to have the whole of the underframe of the vehicle steam-cleaned, engine compartment included, so that a thorough inspection can be carried out to see what minor repairs and renovations are necessary. Steam-cleaning is available at many garages, and is necessary for the removal of the accumulation of oily grime, which sometimes is allowed to become thick in certain areas. If steam-cleaning facilities are not available, there are some excellent grease solvents available which can be brush- applied; the dirt can then be simply hosed off. Note that these methods should not be used on vehicles with wax-based underbody protective coating, or the coating will be removed. Such vehicles should be inspected annually, preferably just prior to Winter, when the underbody should be washed down, and any damage to the wax coating repaired. Ideally, a completely fresh coat should be applied. It would also be worth considering the use of such wax-based protection for injection into door panels, sills, box sections, etc, as an additional safeguard against rust damage, where such protection is not provided by the vehicle manufacturer. After washing paintwork, wipe off with a chamois leather to give an unspotted clear finish. A coat of clear protective wax polish will give added protection against chemical pollutants in the air. If the paintwork sheen has dulled or oxidised, use a cleaner/polisher combination to restore the brilliance of the shine. This requires a little effort, but such dulling is usually caused because regular washing has been neglected. Care needs to be taken with metallic paintwork, as special non-abrasive cleaner/polisher is required to avoid damage to the finish. Always check that the door and ventilator opening drain holes and pipes are completely clear, so that water 12 12•2 Bodywork 2.4A Door drain hole 2.4B Sill drain with non-return valve can be drained out (photos). Brightwork should be treated in the same way as paintwork. Windscreens and windows can be kept clear of the smeary film which often appears, by the use of proprietary glass cleaner. Never use any form of wax or other body or chromium polish on glass. details on more ambitious repairs involving welding and panel beating. 3 Maintenance upholstery and carpets 1 Mats and carpets should be brushed or vacuum-cleaned regularly, to keep them free of grit. If they are badly stained, remove them from the vehicle for scrubbing or sponging, and make quite sure they are dry before refitting. Seats and interior trim panels can be kept clean by wiping with a damp cloth. If they do become stained (which can be more apparent on light-coloured upholstery), use a little liquid detergent and a soft nail brush to scour the grime out of the grain of the material. Do not forget to keep the headlining clean in the same way as the upholstery. When using liquid cleaners inside the vehicle, do not over-wet the surfaces being cleaned. Excessive damp could get into the seams and padded interior, causing stains, offensive odours or even rot. If the inside of the vehicle gets wet accidentally, it is worthwhile taking some trouble to dry it out properly, particularly where carpets are involved. Do not leave oil or electric heaters inside the vehicle for this purpose. 4 Minor body damage repair 3 Note: For more detailed information about bodywork repair, Haynes Publishing produce a book by Lindsay Porter called “The Car Bodywork Repair Manual”. This incorporates information on such aspects as rust treatment, painting and glass-fibre repairs, as well as Repairs of minor scratches in bodywork If the scratch is very superficial, and does not penetrate to the metal of the bodywork, repair is very simple. Lightly rub the area of the scratch with a paintwork renovator, or a very fine cutting paste, to remove loose paint from the scratch, and to clear the surrounding bodywork of wax polish. Rinse the area with clean water. Apply touch-up paint to the scratch using a fine paint brush; continue to apply fine layers of paint until the surface of the paint in the scratch is level with the surrounding paintwork. Allow the new paint at least two weeks to harden, then blend it into the surrounding paintwork by rubbing the scratch area with a paintwork renovator or a very fine cutting paste. Finally, apply wax polish. Where the scratch has penetrated right through to the metal of the bodywork, causing the metal to rust, a different repair technique is required. Remove any loose rust from the bottom of the scratch with a penknife, then apply rust-inhibiting paint to prevent the formation of rust in the future. Using a rubber or nylon applicator, fill the scratch with bodystopper paste. If required, this paste can be mixed with cellulose thinners to provide a very thin paste which is ideal for filling narrow scratches. Before the stopper-paste in the scratch hardens, wrap a piece of smooth cotton rag around the top of a finger. Dip the finger in cellulose thinners, and quickly sweep it across the surface of the stopper-paste in the scratch; this will ensure that the surface of the stopper-paste is slightly hollowed. The scratch can now be painted over as described earlier in this Section. Repairs of dents in bodywork When deep denting of the vehicle’s bodywork has taken place, the first task is to pull the dent out, until the affected bodywork almost attains its original shape. There is little point in trying to restore the original shape completely, as the metal in the damaged area will have stretched on impact, and cannot be reshaped fully to its original contour. It is better to bring the level of the dent up to a point which is about 3 mm below the level of the surrounding bodywork. In cases where the dent is very shallow anyway, it is not worth trying to pull it out at all. If the underside of the dent is accessible, it can be hammered out gently from behind, using a mallet with a wooden or plastic head. Whilst doing this, hold a suitable block of wood firmly against the outside of the panel, to absorb the impact from the hammer blows and thus prevent a large area of the bodywork from being “belled-out”. Should the dent be in a section of the bodywork which has a double skin, or some other factor making it inaccessible from behind, a different technique is called for. Drill several small holes through the metal inside the area - particularly in the deeper section. Then screw long self-tapping screws into the holes, just sufficiently for them to gain a good purchase in the metal. Now the dent can be pulled out by pulling on the protruding heads of the screws with a pair of pliers. The next stage of the repair is the removal of the paint from the damaged area, and from an inch or so of the surrounding “sound” bodywork. This is accomplished most easily by using a wire brush or abrasive pad on a power drill, although it can be done just as effectively by hand, using sheets of abrasive paper. To complete the preparation for filling, score the surface of the bare metal with a screwdriver or the tang of a file, or alternatively, drill small holes in the affected area. This will provide a really good “key” for the filler paste. To complete the repair, see the Section on filling and respraying. Repairs of rust holes or gashes in bodywork Remove all paint from the affected area, and from an inch or so of the surrounding “sound” bodywork, using an abrasive pad or a wire brush on a power drill. If these are not available, a few sheets of abrasive paper will do the job most effectively. With the paint removed, you will be able to judge the severity of the corrosion, and therefore decide whether to renew the whole panel (if this is possible) or to repair the affected area. New body panels are not as expensive as most people think, and it is often quicker and more satisfactory to fit a new panel than to attempt to repair large areas of corrosion. Remove all fittings from the affected area, except those which will act as a guide to the original shape of the damaged bodywork (eg headlight shells etc). Then, using tin snips or a hacksaw blade, remove all loose metal and any other metal badly affected by corrosion. Hammer the edges of the hole inwards, in order to create a slight depression for the filler paste. Wire-brush the affected area to remove the powdery rust from the surface of the remaining metal. Paint the Bodywork 12•3 affected area with rust-inhibiting paint, if the back of the rusted area is accessible, treat this also. Before filling can take place, it will be necessary to block the hole in some way. This can be achieved by the use of aluminium or plastic mesh, or aluminium tape. Aluminium or plastic mesh, or glass-fibre matting, is probably the best material to use for a large hole. Cut a piece to the approximate size and shape of the hole to be filled, then position it in the hole so that its edges are below the level of the surrounding bodywork. It can be retained in position by several blobs of filler paste around its periphery. Aluminium tape should be used for small or very narrow holes. Pull a piece off the roll, trim it to the approximate size and shape required, then pull off the backing paper (if used) and stick the tape over the hole; it can be overlapped if the thickness of one piece is insufficient. Burnish down the edges of the tape with the handle of a screwdriver or similar, to ensure that the tape is securely attached to the metal underneath. Bodywork repairs - filling and respraying Before using this Section, see the Sections on dent, deep scratch, rust holes and gash repairs. Many types of bodyfiller are available, but generally speaking, those proprietary kits which contain a tin of filler paste and a tube of resin hardener are best for this type of repair. A wide, flexible plastic or nylon applicator will be found invaluable for imparting a smooth and well-contoured finish to the surface of the filler. Mix up a little filler on a clean piece of card or board - measure the hardener carefully (follow the maker’s instructions on the pack), otherwise the filler will set too rapidly or too slowly. Using the applicator, apply the filler paste to the prepared area; draw the applicator across the surface of the filler to achieve the correct contour and to level the surface. As soon as a contour that approximates to the correct one is achieved, stop working the paste - if you carry on too long, the paste will become sticky and begin to “pick-up” on the applicator. Continue to add thin layers of filler paste at 20-minute intervals, until the level of the filler is just proud of the surrounding bodywork. Once the filler has hardened, the excess can be removed using a metal plane or file. From then on, progressively-finer grades of abrasive paper should be used, starting with a 40-grade production paper, and finishing with a 400-grade wet-and-dry paper. Always wrap the abrasive paper around a flat rubber, cork, or wooden block - otherwise the surface of the filler will not be completely flat. During the smoothing of the filler surface, the wet-anddry paper should be periodically rinsed in water. This will ensure that a very smooth finish is imparted to the filler at the final stage. At this stage, the “dent” should be surrounded by a ring of bare metal, which in turn should be encircled by the finely “feathered” edge of the good paintwork. Rinse the repair area with clean water, until all of the dust produced by the rubbing-down operation has gone. Spray the whole area with a light coat of primer - this will show up any imperfections in the surface of the filler. Repair these imperfections with fresh filler paste or bodystopper, and once more smooth the surface with abrasive paper. Repeat this spray-and-repair procedure until you are satisfied that the surface of the filler, and the feathered edge of the paintwork, are perfect. Clean the repair area with clean water, and allow to dry fully. If bodystopper is used, it can be mixed with cellulose thinners to form a really thin paste which is ideal for filling small holes The repair area is now ready for final spraying. Paint spraying must be carried out in a warm, dry, windless and dust-free atmosphere. This condition can be created artificially if you have access to a large indoor working area, but if you are forced to work in the open, you will have to pick your day very carefully. If you are working indoors, dousing the floor in the work area with water will help to settle the dust which would otherwise be in the atmosphere. If the repair area is confined to one body panel, mask off the surrounding panels; this will help to minimise the effects of a slight mis-match in paint colours. Bodywork fittings (eg chrome strips, door handles etc) will also need to be masked off. Use genuine masking tape, and several thicknesses of newspaper, for the masking operations. Before commencing to spray, agitate the aerosol can thoroughly, then spray a test area (an old tin, or similar) until the technique is mastered. Cover the repair area with a thick coat of primer; the thickness should be built up using several thin layers of paint, rather than one thick one. Using 400-grade wet-anddry paper, rub down the surface of the primer until it is really smooth. While doing this, the work area should be thoroughly doused with water, and the wet-and-dry paper periodically rinsed in water. Allow to dry before spraying on more paint. Spray on the top coat, again building up the thickness by using several thin layers of paint. Start spraying at one edge of the repair area, and then, using a side-to-side motion, work until the whole repair area and about 2 inches of the surrounding original paintwork is covered. Remove all masking material 10 to 15 minutes after spraying on the final coat of paint. Allow the new paint at least two weeks to harden, then, using a paintwork renovator, or a very fine cutting paste, blend the edges of the paint into the existing paintwork. Finally, apply wax polish. 5 Major body damage repair 5 1 Major repair to the body should be left to your Fiat dealer or specialist body repairer. 2 Special jigs and alignment gauges are required without which steering and suspension characteristics may be incorrect after the repairs are completed. 6 Radiator grille removal and refitting 1 1 Open the bonnet. 2 Extract the single fixing screw from the centre of the grille slats (photo). 3 Release the retaining clips and withdraw the grille upwards from its lower spigot holes (photo). 4 Refitting is a reversal of removal. 7 Bonnet removal and refitting 1 1 Open the bonnet and support it on its stay. 2 Pencil around the hinges on the underside 12 6.2 Grille screw 6.3 Grille clip 12•4 Bodywork 7.2 Bonnet hinge of the bonnet or stick strips of masking tape around them as a guide to refitting (photo). 3 With the help of an assistant, support the weight of the bonnet, unbolt the hinges and lift the bonnet from the car. 4 Refitting is a reversal of removal, but do not fully tighten the hinge bolts until the bonnet has been gently closed and its alignment checked. If the gap between the bonnet and the front wings is not equal on both sides, release the hinge bolts and move the bonnet within the elongation provided at the bolt holes. 8.1 Bonnet release lever 8 Bonnet lock and release 8.2 Bonnet lock 1 1 The bonnet lock is operated by a remote control lever inside the car through a cable (photo). 2 When closing the bonnet, the spring-loaded striker should enter the lock centrally. If it does not, release the lock bolts and slide the lock as necessary (photo). 3 Engagement of the striker in the lock should be adjusted for depth in order that the surface of the bonnet is level with the front wings. To do this, release the striker locknut and turn the striker in or out by inserting a screwdriver in its slot. 4 In conjunction with the striker adjustment, screw the bonnet rubber buffers in or out as necessary to provide secure rattle-free closure of the bonnet (photo). 5 If the lock must be removed, first withdraw the radiator grille as described in Section 6. 6 To renew the release cable, unclip and lower the release lever under the facia panel. 7 Disconnect the cable from the lever and then slip it from the lock operating arm. Withdraw the cable. 8 Refit the new cable by reversing the removal operations. 9 Front bumpers removal and refitting Fig. 12.1 Bonnet lock and release cable (Sec 8) 8.4 Bonnet buffer Fig. 12.2 Adjusting bonnet lock striker (Sec 8) 1 1 Remove the radiator grille as described in Section 6 to expose the two upper bumper fixing screws. Remove them (photos). 2 Working inside at the lower edge of the bumper remove the three fixing bolts. 3 Finally, unscrew the side bracket fixing bolts and lift the bumper away. 4 Refitting is a reversal of removal. 9.1A Front bumper upper fixing screw Bodywork 12•5 9.1B Front bumper upper fixing screw Fig. 12.3 Front bumper (Sec 9) Fig. 12.4 Front bumper upper screws (Sec 9) 10 Front wing removal and refitting 1 1 Remove the headlamp and front parking lamp as described in Chapter 9. 10.4A Unscrewing wing shield screw Fig. 12.5 Front bumper lower screws (Sec 9) 2 Withdraw the side repeater lamp and disconnect the leads. 3 Remove the front roadwheel. 4 Working under the wing, remove the fixing screw and withdraw the plastic protective shield (photos). 5 Unscrew the wing lower fixing screws at the front and rear ends. 6 Open the bonnet and support it. Then unscrew and remove the row of fixing screws from the inner top edge of the wing. 7 The wing joints will have to be cut round with a sharp knife to release the mastic seal before the wing can be lifted away. 8 Clean the body mating flanges in readiness for fitting the new wing. 9 Apply a bead of mastic to the body flanges and offer the new wing into position. 10 Refit the fixing screws. 11 Apply protective coating to the underside of the wing and refinish the outer surface to match the bodywork. 12 Refit the headlamp, parking lamp and repeater lamp. 13 Fit the under wing shield and the roadwheel, close the bonnet. 11 Door trim panel removal and refitting 1 1 Open the door and extract the three armrest fixing screws. Remove the armrest in a downward direction (photos). 2 Remove the screws from the door tidy bin (photo). 3 Push the door remote control escutcheon rearwards towards the door lock and remove it (photos). 4 Remove the window regulator handle spring clip. Do this by inserting a length of wire with a hooked end or by pulling a strip of 12 10.4B Removing wing shield 11.1A Removing an armrest screw 11.1B Removing armrest downward 12•6 Bodywork 11.2 Door tidy bin screw 11.3A Removing remote control handle escutcheon 11.3B Remote control handle withdrawn 11.4 Window regulator handle removed 11.6 Removing door trim panel 11.7 Window regulator handle ready for fitting Fig. 12.6 Door glass mounting screw (Sec 12) Fig. 12.7 Removing door weatherseal (Sec 12) Fig. 12.8 Removing door glass (Sec 12) Fig. 12.9 Door window regulator fixing screws (Sec 12) rag between the handle and the door trim panel at its lower gap (photo). 5 Insert the fingers or a broad blade between the trim panel and the door and release the panel. 6 Remove the trim panel and the waterproof sheet (photo). 7 Refitting is a reversal of removal, but when refitting the window regulator handle locate its retaining spring clip fully and then simply locate the handle on its splined shaft and strike it sharply with the hand. Make sure that with the window fully closed, the angle of the regulator handle matches the one on the opposite door (photo). 12 Door - dismantling 3 1 Remove the trim panel as described in the preceding Section. Lock remote control handle 2 Slide the handle rearwards to disengage the tabs from the cut-outs. 3 Rotate the lock handle and disconnect it from the link rod. Door glass 4 Extract the screws from the glass mounting. 5 With the glass fully lowered, remove the weatherseal strips from the glass slot in the door. Bodywork 12•7 12.7 Door glass mounting Fig. 12.10 Removing door window regulator (Sec 12) Fig. 12.11 Removing door handle fixing screw (three-door model) (Sec 12) Fig. 12.12 Extracting glass guide channel screw (Sec 12) Fig. 12.13 Removing glass guide channel (Sec 12) Fig. 12.14 Removing door lock fixing screw (Sec 12) 6 Turn the glass very carefully and withdraw it from the door. A new glass is supplied complete with lower mounting. 10 Extract the screws which hold the lock to the edge of the door and remove it. Window regulator 7 Extract the fixing screws (arrowed) (Fig. 12.9) and withdraw the regulator from the door through one of the larger lower apertures (photo). Door lock (three-door) 8 Extract the screw and remove the handle from the edge of the door. 9 Remove the glass guide channel fixing bolts and withdraw the channel from the door. Door lock (five-door) 11 Extract the screws which hold the lock to the door edge. Withdraw the lock and disconnect the lock plunger link rod (photo). 12 The exterior handle with cylinder lock can be removed by reaching into the door cavity and unscrewing the two fixing nuts. Refitting 13 This is a reversal of the removal operations. Oil and grease the lock and window regulator mechanism. 13 Door removal and refitting 1 1 Open the door fully and support it under its lower edge on jacks or blocks covered with an insulating pad. 2 The door hinges are fixed to the doors with hexagonal headed bolts and to the body pillar with socket-headed bolts. 3 The door check is incorporated in the lower hinge (photo). 4 On cars equipped with door mounted 12 Fig. 12.15 Door lock components (Sec 12) 12.11 Door lock plunger rod 12•8 Bodywork 13.3 Door lower hinge 13.9 Door lock striker 14.2 Tailgate strut ball cup speakers, central door locking or power operated windows, the electrical leads must be disconnected and withdrawn through the flexible duct before the door hinges are unbolted. Disconnection will require removal of the door trim panel as described in Section 11. 5 It is recommended that the door is unbolted from the hinge, leaving the hinge attached to the body pillar. 6 Refitting is a reversal of removal, but leave the bolts finger tight until the door has been gently closed and its alignment checked. 7 The door can be moved up and down or sideways using the travel provided by the elongated bolt holes. 8 If the door is not flush with the adjacent body panels then shims should be inserted under the hinges. 9 Adjust the striker to provide smooth positive closure (photo). re-alignment is required, then the rear section of the roof lining will have to be removed and the hinge to body bolts released. 6 Adjust the position of the lock striker to provide smooth positive closure. The rubber buffers should be screwed in or out in conjunction with the adjustment of the striker (photos). 7 On some models, a remote control tailgate opening release lever is fitted. Removal and refitting of the cable is similar to that described in Section 8 (photo). 14 Tailgate removal and refitting 1 1 Open the tailgate and have an assistant support it. 2 From the upper ends of the struts, prise out the locking wedges from the ball cups and disconnect the struts (photo). 3 Disconnect the washer tube. 4 Unscrew the hinge mounting bolts from the tailgate and lift the tailgate from the car (photo). 5 Refitting is a reversal of removal, but if 15 Windscreen glass removal and refitting 5 14.4 Tailgate hinge 14.6A Tailgate lock 1 Remove the interior rear view mirror, the tax disc and the wiper blade and arm. 2 If the glass is intact, go inside the car and pull the lip of the weatherseal downwards off the body metal all along the top edge. 3 Push the glass outwards while an assistant stands outside ready to catch it. 4 Clean the body flange and fit the weatherstrip to the glass. 5 Insert a length of strong cord in the body flange groove of the weatherseal so that the ends of the cord cross over at the centre of the bottom run and hang out a few inches. 6 Brush soapy water onto the edge of the body flange and then offer the glass to the 14.6B Tailgate striker 14.6C Tailgate rubber buffer 14.7 Tailgate remote control release lever Bodywork 12•9 Fig. 12.16 Peeling back lip of windscreen glass weatherseal (Sec 15) Fig. 12.18 Components of opening side window (Sec 18) 17 Fixed side window (five-door) removal and refitting Fig. 12.17 Position of cord for fitting windscreen weatherseal (Sec 15) body so that the bottom edge of the rubber seal engages over the metal flange. 7 With an assistant pressing on the outside of the glass, go inside and pull the cords evenly. This will draw the lip of the weatherseal over the body flange and seat the glass. 8 Tap the glass with the palm of the hand to settle it. 9 If the weatherseal is in good condition then it should prove waterproof, but if there is any doubt, apply sealant with a gun between the rubber and the glass and the rubber and the body flange. 10 Refit the mirror, tax disc and wiper. 16 Tailgate glass removal and refitting 5 1 The operations are very similar to those described for the windscreen, but disconnect the leads from the heater element terminals. 5 1 The operations are similar to those described for the windscreen in Section 15. 18 Opening side window (three-door) removal and refitting 1 1 Have an assistant support the glass and then extract the screws from the hinges and the toggle type fastener. 2 Swivel the glass outwards and downwards to remove it. 3 Refitting is a reversal of removal. 19 Front seat removal and refitting 1 1 Unbolt the seat front anchorage clamps (photo). 2 Slide the seat fully rearwards out of its guide rails, but bend the end of the seat adjustment lever so that it passes over its stop. 20 Rear seat removal and refitting 1 1 The rear seat may be of one piece design or split (60/40) depending upon the model. 2 Either type of seat is easily removable once the hinge bolts have been unscrewed and removed (photo). 21 Centre console removal and refitting 1 1 Pull the small black knobs from the heater control levers. 2 Extract the screws from both sides of the heater control panel, remove the panel. As the panel is withdrawn, disconnect the leads from the cigar lighter and take care not to damage the fibre optics. 3 From inside the glove box, prise out the lid stop block. Insert a screwdriver in the hole left by its removal and unscrew the console fixing screw (photo). 12 19.1 Front seat mounting clamp 20.2 Rear seat mounting hinges 21.3 Removing screw (glovebox side) from centre console 12•10 Bodywork Fig. 12.19 Facia panel fixing screws (Sec 22) 22.5C Facia panel lower mounting screw (left-hand side) 22.5A Facia fixing screw inside glovebox Fig. 12.20 Rear view of facia panel showing fixing screw locations (Sec 22) 1 and 5 Clips 2, 3 and 4 Screws 4 Reach up behind the facia panel on the side opposite to the glove box and unscrew the remaining console fixing screw. 5 Withdraw the console downwards and disconnect the fibre optics from their source. 6 Refitting is a reversal of removal. 22 Facia panel removal and refitting 23.3 Front seat belt lower mounting 23.4 Rear seat belt reel 22.5B Facia panel lower mounting screw at centre console 1 1 Remove the instrument panel as described in Chapter 9. 2 Remove the steering wheel (Chapter 10). 23.5 Front seat belt upper mounting 3 Disconnect the choke control lever and cable from the facia panel as described in Chapter 3. 4 Remove the screws arrowed in Fig. 12.19. 5 Remove the facia fixing screws, their locations on the facia are shown in Fig. 12.20. Screw (3) is inside the glove box (photos). 6 Release the facia from the upper clips and withdraw it. 7 Refitting is a reversal of removal. 23 Seat belts 1 1 Seat belts are fitted as standard equipment to both the front and rear seats. 2 Regularly inspect the belts for fraying and if evident, renew the belt. 3 The front belt reel may be unbolted if the seat is pushed fully forward and the reel cover panel removed (photo). 4 The rear belt reels are located at each side of the luggage area (photo). 5 When removing or refitting a belt from its anchorage point, it is essential to maintain the original fitted sequence of spacer, washer and wave washer otherwise the belt anchor plate will not swivel (photo). Bodywork 12•11 24.2 Exterior mirror control knob 24.3 Mirror ring nut and C-spanner 24.4 Withdrawing exterior mirror and trim plate 25.1 Grab handle screw Fig. 12.21 Rear bumper (Sec 26) 24 Rear view mirrors 1 Interior 1 The mirror may be removed after extracting the fixing screws. The mirror is designed to break off if struck. Exterior 2 The mirror is remotely controlled. To remove the mirror, peel back the rubber cover from the control knob (photo). 3 Unscrew the ring nut using a C-spanner or similar (photo). 4 Withdraw the mirror from its mounting hole, the triangular trim plate will come with it. Refitting is a reversal of removal (photo). 26 Rear bumpers removal and refitting 1 1 Refer to Chapter 9 and withdraw the number plate lamp. Disconnect the leads. 2 Open the tailgate and three bumper fixing bolts from the top edge. 3 Working under the car, remove the two side and the three lower edge fixing bolts. 4 Remove the bumper from the car. 5 Refitting is a reversal of removal. 27 Roof rack 1 1 As the car is not fitted with conventional type rain water gutters, the Fiat roof rack should be used which incorporates clamps which engage under the door arches. The doors are then closed on them. 2 On three-door models, the rear clamps fit into recesses provided just above the rear side window weatherseals. 12 25 Grab handles 1 1 These are located above the door openings and can be removed if the end covers are prised back on their hinges to expose the fixing screws (photo). Fig. 12.22 Roof rack clamp locations (Sec 27) Fig. 12.23 Sunroof control handle (A) (Sec 28) 12•12 Bodywork 28 Sunroof operation and maintenance Fig. 12.24 Prising out sunroof glass panel screw caps (Sec 28) Fig. 12.25 Extracting sunroof panel screw (Sec 28) 1 To unlock the sunroof, bring the control lever down and turn it anti-clockwise. The glass sunroof will partially rise and then slide rearwards. 2 A sliding louvre is provided to decrease noise and airflow. 3 On cars fitted with a sunroof, the interior lamps are of pillar-mounted type. 4 If the sunroof must be removed, prise out the screw caps using a thin blade. 5 Extract the screws which hold the glass panel to the rails. 6 The sunroof channel water drain hoses should be kept clear. If the hoses are to be cleared of obstruction remove the trim panels at the sides of the front footwells and insert a length of curtain spring in the bottom ends of the hoses. 7 The rear drain hoses are accessible once the parcels shelf supports are removed and the trim panels unclipped. Fig. 12.26 Rear parcels shelf supports (Sec 28) Fig. 12.27 Sunroof front drainhose routing at body pillar (Sec 28) 1 Fig. 12.28 Sunroof components (Sec 28) 13•1 Chapter 13 Supplement: Revisions and information on later models Contents Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Routine maintenance - all models from June 1991 . . . . . . . . . . . 3 Engine 903 and 1299/1301 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Sump pan sealing strips (903 cc engine) - modification 1299 cc engine - description Rocker cover (903 cc engine) - removal Cylinder head (903 cc engine) - refitting Engine - 999 and 1108 cc (FIRE) . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Part A: General Description Part B: Operations possible with engine in car Valve clearances - adjustment Timing belt - renewal Camshaft - removal and refitting Cylinder head - removal and refitting Sump pan - removal and refitting Oil pump - removal, checking and refitting Pistons/connecting rods - removal and refitting Pistons/connecting rods - separation and piston ring renewal Engine/transmission mountings - renewal Part C: Engine removal and dismantling Method of removal - general Engine/transmission - removal and separation Dismantling - general Complete dismantling Examination and renovation Part D: Engine reassembly and refitting Reassembly - general Complete reassembly Engine/transmission - reconnection and refitting Initial start-up after major overhaul Engine 1301 cc Turbo ie .................................................................. 6 Part A: General Description Lubrication system - description Part B: Operations possible with engine in car Camshaft and camshaft carrier - removal and refitting Cylinder head - removal and refitting Piston rings Engine mountings - renewal Timing belt - renewal Oil pump drivegear cover plate Engine oil cooler - removal and refitting Part C: Engine removal, dismantling, reassembly and refitting Engine/transmission - removal and separation Engine - dismantling and reassembly Engine/transmission - reconnection and refitting Initial start-up after major overhaul Engine 1372 cc ie and 1372 cc Turbo ie ......................................... 7 Part A: General Description Maintenance Part B: Operations possible with the engine in car Valve clearances - checking and adjustment Timing belt, tensioner and sprockets - removal and refitting Camshaft front oil seal - renewal Camshaft, housing and followers - removal and refitting Camshaft housing, camshaft and cam followers - dismantling, inspection and reassembly Cylinder head (1372 cc ie engine) - removal and refitting Cylinder head (1372 cc Turbo ie engine) - removal and refitting Cylinder head - inspection and renovation Crankshaft front oil seal - removal and renewal Crankshaft rear oil seal - removal and renewal Flywheel - removal, inspection and refitting Sump - removal and refitting Oil pump - removal, checking and refitting Pistons/connecting rods - removal and refitting Pistons/connecting rods - examination and renovation Engine/transmission mountings - renewal Part C: Engine removal and dismantling Method of removal - general 1372 cc ie engine/transmission - removal and separation 1372 cc Turbo ie engine/transmission - removal and separation Engine dismantling - general Auxiliary shaft - removal, inspection and refitting Engine - complete dismantling Crankshaft and main bearings - removal Engine components - examination and renovation Part D: Engine reassembly Reassembly - general Crankshaft and main bearings - refitting Pistons and connecting rods - refitting Oil pump - refitting Sump - refitting Flywheel - refitting Auxiliary shaft - refitting Cylinder head - refitting Timing belt and covers - refitting Engine/transmission - reconnection and refitting Initial start-up after major overhaul 13 13•2 Supplement: Revisions and information on later models Cooling system ................................................................................. 8 Part A: 999 cc engine Description Maintenance Thermostat - removal and refitting Coolant pump - removal and refitting Part B: 1301 cc Turbo ie engine Description Part C: 1372 cc ie and 1372 cc Turbo ie engines Description Maintenance Cooling system - draining, flushing and refilling Radiator (and cooling fan) - removal and refitting Thermostat - removal and refitting Coolant pump - removal and refitting Coolant pump/alternator drivebelt - checking, renewal and tensioning Part D: Heater unit later models Heater unit - removal and refitting Heater unit - dismantling and reassembly Fuel and exhaust systems ............................................................... 9 Part A: General Unleaded fuel Air cleaner modified types Fuel pump (999 cc engine) - description, removal and refitting Fuel tank (999 cc engine) Part B: Carburettor models Carburettor (Weber 32 TLF) - description Carburettor (Weber 32 TLF) - idle speed and mixture Carburettor (Weber 32 TLF) - removal and refitting Carburettor (Weber 32 TLF) - overhaul Carburettor (Weber 30/32 DMTE) - general Carburettor (Weber 30/32 DMTE) - overhaul Carburettor (Weber 32 ICEV 61/250 and DMTE 30/32, DMTE 30/150) - general Carburettor (Solex C 30/32-CIC 8) - description Part C: Bosch LE-2 Jetronic fuel injection system Description Maintenance Fuel filter - renewal Air cleaner element - renewal Idle speed and mixture - adjustment Fuel injection system - electrical tests Fuel injection system - mechanical tests Fuel injection system components - removal and refitting Throttle control linkage - general Fuel tank - general Part D: Bosch Mono-Jetronic fuel injection system Description Maintenance Fuel filter - renewal Air cleaner element - renewal Idle speed and mixture adjustment Accelerator control system - check and adjustment Fuel system - depressurisation Fuel pump and supply - system checks Fuel pump - removal and refitting Injector unit - removal and refitting Intake air temperature sensor - removal and refitting Fuel injector - removal and refitting Electronic control unit (ECU) - removal and refitting Inlet manifold - removal and refitting Exhaust manifold - removal and refitting Catalytic converter - general information Fuel evaporation control system - general Part E: Bosch L3.1/2 Jetronic fuel injection systems Description Fuel system - depressurisation Maintenance Fuel filter - renewal Air cleaner element - renewal Checks and adjustments Injection system components - removal and refitting Part G: Turbocharger system Description Precautions Turbocharger (1301 cc ie engine) - removal and refitting Turbocharger (1372 cc ie engine) - removal and refitting Intercooler - removal and refitting Injector cooling fan - removal and refitting Fault finding - fuel injection system Fault finding - turbocharger system Ignition system ................................................................................. 10 General Ignition timing (all later models) Breakerless ignition system - description Distributor (breakerless type) - removal and refitting Distributor (breakerless type) - overhaul Breakerless ignition system components - testing Microplex ignition system - description Distributor (Microplex) - removal and refitting Microplex ignition system components - testing Digiplex 2 ignition system - description Distributor (Digiplex 2) - removal and refitting Spark plugs and HT leads - general Fault finding - Microplex ignition system Clutch ................................................................................................ 11 Clutch pedal adjustment (cable clutch) Hydraulic clutch - description Maintenance (hydraulic clutch) Clutch master cylinder - removal, overhaul and refitting Clutch operating cylinder - removal, overhaul and refitting Clutch hydraulic system - bleeding Transmission .................................................................................... 12 Part A: 1301 cc Turbo ie engine Description Gearchange linkage - removal and refitting Gearchange linkage (Antiskid models) - general Final drive output shafts - description and oil seal renewal Part B: 1372 cc ie and 1372 cc Turbo ie engines Description Maintenance Oil level - checking Oil - renewal Gearlever and linkages - general Transmission - removal and refitting Part C: 999 and 1108 cc with C514 type transmission Description Maintenance Driveshafts ........................................................................................ 13 Inboard joint boots (non-Turbo models, September 1987 on) modification Intermediate driveshaft (Turbo ie models) Inboard CV joints (Turbo ie models - overhaul Right-hand driveshaft damper weight (1108 and 1372 cc models) - removal and refitting Supplement: Revisions and information on later models 13•3 Braking system................................................................................. 14 Part A: Braking system general Front brake pads all later models Part B: Braking system - Turbo ie models Description Front disc pads - renewal Front disc caliper - removal and refitting Front disc caliper - overhaul Front brake disc - inspection, renovation or renewal Rear disc pads - renewal Rear disc caliper - removal, overhaul and refitting Rear brake disc - inspection, renovation and renewal Pressure regulating valve Brake pedal - removal and refitting Vacuum servo unit and master cylinder - general Antiskid system - description Electrical system .............................................................................. 15 Alternator (999 cc models) - removal and refitting Alternator (later models) - removal and refitting Alternator brushes - renewal Starter motor (999 cc models) - removal and refitting Starter motor (1301 cc Turbo ie, 1372 cc ie, 1372 cc Turbo ie) - removal and refitting Starter motor brushes (later models) - renewal Fuses - later models Relays (Turbo ie models) - general Headlamps - later models Headlamp beam adjusters for load compensation - later models Headlamp unit removal - later models Headlamp dim-dip system - description Front fog lamps bulb/unit - removal and refitting and beam adjustment Horn - relocation Steering column combination switches (later models) - removal and refitting Instrument panel (Turbo ie models) - removal and refitting Facia-mounted switches (1301 cc Turbo ie model) - removal and refitting Instrument panel (later models) - removal and refitting Auxiliary control panel (later models) - removal and refitting Heater control panel (later models) - removal and refitting Trip master Interior roof mounted spotlamp, switch and/or clock - removal and refitting Central door locking system Cigar lighter (later models) - removal and refitting Electrically operated window switches - removal and refitting Windscreen wiper motor (later models) - removal and refitting Windscreen washer reservoir (Turbo) - removal and refitting Tailgate wiper motor (later models) - removal and refitting Radio Check control system sensors - description Check control system sensors - testing Suspension ....................................................................................... 16 Front anti-roll bar - removal and refitting Suspension strut later models Bodywork .......................................................................................... 17 Plastic components Rear view mirrors Door armrest Tailgate (Turbo ie model) - component removal and refitting Radiator grille (1301 cc Turbo ie model) - removal and refitting Radiator grille (1372 cc ie and 1372 cc Turbo ie models) removal and refitting Bumpers (1301 cc Turbo ie, 1372 cc ie and 1372 cc Turbo ie models) - removal and refitting Rear hinged windows - removal and refitting Door trim panel (Turbo ie model) - removal and refitting Degrees of difficulty Easy, suitable for novice with little experience 1 Fairly easy, suitable for beginner with some experience 1 Introduction Since its introduction in 1983, the FIAT Uno has had a number of modifications and improvements including the fitting of a twin choke carburettor, low profile tyres, tinted windows and remotely-controlled central door locking. The major mechanical change was the introduction of the FIRE (Fully Integrated Robotised Engine) on 45 and 45S models to be followed by a new 1108 cc “FIRE” engine on the 60S model from 1989 on. A 1301 cc Turbo ie engine model was 2 Fairly difficult, suitable for competent DIY mechanic 3 Difficult, suitable for experienced DIY mechanic available for a short period. This model had a Bosch LE2 Jetronic electronic fuel injection (ie) and a turbocharger to give added performance. To uprate the braking to suit, disc brakes were fitted to the rear in place of the original drum type brakes. A 1372 cc engine model was introduced in 1989. Two versions were initially available. A Bosch Mono-Jetronic single-point fuel injection (SPi) system, as found on the 70 SX model and Bosch L3.1 or L3.2 Jetronic multi-point fuel injection (MPi) systems were fitted to Turbo models. L3.2 MPi system models were equipped with catalytic converters, to improve exhaust emission. All fuel injection engines are fitted with electronically controlled engine management systems. A new style instrument panel, switchgear 4 Very difficult, suitable for expert DIY or professional 5 and a revised facia layout was introduced in 1989. During 1992, SPi fuel systems were fitted to the 999 cc and 1108 cc engines, along with catalytic converters for improved exhaust emissions. Five speed transmissions were introduced to 999 cc models in 1993. It is recommended that this Supplement is always referred to before the main Chapters of the Manual. Project vehicles The vehicles used in the preparation of this supplement, and appearing in many of the photographic sequences were a 1986 Uno 45S FIRE, a 1988 1301 cc Uno Turbo ie and a 1991 1372 cc Uno SXie. 13 13•4 Supplement: Revisions and information on later models 2 Specifications Note: All Specifications are in addition or revisions of those given in the preceding Chapters. Engine General Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Application: 999 cc (FIRE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1108 cc (FIRE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1116 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1299/1301 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1372 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Bore: 999 and 1108 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1116 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1299/1301 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1372 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Stroke: 999 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1108 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1116 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1299 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1301 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1372 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Compression ratio: 999 cc: Up to mid 1988 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . From mid 1988* . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1108 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1116 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1299 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1301 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1372 cc: Non-Turbo . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Turbo . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Maximum torque (DIN): 999 cc: Up to mid 1988 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . From mid 1988* . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1108 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1116 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1299/1301 cc Turbo ie . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1372 cc ie . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1372 cc Turbo . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Maximum power (DIN): 999 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1108 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1299/1301 cc Turbo ie . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1372 cc ie . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1372 cc Turbo ie . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Compression pressure (bore wear test): All models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Maximum pressure difference between cylinders: All models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Firing order: All models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Cylinder block and crankcase material: All models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Crankshaft endfloat: All models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Cylinder head material: All models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Valve clearances: 999 and 1108 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1299, 1301 cc and 1372 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . *95 RON (unleaded fuel) engines Four-cylinder, in-line overhead camshaft. Transversely mounted with end-on transmission 45, and 45S 60S and 1.1 ie 55 and 60 70, Turbo and ie 70S, Sxie. 1.4 ie and Turbo ie 70.0 mm 80.0 mm 86.4 mm 80.5 mm 64.9 mm 72.0 mm 55.5 mm 55.4 mm 55.5 mm 67.4 mm 9.8:1 9.5:1 9.6:1 9.1:1 8.1:1 7.7:1 9.2:1 7.8:1 80 Nm at 2750 rpm 78 Nm at 2750 rpm 87 Nm at 2900 rpm 86 Nm at 3000 rpm 147 Nm at 3200 rpm 106 Nm at 3250 rpm 161 Nm at 3500 rpm 33 kW at 5250 rpm 37 kW at 5250 rpm 77 kW at 5750 rpm 54 kW at 6000 rpm 87 kW at 6000 rpm 11 ± 0.75 bars 0.96 bars 1-3-4-2 (No 1 at timing belt end) Cast-iron 0.055 to 0.265 mm Light alloy Inlet 0.25 to 0.35 mm 0.35 to 0.45 mm Exhaust 0.35 to 0.45 mm 0.45 to 0.55 mm Supplement: Revisions and information on later models 13•5 Valve timing clearance: 999 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1108 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1372 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Valve timing: 999 cc: Opens . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Closes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1108 cc: Opens . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Closes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1116 cc: Opens . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Closes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1299/1301 cc: Opens . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Closes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1299/1301 cc Turbo ie: Opens . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Closes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1372 cc ie: Opens . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Closes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1372 cc Turbo ie: Opens . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Closes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Cam lift: 999 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1108 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1116 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1299/1301 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1372 cc ie . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1372 cc Turbo ie Inlet valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Exhaust valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.0 mm 0.70 mm 0.80 mm Inlet Exhaust 1º BTDC 19º ABDC 29º BBDC 9º ATDC 2º BTDC 19º ABDC 42º BBDC 2º ATDC 7º BTDC 35º ABDC 37º BBDC 5º ATDC 9º BTDC 31º ABDC 39º BBDC 1º ATDC 0º TDC 40º ABDC 30º BBDC 10º ATDC 7º BTDC 35º ABDC 37º BBDC 5º ATDC 14º BTDC 44º ABDC 36º BBDC 6º ATDC 7.1 mm 8.0 mm 8.8 mm 8.0 mm 8.8 mm 9.5 mm 8.8 mm View of engine compartment (air cleaner removed) on the 999 cc FIRE engined model 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Wiper motor cover Suspension strut turret Brake hydraulic fluid reservoir Carburettor Washer fluid reservoir Right-hand engine mounting Fuel pump Ignition distributor Ignition coil Headlamp Oil filler cap Battery Radiator cooling fan Coolant filler/expansion tank Radiator 13 13•6 Supplement: Revisions and information on later models View of front end from below on the 999 cc FIRE engined model 1 2 3 4 5 6 7 8 9 10 View of engine compartment on the 1301 cc Turbo ie engined model 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Alternator air cooling intake Washer fluid reservoir cap Suspension strut turret Secondary fuel filter Fuel supply hose Coolant expansion tank Brake fluid reservoir cap Ignition system ECU Inlet manifold Excessive pressure switch Air cleaner Timing belt cover Fuel pressure regulator Airflow meter Throttle position switch Air intake duct Air intake to throttle valve housing Engine oil filler cap Radiator cooling fan Headlamp dim-dip transformer Intercooler air duct Ignition distributor Headlamp Main idle speed adjusting screw Base setting idle speed screw Left hand front engine mounting Transmission Track control arm Driveshaft Left hand rear (lower) engine mounting Gearchange rods Exhaust pipe Oil filter cartridge Brake caliper Sump pan drain plug Supplement: Revisions and information on later models 13•7 View of front end from below on the 1031 cc Turbo ie engined model 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Anti-roll bar Exhaust pipe Track control arm Engine centre mounting Gearchange rods Brake caliper Left-hand driveshaft Intermediate driveshaft Right-hand driveshaft Transmission Engine oil drain plug Auxiliary lamp Horn Intercooler Starter motor Oil filter cartridge Oil pressure sender unit Engine oil cooler Right-hand underwing shield Left-hand underwing shield View of engine compartment (air cleaner removed) on the 1372 cc ie engined model 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Engine oil level dipstick Timing belt cover Engine mounting (right-hand) Clutch master cylinder fluid reservoir Fuel supply and return hoses Injection unit Inlet manifold Washer reservoir Brake master cylinder and fluid reservoir Injection system fuse/relay block Suspension strut turret Ignition coil Ignition system ECU Battery Coolant filter expansion tank Ignition distributor Radiator cooling fan Engine oil filler cap Starter motor Oil filter 13 13•8 Supplement: Revisions and information on later models View of front end from below on the 1372 cc ie engine model 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Oil filter Engine oil drain plug Starter motor Horns Transmission front mounting Front fog lamp and adjuster Driveshaft Transmission rear mounting Gearchange linkage Exhaust downpipe and system joint Anti-roll bar Track control arm Tie-rod balljoint Brake unit Driveshaft damper Underwing shield Lubrication system Oil pump type: 999/1108 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1372 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Tooth tip-to-body clearance (999/1108 cc) . . . . . . . . . . . . . . . . . . . . . . Gear endfloat: 999/1108 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1372 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Oil pressure (at normal operating temperature) . . . . . . . . . . . . . . . . . . . Oil filter: 999/1108 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1372 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Torque wrench settings Auxiliary shaft sprocket bolt (1372 cc) . . . . . . . . . . . . . . . . . . . . . . . . . . Big-end cap bolts: 999/1108 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1372 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Camshaft bearing cap bolts: M8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . M6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Camshaft cover screws . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Camshaft housing to lower cylinder head securing bolt (1372 cc) . . . . . Camshaft housing to inlet manifold bracket bolt (1372 cc) . . . . . . . . . . Camshaft sprocket bolt 999/1108 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1372 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Centre mounting to final drive casing bracket (1201/1301 cc) . . . . . . . . Coolant temperature switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Crankshaft pulley bolts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Crankshaft pulley nut (1372 cc) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Crankshaft rear oil seal retainer bolts . . . . . . . . . . . . . . . . . . . . . . . . . . . Crankshaft sprocket bolt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Gear driven from front of crankshaft. Pump operated from front of crankshaft. Oil pressure relief valve in front cover. 0.080 to 0.186 mm 0.025 to 0.056 mm 0.040 to 0.106 mm 3.4 to 4.9 bars Champion F107 Champion C106 Nm 83 lbf ft 62 41 51 30 38 19 10 8 20 25 14 7 6 15 18 68 83 23 25 25 197 10 79 50 62 17 18 18 145 7 58 Supplement: Revisions and information on later models 13•9 Torque wrench settings (continued) Cylinder head bolts: 903 cc (from engine number 581470), 999 and 1108 cc: Stage 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Stage 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Stage 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1299/1301 cc (10 main bolts): Stage 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Stage 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Stage 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Stage 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1299/1301 cc (4 next to spark plug holes) . . . . . . . . . . . . . . . . . . . . . 1372 cc (M10): Stage 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Stage 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Stage 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1372 cc (M8) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Engine mounting bracket body . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Engine mounting bracket-to-body bolt (1299/1301 cc) . . . . . . . . . . . . . Engine mounting bracket-to-transmission nut (1299/1301 cc) . . . . . . . Engine mounting nuts: M10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . M8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Engine mountings to brackets (1299/1301 cc) . . . . . . . . . . . . . . . . . . . . Engine mounting to engine and transmission (999/1108 cc) . . . . . . . . . Engine mounting-to-engine bracket bolt (1299/1301 cc) . . . . . . . . . . . Flywheel bolts: 999/1108 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1372 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ignition distributor cover (in crankcase) bolt (1372 cc) * . . . . . . . . . . . . Main bearing cap bolts: 999/1108 cc: Stage 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Stage 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1372 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Manifold nuts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Mounting bracket to final drive casing (1299/1301 cc) . . . . . . . . . . . . . Oil pressure sender unit (1372 cc) * . . . . . . . . . . . . . . . . . . . . . . . . . . . . Oil pressure switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Oil pump backplate screws . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Oil pump mounting bolts: 999/1108 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1372 cc * . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Oil pump shaft driven gear bolt (1372 cc ie only) . . . . . . . . . . . . . . . . . . Oil temperature sender unit (1372 cc) * . . . . . . . . . . . . . . . . . . . . . . . . . Sump pan fixing screws . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Timing belt tensioner nut . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Turbine-to-exhaust manifold and head nut * . . . . . . . . . . . . . . . . . . . . . Water pump-to-crankcase bolt (1372 cc) * . . . . . . . . . . . . . . . . . . . . . . * Turbo models only Nm lbf ft 30 Angle tighten by another 90º Angle tighten by another 90º 22 20 40 Angle tighten by another 90º Angle tighten by another 90º 30 15 30 22 40 Angle tighten by another 90º Angle tighten by another 90º 30 25 48 85 30 22 18 35 63 57 25 23 60 85 42 18 17 44 63 43 83 25 32 62 18 40 Angle tighten by another 90º 80 27 95 37 31 7 30 59 20 70 28 23 5 10 25 83 50 10 27 29 25 7 18 61 37 7 20 21 18 Cooling system General Thermostat: Begins to open: 999/1108 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1301 cc Turbo ie . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1372 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fully open: 999/1108 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1301 cc Turbo ie . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1372 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Expansion tank pressure cap rating: 1372 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85 to 90ºC 78 to 82ºC 80 to 84ºC 100ºC 95ºC 96ºC 0.98 bar 13 13•10 Supplement: Revisions and information on later models Cooling system (continued) Radiator fan cut-in temperature: 1301 cc Turbo ie: 1st speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2nd speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1372 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Radiator fan switch-off temperature: 1301 cc Turbo ie: 1st speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2nd speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1372 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Coolant pump/alternator drivebelt tension: 1372 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Torque wrench settings Coolant pump mounting bolts (999/1108 cc) . . . . . . . . . . . . . . . . . . . . . Coolant pump to crankcase (1372 cc) . . . . . . . . . . . . . . . . . . . . . . . . . . Coolant temperature gauge sender unit (1372 cc ie) . . . . . . . . . . . . . . . Coolant temperature sender unit (1372 cc) . . . . . . . . . . . . . . . . . . . . . . Fan thermostatic switch (1372 cc) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Thermal valve on inlet manifold (1372 cc): M10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . M8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Water pump cover (1372 cc) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86 to 90ºC 90 to 94ºC 90 to 94ºC 81 to 85ºC 85 to 89ºC 85 to 89ºC Approximately 10 mm deflection midway between crankshaft and alternator pulleys under firm thumb pressure Nm 8 25 30 27 30 lbf ft 6 18 22 20 22 20 10 15 15 7 11 Fuel system General Air cleaner element 999 cc and 1108 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1372 cc ie . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1301/1372 cc Turbo ie . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fuel filter: 999 cc and 1108 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1372 cc ie . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1301/1372 cc Turbo ie . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Champion U520 Champion U533 Champion U522 Champion L101 Champion L201 Champion L203 Carburettor calibration Weber 32 Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Accelerator pump capacity (for 10 strokes) . . . . . . . . . . . . . . . . . . . . . . Air bleed jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Air compensating jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Air idle jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Anti-flooding device (choke valve plate gap) . . . . . . . . . . . . . . . . . . . . . Auxiliary venturi . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fast idle (throttle valve plate gap) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Float level (with gasket) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Full power jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Emulsion tube . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Exhaust gas CO at idle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Idle air bleed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Idle jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Idle mixture adjustment port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Idle speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Main jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Needle valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pump jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pump outlet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Venturi . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ICEV 61/250 903 cc 3.8 to 6.3 cc 1.80 mm 1.60 mm 3.5 mm 10.75 mm 0.50 mm F74 1.0 to 2.0% 0.47 mm 1.50 mm 750 to 800 rpm 1.10 mm 1.50 mm 0.40 mm 0.40 mm 22 mm TLF 4/250 999 cc 50/90 165 4.0 to 5.0 mm 0.65 to 0.75 mm 26.75 to 27.25 mm 50 F70 1.0 to 2.0% 50/90 47 750 to 800 rpm 105 1.5 mm 35 22 mm Weber 32 Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Accelerator pump capacity (for 10 strokes) . . . . . . . . . . . . . . . . . . . . . . Air bleed jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Air idle jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Auxiliary venturi . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Emulsion tube . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TLF 4/252 (and 251) 999 cc 8 to 12 cc 1.65 mm 0.50 mm 4.5 mm F70 TLF 27/251 1108 cc 8 to 12 cc 1.65 mm 0.50 mm 4.5 mm F70 Supplement: Revisions and information on later models 13•11 Weber 32 (continued) Exhaust gas CO at idle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fast idle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Float level (with gasket) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Float travel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Full power jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Idle jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Idle mixture adjustment port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Idle speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Main jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Needle valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pump jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pump outlet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Superfeed jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Superfeed mixture jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Venturi . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Weber 30/32 DMTE 30/150 Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Exhaust gas CO at idle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Float level (with gasket fitted) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Idle pull-down . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Idle speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Needle valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pull down capsule bush . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Air correction jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Emulsion tube . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Idle air jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Idle jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Idle jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Full power jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Main jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Main venturi . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pump discharge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pump jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Secondary venturi . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Weber 30/32 DMTE 10/150 Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Accelerator pump capacity (ten strokes) . . . . . . . . . . . . . . . . . . . . . . . . Anti-flooding device (automatic - Y) . . . . . . . . . . . . . . . . . . . . . . . . . . . . Anti-flooding device (mechanical - X) . . . . . . . . . . . . . . . . . . . . . . . . . . . Excess fuel discharge orifice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Exhaust gas CO at idle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Float setting (fuel level) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Idle speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Needle valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Primary and secondary valve plate openings: X .................................................... Y .................................................... Primary valve plate opening (X) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Throttle valve plate opening - fast idle (A) . . . . . . . . . . . . . . . . . . . . . . . TLF 4/252 (and 251) 1.0 to 2.0% 0.65 to 0.75 mm 26.75 to 27.25 mm 33.7 to 34.7 mm 0.50 mm 0.47 mm 1.50 mm 750 to 800 rpm 1.05 mm 1.50 mm 0.40 mm 0.40 mm 0.40 mm 3.00 mm 22 mm TLF 27/251 0.5 to 1.5% 26.75 to 27.25 mm 33.7 to 34.7 mm 0.55 mm 0.45 mm 1.50 mm 800 to 850 rpm 1.05 mm 1.50 mm 0.40 mm 0.40 mm 0.45 mm 3.00 mm 22 mm 1116 cc engine (95 RON unleaded engine) 1.0 to 2.0% 6.5 to 7.5 mm 3.0 to 3.5 mm 800 to 900 rpm 1.50 mm 0.20 mm Primary Secondary 2.10 1.80 F30 F30 1.15 0.70 1.50 0.47 0.40 0.40 0.90 1.05 19 23 0.40 0.45 4.5 1116 cc 8.5 to 12.5 cc 3.75 to 4.25 mm 8.0 to 9.5 mm 0.40 0.5 to 1.5% 6.5 to 7.5 mm 800 to 900 rpm 1.5 mm 13.5 to 14.5 mm 14.5 to 15.5 mm 6.45 to 6.95 mm 0.90 to 0.95 mm Primary 195 40 3.5 F42 47 90 19.0 mm Air correction jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Accelerator pump jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Auxiliary venturi . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Emulsion tube . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Idle jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Main jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Venturi diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Solex C 30/32 - CIC8 Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1116 cc All calibration as for the Weber 30/32 DMTE 10/150 except for the following: Primary Accelerator pump jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 Air correction jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 230 Idle jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47.5 Main jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 Needle valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.6 Secondary 195 40 5 F38 70 95 23.0 mm 13 Secondary 50 190 40 100 1.6 13•12 Supplement: Revisions and information on later models Weber 30/32 DMTE 12/150 Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1299/1301 cc All calibration as for the Weber 30/32 DMTE 10/150 except for the following: Primary Accelerator pump jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 Air correction jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.20 Idle jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 Main jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.90 Secondary 45 1.75 70 0.97 Fuel injection systems System type: 999/1108 cc ie (from 1992) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1301 Turbo ie . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1372 cc ie . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1372 cc Turbo ie (up to 1992) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1372 cc Turbo ie (from 1992) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fuel pump: All fuel injection models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fuel pressure: 999/1108/1372 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1301 cc Turbo ie . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1372 cc Turbo ie . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fuel octane rating: Without catalyst . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . With catalyst . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Idle speed: 999/1108 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1301 cc Turbo ie . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1372 cc ie . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1372 cc Turbo ie . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Exhaust gas CO at idle: 999/1108 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1301 cc Turbo ie . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1372 cc Turbo ie . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Torque wrench settings Coolant pipe bolt to turbocharger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Coolant pipe union nut to turbocharger . . . . . . . . . . . . . . . . . . . . . . . . . Exhaust bracket nuts and bolts (999/1108 cc) . . . . . . . . . . . . . . . . . . . . Exhaust manifold flange nut (1372 cc models) . . . . . . . . . . . . . . . . . . . . Exhaust manifold to crankcase bracket (1372 cc) . . . . . . . . . . . . . . . . . Exhaust manifold to cylinder head (1372 cc) . . . . . . . . . . . . . . . . . . . . . Exhaust pipe flange-to-manifold nuts (999/1108 cc) . . . . . . . . . . . . . . . Fuel pump mounting bolts (999/1108 cc) . . . . . . . . . . . . . . . . . . . . . . . . Fuel pump unions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fuel pressure regulator nut . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Inlet and exhaust manifold to cylinder head nuts (999/1108 cc) . . . . . . Rear exhaust pipe/silencer mounting bracket nut . . . . . . . . . . . . . . . . . Turbocharger-to-exhaust manifold-and-cylinder head nut . . . . . . . . . . Bosch Mono-Jetronic SPi with catalyst Bosch LE2 Jetronic MPi Bosch Mono-Jetronic SPi Bosch L3.1 Jetronic MPi Bosch L3.2 Jetronic MPi with catalyst Electric 0.8 to 1.10 bars 1.6 bars 6.0 bars maximum 98 RON minimum (unleaded or leaded) 95 RON minimum (unleaded only) 850 ± 50 rpm 850 ± 50 rpm 850 ± 50 rpm 825 ± 25 rpm 0 to 0.35% 0.5 to 1.5% 1.2 to 1.8% Nm 25 38 23 18 25 25 18 8 15 48 27 24 28 lbf ft 18 28 17 13 18 18 13 6 11 35 20 18 21 Ignition system “Breakerless” (999, 1108, 1116, 1299/1301 cc) General System type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Spark plug type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Spark plug electrode gap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HT lead type (999 and 1108 cc) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Component testing values Magnetic impulse generator resistance: Models with Marelli distributors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Models with the Ducellier distributor . . . . . . . . . . . . . . . . . . . . . . . . . Ignition coil resistance at 20ºC (68ºF): Models with BA506A coil: Primary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Secondary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Models with BA506D coil: Primary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Secondary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Magnetic impulse generator electronic Champion RC9YCC or RC9YC 0.8 mm Champion LS-20 758 to 872 ohms 171 to 209 ohms 0.756 to 0.924 ohms 3330 to 4070 ohms 0.666 to 0.814 ohms 2970 to 3630 ohms Supplement: Revisions and information on later models 13•13 Ignition timing (in relation to distributor type) At idle with vacuum hose disconnected and plugged: Marelli SE101A and Ducellier 525473A . . . . . . . . . . . . . . . . . . . . . . . Marelli SE100EX, SE100CX and SE100NX . . . . . . . . . . . . . . . . . . . . . Marelli SE101G . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Marelli SE100SX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Centrifugal advance (maximum): Marelli SE101A and Ducellier 525473A . . . . . . . . . . . . . . . . . . . . . . . Marelli SE100EX and SE100CX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Marelli SE100NX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Marelli SE101G . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Marelli SE100SX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Vacuum advance (maximum): Marelli SE101A, Ducellier 525473A and Marelli SE101G . . . . . . . . . . Marelli SE100NX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Marelli SE100EX and SE100CX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Marelli SE100SX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2º BTDC 10º BTDC 3º BTDC Not available 26 to 30º BTDC 22 to 26º BTDC 18 to 22º BTDC 23 to 27º BTDC 20 to 24º BTDC 12 to 14º BTDC 14 to 16º BTDC 10 to 14º BTDC 13 to 17º BTDC Digiplex 2 (1372 cc ie) General System type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Spark plug type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Spark plug electrode gap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ignition timing At 800 to 850 rpm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Maximum advance (at 4500 to 6200 rpm with 0.6 bar/8.7 lbf/in2 vacuum) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Component testing values Ignition coil: Primary resistance at 23ºC (73ºF) . . . . . . . . . . . . . . . . . . . . . . . . . . . . Secondary resistance at 23ºC (73ºF) . . . . . . . . . . . . . . . . . . . . . . . . . Engine speed/TDC sensor: Resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Sensor-to-flywheel tooth gap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Marelli Digiplex 2 electronic Champion RN9YCC or RN9YC 0.8 mm 2 to 6º BTDC 44 to 48º BTDC 0.405 to 0.495 ohms 4320 to 5280 ohms 680 to 920 ohms 0.2 to 0.8 mm Microplex (1301 cc Turbo ie) General System type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Spark plug type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Spark plug electrode gap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Rotor arm resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ignition timing At idle with vacuum hose detached: Up to mid 1988 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . From mid 1988 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Maximum advance: Up to mid 1988 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . From mid 1988 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Component testing values Ignition coil: Primary winding resistance at 20ºC (68ºF) . . . . . . . . . . . . . . . . . . . . . Secondary winding resistance at 20ºC (68ºF) . . . . . . . . . . . . . . . . . . Engine speed sensor: Resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Sensor-to-flywheel tooth gap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TDC sensor: Resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Sensor-to-crankshaft pulley tooth gap . . . . . . . . . . . . . . . . . . . . . . . . Marelli Microplex electronic Champion RC7YCC or RC7YC 0.8 mm 800 to 1200 ohms 8 to 12º BTDC 8.5 to 11.5º BTDC 36 to 40º BTDC 32.5 to 35.5 BTDC 0.31 to 0.37 ohms 3330 to 4070 ohms 612 to 748 ohms 0.25 to 1.3 mm 612 to 748 ohms 0.4 to 1.0 mm Microplex (1372 cc Turbo ie) General System type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Spark plug type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Spark plug electrode gap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Marelli Microplex electronic ignition Champion RC7BYC4 0.9 mm 13 13•14 Supplement: Revisions and information on later models Ignition timing At idle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Maximum advance (at 4000 to 6000 rpm with 0.377 bars/5.5 lbf/in2 vacuum) . . . . . . . . . . . . . . . . . . . . . . . . . . . . Component testing values Ignition coil: Primary resistance at 20ºC (68ºF) . . . . . . . . . . . . . . . . . . . . . . . . . . . . Secondary resistance at 20ºC (68ºF) . . . . . . . . . . . . . . . . . . . . . . . . . Engine speed sensor: Resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Sensor to flywheel teeth clearance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TDC sensor: Resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Sensor to crankshaft pulley tooth gap . . . . . . . . . . . . . . . . . . . . . . . . 8º to 12º BTDC 32º to 36º BTDC 0.40 to 0.49 ohms 4320 to 5280 ohms 612 to 748 ohms 0.25 to 1.3 mm 612 to 748 ohms 0.4 to 1.0 mm Clutch Pedal height All later models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136 to 146 mm Driven plate diameter 903, 999 and 1301 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1108 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1372 cc ie . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1372 cc Turbo ie . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 170 mm 180 mm 181.5 mm 200 mm Transmission General Type number: 903, 999,1108 and 1372 cc ie . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 999 and 1108 (from 1992) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1372 cc, Turbo ie . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C.501.5.10 C.514 C.510.5.17 Final drive ratios 903 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 999 and 1108 cc (except C514 type transmission) . . . . . . . . . . . . . . . . 999 cc (with C514 type transmission) . . . . . . . . . . . . . . . . . . . . . . . . . . 1108 cc (with C514 type transmission) . . . . . . . . . . . . . . . . . . . . . . . . . 1301 cc Turbo ie (without Antiskid) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1301 cc Turbo ie (with Antiskid) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1372 cc Turbo ie . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.071:1 3.733:1 3.866:1 3.733:1 3.588:1 3.562:1 3.353:1 Oil type/specification: 1372 cc Turbo ie . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fiat ZC 80/S gear oil Driveshafts Roadwheels Turbo ie . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 1/2 J x 13 Tyres Turbo ie Size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pressures: Front and rear, normal load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Front, full load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Rear, full load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Spare wheel tyre size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Spare wheel tyre pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1372 cc ie with catalyst (1.4 ie S) Size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pressures: Front . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Rear - normal load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Rear - full load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175/60 HR 13 2.2 bars 2.3 bars 2.5 bars 5.50B x 13 FH 2.2 bars 155/70 SR 13 2.0 bars 1.9 bars 2.2 bars Supplement: Revisions and information on later models 13•15 Torque wrench settings Driveshaft flange connecting bolts (Turbo ie) . . . . . . . . . . . . . . . . . . . . . Final drive output shaft bearing cover bolts (Turbo ie) . . . . . . . . . . . . . . Intermediate shaft support to crankcase (Turbo ie) . . . . . . . . . . . . . . . . Nm 43 24 48 lbf ft 32 18 35 Braking system (903, 999, 1108, 1116 and 1372 cc) General Note: The following items differ, or are additional to those specified in Chapter 8: Master cylinder bore diameter: 903 cc, 999 cc, 1108 cc and 1116 cc . . . . . . . . . . . . . . . . . . . . . . . . . 19.05 mm 1372 cc ie . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20.65 mm Vacuum servo diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152.4 mm Hydraulic push rod-to-master cylinder support plate clearance . . . . . . 0.825 to 1.025 mm Braking system (1301 and 1372 cc Turbo ie) General System type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Master cylinder bore diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Vacuum servo diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Four-wheel discs, ventilated front, solid rear. Vacuum servo. Pressure regulating valve on rear brakes 22.225 mm 177.8 mm Front disc brakes Disc diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Disc thickness - new . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Disc thickness - minimum (refinishing) . . . . . . . . . . . . . . . . . . . . . . . . . . Disc thickness - minimum (wear limit) . . . . . . . . . . . . . . . . . . . . . . . . . . Minimum thickness of pad friction material . . . . . . . . . . . . . . . . . . . . . . Caliper cylinder diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 240.0 mm 19.9 to 20.1 mm 18.6 mm 18.2 mm 1.5 mm 48.0 mm Rear disc brakes Disc diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Disc thickness - new . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Disc thickness minimum (refinishing): 1301 cc Turbo ie . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1372 cc Turbo ie . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Disc thickness - minimum (wear limit) . . . . . . . . . . . . . . . . . . . . . . . . . . Minimum thickness of pad friction material . . . . . . . . . . . . . . . . . . . . . . Caliper cylinder diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Torque wrench settings Front caliper cylinder housing mounting bolts . . . . . . . . . . . . . . . . . . . . Front caliper support bracket bolts . . . . . . . . . . . . . . . . . . . . . . . . . . . . Front disc fixing bolts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Rear caliper support bracket bolts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Rear caliper cylinder housing mounting bolts . . . . . . . . . . . . . . . . . . . . 227.0 mm 10.7 to 10.9 mm 9.7 mm 9.35 mm 9.0 mm 1.5 mm 34.0 mm Nm 52 52 25 25 52 lbf ft 38 38 18 18 38 Electrical system Battery Turbo ie engine models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 Ah Fuses (903, 999, 1116, 1299/1301 and 1301 cc Turbo ie) Fuse No. 1 2 Rating 7.5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 4 5 6 10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 8 9 10 10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 12 13 14 20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - .............................................. 10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Circuit LH tail, RH front parking, rear number plate, check panel RH tail, LH front parking, cigar lighting, clock light, heater control illumination, map reading lamp. RH headlamp main beam LH headlamp main beam and warning light Radiator cooling fan, econometer and horns Cigar lighter, courtesy lamps, digital clock, stop-lamp switch, clock and radio RH headlamp dipped beam LH headlamp dipped beam, rear fog warning lamp and indicator Heated rear screen and warning lamp Instrument panel, stop-lamps, direction indicators, reversing lamps and warning module Heater fan, fan control illumination and digital clock Windscreen wiper, washer pump and rear screen wiper Spare Hazard warning lamps and indicator 13 13•16 Supplement: Revisions and information on later models Fuses (903, 999, 1116, 1299/1301 and 1301 cc Turbo ie) (continued) Fuse No. Rating Supplementary fuses at side of main fuse block: A 20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B 30 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C 10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D 30 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E 10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Circuit Front fog lamps Cooling fan (Turbo ie models) Fuel injector cooling fan (Turbo ie models) Electric windows Fuel pump (Turbo ie models) Fuses (later 903, 999, 1108, 1372 ie and 1372 cc Turbo ie) Fuse 1 2 Rating 7.5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 4 5 6 10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 8 9 10 11 10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Supplementary fuses at side of main fuse block: A 30 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B 25 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C 10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D 20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E 20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F - .............................................. G 10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Supplementary fuses on steering column relay bracket: 10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Circuit LH tail, RH front parking, rear number plate lamps and check panel RH tail, LH front parking, cigar lighter illumination, clock light, heater control illumination and map reading light RH headlamp main beam LH headlamp main beam and warning light Radiator cooling fan (except Turbo ie models) and horn Cigar lighter, courtesy lamps, digital clock, stop-lamp switch, clock and radio RH headlamp dipped beam LH headlamp dipped beam Rear fog lamp and warning lamp Heated rear screen and warning lamp Instrument panel, stop-lamps, direction indicators, reversing lamps, warning module and carburettor cut-off (FIRE models only) Heater fan, heater/ventilation control illumination lights and digital clock light Windscreen wiper, windscreen washer pump and rear wiper/washer (where fitted) Horns and relay Hazard warning light and indicator light Electric windows Central locking (where fitted) Injector cooling fan (where fitted) Headlamp washers (where fitted) Foglamp and warning lamp Spare Fuel pump (fuel injection models) Heated Lambda sensor Antiskid monitor circuit (where fitted) Antiskid supply circuit (where fitted) Steering and suspension General 1301 cc Turbo ie Castor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Number of turns of steering wheel, lock-to-lock . . . . . . . . . . . . . . . . . . 1º 55’ to 2º 35’ positive 3.42 Later models Steering angles: Camber . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Castor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Toe-in . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -30’ ± 30’ 2º10’ ± 15’ 0 to 2.0 mm 1301/1372 cc Turbo ie Steering angles of roadwheels: Inner wheel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Outer wheel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36º 43’ 31º 27’ Torque wrench settings Anti-roll bar clamp bolts (1301 and 1372 cc Turbo ie) . . . . . . . . . . . . . . Anti-roll bar end fixing nuts (1301 and 1372 cc Turbo ie) . . . . . . . . . . . Nm 25 15 lbf ft 18 11 Supplement: Revisions and information on later models 13•17 General dimensions, weights and capacities Dimensions Overall length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Overall width: Base and Super models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SX and Turbo models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Height (unladen): 1372 cc (except Turbo) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1299/1301 cc (except Turbo) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Turbo . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . All other models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3689 mm 1558 mm 1562 mm 1425 mm 1420 mm 1405 mm 1415 mm Weights (kerb) Note: 3-door model weights are given. Add 15 kg to the following for 5-door models. Weight will also vary according to the model version. 903 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 740 kg 999 cc (45, 45 S and 45 SX) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 740 to 775 kg 1108 cc (60 S and 60 SX) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 760 to 795 kg 1299/1301 cc (70 SX) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 770 kg 1301 cc Turbo ie . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 845 kg 1372 cc (1.4 ie S catalyst) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 830 kg 1372 cc ie (70 SX) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 795 to 845 kg 1732 cc Turbo ie . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 925 kg Capacities Fuel tank: 1372 cc Turbo ie . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . All other models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Engine oil (with filter change): 903, 999 and 1108 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1116, 1299/1301 and 1372 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Transmission: 1301 cc Turbo ie . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1372 cc Turbo ie . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . All other engines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Cooling system: 903, 999 and 1108 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1116 and 1299/1301 cc, non-catalyst 1372 cc ie . . . . . . . . . . . . . . . 1372 cc ie with catalyst . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1301 cc Turbo ie . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1372 cc Turbo ie . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 litres 42 litres 3.8 litres 4.1 litres 2.9 litres 2.0 litres 2.4 litres 4.6 litres 6.2 litres 6.5 litres 6.9 litres 7.7 litres 13 13•18 Supplement: Revisions and information on later models 3 Routine maintenance - all models from June 1991 The maintenance intervals in this manual are provided with the assumption that you, not the dealer, will be carrying out the work. These are the minimum maintenance intervals recommended by us, for vehicles driven daily. If you wish to keep your vehicle in peak condition at all times, you may wish to perform some of these procedures more often. We encourage frequent maintenance, since it enhances the efficiency, performance and resale value of your vehicle. If the vehicle is driven in dusty areas, used to tow a trailer, or driven frequently at slow speeds (idling in traffic) or on short journeys, more frequent maintenance intervals are recommended. When the vehicle is new, it should be serviced by an authorised dealer to preserve the factory warranty. Every 250 miles (400 km), weekly or before a long journey m Proceed as described for the earlier models at the start of this manual Every 6000 miles (10 000 km) or 12 months (whichever comes first) m Renew the engine oil and oil filter (Turbo models only) Every 9000 miles (15 000 km) or 12 months (whichever comes first) m Check the tyre pressures and their condition (including the spare) m Where a pad wear warning light is fitted, check its operation m Check the front brake disc pads for excessive wear m Check the underbody condition (fuel and brakes pipes, exhaust system, hoses, bushes and gaiters) m Check the condition and tension of drivebelts m Check the engine idle speed and CO emissions m Check the EGR system (If fitted) m Check fluid levels (coolant, brake fluid and windscreen washer) m Renew spark plugs (1372 cc Turbo models) m Renew the engine oil and oil filter (non-Turbo models) m Check the HT leads and connections m Check the condition of all coolant, fuel and hydraulic hoses and connections Every 18 000 miles (30 000 km) or 24 months (whichever comes first) In addition to the items listed for 9000 mile (15 000 km) or 12 months service m Check the rear brake disc pads for wear (where applicable) m Check/adjust the valve clearances m Check and tighten (if necessary), inlet and exhaust manifolds m Check the clutch adjustment (cable operated models) m Renew the fuel filter (where applicable) m Renew the air cleaner element m Renew the spark plugs and check the HT leads and connections (all models) m Where applicable, have the ignition and injection systems checked (special equipment needed) m Renew coolant m Renew brake fluid Every 28 000 miles (45 000 km) or 36 months (whichever comes first) In addition to the items listed for 9000 mile (15 000 km) or 12 months service m Check Lambda (oxygen) sensors operation (special equipment needed) m Check fuel evaporation system (where fitted) m Check the transmission oil level m Check the condition crankcase ventilation system Every 37 000 miles (60 000 km) or 48 months (whichever comes first) In addition to the items listed for 18 000 mile (30 000 km) or 24 months service m Check the condition of the rear brake shoe linings m Check the condition of the timing belt Every 65 000 miles (105 000 km) m Renew the timing belt Every 74 500 miles (120 000 km) m Renew the manual transmission oil Supplement: Revisions and information on later models 13•19 Fig. 13.1 Correct method of fitting sump pan sealing strip (Sec 4) 4 Engine 903 and 1299/1301 cc Sump pan sealing strips (903 cc engine) - modification 1 The design of the sealing strips which go between the sump pan and the main bearing caps has been changed. Make sure that the narrower side of the strip fits into the channel in the sump pan. 1299 cc engine - description 2 In April 1984, a 1299 cc engine was introduced, progressively replacing the 1301 cc units used previously. The new engine is identical to the 1301 cc engine described in Chapter 1, with the exception of having a slightly shorter stroke. 3 However, as of approximately September 1987, the 1299 cc unit was phased out, being progressively replaced by the 1301 cc engine used initially. 4 As mentioned above, the two engines are all but identical, so identification of the unit fitted should not be necessary in practice. Consult a FIAT dealer if in doubt. Rocker cover (903 cc engine) removal 5 Before removing the rocker cover, it will be necessary to remove the distributor, first. Refer to Chapter 4 for more details. Cylinder head (903 cc engine) refitting 6 Modified cylinder head bolts are fitted to 903 cc models, from engine number 8581470. When refitting the cylinder head, tighten each head bolt, as described in Chapter 1, by the torques and angles shown the Specifications in this Chapter. Fig. 13.2 Cross-section view of the 999 and 1108 cc engine (Sec 5A) 5 Engine 999 and 1108 cc (FIRE) Note: Later models are fitted with SPi fuel injection. Where a procedure refers to a carburettor, if applicable, replace with throttle body. PART A: GENERAL Description 1 Both of these engine types are designated FIRE (Fully Integrated Robotised Engine), being largely manufactured and assembled by computer-controlled mechanical robots. 2 The engine is of oversquare design, having four cylinders and a belt-driven overhead camshaft. 3 The high torque of this engine enables higher gear ratios to be used with the result that fuel economy is exceptionally good. 4 The cylinder head is of light alloy, while the cylinder block is cast-iron. 5 The camshaft is supported in three bearings which have detachable caps. 6 Valve clearances are maintained by shims located in the cam followers (tappets). 7 The cylinder head is of crossflow type having the intake manifold (coolant-heated) and exhaust manifold on opposite sides. 8 The pistons have two compression rings and one oil control ring and are connected to the connecting rods by means of a gudgeon pin which is an interference fit in the rod small-end. 9 The crankshaft is supported in five main bearings. The upper section of the centre bearing shell retains semi-circular thrust washers to control crankshaft endfloat. 10 The oil pump, which is of gear type, is 13 13•20 Supplement: Revisions and information on later models Fig. 13.3 Longitudinal sectional view of the 999 and 1108 cc engine (Sec 5A) mounted on the front end of the crankshaft and driven by it. 11 The flexible toothed timing belt drives the Fig. 13.4 999 and 1008 cc engine lubrication system (Sec 5A) camshaft and the coolant pump from a sprocket on the front end of the crankshaft. The belt is tensioned by an eccentrically-mounted pulley. 12 The distributor and the fuel pump (carburettor models) are driven from the flywheel end of the camshaft. The fuel pump on fuel injection models is an integral unit combined with the fuel gauge sender unit and immersed in the fuel tank. part numbers for the FlRE engine 1860443000 and 1887001000 (photos). 2 Remember that the clearance for inlet and exhaust valves differs see Specifications at the beginning of this Supplement. 3 Counting from the timing cover end of the engine, the valve sequence is as follows. Inlet 2-4-5-7 Exhaust 1-3-6-8 PART B: OPERATIONS POSSIBLE WITH ENGINE IN CAR 5B.1A Checking a valve clearance 1 The operations are similar to those described in Chapter 1, Section 26, but note that the special tools referred to have different 4 Remove the air cleaner. 5 Slacken and remove the alternator drivebelt, then remove the spark plugs. 6 Unbolt and remove the timing belt cover. Note the bolt located at the bottom of the cover, this can be easily overlooked (photo). 7 Unbolt and remove the crankshaft pulley (photo). 5B.1B Using a modified C-spanner and screwdriver to remove a shim 5B.6 Timing cover lower fixing bolt removal 5B.7 Unscrewing the crankshaft pulley bolts Valve clearances - adjustment Timing belt - renewal # Supplement: Revisions and information on later models 13•21 5B.8A Camshaft sprocket timing mark and cylinder head timing mark in alignment 5B.8B Crankshaft sprocket timing mark and oil pump cover alignment mark (arrowed) 5B.9 Releasing the timing belt tensioner nut 8 Turn the crankshaft sprocket bolt, or engage top gear and raise and turn a front roadwheel, until the camshaft sprocket TDC timing mark is aligned with the mark on the cylinder head and the crankshaft sprocket timing mark is aligned with the mark on the oil pump cover (photos). 9 Release the nut on the timing belt tensioner, move the pulley away from the belt and retighten the nut to hold the pulley in the retracted position (photo). 10 Slide the drivebelt from the sprockets. 11 When refitting the new belt, make sure that the sprocket timing marks are still in alignment and fit the belt so that the arrows on the belt point in the direction of engine rotation, and the lines of the belt coincide with the sprocket marks. 12 Engage the timing belt with the crankshaft sprocket first, then place it around the coolant pump sprocket and the camshaft sprocket (photo). Finally slip the belt around the tensioner pulley. 13 Release the tensioner nut and push the pulley against the belt until the belt is quite taut. Check that the sprocket timing marks have not moved out of alignment. If they have, reset them by moving them over the belt teeth. 14 Still applying force to the pulley, tighten its nut. 15 Turn the crankshaft through two complete turns in the normal direction of rotation and check that when the centre of the longest run of the belt is gripped between finger and thumb it can just be twisted through 90º. If increased tension is required to achieve this, release the tensioner nut and prise the pulley against the timing belt. Note: The above procedure serves only as a rough guide to setting the belt tension having it checked by a FIAT dealer at the earliest opportunity is recommended. 16 Refit the timing belt cover, the crankshaft pulley, alternator drivebelt, spark plugs and the air cleaner. Warning: Refer to the beginning of Section 9 before starting any work. 17 Remove the air cleaner and the fuel pump (carb. models), as described in Section 9 of this Supplement. 18 Remove the distributor (Section 10). 19 Remove the timing belt cover. 20 Unbolt and remove the camshaft cover, having first disconnected the HT lead clip (photos). 21 Turn the crankshaft (by engaging top gear and raising and turning a front roadwheel) until No. 4 piston is at TDC. The timing mark on the camshaft sprocket will be in alignment with the mark on the cylinder head. 22 Pass a rod through one of the holes in the camshaft sprocket to prevent it rotating and then unscrew the sprocket fixing bolt. Slip the sprocket from the camshaft and out of the loop of the belt (photos). 23 Mark the camshaft bearing caps as to position and then unbolt and remove the 5B.12 Fitting the timing belt 5B.20A Camshaft cover HT lead clip Camshaft removal and refitting # 13 5B.20B Removing the camshaft cover 5B.22A Unscrewing the camshaft sprocket bolt 5B.22B Camshaft sprocket bolt and washer 13•22 Supplement: Revisions and information on later models 5B.22C Camshaft sprocket showing integral key (arrowed) 5B.23C Camshaft lubrication pipe 5B.23A Prising out the camshaft oil feed pipe stub 5B.23D Camshaft bearing cap showing short and long positioning dowels for correct fitting 5B.23B Unscrewing the camshaft bearing/banjo union bolt lubrication pipe (prise the oil feed stub out with a screwdriver), unscrew the remaining bolts and take off the bearing caps (photos). 24 Lift the camshaft carefully from the cylinder head, checking that the valve clearance shims and cam followers are not withdrawn by the adhesion of the oil (photo). 25 If the shims and cam followers are to be removed, keep them in their originally fitted order (photos). 26 Refitting is a reversal of removal but use a new camshaft oil seal and camshaft cover gasket. Oil the camshaft bearings (photos). 27 Make sure that the timing belt is reconnected and tensioned as described previously. 28 Check the valve clearances. 29 Tighten all nuts and bolts to the specified torque. Cylinder head removal and refitting # 5B.24 Removing the camshaft 2B.25A Valve clearance shim showing thickness mark Warning: Refer to the beginning of Section 9 before starting any work. Note: The cylinder head should be removed cold. 30 Drain the cooling system. 31 Remove the air cleaner. 32 Disconnect the throttle and choke connections from the carburettor (photo). 33 On carburettor models, disconnect the fuel hoses from the fuel pump and the carburettor. On fuel injection models, 5B.25B Removing a cam follower (tappet) with shim 5B.26A Camshaft oil seal 5B.26B Camshaft cover gasket Supplement: Revisions and information on later models 13•23 5B.32 Disconnecting the throttle cable 5B.34 Inlet manifold coolant hose (A) and brake servo vacuum hose (B) depressurize the fuel system, before disconnecting the fuel pipes and removing the throttle body, as described in Section 9D. 34 Disconnect the coolant and vacuum hoses from the cylinder head and inlet manifold (photo). 35 Disconnect the electrical lead from the coolant temperature switch, the LT leads from the distributor and the idle cut-off solenoid lead. 36 Remove the distributor cap, disconnect the plug leads and place the cap and leads to one side of the engine compartment. 37 Unbolt and remove the timing belt cover. 38 Set No. 4 piston to TDC and then release the timing belt tensioner and slip the belt from the camshaft and coolant pump sprockets. 39 Unbolt and remove the inlet manifold, complete with carburettor, or throttle body as applicable. 40 Unbolt the exhaust manifold from the cylinder head and tie it to one side of the engine compartment; the downpipe bracket will have to be disconnected. 41 Unscrew the cylinder head bolts, a half turn at a time in the reverse order to that shown in Fig. 1.30 of Chapter 1. When the bolts are free, remove them with their washers. 42 Lift the cylinder head from the block. If it is stuck tight, insert pieces of wood into the exhaust or inlet ports and use them as levers to “rock” the head off the block. On no account drive levers into the gasket joint or attempt to tap the head sideways as it is located on positioning dowels. 43 Remove and discard the cylinder head gasket and both manifold gaskets. 44 The cylinder head can be dismantled after removing the camshaft and cam followers as described in the preceding sub-Section. 45 Further dismantling and decarbonising are described in Chapter 1, Section 39. Note that single valve springs are used. 46 If the valves have been ground in, the valve clearances will require adjusting, as described previously. This should be done before the cylinder head is refitted to the engine. 47 Before refitting the assembled cylinder head, make sure that the head and block mating surfaces are perfectly clean, and that the block bolt holes have been cleared of any oil. 48 The camshaft sprocket timing mark must be aligned with the one on the cylinder head. 49 The new gasket should not be removed from its nylon cover until required for use. Fit the gasket dry to perfectly clean surfaces. 50 Place the gasket on the cylinder block so that the word ALTO can be read from above (photos). 51 Lower the cylinder head onto the block so that it locates on the positioning dowels (photo). 52 The cylinder head bolts must have clean threads, dipped in engine oil and allowed to drain for thirty minutes. Screw the bolts in 5B.50A Cylinder head gasket 5B.50B Cylinder head gasket top surface marking finger-tight and then tighten them in the sequence shown in Fig. 1.30 of Chapter 1, and in the stages specified (see Specification) (photos). 53 Refit the inlet manifold and carburettor using a new gasket. 54 Reconnect the exhaust manifold using a new gasket. Tighten all nuts to the specified torque. Reconnect the exhaust downpipe bracket. 55 Reconnect the timing belt and tension it as described earlier. 56 Refit the timing belt cover and the distributor cap and camshaft cover. 57 Reconnect all hoses, electrical leads and controls. 58 Fit the air cleaner. 59 Fill and bleed the cooling system. 13 5B.51 Fitting the cylinder head 5B.52A Inserting a cylinder head bolt 5B.52B Typical disc for angular tightening of cylinder head bolts 13•24 Supplement: Revisions and information on later models 5B.61 Removing the flywheel housing cover plate Sump pan removal and refitting ¡ 60 Drain the engine oil. 61 Unbolt and remove the cover plate from the lower part of the flywheel housing (photo). The two lower bolts retain the gearchange rod support strut. 62 Unscrew the sump pan securing screws and pull the sump pan downwards to remove it (photo). The joint sealant will require cutting with a sharp knife to release the pan. Clean away all old gasket material. 63 A bead 3.0 mm in diameter of RTV silicone instant gasket should be applied to the sump pan flange and then the pan offered up. Screw in the fixing screws and tighten to the specified torque. Note the flange end fixing screw nuts (photos). 5B.62 Removing the sump pan 5B.63A Tightening a sump pan screw 64 Wait one hour before filling with engine oil. 65 Refit the flywheel housing cover plate. 71 Extract the oil pump fixing bolts and withdraw the pump. 72 The oil pump incorporates a pressure relief valve which can be removed for examination by depressing the spring plunger and pulling out the keeper plate (photos). 73 If pump wear is suspected, check the gears in the following way. Extract the fixing screws and remove the rear cover plate. The screws are very tight and will probably require the use of an impact driver to release them (photo). 74 Check the clearance between the outer gear and the pump housing using feeler blades, and also the gear endfloat by placing a straight-edge across the pump body and checking the gap between the straight-edge and gear face. If the clearances are outside the specified tolerance, renew the oil pump complete (photos). Oil pump - removal, checking and refitting # 66 Drain the engine oil and remove the sump pan as described in the last sub-Section. Unscrew and remove the oil filter cartridge. 67 Remove the timing belt. 68 Lock the crankshaft against rotation either by placing a block of wood between a crankshaft web and the inside of the crankcase or by jamming the flywheel starter ring gear with a suitable tool. 69 Unscrew and remove the crankshaft sprocket bolt and take off the timing belt sprocket. If it is tight, use two screwdrivers to lever it off or use a two- or three-legged puller. 70 Unbolt and remove the oil pick-up/filter screen assembly. Note the sealing washer. 5B.63B Sump pan flange end fixing screw and nut 5B.72A Removing the oil pump relief valve keeper plate 5B.72B Oil pump relief valve components 5B.73 Removing the oil pump rear cover plate screws 5B.74A Checking the oil pump gear-tohousing clearance 5B.74B Checking the oil pump gear endfloat Supplement: Revisions and information on later models 13•25 5B.77A Removing the oil pump seal 5B.77B Using a socket to fit the new oil pump oil seal 5B.78 Fitting the oil pump 75 If the pump is unworn, refit the rear cover plate and tighten the screws fully. 76 Apply air pressure from a tyre pump to the oil pump oil ducts to clear any sludge or other material and then prime the pump by pouring clean engine oil into its intake duct at the same time turning the oil pump inner gear with the fingers. 77 Lever out the oil seal and drive a new one squarely into the oil pump casing (photos). Lubricate the oil seal lips. 78 Bolt the pump into position using a new joint gasket. Note one bolt is longer than the others (photo). 79 Bolt on the oil pick-up assembly using a new sealing washer. 80 Fit the crankshaft sprocket and tighten the bolt to specified torque. 81 Fit and tension the timing belt. 82 Fit the sump pan. Screw on a new oil filter cartridge. Wait for the specified period of time (one hour) and then fill the engine with oil. 83 Run the engine for a few minutes, then check and top up the oil level. however, the main bearing shells will almost certainly be worn as well, necessitating a complete overhaul, including crankshaft removal. 87 To remove the piston/connecting rods, the cylinder head must be removed. 88 The big-end caps and their connecting rods are numbered 1, 2, 3 and 4 from the timing cover end of the engine. The numbers are located either side of the rod/cap joint on the engine oil dipstick tube side (photo). 89 Turn the crankshaft as necessary to bring the first connecting rod big-end crankpin to its lowest point, then unscrew the cap bolts and remove the cap and shell bearing. 90 Push the connecting rod/piston assembly up the bore and out of the cylinder block. There is one reservation; if a wear ridge has developed at the top of the bores, remove this by careful scraping before trying to remove the piston/rod assemblies. The ridge will otherwise prevent removal, or break the piston rings during the attempt. 91 Remove the remaining piston/connecting rods in a similar way. If the bearing shells are to be used again, tape them to their respective caps or rods. 92 Removal of the piston rings and separation of the piston from the connecting rod is covered in the next sub-Section. 93 Fit the bearing shells into the connecting rods and caps, ensuring that the recesses into which the shells seat are clean and dry. 94 Check that the piston ring gaps are evenly spaced at 120º intervals. Liberally oil the rings and the cylinder bores. 95 Fit a piston ring clamp to compress the rings, oiling the rings and the clamp interior surfaces liberally. 96 Insert the first piston/connecting rod into its cylinder bore. Make sure that the assembly is the correct one for its particular bore. The cap and rod matching numbers must be towards the engine oil dipstick guide tube and the arrow on the piston crown towards the timing belt (photo). 97 Push the piston into the bore until the piston ring clamp is against the cylinder block and then tap the crown of the piston lightly to push it out of the ring clamp and into the bore (photo). 98 Oil the crankshaft journal and fit the big-end of the connecting rod to the journal. Check that the bearing shells are still in position, then fit the big-end cap and bolts; check that the cap is the right way round (photo). Pistons/connecting rods removal and refitting # 84 Remove the sump pan. 85 Unbolt and remove the oil pump pick-up/filter screen assembly. 86 The big-end bearing shells can be renewed without having to remove the cylinder head if the caps are unbolted and the piston/connecting rod pushed gently about one inch up the bore (the crankpin being at its lowest point). If these shells are worn, 5B.88 Connecting rod and cap numbers 13 5B.96 Piston directional arrow 5B.97 Fitting a piston/connecting rod 5B.98 Fitting a big-end bearing cap 13•26 Supplement: Revisions and information on later models 5B.99 Tightening a big-end cap bolt Fig. 13.5 Piston ring arrangement on the 999 cc engine (Sec 5B) 99 Tighten the big-end bolts to the specified torque (photo). The correct torque is important as the bolts have no locking arrangement. After tightening each big-end, check that the crankshaft rotates smoothly. 100 Repeat the operations on the remaining piston/rod assemblies. 101 Refit the oil pump pick-up assembly using a new sealing ring. 102 Refit the sump pan and the cylinder head as described in earlier sub-Sections. 103 Fill the engine with oil and coolant. the piston rings should be fitted so that the word TOP is uppermost. 105 If new pistons are to be fitted, it is recommended that the gudgeon pins are removed and refitted by a FIAT dealer as the connecting rods must be carefully heated in order to be able to push the gudgeon pin out of the rod small-end, change the piston and push the pin back into position. Locating the gudgeon pin will require a special tool. The gudgeon pin is a sliding fit in the piston but an interference fit in the connecting rod. 106 Refer to Fig. 13.6 for the correct assembly of the piston and connecting rod. Pistons/connecting rods separation and piston ring renewal ™ 104 If the piston/connecting rods have been removed in order to renew the piston rings, refer to Chapter 1, Section 18, but note that Engine/transmission mountings - renewal 107 Refer to Chapter 1, Section 33. Three mountings are used (photos). Fig. 13.6 Piston/connecting rod correctly assembled - 999 and 1108 cc engine (Sec 5B) 1 Piston grade (A) and directional arrow on piston crown (towards timing belt) 2 Rod/cap matching numbers 3 Gudgeon pin offset in piston (0.9 to 1.1 mm) Arrow indicates crankshaft rotation direction PART C: ENGINE REMOVAL AND DISMANTLING Method of removal - general 1 The engine, complete with transmission, should be removed upwards out of the engine compartment. Engine/transmission removal and separation 5B.107A Left-hand front engine/transmission mounting 5B.107B Left-hand rear engine/transmission mounting 5B.107C Right-hand engine mounting 5C.7A Radiator hose connection to coolant distribution tube # Warning: Refer to the beginning of Section 9 before starting any work. 2 Mark the position of the hinges on the underside of the bonnet and then, with the help of an assistant, unscrew the hinge bolts and lift the bonnet to a safe storage area. 3 Drain the coolant; a cylinder block drain plug is not fitted. 4 Drain the engine and transmission oils. 5 Disconnect the battery, negative lead first. 6 Remove the air filter. 7 Disconnect the radiator hoses from the engine (photos). 5C.7B Radiator hose at thermostat housing Supplement: Revisions and information on later models 13•27 5C.9 Fuel hose identification at pump; inlet hose (1), hose to carburettor (2), return hose (3) 5C.12 Choke cable connection at carburettor 5C.15 Ignition coil HT lead connection 8 Disconnect the heater hose from the inlet manifold. 9 On fuel injection models, depressurize the fuel system (refer to Section 9D). Disconnect the fuel inlet and return hoses from the fuel pump (photo) or throttle body, as applicable. 10 Disconnect the brake servo vacuum hose from the inlet manifold. 11 Disconnect the throttle cable from the carburettor, or throttle body as applicable. 12 Disconnect the choke cable, if applicable (photo). 13 Disconnect the leads from the alternator. 14 Disconnect the battery earth lead from the transmission casing. 15 Disconnect the leads from the starter motor and the HT lead from the ignition coil (photo). 16 Disconnect the coolant temperature switch lead and the HT leads from the distributor (photo). 17 Disconnect the lead from the carburettor fuel cut-off (anti-diesel) solenoid valve, where applicable. 18 Disconnect the lead from the oil pressure switch (photo). 19 Although not essential, removal of the radiator is recommended as a precaution against its damage during removal of the power unit. Disconnect the wiring plugs from the fan and thermostatic switches (photos). 20 Disconnect the leads from the reversing lamp switch on the transmission. 21 Disconnect the clutch cable from the release lever on the transmission. 22 Disconnect the speedometer cable from the transmission by unscrewing the knurled ring. 23 Working under the car, disconnect the exhaust downpipes from the manifold and the lower support bracket (photos). 24 Disconnect the gearchange rods from the levers on the transmission. One rod is retained by a spring clip, the other by a 5C.16 Coolant temperature switch 5C.18 Oil pressure switch 5C.19A Radiator retaining clip 13 5C.19B Radiator fan motor wiring connector 5C.19C Radiator fan cut-out thermostatic switch 5C.19D Removing the radiator/fan assembly 13•28 Supplement: Revisions and information on later models 5C.23A Exhaust downpipe flange nuts 5C.23B Unscrewing the exhaust pipe lower support bracket bolt 5C.24B Gearchange rod with ball socket connection 5C.24C Gearchange rod support bracket 5C.25A Two of the left-hand driveshaft joint gaiter retaining plate screws (arrowed) 5C.25B Driveshaft joint gaiter withdrawn 5C.26 Left-hand rear (lower) transmission mounting disconnected 5C.31A Right-hand engine mounting disconnected 5C.24A Gearchange rod connecting pin and spring clip snap-on ball socket. Unbolt the gearchange rod support bracket from the cover plate on the flywheel housing (photos). 25 Remove the screws from the driveshaft inboard gaiter retaining plates (photos). Expect slight oil loss. 26 Disconnect the rear left-hand transmission mounting. Do this by unscrewing the two outer bolts not the centre one. The engine will incline to the rear once the mounting is released (photo). 27 Raise the front of the car and support it securely so that the front roadwheels hang free. 28 Remove the front roadwheels. 29 Unscrew the tie-rod end balljoint taper pin nuts, and then using a suitable “splitter” tool, disconnect the balljoints from the eyes of the steering arms. 30 Unscrew the bolts from the clamps at the bottom of the front suspension struts, tilt the hub carriers outwards and partially disconnect the driveshaft inboard joints from the transmission. 31 Support the weight of the engine/ transmission on a suitable hoist, and then disconnect the right-hand and lefthand front engine/transmission mountings (photos). 32 Unbolt and remove the engine mounting brackets from the engine and the transmission (photo). 33 Raise the power unit slowly until the driveshafts release from the transmission and 5C.31B Left-hand engine mounting and bracket Supplement: Revisions and information on later models 13•29 5C.32 Right-hand engine mounting brackets on body and engine 5C.34 Lifting out the engine and transmission 5C.39 Separating the engine and transmission can be lowered to rest on the exhaust and bodymember. 34 Continue to raise the engine and the transmission until it can be removed from the engine compartment and placed on the work surface (photo). 35 Clean the exterior of the engine and transmission by steam cleaning or using a water soluble solvent. 36 Unbolt and remove the starter motor. 37 Unscrew the flywheel housing-to-engine flange bolts. Note the location of the engine lifting lug. 38 Unbolt and remove the lower cover plate from the flywheel housing. 39 Pull the transmission from the engine. It is located by two hollow dowels and one stud (photo). 46 Unscrew and discard the oil filter cartridge. 47 Unbolt the thermostat housing, discard the joint gasket. 48 Remove the fuel pump, together with its insulator block and actuating pushrod, if applicable. 49 Remove the carburettor, or throttle body, as appropriate. 50 Remove the inlet manifold and discard the joint gasket. 51 Remove the alternator and its drivebelt and withdraw the engine oil dipstick. 52 Unbolt and remove the crankshaft pulley. 53 Unbolt and remove the timing belt tensioner. 54 Remove the timing belt. 55 Unbolt and remove the coolant pump. 56 Remove the cylinder head. 57 Remove and discard the cylinder head gasket. 58 Remove the clutch. 59 Lock the flywheel starter ring gear teeth and remove the crankshaft sprocket bolt and sprocket. 60 Unbolt and remove the sump pan, then the exhaust pipe support bracket (photos). 61 Prevent rotation of the crankshaft by locking the starter ring gear teeth and then unbolt and remove the flywheel. The flywheel can only be fitted in one position as it is located on a dowel. 62 Remove the engine rear plate. Note the small socket-headed screw which holds the timing index plate (photo). 63 Unbolt and remove the oil pump pick-up assembly, followed by the oil pump itself. 64 Turn the engine on its side and remove the piston/connecting rod assemblies. 65 Stand the engine on its cylinder block machined face, and then unbolt and remove the crankshaft rear oil seal retainer. Discard the gasket. 66 Note the markings on the main bearing caps. One line on the cap nearest the timing belt, then two, C for centre cap, then three and four (photo). 67 The caps will only fit one way round. 68 Unbolt the main bearing caps, removing them with the shell bearings. 69 Lift the crankshaft from the crankcase and remove the bearing half shells from the Dismantling - general 40 Refer to Chapter 1, Section 14. Complete dismantling # Warning: Refer to the beginning of Section 9 before starting any work. 41 Unbolt and remove the camshaft cover. 42 Unbolt and remove the timing belt cover. 43 Remove the distributor (Section 10). 44 Remove the hot air collector and the exhaust manifold. 45 Release, disconnect and remove the coolant distribution pipe from the rear of the coolant pump. 5C.60A Removing the sump pan 13 5C.60B Exhaust pipe support bracket attached to crankcase 5C.62 Unscrewing socket-head screw from timing index plate 5C.66 Main bearing cap markings 13•30 Supplement: Revisions and information on later models 5C.80 Timing belt tensioner Fig. 13.8 Checking a cam follower for ovality - 999 and 1108 cc engine (Sec 5C) crankcase. If the shells are to be used again, keep them with their respective bearing caps. 70 The thrust washers which control crankshaft endfloat are located in the crankcase, and retained by the turned-over edges of the centre main bearing shell. 71 The engine is now fully stripped. 81 The timing belt should be inspected at regular intervals for correct adjustment and condition (see Section 3 or “Routine maintenance” at the beginning of the Manual). If there is evidence of worn teeth, cracking or fraying, or oil contamination, renew the belt. The vehicle manufacturers recommend that the belt is renewed whenever it is removed, and it should certainly be renewed at the intervals specified in Section 3 or the main “Routine maintenance” section at the beginning of this Manual as a precautionary measure against belt breakage and consequent expensive engine damage. Examination and renovation 72 The procedures for the following items are essentially as described in Chapter 1, Section 18. Cylinder block and crankcase Crankshaft and bearings Flywheel Oil seals and gaskets Cylinder head 73 Using a straight-edge, check the cylinder head gasket surface for distortion. If it exceeds the specified tolerance, it must be surface ground by your dealer. Fig. 13.7 Metal removing areas (arrowed) on connecting rod - 999 and 1108 cc engine (Sec 5C) 74 Refer to Chapter 1, Section 39, for dismantling and renovation operations. Note that single valve springs are fitted. Oil pump 75 Checking operations are described in sub-Section B. Pistons and connecting rods 76 Refer to sub-Section B. 77 If one or more connecting rods are changed, it is important that its weight is identical to that of the original. Use an accurate balance to weigh them and remove metal if necessary from the new rod in the areas indicated in Fig. 13.7. Camshaft and cam followers PART D: ENGINE REASSEMBLY AND REFITTING Reassembly - general 1 Refer to Chapter 1, Section 19. Complete reassembly # 5D.2 Main bearing shell in crankcase 80 The tensioner is a lubricant-sealed pulley, and it should be tested for smooth and quiet operation by turning it with the fingers. Any evidence of roughness or rattle will indicate the need for a new assembly (photo). 2 With the cylinder block/crankcase standing on the work surface, fit the bearing half shells into their crankcase seats (photo). Make sure that the seats are perfectly clean as dirt or grit trapped under the shell will cause binding when the crankshaft is turned. 3 The centre bearing crankcase web incorporates the thrust washers held by the lips of the bearing shell (photo). 4 Oil the shells and lower the crankshaft into the crankcase (photo). 5 Fit the bearing shells into the main bearing caps, again making sure that the shell seats are perfectly clean (photo). 5D.3 Crankshaft thrust washer at centre bearing 5D.4 Fitting the crankshaft 5D.5 Main bearing cap and shell 78 If the camshaft journals or bearings show any sign of wear or scoring, then the camshaft, or cylinder head, or both must be renewed. 79 The cam followers should be checked for ovality using a micrometer. Unless unworn they should be renewed. Timing belt tensioner and timing belt Supplement: Revisions and information on later models 13•31 5D.6 Fitting a main bearing cap 5D.7A Initial tightening of a main bearing cap bolt 5D.7B Angle-tightening a main bearing cap bolt 6 Fit the main bearing caps in their numbered sequence and the correct way round (photo). 7 Clean the threads of the main bearing cap bolts, lightly oil them and screw them in finger-tight. Tighten all bolts progressively to the specified torque, then check that the crankshaft turns smoothly and evenly (photos). 8 Now check the crankshaft endfloat. Do this using a dial gauge or feeler blades inserted between the machined shoulder of a journal and the side of the bearing cap (photo). Move the crankshaft fully in one direction and then the other to ensure that full movement is obtained. If the endfloat is outside the specified tolerance and new bearing shells have been fitted, then a fault must have occurred during crankshaft regrinding. 9 Fit a new oil seal to the crankshaft rear oil seal retainer. Apply grease to the seal lips. A conventional gasket is not used at the oil seal joint face but a 3.0 mm diameter bead of RTV silicone instant gasket must be applied to a clean surface as shown in Fig. 13.9 (photo). 10 Bolt the retainer into position. One hour at least must be allowed for the RTV to cure before oil contacts it. 11 Turn the engine on its side and fit the piston/connecting rods as described in sub-Section B. 12 Fit a new oil seal to the oil pump, oil the seal lips and bolt on the pump using a new joint gasket (photos). 13 Use a new sealing washer and fit the oil pick-up/filter screen assembly. 14 Fit the engine rear plate and then the flywheel on its mounting flange. Apply thread-locking fluid to (clean) bolt threads and screw in the bolts to the specified torque (photo). Hold the flywheel against rotation by locking the starter ring gear with a suitable tool. 15 Fit the sump pan as described in sub-Section B. 16 Fit the crankshaft sprocket so that the timing mark is visible. Lock the flywheel starter ring gear teeth, and screw in and 5D.8 Checking crankshaft endfloat using a dial gauge Fig. 13.9 Application area for silicone gasket on crankshaft rear oil seal retainer (Sec 5D) 5D.9 Fitting crankshaft rear oil seal retainer 13 5D.12A Oil pump gasket 5D.12B Tightening an oil pump bolt 5D.14 Tightening a flywheel bolt 13•32 Supplement: Revisions and information on later models 5D.16A Crankshaft sprocket showing integral key 5D.16B Tightening the crankshaft sprocket bolt 5D.20 Fitting the timing belt rear cover tighten the sprocket bolt to the specified torque (photos). 17 Refit the clutch to the flywheel as 5D.22 Crankshaft pulley installation described in Chapter 5. Make sure that the driven plate is centralised. 18 Fit the cylinder head. 19 Refit the coolant pump. A conventional gasket is not used at the joint face, but apply a continuous bead of RTV silicone instant gasket 3.0 mm in diameter to the pump mating surface. Allow at least one hour for curing before permitting coolant to contact it. 20 Fit the timing belt rear cover, then the timing belt tensioner and lock in its retracted position (photo). 21 Fit and tension the timing belt as described in sub-Section B. 22 Bolt on the crankshaft pulley (photo). 23 Refit the alternator and drivebelt (photo). 24 Refit the engine oil dipstick. 25 Using a new gasket, bolt on the inlet manifold, tightening the nuts to the specified torque (photos). 26 Refit the carburettor, or throttle body, as appropriate. 27 Fit the fuel pump, insulator block and actuating rod, if applicable. Make sure that a new gasket is placed on each side of the pump insulator block. 28 Using a new gasket, bolt on the thermostat housing. 29 Oil the sealing ring of a new oil filter cartridge and screw it into position using hand pressure only (photo). 30 Refit the coolant distribution pipe to the rear of the coolant pump. Use a new seal (photo). 31 Using a new gasket, bolt on the exhaust manifold (photo). 5D.23 Alternator and drivebelt 5D.25A Inlet manifold gasket 5D.25B Fitting the inlet manifold 5D.29 Oil filter cartridge and mounting base 5D.30 Coolant distribution pipe 5D.31 Exhaust manifold Supplement: Revisions and information on later models 13•33 5D.32 Air cleaner hot air collector plate 5D.38 Lifting eye on flywheel housing flange 5D.45 Connecting ball socket type gearchange rod 32 Fit the hot air collector plate for the air cleaner (photo). 33 Refer to Section 10 and fit the distributor. 34 Bolt on the timing belt cover. 35 Fit the camshaft cover, using a new gasket unless the original one is in perfect condition. torque, having located the lifting eye (photo). 39 Bolt on the starter motor. 40 Refit the cover plate to the flywheel housing, but do not insert the lower bolts at this stage as they retain the support bracket for the gearchange rod. 41 The engine and transmission are now ready for refitting. The operations are a direct reversal of the operations described earlier, but observe the following points. 42 Have the engine/transmission perfectly horizontal and suspended on the hoist. 43 Lower it into position very slowly until it is possible to engage the driveshaft inboard joints with the transmission. 44 Continue lowering until the driveshafts can be fully engaged and the mountings reconnected. Remove the hoist. 45 Tighten all nuts and bolts to the specified torque. Note the method shown for connecting the gearchange rod ball socket using pliers (photo). 46 Refill the engine with oil and coolant and replenish the transmission oil. Engine/transmission reconnection and refitting # 36 Locate the engine in an upright position on wooden blocks to allow for the greater depth of the transmission flywheel housing when it is joined to the engine. 37 Make sure that the clutch driven plate has been centralised, offer the transmission to the engine and locate the flywheel housing on the single stud and dowels. 38 Tighten the connecting bolts to specified Initial start-up after major overhaul 47 Refer to Chapter 1, Section 45. 6 Engine 1301 cc Turbo ie PART A: GENERAL Description 1 This engine is similar in design to the 1301 cc engine described in Chapter 1, but the fuel and ignition systems are different, and a turbocharger, oil cooler and intercooler are fitted. 2 Many dimensions and tolerances have been altered for this engine, and reference should be made to the Specifications at the beginning of this Supplement. 3 Operations which differ from those described in Chapter 1 are given in the following sub-Sections. Lubrication system - description Fig. 13.10 Cutaway view of the 1301 cc Turbo ie engine (Sec 6A) 4 The lubrication system differs from the non-Turbo 1301 cc engine in the following respects. 5 An oil cooler is fitted, which comprises a matrix with inlet and outlet hoses connected to the oil filter cartridge mounting base. 6 A thermostatic control switch is fitted, which diverts the oil flow through the matrix only at oil temperatures above 84ºC (183ºF). Note that a faulty switch will require renewal of the complete oil filter mounting base. 7 Special oil spray nozzles are located in the crankcase main bearing webs, to cool the underside of the pistons. 8 The ball-type valves in the nozzles open when the engine oil pressure reaches 1.2 bars (17.4 lbf/in2). 9 An oil pressure sender unit is screwed into 13 13•34 Supplement: Revisions and information on later models 6A.9 Oil pressure sender unit PART B: OPERATIONS POSSlBLE WITH ENGINE IN CAR Camshaft and camshaft carrier - removal and refitting # Warning: Refer to the beginning of Section 9 before starting any work. Fig. 13.11 1301 cc Turbo ie engine lubrication system (Sec 6A) 1 2 3 4 5 Oil pick-up strainer Oil pump Oil pressure relief valve Oil filter cartridge Main oil gallery 6 7 8 9 10 Camshaft oil feed Low oil pressure switch Engine oil cooler Filter mounting base Turbocharger oil feed the crankcase to operate the oil pressure gauge. In addition, a low oil pressure switch screwed into the camshaft oil gallery actuates a warning light on the instrument panel in the 11 Turbocharger oil return 12 Oil pressure sender unit 13 Oil temperature sender unit 14 Piston oil spray nozzle event of the pressure dropping dangerously low (photo). 10 Oil supply/return ducts provide the turbocharger lubrication. 1 Disconnect the battery, negative lead first. 2 Disconnect its leads and unbolt the distributor from the end of the camshaft, and place it to one side. 3 Disconnect the air intake hose from the throttle valve housing. 4 Disconnect the short throttle control cable from its sector. 5 Remove the throttle cable support bracket. 6 Disconnect the earth leads from the camshaft cover. 7 Refer to Section 9, Part C of this Supplement and remove the following components. Supplementary air valve Inlet manifold with fuel pressure regulator and excess pressure safety switch Injector cooling duct 8 Disconnect the wiring plug from the Microplex ignition anti-knock sensor. 9 Carry out the operations described in Chapter 1, Section 27, paragraphs 4 to 12. 10 Refitting is a reversal of removal, referring to Section 28 of Chapter 1 for the timing belt refitting procedure, and to Chapter 1, Section 27, paragraphs 15 to 18. Cylinder head removal and refitting Fig. 13.12 Piston oil spray nozzle locations - 1301 cc Turbo ie engine (Sec 6A) Letters denote cylinder bore grade # 11 Carry out the operations described in paragraphs 4 to 9 in the preceding sub-Section, then refer to Chapter 1, Section 29, but ignore all references to the carburettor. 12 Note the distributor mounting cover. 13 Four additional cylinder head bolts are used on these engines, adjacent to the spark plugs (photo). Note that their tightening torque differs from the other cylinder head bolts - see Specifications. These four bolts are tightened Supplement: Revisions and information on later models 13•35 Fig. 13.13 Cylinder head bolt tightening sequence on the 1301 cc Turbo ie engine (Sec 6B) Fig. 13.14 Piston ring arrangement on the 1301 cc Turbo ie engine (Sec 6B) separately, after the ten main bolts (see Fig. 13.13). 17 The operations described in Chapter 1, Section 28 generally apply, but the following differences should be noted. 18 Remove the engine compartment right-hand shield. This is secured by plastic clips. To remove a clip, push out its centre pin. 19 The TDC sensor must be unbolted to provide room to remove and refit the timing belt, which can be carried out without having to remove the crankshaft pulley (photos). 20 The belt tensioner on later versions does not incorporate a spring, but is of eccentric centre bolt hole type. Have the pulley bolt released, and tension the belt by turning the pulley using a pin wrench or circlip pliers in the two holes provided. Keep the tension applied while the lockbolt is tightened. Turn the crankshaft through two complete turns, and then check the belt tension. With moderate finger and thumb pressure, the belt should just twist through 6B.16A Engine/transmission centre mounting 6B.16B Engine/transmission right-hand mounting Piston rings 14 The piston rings comprise two compression rings marked TOP, and an oil control ring. 15 Cross-sections and fitting details are shown in Fig. 13.14. Engine mountings - renewal 16 The operations are essentially as described in Section 33 of Chapter 1, but note the design and fixings of the individual mountings used on the turbocharged engine (photos). Timing belt - renewal # 6B.13 Two of the four additional cylinder head bolts (arrowed) 90º when gripped at the mid-point of its longest run (photo). Note: This procedure serves only as a rough guide to setting the belt tension - having it checked by a FIAT dealer at the earliest opportunity is recommended. Oil pump drivegear cover plate 21 Due to the fact that the distributor is driven from the end of the camshaft, the oil pump gear does not have an extension to drive the distributor, which would be the case if it was mounted on the crankcase. 22 The crankcase aperture is therefore covered by a plate and gasket, together with a wiring clip (photo). 6B.19A Removing the TDC sensor 13 6B.19B Removing the timing belt 6B.20 Belt tensioner pulley locknut (arrowed) 6B.22 Distributor drive hole cover plate (arrowed) 13•36 Supplement: Revisions and information on later models 6B.23 Oil cooler Engine oil cooler removal and refitting ¡ 23 The oil cooler is mounted behind the front bumper/spoiler (photo). 24 Disconnect the oil flow and return hoses, either from the cooler or the oil filter cartridge mounting base. Be prepared for some leakage of oil (photos). 25 Unscrew the mounting bolts and remove the oil cooler heat exchanger (photo). 26 When refitting, make sure that the banjo union sealing washers are in good condition. PART C: ENGINE REMOVAL, DISMANTLING, REASSEMBLY AND REFITTING Engine/transmission removal and separation # Warning: Refer to the beginning of Section 9 before starting any work. 1 Refer to Chapter 1, Section 35, and carry out the operations described in paragraphs 1 to 11. 2 Disconnect the excessive air pressure switch from the inlet manifold. 3 Disconnect the ducts and remove the airflow meter. 4 Disconnect the leads from the spark plugs and the distributor LT connector, and unbolt and remove the distributor from the rear end of the camshaft carrier. 5 Disconnect the fuel return hose from the pressure regulator. 6B.24A Oil cooler pipe connection (arrowed) 6B.24B Connections at oil filter cartridge mounting base 6 Disconnect the fuel inlet hose from the injector rail. 7 Disconnect the wiring plugs from the fuel injectors. 8 Disconnect the leads from the oil pressure sender unit, the low oil pressure switch and the coolant temperature switch. 9 Remove the hose/pipe assemblies from the intercooler. 10 Disconnect the throttle control rod at the balljoint. 11 Disconnect the hoses and ducts from the turbocharger and the mechanical bypass valve. 12 Disconnect the leads from the engine speed and anti-knock sensors. 13 Raise the front of the car and support it securely. As the engine/transmission will eventually be lowered to the floor, make sure that there is sufficient clearance under the front end for the assembly to be withdrawn. If the car is over an inspection pit, then the car need only be raised enough to lift the roadwheels from the floor. 14 Remove the front roadwheels. 15 Disconnect the transmission earth cable. 16 Working under the car, remove the engine shields from under the wheel arches. 17 Remove the engine oil cooler, and the intercooler. 18 Unscrew the fixing screws and disconnect the driveshafts from the flanges at the transmission final drive. The right-hand driveshaft will not release until the upper bolt on the suspension strut-to-hub carrier clamp has been removed, and the hub assembly tilted downwards. 19 Disconnect the exhaust downpipe from the manifold, and then remove the front section of the exhaust system. 20 Disconnect the coolant return pipe from the turbocharger. 21 Disconnect the gearchange control rods from the transmission selector rod. Do this by unscrewing the self-locking nut from the bolt which connects the clevis fork. 22 Attach suitable lifting gear to the engine lifting eyes, and take the weight of the engine/transmission. 23 Disconnect the left-front, centre-rear and the right-hand engine/transmission mountings. Do this by removing the bolts from the diamond-shaped mounting plates there is no need to disturb the flexible mounting centre bolts. 24 Lower the engine/transmission to the floor and withdraw it from under the car. 25 Carry out the operations described in Chapter 1, Section 35, paragraphs 27 to 31. Engine dismantling and reassembly 26 The operations are essentially as described for the 1301 cc engine in Chapter 1, but reference must be made to Sections 9 and 10 of this Chapter for the procedures for removing and refitting the components of the fuel injection, turbocharger and ignition systems. Engine/transmission reconnection and refitting 6B.25 Oil cooler mounting bolts (arrowed) 6C.27 Filling the engine with oil 27 The operations are a reversal of those described in paragraphs 1 to 25, but otherwise the following (photo). a) Tighten all nuts and bolts to the specified torque. b) Use a new gasket at the exhaust downpipe-to-manifold flange. c) Check and adjust the clutch pedal travel. d) Refill the cooling system. e) Refill the engine and transmission with oil. f) Reconnect the battery, negative lead last. Supplement: Revisions and information on later models 13•37 7A.11 Topping up the engine oil level 1372 cc engine Initial start-up after major overhaul 28 Refer to Chapter 1, Section 45, but note that an oil pressure gauge is fitted to indicate oil pressure. 29 Check the ignition static timing as described in Section 10. 30 Check the engine idle speed and CO level as described in Section 9. 7 Engine 1372 cc ie and 1372 cc Turbo ie PART A: GENERAL Description 1 The 1372 cc engine is similar in design to the OHC engine fitted to the FIAT Tipo variants. The engine is of four-cylinder, in-line, overhead camshaft type, mounted transversely at the front of the vehicle. 2 The crankshaft runs in five main bearings. Thrustwashers are fitted to the rear (flywheel end) main bearing in order to control crankshaft endfloat. 3 The connecting rods are attached to the crankshaft by horizontally split shell-type big-end bearings. The pistons are attached to the connecting rods by fully-floating gudgeon pins which are secured by circlips. The aluminium alloy pistons are fitted with three piston rings: two compression rings and an oil control ring. 4 The camshaft is driven by a toothed belt and operates the valves via bucket and shim type cam followers. The camshaft is located in a separate housing on top of the cylinder head. 5 The inlet and exhaust valves are each closed by double valve springs, and operate in guides pressed into the cylinder head. 6 The auxiliary shaft, which is also driven by the toothed belt, drives the oil pump. 7 Lubrication is by means of a gear type pump which draws oil through a strainer located in the sump, and forces it through a full-flow filter into the engine oil galleries from 7A.12A Engine sump drain plug - 1372 cc engine where it is distributed to the crankshaft, camshaft and auxiliary shaft. The big-end bearings are supplied with oil via internal drillings in the crankshaft. The undersides of the pistons are cooled by oil spray nozzles located in each main bearing location in the crankcase. 8 A crankcase ventilation system is employed, whereby piston blow-by gases are drawn via an oil separator into the air cleaner, from where they are drawn into the inlet manifold and re-burnt with fresh air/fuel mixture. 9 The 1372 cc ie engine is fitted with a Bosch Mono-Jetronic single point fuel injection (SPi) system. Whilst the higher performance 1372 cc Turbo ie engine is fitted with a Bosch L3.1 (L3.2 from 1992) Jetronic multi-point injection (MPi) system and turbocharger with intercooler and oil cooling. The L3.2 system models are fitted with catalytic converters. Maintenance ™ 10 At the intervals specified in Section 3 or “Routine maintenance” at the beginning of this Manual, carry out the following tasks. 11 Check the engine oil level as follows. With the vehicle parked on level ground, and with the engine having been stopped for a few minutes, withdraw the oil level dipstick, wipe it on a clean rag, and re-insert it fully. Withdraw the dipstick again and read off the oil level relative to the MAX and MIN marks. The oil level should be between the marks. If the level is at or below the MIN mark, top up through the filler on the camshaft cover without delay (photo). The quantity of oil required to raise the level from MIN to MAX on the dipstick is approximately 1.0 litre (1.8 pints). Do not overfill. 12 Renew the engine oil and filter as described in Section 2 of Chapter 1 (photos). 13 Check and if necessary adjust the valve clearances as described in Part B of this Section. 14 Inspect the engine for signs of oil, coolant or fuel leaks and rectify as necessary. 15 Inspect the crankcase ventilation hose for blockage or damage. Clean or renew as necessary. 16 Check the condition and tension of the 7A.12B Engine oil filter removal using a strap wrench - 1372 cc engine Fig. 13.15 Engine oil level dipstick location and level markings on the 1372 cc ie and Turbo ie engines (Sec 7A) timing belt as described in Part B of this Section. 17 Renew the timing belt as described in Part B of this Section. PART B: OPERATIONS POSSlBLE WITH ENGINE IN CAR Valve clearances checking and adjustment # 1 It is important to ensure that the valve clearances are set correctly, as incorrect clearances will result in incorrect valve timing thus affecting engine performance. 2 The clearances must be checked and adjusted with the engine cold. 3 On the ie engine, refer to Section 9 in this Chapter for details and remove the air cleaner unit. 4 On the ie engine disconnect the crankcase ventilation hose from the injector unit and position the hose out of the way. 5 On Turbo ie engines, loosen off the clips and remove the air hose to the inlet manifold (above the camshaft cover). 6 On Turbo ie engines, disconnect the accelerator cable from the throttle housing and the support bracket on the camshaft cover. 7 Unscrew the securing nuts and washers and remove the camshaft cover, noting that on later models two of the nuts also secure the hose clip assembly. Recover the gasket. 8 Numbering from the front (timing belt) end of the engine, the exhaust valves are 1, 4, 5 and 8, and the inlet valves are 2, 3, 6 and 7. 13 13•38 Supplement: Revisions and information on later models 7B.10 Measuring a valve clearance (No 2 valve shown) 7B.14 Special tool for retaining cam follower in depressed position 7B.15 Removing a shim from a cam follower 9 Turn the engine clockwise using a suitable socket on the crankshaft pulley bolt, until the exhaust valve of No 1 cylinder (valve No 1) is fully closed; ie the cam lobe is pointing directly upwards. Alternatively, the engine can be turned by jacking up one front corner of the vehicle and supporting it securely on an axle stand (apply the handbrake and chock the diagonally-opposite rear wheel before jacking), engaging top gear and turning the raised roadwheel in the forward direction of travel. In both cases, it will be easier to turn the engine if the spark plugs are removed, but if this is done, take care not to allow dirt or other foreign matter to enter the spark plug holes. 10 Insert a feeler gauge of the correct thickness between the cam follower shim and the heel of the No 1 cam lobe (photo). If necessary, increase or reduce the thickness of the feeler gauge until it is a firm sliding fit. Record the thickness of the feeler gauge, which will represent the valve clearance for this particular valve. 11 Turn the crankshaft, and repeat the procedure for the remaining valves, recording their respective clearances. Note that the clearance for inlet and exhaust valves differs. 12 If a clearance is incorrect, the relevant cam follower shim must be removed, and a thicker or thinner shim must be fitted to achieve the correct clearance. To remove a shim proceed as follows. 13 Turn the crankshaft until the relevant cam lobe is pointing directly upwards. 14 The cam follower must now be depressed in order to extract the shim. FIAT special tool No 1860642000 is available for this purpose, but alternatively a suitable tool can be improvised (photo). The tool should locate on the rim of the cam follower, leaving enough room for the shim to be prised out by means of the cut-outs provided in the cam follower rim. Depress the cam follower by turning the crankshaft as described previously until the relevant cam lobe is pointing directly downwards, then fit the tool between the camshaft and the edge of the cam follower to retain the cam follower in the depressed position. 15 Ensure that the tool is securely located, as there is a risk of personal injury if the tool is dislodged whilst the cam follower is depressed, then turn the crankshaft until the relevant cam lobe is pointing directly upwards, leaving sufficient room to extract the shim (photo). A pair of angle-nosed pliers will greatly ease removal of the shim. 16 Once the shim has been extracted, establish its thickness. The thickness in mm should be stamped into the face of the shim, although it is possible for wear to obliterate the number, in which case the use of a metric micrometer is the only way to accurately establish the thickness. 17 Refer to the clearance recorded for the valve concerned. If the clearance recorded was larger than that specified, a thicker shim must be fitted, and if the clearance recorded was smaller than that specified, a thinner shim must be fitted. The required thickness of shim can be calculated as follows. Sample calculation - clearance too large: Desired clearance (A) 0.40 mm Measured clearance (B) 0.45 mm Difference (B - A) + 0.05 mm Original shim thickness 3.40 mm Required shim thickness 3.40 + 0.05 = 3.45 mm Sample calculation - clearance too small: Desired clearance (A) 0.50 mm Measured clearance (B) 0.35 mm Difference (B - A) 0.15 mm Original shim thickness 4.55 mm Required shim thickness 4.55 - 0.15 = 4.40 mm 18 Shims are available in thicknesses from 3.20 to 4.70 mm, in steps of 0.05 mm. Note that if several shims have to be changed, they can often be interchanged, thus avoiding the need by buy more new shims than are necessary. 19 The shims should be fitted to the cam followers with the stamped thickness marking against the face of the cam follower. 20 After fitting a shim, rotate the crankshaft as described previously until the relevant cam lobe is pointing directly downwards (resting on the shim), then carefully remove the tool used to retain the follower in the depressed position. 21 Re-check each relevant valve clearance after fitting the shim. 22 On completion, where applicable, lower the vehicle to the ground. 23 Refit the camshaft cover, using a new gasket. 24 On the ie engine, reconnect the hoses and refit the air cleaner unit. 25 On the Turbo ie engine, reconnect the air hose and the accelerator cable. Timing belt tensioner and sprockets removal and refitting # Note: The timing belt must be renewed after removal: never refit a used drivebelt. When fitting the new timing belt it will need to be correctly tensioned and to achieve this the manufacturers specify the use of special tools 1860745200 (18760745300 on Turbo model) and 1860745100. If these tools are not readily available, an approximate setting can be made, but in this instance it is strongly recommended that the car be taken to a FIAT dealer at the earliest opportunity to have the belt tension checked and correctly set using the recommended tools. 26 Loosen off the front right-hand side wheel bolts, then raise and support the car at the front end on axle stands. Remove the front right-hand roadwheel. 27 Remove the underwing shield from the right-hand wheel arch to allow access to the lower timing cover and alternator fixings (photo). 7B.27 Underwing shield (A) showing central compression pin (B) and retaining clip (C). Drive pin through clip to remove Supplement: Revisions and information on later models 13•39 7B.29 Slide back inspection cover in the timing case 7B.30A Camshaft sprocket timing notch aligned with timing (TDC) pointer in timing case 7B.30B Crankshaft pulley and timing cover timing marks 28 Loosen off the retaining clips and detach the air intake pipe from the air filter. 29 Slide back the inspection cover from the upper end of the timing cover (photo). 30 Turn the engine over by hand to bring the TDC timing marks of the flywheelto-bellhousing and the camshaft sprocket -to-rear cover projection into alignment. The crankshaft pulley also has a TDC timing mark and this should be positioned as shown (photos). 31 Loosen off the retaining and adjustment strap fixings, then pivot the alternator towards the engine. 32 Unscrew the upper retaining bolts securing the timing cover. 33 Loosen off the nut securing the alternator and its drivebelt relay, then detach and remove the alternator drivebelt. 34 Unscrew and remove the crankshaft pulley nut. Where the engine is in the car, prevent the crankshaft from turning by engaging top gear and having an assistant apply the brake pedal hard. Unscrew and remove the flywheel housing lower cover bolts and remove the cover. The flywheel ring gear can now be jammed with a suitable lever or implement to prevent the crankshaft from rotating. It should be noted that the pulley nut is tightened to a considerable torque and a strong socket, together with an L-bar and extension tube, will therefore be required to loosen and remove it (photo). Take care not to damage the gearbox/flywheel housing by jamming the flywheel at a weak point. 35 Withdraw the crankshaft pulley (photo). 36 Unscrew and remove the lower retaining bolts and remove the timing cover upwards from the vehicle. 37 Check that the previously mentioned timing marks are still in alignment. Loosen off the timing belt tensioner nut, then with the tension released, withdraw the timing belt from the sprockets. 38 To remove the drivebelt tensioner, undo the securing nut and withdraw the tensioner pulley unit noting that it is in three sections (photos). 39 If desired, the sprockets and the rear timing belt cover can be removed as follows, otherwise proceed to paragraph 49. 40 To remove the camshaft sprocket, a suitable tool must be used to hold the camshaft stationary as the sprocket bolt is loosened. A suitable tool can be improvised as shown in photo 7B.48 using two pieces of steel bar joined together by a pivot bolt, with suitable bolts through the ends of the steel bars to engage with the holes in the sprocket. 41 Unscrew the sprocket bolt, then recover the plain washer, and the thrust washer which is bonded into a plastic sleeve (photo). 42 The sprocket can now be withdrawn from the end of the camshaft. If the sprocket is tight, carefully lever it from the camshaft using two screwdrivers, but take care not to damage the rear timing belt cover. 43 The crankshaft sprocket can be removed by simply pulling it from the end of the 7B.34 Crankshaft pulley nut removal 7B.35 Crankshaft pulley removal 13 7B.38A Timing belt tensioner removal 7B.38B The three sections of the timing belt tensioner 7B.41 Removing the crankshaft sprocket bolt, plain washer and thrust washer 13•40 Supplement: Revisions and information on later models 7B.43 Remove the crankshaft Woodruff key if it is loose 7B.45 Withdrawing the auxiliary shaft sprocket 7B.46 Tightening the auxiliary shaft sprocket bolt crankshaft after the pulley securing nut has been removed. Recover the Woodruff key from the end of the crankshaft if it is loose (photo). 44 To remove the auxiliary shaft sprocket, a suitable tool must be used to hold the sprocket stationary as the securing bolt is loosened (the bolt is extremely tight). In the workshop, a “scissors” style tool was improvised, using two pieces of steel bar joined together by a pivot bolt, with their ends bent through a right-angle to engage securely between the teeth on the sprocket - see photo 7B.46. 45 Unscrew the sprocket bolt, and recover the washer, then withdraw the sprocket from the end of the auxiliary shaft (photo). If the sprocket is tight, carefully lever it from the shaft using two screwdrivers. 46 Refit the auxiliary shaft sprocket, making sure that the lug on the end of the shaft engages with the hole in the sprocket, then tighten the securing bolt to the specified torque (ensure that the washer is in place under the bolt head). Prevent the sprocket from turning as during removal (photo). 47 Where applicable, refit the Woodruff key to the end of the crankshaft, then refit the crankshaft sprocket with the flanged side against the oil seal housing (photo). 48 Refit the camshaft sprocket to the end of the camshaft, making sure that the lug on the end of the shaft engages with the hole in the sprocket, then refit the thrust washer, plain washer, and bolt, and tighten the bolt to the specified torque. Prevent the camshaft from turning as during removal (photo). 49 Refit the belt tensioner pulley assembly, ensuring that the washer is in place under the securing nut, but do not fully tighten the nut at this stage. 50 Before refitting the new timing belt into position, first ensure that the crankshaft and camshaft sprocket timing marks are still aligned as described in paragraph 30 (photo). 51 If the new timing belt has two timing marks on its outer face they must align with the corresponding marks on the crankshaft and camshaft sprockets. Do not distort or bend the belt any more than is necessary during its fitting or its structural fibres may be damaged. 52 Refit the belt around the sprockets and the tensioner pulley, starting at the crankshaft sprocket. One of the timing index marks must align with the scribed mark on the lower edge of the crankshaft sprocket (opposite the Woodruff key) whilst the second mark must align with the timing marks of the camshaft and rear timing belt cover (photos). 53 With the belt fitted over the sprockets and correctly aligned, temporarily refit the crankshaft pulley nut (tightening it to its full torque wrench setting) and then adjust the timing belt tension. 7B.47 Refitting the crankshaft sprocket 7B.48 Tightening the crankshaft sprocket bolt 54 The timing belt tension can be checked approximately by twisting it between the 7B.50 Crankshaft at TDC with key and timing mark aligned (arrowed) 7B.52A Timing belt refitted over the sprockets and tensioner 7B.52B Timing belt mark aligned with scribed mark on crankshaft sprocket (arrowed) Approximate setting Supplement: Revisions and information on later models 13•41 thumb and forefinger at the centre of the run between the auxiliary shaft sprocket and the camshaft sprocket. Using this method it should just be possible to twist the belt through 90º using moderate pressure. 55 To adjust the tension, loosen off the tensioner pulley nut then insert two rods (or screwdrivers) into position in the pulley holes and position a lever between them. 56 Gently lever the tensioner pulley in the required direction to set the tension as described, then initially tighten the pulley nut to lock the tensioner in the required position. 57 Remove the tools from the tensioner, recheck the tension and then tighten the tensioner pulley nut securely. 58 Rotate the crankshaft clockwise through two complete turns using a socket or spanner on the crankshaft pulley nut, then recheck the belt tension. To avoid the possibility of unscrewing the pulley nut, remove the spark plugs to enable the engine to be turned over easier. 59 If further adjustment is required, repeat the previously mentioned procedures. If in doubt, err on the slightly tight side when adjusting the tension. If the belt is set too loose, it may jump off the sprockets resulting in serious damage. 60 Remove the crankshaft pulley retaining nut, fit the timing belt cover, then refit and tighten the pulley nut to the specified torque setting. 61 Refit the remaining components in the reverse order of removal. Tighten the retaining nuts/bolts to the specified torque settings where given. Adjust the tension of the alternator drivebelt as described in Section 8. Adjustment using FIAT special tools 62 Assemble the special tools and fit them to the belt tensioner pulley as shown in Fig. 13.16. When fitted, the tool rod must be as vertical as possible and it is important to note that no sliding weights must be attached to tool No. 1860745100. 63 Slacken the tensioner pulley nut, if not already done. Rotate the crankshaft clockwise through two complete turns using a socket or spanner on the crankshaft pulley nut. The special tool rod may move from the vertical as 7B.77 Removing one of the camshaft housing shorter securing bolts Fig. 13.16 FIAT special tool No. 1860745100 (A) for timing belt adjustment shown fitted to the tensioner pulley - 1372 cc ie and Turbo ie engines (Sec 7B) Use with adapter No. 1860745200 on 1372 cc ie engines and No. 1860745300 on 1372 cc Turbo ie engines the engine is turned over, in which case the joint will need to be re-adjusted to return the rod to the vertical and the operation repeated. 64 With the two revolutions of the crankshaft completed, tighten the belt tensioner pulley nut securely and remove the special tools. 65 Remove the crankshaft pulley retaining nut, fit the timing belt cover, then refit and tighten the pulley nut to its specified torque setting. 66 Refit the remaining components in the reverse order of removal. Tighten the retaining nuts/bolts to the specified torque settings where given. Adjust the tension of the alternator drivebelt as described in Section 8. Camshaft front oil seal renewal # 67 The camshaft front oil seal may be renewed with the engine in the vehicle, and the camshaft in situ, as follows. 68 Remove the timing belt and the camshaft sprocket as described previously in this Section. 69 Punch or drill a small hole in the centre of the exposed oil seal. Screw in a self-tapping screw, and pull on the screw with pliers to extract the seal. 70 Clean the oil seal seat with a wooden or plastic scraper. 71 Lubricate the lips of the new seal with clean engine oil, and drive it into position until it is flush with the housing, using a suitable socket or tube. Take care not to damage the seal lips during fitting. Note that the seal lips should face inwards. 72 Refit the camshaft sprocket and the timing belt as described previously in this Section. Camshaft, housing and followers removal and refitting # Note: The engine must be cold when removing the camshaft housing. Do not remove the camshaft housing from a hot engine. New camshaft housing and camshaft cover gaskets must be used on refitting. 73 If the engine is still in the vehicle, disconnect the battery negative lead. 74 Refer to paragraphs 3 to 7 in this part of this Section for details and remove the camshaft cover. 75 Remove the camshaft sprocket and timing belt as described previously in this Section. 76 Remove the three securing nuts and the single securing bolt, and withdraw the upper section of the rear timing belt cover. 77 Unscrew the camshaft housing securing bolts. There are seven bolts which are accessible from outside the camshaft housing, and five shorter bolts which are accessible from inside the housing (these bolts are normally covered by the camshaft cover). Note that each bolt is fitted with two washers (photo). 78 Carefully lift the camshaft housing from the cylinder head. Be prepared for the cam followers to drop from their bores in the camshaft housing as the camshaft housing is lifted, and ensure that the cam followers are identified for position so that they can be refitted in their original positions (this can be achieved by placing each cam follower over its relevant valve in the cylinder head). 13 13•42 Supplement: Revisions and information on later models 7B.82 Locating a new camshaft housing gasket on the cylinder head 7B.84 Lowering the camshaft housing on to the cylinder head 7B.85 Tightening a camshaft housing securing bolt 79 Recover the gasket. 80 Removal of the camshaft from the housing, and inspection of the components is described in the following sub-Section. 81 Commence refitting by cleaning the gasket mating surfaces of the camshaft housing and cylinder head. 82 Locate a new gasket on the cylinder head, making sure that it is correctly positioned over the dowels (photo). 83 Ensure that the cam followers are correctly located over their relevant valves. 84 Liberally oil the cam follower bores in the camshaft housing, then carefully lower the housing over the cam followers, and onto the cylinder head (photo). Some manipulation will be required to engage the cam followers with their relevant bores in the camshaft housing. 85 Loosely refit all the camshaft housing securing bolts, ensuring that the washers are in place under their heads, then tighten them progressively to the specified torque, starting at the centre of the housing and working outwards in a spiral pattern (photo). 86 Refit the upper section of the rear timing belt cover. 87 Refit the camshaft sprocket and the timing belt as described previously in this Section. 88 Check the valve clearances as described earlier in this Section. 89 Refit the camshaft cover using a new gasket, and tighten the securing nuts, ensuring that the washers are in place (photos). Where applicable, ensure that the hose clip is in place before refitting the relevant camshaft cover securing nuts. 90 The remainder of the refitting procedure is a reversal of that given for removal. 7B.89A Locate a new gasket on the camshaft housing . . . 7B.89B . . . and refit the camshaft cover 7B.93 Withdrawing the camshaft from its housing 7B.97A Prising out the camshaft front oil seal Camshaft, housing and followers - dismantling, inspection and reassembly # 91 With the camshaft housing removed from the cylinder head as previously described proceed as follows. 92 Unscrew the three securing bolts, and withdraw the blanking plate from the end of the camshaft housing. Recover the gasket. 93 The camshaft can now be carefully withdrawn from the blanking plate/distributor end of the camshaft housing, taking care not to damage the bearing journals (photo). 94 With the camshaft removed, examine the bearings in the camshaft housing, and the cam follower bores for signs of obvious wear or pitting. If evident, a new camshaft housing will probably be required. 95 The camshaft itself should show no signs of marks or scoring on the journal or cam lobe surfaces. If evident, renew the camshaft. 96 Examine the cam followers for signs of obvious wear, and for ovality, and renew if necessary. 97 It is advisable to renew the camshaft front oil seal as a matter of course if the camshaft has been removed. Prise out the old seal using a screwdriver, and drive in the new seal until it is flush with the housing, using a suitable socket or tube (photos). 7B.97B Inserting the new camshaft front oil seal Supplement: Revisions and information on later models 13•43 7B.119 Locating a new cylinder head gasket on the cylinder block (engine shown on dismantling stand) 98 Commence reassembly by liberally oiling the bearings in the housing, and the oil seal lip. 99 Carefully insert the camshaft into the housing from the blanking plate/distributor end, taking care to avoid damage to the bearings. 100 Refit the blanking plate using a new gasket. 101 Refit the camshaft housing as described previously in this Section. Cylinder head (1372 cc ie engine) removal and refitting # Note: The following instructions describe cylinder head removal and refitting leaving the camshaft, manifolds and associated items in situ In the head. If required, these items can be removed separately. When removing the cylinder head the engine must be cold - do not remove the head from a hot engine. A new cylinder head gasket and any associated gaskets must be used during reassembly. FIAT specify that the main cylinder head bolts should be renewed after they have been used (ie tightened) four times. If in any doubt as to the number of times that they have been used renew them as a precaution against possible failure. Warning: Refer to the beginning of Section 9 before starting any work. 102 Depressurise the fuel supply system as described in Section 9 of this Chapter. 103 Disconnect the battery negative lead. 104 Drain the engine coolant as described in Section 8. 105 Remove the air cleaner unit as described in Section 9. 106 Remove the timing belt as described previously in this Section. 7B.120A Lower the cylinder head onto the block . . . 7B.120B . . . and engage the positioning dowels in their holes 107 Disconnect the crankcase ventilation hose from the cylinder head and the SPi injector unit. 108 Disconnect the accelerator cable at the engine end. 109 Detach the engine idle speed check actuator lead, the inlet manifold vacuum sensor lead, the coolant temperature sensor lead, the injector supply lead, the throttle position switch lead and the distributor cap (with HT leads). Position them out of the way. 110 Disconnect the brake servo hose from the manifold. 111 Disconnect the coolant hoses from the thermostat and the inlet manifold. 112 Slowly release the fuel supply and return hose retaining clips and detach the hoses from the injector unit housing and connections. Catch any fuel spillage in a clean cloth and plug the hoses to prevent the ingress of dirt and further fuel loss. 113 Unbolt and detach the exhaust downpipe from the manifold. 114 Loosen off the cylinder head retaining bolts in a progressive manner, reversing the sequence shown in Fig. 13.17. When all of the bolts are loosened off, extract them and collect the washers. 115 Check that all fittings and associated attachments are clear of the cylinder head, then carefully lift the head from the cylinder block. If necessary tap the head lightly with a soft-faced mallet to free it from the block, but do not lever it free between the joint faces. Note that the cylinder head is located on dowels. 116 Recover the old cylinder head gasket and discard it. 117 Clean the cylinder head and block mating surfaces by careful scraping. Take care not to damage the cylinder head - it is manufactured in light alloy and is easily scored. Cover the coolant passages and other openings to prevent dirt and carbon from falling into them. Mop out all the oil from the cylinder head bolt holes - if oil is left in them, hydraulic pressure, caused when the bolts are refitted, could cause the block to crack. 118 If required the cylinder head can be dismantled and overhauled as described in paragraphs 129 to 131 of this Section. 119 The new gasket must be removed from its protective packing just before it is fitted. Do not allow any oil or grease to come into contact with the gasket. Commence refitting the cylinder head by locating the new gasket on the cylinder block so that the word “ALTO” is facing up (photo). 120 With the mating faces scrupulously clean, refit the cylinder head into position and engage it over the dowels. Refer to the note at the beginning of this part of the Section, then refit the ten main cylinder head bolts and washers. Screw each bolt in as far as possible by hand to start with. Do not fit the smaller (M8 x 1.25) bolts at this stage (photos). 121 The bolts must now be tightened in stages and in the sequence shown in Fig. 13.17. Refer to the specified torque wrench settings and tighten all bolts to the Stage 1 torque, then using a suitable angle gauge, tighten them to the second stage, then the third stage (photos). 122 With the main cylinder head bolts fully 13 Fig. 13.17 Cylinder head bolt tightening sequence on the 1372 cc ie and Turbo ie engines (Sec 7B) 7B.121A Tighten main cylinder head bolts to specified torque . . . 7B.121B . . . and then through the specified angle 13•44 Supplement: Revisions and information on later models 7B.122 Tighten the smaller cylinder head bolts to their specified torque setting 7B.130A Inlet (A) and exhaust (B) valves and associate components - 1372 cc engine 7B.130B Valve assembly - 1372 cc engine; insert valve into guide . . . tightened, refit the five smaller (M8 x 1.25) bolts adjacent to the line of the spark plug holes and tighten them to their specified torque wrench setting (photo). 123 Reconnect the associated fittings to the cylinder head in the reverse order of removal. Ensure that the mating faces of the exhaust manifold-to-downpipe are clean and fit a new gasket when reconnecting. 124 Ensure that all wiring connections are cleanly and securely made. 125 Top up the engine oil and coolant levels as required on completion. 127 The cylinder head cannot be removed and refitted with the manifolds and turbocharger fitted. It is therefore first necessary to detach and remove the inlet manifold, then the turbocharger and the exhaust manifold as described in Section 9. 128 The ignition distributor is mounted on the side of the engine, not the rear end of the cylinder head as on the “ie” engine. It is therefore only necessary to disconnect the HT leads from the spark plugs. 129 Use a straight-edge to check the cylinder head gasket surface for distortion. If it exceeds the specified tolerance, it must be resurfaced by a FIAT dealer or automotive engineer. 130 Refer to Section 39 in Chapter 1 for the general details on dismantling and renovating operations on the cylinder head but note that there is a spring seat and a flat washer fitted between the cylinder head and the valve springs (photos). Cylinder head (1372 cc Turbo ie engine) - removal and refitting Cylinder head - inspection and renovation ¢ Crankshaft front oil seal removal and renewal # 126 Proceed as described in paragraphs 102 to 125 above for the non-Turbo model, but note the following differences. Note: Refer to a dealer for advice before attempting to carry out valve grinding or seat recutting operations. These operations may not be possible for the DIY mechanic due to the fitment of hardened valve seats for use with unleaded petrol. 131 Remove the timing belt as described earlier in this Section. Note that as mentioned previously, the timing belt will need to be renewed during reassembly. 132 Referring to Fig. 13.18, loosen off the bolt indicated from the timing belt rear cover. 7B.130C . . . locate stem oil seal . . . 7B.130D . . . and drive it into position 7B.130E Refit the flat washer . . . 7B130F . . . locate the spring seat . . . 7B.130G . . . the inner spring . . . 7B.130H . . . the outer spring . . . # Supplement: Revisions and information on later models 13•45 7B.130I . . . and cap 7B.130J Compress spring and refit the split collets 133 Drain the engine oil from the sump into a suitable container. Disconnect the lead from the engine oil level sensor in the sump. 134 Where applicable, unscrew and remove the bolts retaining the gear linkage mounting bracket and the clutch housing lower cover bolts. Remove the cover from the clutch housing. 135 Unscrew the sump retaining nuts and bolts, then lower and remove the sump. 136 Unscrew the timing belt rear cover retaining bolts. 137 Move the timing belt rear cover towards the front of the car to gain access to the retaining bolt and then unscrew and remove the three oil seal housing retaining bolts. Remove the crankshaft front oil seal housing. 138 Note the orientation of the seal in its housing prior to its removal. Support the underside of the housing and carefully drive the old oil seal from the housing using a punch or a tubular drift of suitable diameter. An alternative method is to punch or drill a small hole in the face of the oil seal (but take care not to drill into the housing) and insert a self-tapping screw into the seal. Withdraw the seal by gripping the screw with pliers and pulling the seal from the housing. If necessary, fit a second screw into the seal on the opposite side to provide an even pull. 139 Clean the mating faces of the housing and the front of the crankcase using a suitable scraper. 140 Drive or press the new seal into position in the housing in the reverse order of removal, but ensure that it is correctly orientated as noted during removal (photo). 141 Refit the oil seal housing with a new gasket and tighten the retaining bolts to the specified torque setting (photos). 142 Refit the sump as described later in this Section using a new gasket. Tighten its retaining nuts and bolts to the specified torque. Refit the clutch cover and the gear linkage mounting bracket. 143 Fit the new timing belt, adjust its tension and refit the crankshaft pulley as described earlier in this Section. 144 Reconnect the remaining components that were detached during removal in the reverse order and top up the engine oil level to complete. Crankshaft rear oil seal removal and renewal Fig. 13.18 Timing belt rear cover bolt (arrowed) - 1372 cc ie and Turbo ie engines (Sec 7B) Fig. 13.19 Unscrew the bolts at the points indicated to release the gear linkage mounting bracket - 1372 cc ie and Turbo ie engines (Sec 7B) # 145 If the engine is still in the car, disconnect the battery negative lead. 146 Remove the flywheel as described in the next sub-Section. 147 Punch or drill a small hole in the rear face of the rear oil seal (but take care not to drill into the housing) and insert a self-tapping screw into the seal. Withdraw the seal by gripping the screw with pliers and pulling it from the housing. If necessary, fit a second screw into the seal on the opposite side to provide an even pull. 148 Clean the seal housing, then locate the Fig. 13.20 Removing the timing belt rear cover on the 1372 ie and Turbo ie engines (Sec 7B) 13 7B.140 Driving a new crankshaft front oil seal into its housing 7B.141A Refit the crankshaft front oil seal housing . . . 7B.141B . . . ensuring it is flush with the face of the cylinder block 13•46 Supplement: Revisions and information on later models 7B.158A Locate the flywheel, washer plate and bolts . . . 7B.158B . . . tighten the bolts to the specified torque 7B.165 Apply sealant to the front oil seal housing/cylinder block joint new oil seal, ensuring that it is correctly orientated, and drive it squarely into position. 149 Refit all disturbed components. necessary, and let it cool naturally without quenching in any way. 157 Ensure that the mating faces are clean, then locate the flywheel on the rear of the crankshaft, aligning the previously made marks on the flywheel and crankshaft. 158 Fit the washer plate, and insert the securing bolts, then prevent the flywheel from turning as described in paragraph 151 whilst the bolts are tightened progressively to the specified torque setting in a diagonal sequence (photos). 159 If applicable, refit the clutch as described in Chapter 5. equivalent) to the joints between the crankshaft front and rear oil seal housings and the mating face of the crankcase (photo). 166 Locate the new gasket in position on the crankcase then fit the sump. As it is fitted it will need to be twisted to avoid fouling the oil pump unit. Refit the retaining bolts and nuts and tighten them to the specified torque (photos). 167 Check that the sump drain plug is refitted and fully tightened. If the engine is in the car, top up the engine oil level. Flywheel - removal, inspection and refitting # 150 If not already done, remove the clutch as described in Chapter 5. 151 Prevent the flywheel from turning by jamming the ring gear teeth, or by bolting a strap between the flywheel and the cylinder block. 152 Make alignment marks on the flywheel and the end of the crankshaft, so that the flywheel can be refitted in its original position. 153 Unscrew the securing bolts and remove the washer plate, then withdraw the flywheel. Do not drop it, it is very heavy. 154 With the flywheel removed, the ring gear can be examined for wear and damage. 155 If the ring gear is badly worn or has missing teeth it should be renewed. The old ring gear can be removed from the flywheel by cutting a notch between two teeth with a hacksaw and then splitting it with a cold chisel. Wear eye protection when doing this. 156 Fitting of a new ring gear requires heating the ring to a temperature of 80ºC (176ºF). Do not overheat, or the hard-wearing properties will be lost. The gear has a chamfered inner edge which should fit against the shoulder on the flywheel. When hot enough, place the gear in position quickly, tapping it home if 7B.166A Locate the new gasket . . . Sump removal and refitting ¡ Oil pump - removal, checking and refitting ™ 160 Drain the engine oil from the sump as described in Chapter 1. 161 Disconnect the lead from the engine oil level sensor in the sump. 162 Unscrew and remove the bolts retaining the gear linkage mounting bracket (where applicable) and the clutch housing lower cover bolts. Remove the cover from the clutch housing. 163 Unscrew and remove the sump retaining bolts and nuts and lower the sump from the crankcase. Recover the gasket. 164 Clean all traces of old gasket from the sump, crankcase and both oil seal housing mating surfaces. 165 Commence reassembly by applying sealing compound (FIAT No. 5882442 or 168 Drain the engine oil and remove the sump as described in the previous sub-Section. 169 Unscrew the retaining bolts then withdraw the oil pump and intake pipe/filter from its location within the crankcase. Remove the gasket. 170 If oil pump wear is suspected, first check the cost and availability of new parts and the cost of a new pump. Then examine the pump as described below and decide whether renewal or repair is the best course of action. 171 Unscrew the three securing bolts and remove the oil pump cover (photo). Note that as the cover is removed, the oil pressure relief valve components will be released. 172 Recover the oil pressure relief valve, spring and spring seat. 7B.166B . . . refit the sump . . . 7B.166C . . . and insert the retaining bolts Supplement: Revisions and information on later models 13•47 7B.171 Undo the oil pump cover bolts 7B.175 Correct alignment of scribed marks (arrowed) on gears 7B.176 Check gear-to-body clearance 173 Lift the intermediate plate from the oil pump body. 174 The gears can now be removed from the oil pump body. Inspect them for obvious signs of wear or damage, and renew if necessary. 175 Commence reassembly by lubricating the gears with clean engine oil, and refitting them to the casing. Note that the scribed marks on the top faces of the gears should face each other with the gears installed (photo). 176 Using a feeler gauge, check that the clearance between the gears and the pump body is within the limits given in the Specifications (photo). 177 Using a straight-edge placed across the top of the pump body and the gears, and a feeler gauge, check that the gear endfloat is within the limits given in the Specifications (photo). 178 If either the gear-to-body clearance, or the gear endfloat is outside the specified limits, both gears should be renewed. 179 Locate the intermediate plate on the pump body (photo). 180 Place the pressure relief valve and spring over the pressure relief hole in the intermediate plate, and locate the spring seat over the boss in the pump cover, then refit the pump cover, ensuring that the pressure relief valve components seat correctly (photos). 181 Refit and tighten the pump cover securing bolts. 182 Thoroughly clean the mating faces of the pump and crankcase before refitting the pump. Prime the pump by injecting clean engine oil into it and turning it by hand. 183 Fit the pump using a new gasket, then insert the securing bolts and tighten them. 184 Refit the sump and top up the engine oil level. 185 Remove the sump and the cylinder head as described previously in this Section. 186 The big-end caps and connecting rods normally have identification marks stamped into their sides, facing the coolant pump side of the cylinder block. If no marks are present, use a centre-punch to identify the bearing caps and the connecting rods for location. 187 Turn the crankshaft so that No. 1 crankpin is at its lowest point, then unscrew the nuts and tap off the bearing cap. Keep the bearing shells in the cap and the connecting rod if they are to be re-used, taping them in position if necessary to avoid loss. 188 Using the handle of a hammer, push the piston and connecting rod up the bore and withdraw it from the top of the cylinder block. Loosely refit the cap to the connecting rod. 189 Repeat the procedure given in paragraphs 187 and 188 on No. 4 piston and connecting rod, then turn the crankshaft through half a turn and repeat the procedure on Nos 2 and 3 pistons and connecting rods. 190 The pistons and connecting rods and the big-end bearings can be examined and if 7B.177 Checking the gear endfloat 7B.179 Refitting the intermediate plate Pistons/connecting rods removal and refitting # 13 7B.180A Locate pressure relief valve and spring on the intermediate plate 7B.180B Locate spring seat over boss within pump cover . . . 7B.180C . . . then fit the cover 13•48 Supplement: Revisions and information on later models 7B.194A Fitting a ring compressor to a piston 7B.194B Tapping a piston into its bore 7B.195 Assemble the shell bearing to the connecting rod . . . necessary renovated as described later in this Section. 191 Commence refitting as follows. 192 Clean the backs of the bearing shells and the recesses in the connecting rods and big-end caps. 193 Lubricate the cylinder bores with engine oil. 194 Fit a ring compressor to No. 1 piston, then insert the piston and connecting rod into No. 1 cylinder. With No 1 crankpin at its lowest point, drive the piston carefully into the cylinder with the wooden handle of a hammer (photos). Leave enough space between the connecting rod and the crankshaft to allow the bearing shell to be fitted. The piston must be fitted with the cut-out in the piston crown on the auxiliary shaft side of the engine, and the cylinder identification marking on the connecting rod and big-end cap on the coolant pump side of the engine - see Fig. 13.21. 195 Slide the appropriate bearing shell into position in the connecting rod big-end, then pull the connecting rod firmly into position on the crankpin (photo). 196 Press the appropriate bearing shell into position in the big-end cap (photo). 197 Oil the crankpin, then fit the big-end bearing cap with the cylinder identification marking on the coolant pump side of the engine, and tighten the nuts to the specified torque setting (photos). 198 Check that the crankshaft turns freely. 199 Repeat the procedure in paragraphs 194 to 198 inclusive on the remaining pistons. 200 Refit the cylinder head and the sump. described for the smaller engines in Section 18 of Chapter 1. However, the following additional points should be noted. 202 When renewing a gudgeon pin, first check the fit in the piston. It should be possible to fit the gudgeon pin using hand pressure, but the pin should be a tight enough fit that it does not drop out under its own weight. Oversize gudgeon pins are available as spares if necessary. Use new circlips when refitting the pistons to the connecting rods. 203 Before fitting the pistons to their connecting rods, weigh each piston and check that their weights are all within 2.5 g of each other. If not, the heavier pistons must be lightened by machining metal from the underside of the small-end bosses. This operation must be entrusted to a FIAT dealer or engine reconditioning specialist. 204 The pistons should be fitted to the connecting rods so that the higher, flat side of the piston crown is on the side of the connecting rod with the stamped cylinder identification number, ie the gudgeon pin is offset towards the cylinder identification number see Fig. 13.21. 205 The piston rings should be fitted with the word “TOP” on each ring facing uppermost, or if no marks are visible, as noted during removal. If a stepped top compression ring is being fitted, fit the ring with the smaller diameter of the step uppermost. The ring end gaps should be offset 120º from each other. Use two or three old feeler gauges to assist Fig. 13.21 Correct orientation of piston and connecting rod in engine - 1372 cc ie and Turbo ie engines (Sec 7B) 1 Auxiliary shaft 2 Cylinder identification markings on connecting rod and big-end cap Arrow denotes direction of engine rotation Note offset gudgeon pin 7B.196 . . . and big-end bearing cap . . . Pistons/connecting rods examination and renovation # 201 The procedures for inspecting and renovating the pistons and connecting rod assemblies are in general the same as that 7B.197A . . . then fit the cap . . . 7B.197B . . . and tighten the nuts to the specified torque Supplement: Revisions and information on later models 13•49 fitting, as during removal. Note that the compression rings are brittle, and will snap if expanded too far. 206 If new pistons are to be fitted, they must be selected from the grades available, after measuring the cylinder bores. Normally, the appropriate oversize pistons are supplied by the dealer when the block is rebored. 207 Whenever new piston rings are being installed, the glaze on the original cylinder bores should be removed using either abrasive paper or a glaze-removing tool in an electric drill. If abrasive paper is used, use strokes at 60º to the bore centre-line, to create a cross-hatching effect. Engine/transmission mountings - renewal ¡ 208 The engine/gearbox assembly is suspended in the engine compartment on three mountings, two of which are attached to the gearbox, and one to the engine. Right-hand mounting 209 Apply the handbrake, then jack up the front of the vehicle and support it securely on axle stands. 210 Suitable lifting tackle must now be attached to the engine in order to support it as the engine mounting is removed. No lifting brackets are provided, so care must be taken when deciding on an engine lifting point. In the workshop, a right-angled bracket was made up by bending a suitable piece of steel plate. The bracket was then bolted to the engine using the rear right-hand camshaft housing securing bolt with suitable packing washers. 211 Attach the lifting tackle to the bracket on the engine and just take the weight of the assembly. 212 Working under the vehicle, unbolt the engine mounting bracket from the cylinder block, and unbolt the mounting from the body, then withdraw the bracket/mounting assembly. 213 Unscrew the nut and through-bolt, counter holding the bolt with a second spanner or socket, and separate the mounting from the bracket. 214 Fit the new mounting to the bracket, and tighten the nut to the specified torque, while counterholding the through-bolt using a suitable spanner or socket. 215 Refit the mounting bracket to the cylinder block, and tighten the securing bolts to the specified torque. 216 Refit the mounting to the body and tighten the securing bolts to the specified torque. 217 Disconnect the lifting tackle from the engine, and remove the engine lifting bracket. 218 Lower the vehicle to the ground. order to support the weight of the assembly as the mounting is removed. 221 Attach the lifting tackle to the bracket on the gearbox, and just take the weight of the assembly. 222 Working under the vehicle, unbolt the mounting bracket from the gearbox, and unbolt the mounting from the body, then withdraw the bracket/mounting assembly. 223 Proceed as described in paragraphs 213 and 214. 224 Refit the mounting bracket to the gearbox, and tighten the securing bolts to the specified torque. 225 Refit the mounting to the body and tighten the mounting bolts to the specified torque. 226 Disconnect the lifting tackle from the engine. 227 Lower the vehicle to the ground. PART C: ENGINE REMOVAL AND DISMANTLING Method of removal - general 1 The engine (complete with transmission) is disconnected and lowered downwards through the engine compartment, then withdrawn from the front underside of the car. 1372 cc engine/ transmission - removal and separation # Warning: Refer to the beginning of Section 9 before starting any work. 2 Depressurize the fuel system as described in Section 9 of this Chapter. 3 Disconnect the battery negative lead. 4 Mark the position of the hinges on the underside of the bonnet, then with the aid of an assistant, unscrew the hinge bolts and lift the bonnet clear of the car. Store the bonnet in a safe area. 5 Drain the engine coolant. 6 Drain the engine and transmission oils. 7 Disconnect and remove the air filter. 8 Disconnect the coolant hoses from the engine, including the hose to the inlet manifold. 9 Detach the ignition coil (HT) lead from the distributor. 7C.10 Engine idle speed actuator/SPi unit lead connection (arrowed) 10 Compress the retaining clip and detach the engine idle speed actuator lead from the SPi unit (photo). 11 Disconnect the brake servo vacuum pipe from its connector on the inlet manifold. 12 Disconnect the throttle cable from the SPi unit. 13 Disconnect the engine speed sensor lead. 14 Release and detach the reversing light lead from the switch on the transmission (photo). 15 Before disconnecting the hydraulic hose from the clutch slave cylinder, remove the filler cap from the reservoir and place a piece of polythene sheet over the filler neck, then refit the cap; this will help prevent excess fluid loss. Once disconnected, plug the hose and its cylinder connection to prevent the ingress of dirt into the hydraulic system. 16 Disconnect the wiring connector from the alternator. 17 Position a clean rag under the fuel supply and return hose connections to the SPi unit, then slowly unscrew the hose clips to release the system pressure; catch fuel leakage in the rag and dispose of it safely. Detach the hoses and plug them to prevent ingress of dirt and any further fuel leakage. Position the hoses out of the way. 18 Detach the wiring connector from the engine coolant temperature sender unit (photo). 19 Release the retaining clip and detach the wiring connector from the throttle position switch. Also detach the associated earth leads from the cylinder head. 13 Left-hand mountings 219 Apply the handbrake, then jack up the front of the vehicle and support it securely on axle stands. 220 Suitable lifting tackle must now be attached to the gearbox lifting bracket in 7C.14 Reversing light switch and lead 7C.18 Engine coolant temperature sender and wiring connector 13•50 Supplement: Revisions and information on later models 7C.20 Fuel injector wiring connection 7C.32 Disconnecting the speedometer drive cable from the transmission 7C.36A Engine right-hand mounting 7C.36B Transmission rear mounting 20 Release the retaining clip and detach the wiring connector from the fuel injector connection (photo). 21 Loosen off the front wheel bolts each side, then raise and support the car at the front end on axle stands. When raised, support at a height which will allow the engine and transmission to be withdrawn from the underside when fully disconnected. Ensure that the vehicle is securely supported before working underneath it. 22 Unscrew the wheel bolts and remove the front roadwheels. 23 Release the retaining clips and remove the underwing shield from the right- and left-hand front wheel arch. 24 Relieve the staking, then unscrew and remove the front hub nut using a socket and suitable extension. Repeat the procedure on the opposite front hub. 25 Unscrew the retaining nut and disconnect the tie-rod to steering arm balljoint using a suitable balljoint separator tool. Repeat the procedure on the other side. 26 Note the direction of fitting, then unscrew and remove the hub-to-strut retaining bolts and nuts on each side. 27 Unscrew and remove the anti-roll barto-track control arm retaining nuts each side. 28 Unscrew and remove the front brake caliper hydraulic pipe support bracket bolt each side. Fig. 13.22 The underwing shield retaining clips (arrowed) on the 1372 cc ie and Turbo ie engines (Sec 7C) Fig. 13.23 Engine oil level sensor wiring connector (arrowed) on the 1372 cc ie and Turbo ie engines (Sec 7C) 7C.33 Disconnect the transmission earth strap 29 Pull the wheel hub outwards and detach the driveshaft from it, noting that there may be a small amount of oil spillage as it is withdrawn. Repeat the procedure on the opposite side. 30 Disconnect the wiring connector from the engine oil level sensor lead. 31 Unscrew the retaining nuts to detach and remove the exhaust pipe front section or alternatively, remove the system complete. 32 Unscrew the knurled retaining nut and detach the speedometer cable from the transmission (photo). 33 Unscrew the retaining nut and detach the earth strap from the transmission (photo). 34 Extract the split pin and detach the gear selector rod from the transmission pin. Disconnect the gear engagement and selector levers from the balljoints. 35 The weight of the engine will now need to be supported from above. Connect a suitable lift hoist and sling to the engine. When securely connected, take the weight of the engine/transmission unit so that the tension is relieved from the mountings. 36 Unscrew and remove the engine and transmission support mounting bolts at the points indicated (photos). 37 The engine/transmission unit should now be ready for removal from the vehicle. Check that all of the associated connections and Fig. 13.24 Disconnect the gear selector rod at the connection indicated on the 1372 cc ie and Turbo ie engines (Sec 7C) Fig. 13.25 Gear engagement and selector lever balljoints (arrowed) on the 1372 cc ie and Turbo ie engines (Sec 7C) Supplement: Revisions and information on later models 13•51 7C.36C Transmission front mounting fittings are disconnected from the engine and transmission and positioned out of the way. Enlist the aid of an assistant to help steady and guide the power unit down through the engine compartment as it is removed, If available, position a suitable engine trolley or crawler board under the engine/transmission so that when lowered, the power unit can be withdrawn from the front end of the vehicle and moved to the area where it is to be cleaned and dismantled. 38 Carefully lower the engine and transmission unit, ensuring that no fittings become snagged. Detach the hoist and withdraw the power unit from under the vehicle. 39 To separate the engine from the transmission, unbolt and remove the starter motor, then unscrew the retaining bolts and withdraw the transmission from the engine. As it is withdrawn, do not allow the weight of the engine or transmission to be taken by the input shaft. 40 To remove the clutch unit, refer to Chapter 5 for details. 1372 cc Turbo ie engine/transmission removal and separation # 41 The engine and transmission removal and refitting details for Turbo-engined models are similar to those described for the non-Turbo models in the previous sub-Section, but the following differences should be noted. 42 To provide access for the disconnection of the turbo and related components, first remove the inlet manifold. Removal of the inlet manifold and the turbocharger is described in Section 9 of this Chapter. 43 The ignition distributor on the Turbo engine is driven from the auxiliary shaft and is mounted at the front of the engine, towards the timing cover end. 44 The right-hand driveshaft has a steady bearing and this will need to be unbolted and detached. Engine dismantling - general 45 Refer to Chapter 1, Section 14 for details. 7C.53 Driving a new oil seal into the auxiliary shaft cover Auxiliary shaft - removal, inspection and refitting # 46 Remove the engine and transmission from the vehicle as described previously in this Section part. 47 Drain the engine oil and remove the sump as described in Part B of this Section. 48 Remove the oil pump as described in Part B of this Section. 49 Remove the timing belt and the auxiliary shaft sprocket as described in Part B of this Section. 50 Unscrew the three retaining bolts and remove the auxiliary shaft cover. Remove the gasket. 51 Withdraw the auxiliary shaft from the cylinder block. 52 Examine the shaft and its bearing bushes in the cylinder block for signs of excessive wear and/or damage and renew it if necessary. Bush renewal is described in paragraph 79 in this Section. 53 The cover gasket and the oil seal should always be renewed whenever the cover is removed. To renew the seal, support the cover on blocks of wood and drive out the old seal using a suitable drift inserted in the cut-out in the back of the cover. Clean the seal location in the housing. Drive the new seal into place using a suitable metal tube or socket (photo). The sealing lip must face towards the cylinder block. Smear the sealing lips with clean engine oil before installation. 54 Commence refitting by lubricating the 7C.54 Inserting the auxiliary shaft into the cylinder block (rear timing belt cover removed) auxiliary shaft journals with clean engine oil, then insert the shaft into the cylinder block (photo). 55 Refit the auxiliary shaft cover, using a new gasket, and tighten the securing bolts (photos). 56 Refit the auxiliary shaft sprocket, timing belt, cover and crankshaft pulley as described in Part B of this Section. 57 Refit the engine and transmission with reference to Part D of this Section. Engine complete dismantling # Warning: Refer to the beginning of Section 9 before starting any work. 58 Detach and remove the following ancillary items. Where applicable, refer to the appropriate Chapter or Section within this Chapter for more detailed removal instructions. Engine oil dipstick Ignition distributor and HT leads Fuel pump Alternator Oil filter Oil vapour recovery unit Inlet and exhaust manifolds and associated fuel injection components (as applicable) Clutch unit 59 Refer to Part B of this Section for details and remove the timing cover and drivebelt. 60 Refer to Part B of this Section for details and remove the cylinder head unit. 13 7C.55A Refit the auxiliary shaft cover with a new gasket . . . 7C.55B . . . and tighten the securing bolts 13•52 Supplement: Revisions and information on later models the new plugs with sealant and tap them squarely into position. 78 Clean and examine the cylinder block as described in paragraphs 2 to 7 of Section 18, Chapter 1. 79 If the auxiliary shaft bushes are excessively worn or are oval, they must be renewed. When the new bushes are installed, they may need to be reamed to suit. The renewal of the auxiliary shaft bushes is therefore best entrusted to an engine reconditioner or FIAT dealer. When the bushes are renewed, ensure that the oil hole in each bush is aligned with the oil channel in the cylinder block. 7C.69 Identification notches on No. 3 main bearing cap 7C.70 Measuring crankshaft endfloat using feeler gauge method 61 Refer to Part B of this Section for details and remove the flywheel. 62 Refer to the previous sub-Section for details and remove the auxiliary shaft. 63 Refer to Part B of this Section for details and remove the sump. 64 Refer to Part B of this Section for details and remove the oil pump unit. 65 Refer to Part B of this Section for details and remove the front and rear crankshaft oil seals. 66 Refer to Part B of this Section and remove the piston/connecting rod assemblies. 67 Refer to Part B of this Section for details and remove the crankshaft and main bearing assemblies. crankcase, keeping them identified for location if they are to be re-used, and recover the thrust washers from No. 5 main bearing location. PART D: ENGINE REASSEMBLY Engine components examination and renovation 1 Refer to Chapter 1, Section 19. Crankshaft and main bearings - removal # 68 Unscrew the securing bolts and remove the front and rear crankshaft oil seal housings. Recover the gaskets. 69 Check the main bearing caps for identification marks and if necessary use a centre-punch to identify them. Normally the caps have identifying notches cut into their top face nearest the timing belt end of the engine, with the exception of No 5 cap (flywheel end) which has no marking (photo). 70 Before removing the crankshaft, check that the endfloat is within the specified limits. Ideally a dial gauge should be used, but alternatively feeler gauges can be used as follows. Push the crankshaft as far as possible towards the timing end of the engine, and using a feeler gauge, measure the gap between the rear face of the flywheel mounting flange on the crankshaft and the outer face of the thrust washer (photo). Now push the crankshaft as far as possible in the opposite direction and take the same measurement again. The difference between the two measurements is the crankshaft endfloat. If the endfloat is outside the specified limits, new thrustwashers will be required. 71 Unscrew the bolts and tap off the main bearing caps complete with bearing shells. If the bearing shells are to be re-used, tape them to their respective caps. 72 Lift the crankshaft from the crankcase. 73 Extract the bearing shells from the # 74 With the engine completely stripped, clean all the components and examine them for wear. Each part should be checked and where necessary renewed or renovated as described elsewhere in this Section. Renew main and big-end bearing shells as a matter of course, unless it is known that they have had little wear and are in perfect condition. 75 If in doubt as to whether to renew a component which is still just serviceable, consider the time and effort which will be incurred should the component fail at an early date. Obviously the age and expected life of the vehicle must influence the standards applied. 76 Gaskets, oil seals and O-rings must all be renewed as a matter of course. FIAT specify that the main cylinder head bolts should be renewed after they have been used (ie tightened) four times - if in any doubt as to the number of times the bolts have been used, renew them in any case as a precaution against possible failure. 77 Take the opportunity to renew the engine core plugs while they are easily accessible. Knock out the old plugs with a hammer and chisel or punch. Clean the plug seats, smear 7D.6A No. 3 main bearing shell is plain . . . Reassembly - general Crankshaft and main bearings - refitting # 2 Ensure that the crankcase and crankshaft are thoroughly clean, and that the oilways are clear. If possible, blow through the oil drillings with compressed air, and inject clean engine oil into them. 3 Unless they are virtually new, the old main bearing shells should be renewed. Failure to do so is a false economy. 4 If new bearing shells are being fitted, wipe away all traces of protective grease. 5 Note that there is a tag on the back of each bearing shell, which engages with a groove in the relevant seat in the crankcase or bearing cap. 6 Wipe clean the bearing shell locations in the crankcase with a non-fluffy rag, then lubricate them and fit the five upper halves of the bearing shells to their seats. Note that the centre (No. 3) bearing shell is plain, whereas all the other shells have oil grooves (photos). 7 Fit the thrustwashers to the No. 5 main bearing shell location, with the grooved side of each washer facing away from the face of the cylinder block - ie towards the thrust face of the crankshaft (photos). 8 Wipe the bearing shell locations in the 7D.6B . . . all others have oil groove Supplement: Revisions and information on later models 13•53 7D.7A Locate the thrust washer . . . 7D.7B . . . sliding them into position each side of the No. 5 main bearing 7D.8 Locate the bearing shells into the main bearing caps . . . bearing caps with a soft non-fluffy rag, then fit the lower halves of the bearing shells to their seats. Again, note that the centre (No. 3) bearing shell is plain, whereas all the other shells have oil grooves (photo). 9 Lubricate the crankshaft journals and the upper and lower main bearing shells with clean engine oil (photo). 10 Carefully lower the crankshaft into the crankcase (photo). If necessary, seat the crankshaft using light taps with a rubber-faced hammer on the crankshaft balance webs. 11 Lubricate the crankshaft main bearing journals again, the fit the No. 1 bearing cap. Fit the two securing bolts, and tighten them as far as possible by hand. 12 Fit the No. 5 bearing cap, and as before tighten the bolts as far as possible by hand. 13 Fit the centre and then the intermediate bearing caps, and again tighten the bolts as far as possible by hand. 14 Check that the markings on the bearing caps are correctly orientated as noted during dismantling - ie the identification grooves should face towards the timing side of the engine, then working from the centre cap outwards in a progressive sequence, finally tighten the bolts to the specified torque (photo). 15 Check that the crankshaft rotates freely. Some stiffness is to be expected with new components, but there should be no tight spots or binding. 16 Check that crankshaft endfloat is within the specified limits, as described in paragraph 70 of Part C in this Section. 17 Examine the condition of the front and rear crankshaft oil seals and renew if necessary with reference to Part B of this Section. It is advisable to renew the oil seals as a matter of course unless they are in perfect condition. 18 Lubricate the oil seal lips with clean engine oil, then carefully fit the front and rear oil seal housings using new gaskets. assembly and manifolds as a complete unit. Details of refitting the camshaft housing (and followers) to the cylinder head will be found separately in Part B. Pistons and connecting rods refitting 19 Refer to Part B of this Section. Oil pump - refitting 20 Refer to Part B of this Section. Sump - refitting 21 Refer to Part B of this Section. Flywheel - refitting 22 Refer to Part B of this Section. When the flywheel is bolted in position, refer to Chapter 5 for details and refit the clutch unit. Auxiliary shaft - refitting 23 Refer to Part C of this Section. Cylinder head - refitting 24 Refer to Part B of this Section. Note that this procedure describes cylinder head refitting complete with the camshaft housing Timing belt and covers refitting 25 Refer to Part B of this Section. Engine/transmission reconnection and refitting # Note: A suitable hoist and lifting tackle will be required for this operation. New locktabs will be required for the exhaust downpipe-to-manifold nuts, and suitable exhaust assembly paste, will be required when reconnecting the downpipes to the exhaust manifold. 26 Before attempting to reconnect the engine to the gearbox, check that the clutch friction disc is centralised as described in Chapter 5, Section 8. This is necessary to ensure that the gearbox input shaft splines will pass through the splines in the centre of the friction disc. 27 Check that the clutch release arm and bearing are correctly fitted, and lightly grease the input shaft splines. 28 Mate the engine and gearbox together, ensuring that the engine adapter plate is correctly located, and that the gearbox locates on the dowels in the cylinder block, then refit the engine-to-gearbox bolts and the single nut, but do not fully tighten them at this stage. Ensure that any brackets noted during 13 7D.9 . . . and lubricate the shells 7D.10 Lower the crankshaft into position 7DS.14 Tighten the main bearing cap bolts to the specified torque setting 13•54 Supplement: Revisions and information on later models removal are in place under the engine-to-gearbox bolts. Do not allow the weight of the gearbox to hang on the input shaft as it is engaged with the clutch friction disc. 29 Refit the starter motor, ensuring that the wiring harness bracket is in position on the top bolt. 30 Locate the engine/transmission unit at the front of the car and move it into position under the engine compartment. Attach the lifting sling and hoist as during removal. 31 Enlist the aid of an assistant to help steady the combined units as they are raised into position and to locate the mountings in the engine compartment. 32 Once they are located, tighten the mountings to the specified torque settings, then disconnect the lifting hoist and sling. 33 The remainder of the refitting and reconnection procedures are a reversal of the removal procedure described in Part C. For further details on reconnecting the suspension and driveshaft components, refer to Chapter 7 and Section 13 of this Chapter. 34 Ensure that the exhaust downpipe-tomanifold connection is clean and renew the gasket when reconnecting this joint. Use a smear of exhaust assembly paste on the joint faces. Use new lockwashers and tighten the flange nuts securely. 35 Ensure that all fuel and coolant connections are cleanly and securely made. 36 Ensure that all wiring connections are correct and securely made. 37 Top up the engine and transmission oil levels. 38 Refill the cooling system. 39 Check that all connections are securely made, then reconnect the battery negative lead. Initial start-up after major overhaul 40 Refer to Chapter 1, Section 45. 8 Cooling system PART A: 999 AND 1108 CC ENGINES Description 1 The operation and function of the cooling system is essentially as described in Chapter 2 but note the location of the various components and the routing of the coolant hoses in Fig. 13.26. Fig. 13.26 Cooling system circuit - 999 and 1108 cc engines (Sec 8A) 1 Coolant pump 2 Thermostat Maintenance 2 Topping-up, draining and refilling procedures are as for 1116 and 1301 cc engines in Chapter 2, but note that the coolant capacity is different (see Specifications). Thermostat removal and refitting ¡ 3 The thermostat is located on the left-hand end of the cylinder head, below the distributor. 4 The thermostat cannot be renewed independently of its housing and if faulty the complete assembly must be renewed. 5 Drain the cooling system. 6 Although the thermostat housing can be removed directly from the cylinder head, better access is provided if the distributor is first withdrawn as described in Section 10 of this Chapter (photo). 7 Disconnect the coolant hose from the thermostat housing and unscrew the housing flange bolts. Remove the assembly. Note that it may be necessary to tap it free with a plastic-faced or wooden mallet if stuck in place. 8 Remove the gasket and clean the mating surfaces. 9 Use a new gasket and bolt the assembly into position (photo). 10 Reconnect the coolant hose, then fill and bleed the cooling system. 8A.6 The thermostat housing (shown with distributor removal) on the 999 cc engine 3 Heater matrix Fig. 13.27 Cooling system thermostat in open and closed positions - 999 and 1108 cc engines (Sec 8A) 8A.9 Fitting the thermostat housing. Note the new gasket Supplement: Revisions and information on later models 13•55 Fig. 13.28 Sectional view of the coolant pump on the 999 and 1108 cc engines (Sec 8A) Coolant pump removal and refitting # 11 The coolant pump is located on the crankshaft pulley end of the engine and is driven by the timing belt. 12 The pump cannot be repaired and must be regarded as disposable. 13 Drain the cooling system. 14 Remove the timing belt cover and then set No. 1 piston to TDC. To achieve this, turn the crankshaft pulley bolt until the camshaft sprocket timing mark is aligned with the one on the cylinder head. 15 Release the belt tensioner and slip the timing belt off the camshaft and coolant pump sprockets. 16 Unbolt and remove the coolant pump and clean the mounting face of all old gasket material. 17 Apply a continuous bead of RTV silicone sealant (instant gasket) to the mounting face of the coolant pump and bolt it into position (photos). 18 Check that the camshaft sprocket and the crankshaft have not been moved and fit the timing belt to the camshaft and coolant pump sprockets. The pump sprocket does not require setting in any particular position before connecting the timing belt. 19 Tension the belt as described in Section 5B of this Chapter. 20 Fit the timing belt cover. 21 After allowing one hour for the gasket material to cure, refill and bleed the cooling system. 8A.17A Fitting the coolant pump to the 999 cc engine PART B: 1301 CC TURBO IE ENGINE Description 1 The cooling system on this model has flow and return connections to the turbocharger, and is an essential means of cooling the turbocharger. 2 The radiator cooling fan is of two-speed type, being controlled by a two-stage thermostatic switch screwed into the radiator side tank. 3 According to the coolant temperature level, the fan speed is regulated to provide the most effective cooling. 4 The remote cooling system expansion tank is mounted in the left-hand rear corner of the engine compartment (photo). PART C: 1372 CC IE AND 1372 CC TURBO IE ENGINES Description 1 The cooling system layout and components for the 1372 cc engines is shown in Figs. 13.29 and 13.30. 2 The system on each engine operates in essentially the same manner as that described for the other models in Chapter 2, but the location of components and the coolant hose routings differ according to model. The cooling system expansion tank location differs according to model, being either located on the side of the radiator or 8A.17B Tightening the coolant pump bolts mounted separately on the side of the inner wing panel. 3 On Turbo models, the cooling system also assists in cooling the turbocharger. Maintenance 4 The maintenance procedures are essentially the same as those described for the other models in Chapter 2. ¡ Cooling system - draining, flushing and refilling Warning: Wait until the engine is cold before starting this procedure. Do not allow antifreeze to come into contact with your skin or painted surfaces of the vehicle. Rinse off spills immediately with plenty of water. Never leave antifreeze lying around in an open container or in a puddle in the driveway or on the garage floor. Children and pets are attracted by its sweet smell. Antifreeze is fatal if ingested. 5 Disconnect the battery negative lead. 6 Working inside the vehicle, turn the heater temperature control knob fully to the right, which will fully open the heater coolant valve. 7 With the expansion tank cap removed, place a suitable container beneath the radiator bottom hose. 8 Loosen the clip and ease the bottom hose away from the radiator outlet (photo). Allow the coolant to drain into the container. 9 Reposition the container under the front of the cylinder block, and unscrew the cylinder block drain plug (photo). Allow the coolant to drain into the container. 13 8B.4 Topping up the expansion tank with antifreeze on the 1301 cc engine 8C.8 Bottom hose connection to the radiator 8C.9 Cylinder block drain plug 13•56 Supplement: Revisions and information on later models 1 2 3 4 5 6 7 8 9 Expansion tank Radiator Electric fan Coolant supply hose (thermostat to radiator) Coolant manifold pipe Coolant pump Coolant supply hose (thermostat to heater matrix) Coolant return hose (heater radiator to manifold pipe) Heater matrix 10 Coolant return hose (inlet manifold to manifold pipe) 11 Coolant return hose (radiator to manifold pipe) 12 Thermostat 13 Fan thermostatic switch Fig. 13.29 Cooling system circuit - 1372 cc ie engine (Sec 8C) Fig. 13.30 Cooling system circuit - 1372 cc Turbo ie engine (Sec 8C) 1 2 3 4 Electric fan Radiator Thermostat Coolant supply hose (inlet manifold to heater matrix) 5 Heater matrix 6 Coolant return hose (heater matrix to the manifold pipe) 7 Coolant pump 8 Coolant manifold pipe 9 Coolant supply hose (cylinder block/crankcase to the turbocharger) 10 Coolant return hose (turbocharger to the expansion tank) 11 Coolant supply hose (expansion tank to the manifold pipe) 12 Expansion tank 13 Coolant return hose (radiator to the manifold pipe) 14 Fan thermostatic switch 15 Coolant supply hose (thermostat to the radiator) 16 Coolant return hose (radiator to the expansion tank) Supplement: Revisions and information on later models 13•57 8C.14 Bleed screw location on top of the expansion tank (arrowed) 8C.21A Cooling fan and wiring connector 8C.21B Cooling fan switch wiring connector 10 Apply suitable sealant to the threads of the drain plug, then refit and tighten the plug. 11 Dispose of the drained coolant safely, or keep it in a covered container if it is to be re-used. 12 If required, the system can be flushed through as described in Section 2 of Chapter 2. 13 Before attempting to refill the cooling system, make sure that all hoses have been reconnected, that the hoses and clips are in good condition, and that the clips are tight. Also ensure that the cylinder block drain plug has been refitted and tightened. Note that an antifreeze mixture must be used all year round to prevent corrosion of the engine components - refer to Section 3, Chapter 2. 14 Open the bleed screw in the top of the expansion tank (photo). 15 Remove the expansion tank cap, and fill the system by slowly pouring the coolant into the expansion tank to prevent air locks from forming. 16 Top up the coolant until liquid free from air bubbles emerges from the radiator bleed screw orifice, then close the bleed screw. 17 Continue topping up until the coolant reaches the Maximum mark on the expansion tank. 18 Start the engine and run it until it reaches normal operating temperature, then stop the engine and allow it to cool. Normal operating temperature is reached when the cooling fan cuts into operation. Feel the radiator top hose to ensure that it is hot. If cool, it indicates an air lock in the system. 19 Check for leaks, particularly around disturbed components. Check the coolant level in the expansion tank, and top up if necessary. Note that the system must be cold before an accurate level is indicated. There is a risk of scalding if the expansion tank cap is removed whilst the system is hot. 26 Note their direction of fitting, then prise free the radiator retaining clips. Carefully lift the radiator from the car. 27 Refitting is a reversal of the removal procedure. Ensure that as the radiator is lowered into position, it engages in the two rubber location grommets. 28 With the radiator (and cooling fan) refitted, top up the cooling system as described earlier in this Section (photo). Radiator (and cooling fan) - removal and refitting ¡ 20 Disconnect the battery negative lead. 21 Detach the wiring connectors from the cooling fan and the fan switch located in the radiator (photos). 22 If preferred, the cooling fan unit can be removed separately from the radiator, by undoing the attachment bolts and carefully withdrawing the unit upwards from the vehicle. Take care not to damage the radiator core as it is lifted clear (photo). 23 Drain the cooling system as described earlier in this part of the Section, but note that it will not be necessary to remove the cylinder block drain plug. 24 Undo the retaining screws and remove the front grille panel. 25 Loosen off the retaining clips and detach the upper coolant hose and the expansion hose from the radiator. Thermostat removal and refitting ¡ Note: A new thermostat cover gasket must be used on refitting. 29 Drain the cooling system as described earlier in this Section, but note that there is no need to drain the cylinder block. 30 Disconnect the coolant hoses from the thermostat cover (situated at the gearbox end of the cylinder head). 31 Unscrew the two thermostat cover securing bolts, noting that the left-hand bolt may also secure the HT lead bracket, and remove the thermostat/cover assembly. Recover the gasket (photo). 32 If faulty, the thermostat must be renewed complete with the housing as an assembly. 33 If desired the thermostat can be tested as described in Chapter 2. 34 Refitting is a reversal of removal, bearing in mind the following points. 13 8C.22 Cooling fan to radiator securing bolt 8C.28 Topping up the radiator coolant level on the 1372 cc ie engine. Note orientation of radiator retaining clip (arrowed) 8C.31 Thermostat unit removal on the 1372 cc ie engine (distributor removed for clarity) 13•58 Supplement: Revisions and information on later models 8C.40 Coolant pump/alternator bracket bolt removal 35 Clean the mating faces of the thermostat cover and cylinder head, and use a new gasket when refitting the cover. 36 Refill the cooling system as described earlier in this Section. Coolant pump removal and refitting ¡ Note: A new coolant pump gasket must be used on refitting. If the pump is found to be worn it must be renewed as a complete unit as dismantling and repair is not possible. 37 Disconnect the battery negative lead. 38 Drain the cooling system as described earlier in this Section. 39 Remove the coolant/alternator drivebelt as described in the next sub-Section. 40 Unscrew the four coolant pump securing bolts, noting that two of the bolts also secure the alternator adjuster bracket, and withdraw the pump from the housing (photo). Recover the gasket. 41 Refitting is a reversal of removal, bearing in mind the following points. 42 Use a new gasket between the pump and the housing. 43 Refit and tension the coolant pump/alternator drivebelt as described in the next sub-Section. 44 On completion, refill the cooling system as described earlier in this Section. 8C.52 Fitting a new coolant pump/alternator drivebelt around the pulleys 8C.48 Top side view of water pump, alternator and drivebelt Coolant pump/alternator drivebelt - checking, renewal and tensioning ¡ 45 At the intervals specified in Section 3 or “Routine maintenance” at the beginning of this manual (as applicable), the drivebelt should be checked and if necessary re-tensioned. 46 Access to the drivebelt is made from the underside of the car on the right-hand side. Loosen off the front right-hand roadwheel retaining bolts, then raise and support the car on axle stands at the front. Remove the front roadwheel on the right-hand side. 47 Remove the underwing shield from the right-hand wheel arch by drifting the compression pins out from the retaining clips. Prise free the clips and remove the shield. 48 Additional, though somewhat restricted, access can be obtained from above by removing the air cleaner unit on the non-Turbo ie-engine (photo). 49 Check the full length of the drivebelt for cracks and deterioration. It will be necessary to turn the engine in order to check the portions of the drivebelt in contact with the pulleys. If a drivebelt is unserviceable, renew it as follows (photo). 50 Loosen the alternator mounting and adjuster nuts and bolts and pivot the alternator towards the cylinder block. 8C.53 Tightening the alternator adjuster nut 8C.49 Alternator/water pump drivebelt and tensioner viewed from the right-hand wheel arch 51 Slip the drivebelt from the alternator, coolant pump and crankshaft pulleys. 52 Fit the new drivebelt around the pulleys, then lever the alternator away from the cylinder block until the specified belt tension is achieved. Lever the alternator using a wooden or plastic lever at the pulley end to prevent damage. It is helpful to partially tighten the adjuster nut before tensioning the drivebelt (photo). 53 When the specified tension has been achieved, tighten the mounting and adjuster nuts and bolts (photo). PART D: HEATER UNIT- LATER MODELS Heater unit removal and refitting ¡ 1 The heater unit is removed complete with the facia/control panel. Commence by draining the cooling system as described previously in this Section. 2 Disconnect the battery negative lead. 3 Refer to Section 15 of this Chapter for details and remove the ashtray/cigar lighter and the auxiliary control panel. 4 Undo the upper screw retaining the heater unit to the facia (see Fig. 13.31). 5 Remove the radio from the central facia. 6 Undo the retaining screw on each side at the front of the gear lever console. Prise free Fig. 13.31 Removing the heater unit-tofacia upper retaining screw (Sec 8D) Supplement: Revisions and information on later models 13•59 Fig. 13.33 Heater pipe shield securing screw positions on later models (Sec 8D) Fig. 13.32 Heater unit facia to main facia retaining screw locations (arrowed) (Sec 8D) the trim cover, undo the retaining screw at the rear of the console. Prise free and release the gear lever gaiter and lift clear the central console. 7 Undo the retaining screws and remove the steering column upper and lower shroud. 8 Detach and remove the lower facia trim on the side of the central facia. 9 Referring to Fig. 13.32, unscrew and remove the four heater facia to main facia retaining screws from the points indicated. 10 Undo the two retaining nuts securing the heater to the body on the driver’s side. 11 Undo the retaining screws and remove the pipe shield from the side of the heater unit, then disconnect the coolant supply and return hoses from the heater. As the hoses are detached, be prepared to catch any remaining coolant as it flows from the hoses and heater connections. 12 Undo the remaining two heater unit securing nuts and withdraw the heater unit from the car. As the unit is removed, detach the wiring and position the hoses with their ends pointing upwards to avoid further coolant spillage. 13 Refit in the reverse order of removal. Ensure that the hoses are securely reconnected. Top up the cooling system on completion. Heater unit - dismantling and reassembly ¡ 14 Remove the heater unit as described previously. 15 Pull free the heater/fresh air and blower control knobs (photo). 16 Undo the two retaining screws and withdraw the control panel from the facia. Detach the wiring connectors from the panel illumination lights and remove the panel. 8D.15 Pull free the heater/fresh air and blower control knobs 17 Unscrew the retaining bolts and remove the centre panel from the heater unit. 18 Undo the retaining screws and remove the control lever mounting. 19 Loosen off the grub screws and detach the cables from the control levers. 20 Undo the retaining screws and remove the control valve. 21 Undo the two retaining screws and withdraw the heater matrix from the heater housing. 22 To separate the casing halves, drill out the pop rivet securing the mounting bracket, release the retaining clips and unscrew the securing bolts. 23 Reassemble in the reverse order of dismantling. Check that the control cables are correctly adjusted and that the controls operate in a satisfactory manner before refitting the heater unit to the car. 13 Fig. 13.34 Heater unit components on later models (Sec 8D) 1 Coolant inlet tap 2 Centre panel 3 Side casings 4 Heater matrix 5 Blower fan 13•60 Supplement: Revisions and information on later models 9A.4A Air cleaner toggle clip on the 999 cc model 9 Fuel and exhaust systems Warning: Many of the procedures in this Section require the removal of fuel lines and connections that may result in some fuel spillage. Before carrying out any operation on the fuel system refer to the precautions given in ‘Safety first!’ at the beginning of this Manual and follow them implicitly. Petrol is a highly dangerous and volatile liquid, and the precautions necessary when handling it cannot be overstressed. Caution: On fuel injection models, the system is pressurised, therefore extra care must be taken when disconnecting fuel lines. When disconnecting a fuel line union, loosen the union slowly, to avoid a sudden release of pressure that may cause fuel to spray out and have a container and cloth ready to catch spillages. Fuel pressure checking must be entrusted to a Fiat dealer, or other specialist, who has the necessary special equipment. 9A.4B Air cleaner element on the 999 cc model 9A.5A Air cleaner hot air intake and lower retaining clip on the 999 cc model only unleaded petrol must be used - the use of leaded petrol will destroy the catalyst. 1 It is possible to use unleaded fuel (minimum 95 RON) in the following models with the indicated serial numbers. Engine Serial number 903 cc 146A.000 146A.046 146A.048 999 cc 156A2.00 1108 cc 160A3.000 1116 cc 138B.000 138B.046 146A4000 146A4.048 1299/1301 cc 138B2.000 138B2.046 149A7.000 1149A7.000 146A2.000 1372 cc 146C1.000 146A8.000 160A1.046 2 On all except the 903 cc engine, the use of unleaded fuel is conditional upon the avoidance of constant high speeds and sudden acceleration. 9A.5B Air cleaner cold air intake on the 999 cc model Note: On models with catalytic converters 3 The air cleaner on later models is of the automatic temperature controlled type. The need to move the intake control lever to winter or summer positions is no longer required. 4 The air cleaner on the 999 cc engine is of rectangular shape and the element is removed for renewal after prising back the toggle type clips (photos). 5 To remove this type of air cleaner, disconnect the cold and hot air intake hoses and the large and small breather hoses (photos). 6 Unscrew the nut from the upper casing section and then release the lower toggle type clip and lift the air cleaner from the carburettor (photo). Note the sealing ring between the air cleaner and the carburettor. Unless the ring is in good condition, renew it. 7 If the thermostatically-controlled cold air flap opener in the air cleaner casing is faulty (checked by holding a mirror against the cold air intake when the engine is warm), renew the opener (single fixing screw); no repair is possible (photo). 9A.5C Air cleaner breather hoses on the 999 cc model 9A.6 Air cleaner casing nut on the 999 cc model 9A.7 Air cleaner thermostatic flap opener on the 999 cc model PART A: GENERAL Unleaded fuel Air cleaner - modified types Supplement: Revisions and information on later models 13•61 9A.8A Air cleaner on the 1116 cc, 1299 cc and 1301 cc models 9A.8B Circular type air cleaner element 10 The thermostatically-controlled cold air flap opener is similar to that described in paragraph 7. 11 The air cleaner on the 1372 cc ie engine is of rectangular shape. The element can be removed after releasing the spring clips at the front of the unit, followed by the two screws from its top face. The air cleaner end cover can then be withdrawn and the element removed. The air cleaner unit on the 1372 cc Turbo ie engine is located in the front right-hand corner of the engine compartment. Prise free the four clips to release the top cover and expose the element. Fuel pump (999 and 1108 cc carburettor models) description, removal and refitting ¡ 9A.9A Circular type air cleaner fixing nuts 9A.9B Circular type air cleaner nut on the camshaft cover (arrowed) 8 The air cleaner on the 1116 cc and 1299/1301 cc engine is of circular type. Access to the element is obtained by extracting the three cover nuts and lifting off the lid (photos). 9 The air cleaner casing can be removed after unscrewing the four nuts which hold it to the carburettor and the single nut on the camshaft cover bracket. As the casing is withdrawn, disconnect the hoses from it (photos). 12 The fuel pump is mechanically-operated via a pushrod which is in contact with an eccentric cam on the camshaft. The pump is of sealed, disposable type - no repair or cleaning being possible. 13 To remove the pump, disconnect the flexible hoses and unbolt the pump from the cylinder head. Retain the pushrod and the insulator block. 14 Refitting is a reversal of removal, use new gaskets, one on each side of the insulator block. Fuel tank (999 and 1108 cc engines) 15 In conjunction with the plastic type fuel tank, the breather and fuel level transmitter unit have been modified as shown in Fig. 13.35. 13 Fig. 13.35 Fuel tank and supply circuit on the 999 and 1108 cc engines (Sec 9A) 1 Carburettor 2 Fuel pump 3 Fuel return pipe 4 Fuel feed pipe 5 Tank vent valve 6 Fuel level sender unit 13•62 Supplement: Revisions and information on later models 9B.2A Weber 32 TLF 4/250 carburettor from anti-run-on solenoid valve side PART B: CARBURETTOR MODELS Carburettor (Weber 32 TLF) description Warning: Refer to the beginning of this Section before starting any work. 1 This carburettor is used on the 999 cc engine and is of the single venturi downdraught type, with a manually-operated choke (cold start). 2 The unit incorporates an automatic anti-flooding device, a full power valve and an accelerator pump (photos). 3 The throttle valve block, although incorporating coolant hose stubs, is not in fact coolant-heated. 9B.2B Weber 32 TLF 4/250 carburettor from choke linkage side 9B.2C Weber 32 TLF 4/250 carburettor from accelerator pump side 4 A solenoid-operated idle cut-off valve is fitted to prevent running-on (dieseling) when the ignition is switched off. been extensively overhauled, the mixture may require adjusting. 8 Prise out the tamperproof plug and connect an exhaust gas analyser to the car in accordance with the instrument manufacturer’s instructions (photo). 9 With the engine at normal operating temperature and idling at the specified speed, turn the mixture screw until the CO percentage is within the specified tolerance (photo). 10 If an exhaust gas analyser is not available, turn the mixture screw anti-clockwise to obtain maximum idle speed and then turn it clockwise until the speed just starts to drop. Re-adjust the idle speed screw to bring the idle speed to the specified level. 11 Switch off the engine and remove the test instruments. It is advisable to fit a new tamperproof cap to the mixture screw if it is intended to take the vehicle overseas. This is required to meet legislation in certain countries. Carburettor (Weber 32 TLF) idle speed and mixture adjustment ¢ 5 If the car is not equipped with a rev counter, connect one in accordance with the manufacturer’s instructions. 6 Have the engine at normal operating temperature and idling. Turn the idle speed screw on the carburettor until the speed matches that specified (photo). 7 The idle mixture is set in production, and the adjustment screw is sealed with a tamperproof cap. If, however, the idling is not smooth or the engine or carburettor have ™ Carburettor (Weber 32 TLF) - removal and refitting 9B.2D Weber 32 TLF 4/250 carburettor from throttle linkage side 9B.2E Weber 32 TLF 4/250 carburettor from above 9B.6 Weber 32 TLF 4/250 carburettor idle speed screw (arrowed) 9B.8 Weber 32 TLF 4/250 carburettor mixture screw location under tamperproof plug (arrowed) 12 Remove the air cleaner. 13 Release the clips and disconnect the fuel hoses from the carburettor. Take extreme care that fuel spillage is contained and that there are no naked flames in the vicinity of the work area. Do not smoke. 14 Disconnect the distributor vacuum hose from the carburettor. 9B.9 Mixture adjustment - Weber 32 TLF carburettor Supplement: Revisions and information on later models 13•63 9B.18 Removing the Weber 32 TLF carburettor by gripping air cleaner mounting bracket 9B.19 Carburettor insulator block 9B.22 Fuel filter removal from the Weber 32 TLF carburettor 15 Release the clamp screw and pinch-bolt, and disconnect the choke cable. 16 Slacken the throttle cable by releasing the locknut and turning the adjuster sleeve, then slip the cable nipple out of the notch in the throttle spindle quadrant. 17 Disconnect the lead from the idle cut-off solenoid valve. 18 Unscrew the two long mounting bolts and lift the carburettor from the inlet manifold (photo). 19 Refitting is a reversal of removal, but observe the following points (photo). a) Use a new flange gasket at each side of the insulator block. b) Check that the choke cable is fitted so that full choke can be obtained but the choke is fully off when the choke control lever is pushed right in. c) Adjust the throttle cable so that there is just a slight amount of slackness when the accelerator pedal is released, but when fully depressed, full throttle can be obtained (throttle valve plate quadrant up against its stop). 21 Normally, the following operations are all that will be required to keep the carburettor working perfectly. The unit need not be removed from the manifold unless the throttle block is to be detached; simply remove the air cleaner. 22 Periodically, unscrew the large hexagonal plug adjacent to the fuel inlet pipe, extract the filter and clean it. Refit the filter and plug (photo). 23 Obtain a repair kit for your carburettor which will contain all the necessary replacement gaskets and seals. Extract the top cover and choke diaphragm assembly fixing screws, remove the small plastic cover and push out the bush, then lift the top cover from the carburettor. Discard the gasket (photos). 24 Mop out fuel and sediment from the float chamber. 25 The various jets and calibrated bleeds can then be removed and cleared by blowing them through with air from a tyre pump. Do not attempt to clear them by probing with wire, as this will ruin the calibration. 26 Check the tightness of the fuel inlet needle valve. If necessary, remove the float and its pivot pin so that a close-fitting ring spanner can be used on the valve body. Take care to support the pivot pin pedestals as the pin is tapped out - they are brittle. The throttle valve plate block can be removed after extracting the screws (photos). 27 As reassembly progresses, carry out the following checks and adjustments. 9B.23A Choke linkage cover removal from the Weber 32 TLF carburettor 9B.23B Disconnecting the choke linkage on the Weber 32 TLF carburettor Carburettor (Weber 32 TLF) - overhaul ¢ 20 It is rare for a carburettor to require complete overhaul and if the unit has seen considerable service and wear is detected in the throttle valve spindle bushes, it is recommended that a new or rebuilt carburettor is obtained. 13 9B.23C Underside view of the cover on the Weber 32 TLF carburettor 9B.26A Floats and pivot pin arrangement on the Weber 32 TLF carburettor 9B.26B Fuel inlet valve needle removal from the Weber 32 TLF carburettor 13•64 Supplement: Revisions and information on later models 9B.26C Fuel inlet valve body and washer removal from the Weber 32 TLF carburettor 9B.26D Extracting the throttle valve block screws from the Weber 32 TLF carburettor 9B.26E Throttle valve block gasket on the Weber 32 TLF carburettor Fast idle - adjustment (requires removal of the carburettor) 29 Close the choke valve plate by moving the control lever fully. Retain the lever in this position with a rubber band. 30 The throttle valve plate should now be open to give a gap between its edge and the progression holes as specified. Check the gap using a twist drill of equivalent diameter. 31 If adjustment is required, release the locknut and turn the adjustment screw. Retighten the locknut. 9B.26F Main parts of the Weber 32 TLF carburettor Automatic anti-flooding device adjustment 28 With the carburettor top cover held vertically so that the float arm just touches the fuel inlet needle valve ball, measure between the float and the surface of the flange gasket as shown in Fig. 13.36. If the dimension is not within the specified tolerance, bend the float tab which bears on the needle valve ball. 32 Operate the choke valve plate lever fully. 33 Move the control lever on the automatic anti-flooding device downwards to simulate vacuum pull-down. The choke butterfly should open, leaving a gap (B - Fig 13.38) as specified. Measure the gap with a twist drill of equivalent diameter and make sure that the choke valve plate is in the position shown. If adjustment is required, turn the screw on the diaphragm unit. Fig. 13.36 Float level measurement Weber 32 TLF carburettor (Sec 9B) Fig. 13.37 Fast idle adjustment Weber 32 TLF carburettor (Sec 9B) A = 26.75 to 27.25 mm (1.05 to 1.07 in) A = 0.65 to 0.75 mm (0.026 to 0.030 in) Float level - checking and adjustment 9B.34A Weber 30/32 DMTE carburettor from anti-flood device link side Carburettor (Weber 30/32 DMTE) - general 34 The carburettor is of twin barrel downdraught type with a manually-operated choke and an electronic fuel cut-off overrun valve (photos). 35 Periodically, remove the large hexagonal plug from its location at the fuel inlet pipe stubs, and clean any dirt from the filter gauge. Fig. 13.38 Automatic anti-flooding device adjustment - Weber 32 TLF carburettor (Sec 9B) B = 4.5 mm (0.18 in) Supplement: Revisions and information on later models 13•65 9B.34B Weber 30/32 DMTE carburettor from diaphragm hose side 9B.34C Weber 30/32 DMTE carburettor from choke link side 9B.34D Weber 30/32 DMTE carburettor from throttle link side 9B.34E Weber 30/32 DMTE carburettor from above (with cover removed) 9B.36A Showing idle speed screw (arrowed) and . . . 9B.37A Fuel inlet and return hoses on the Weber 30/32 DMTE carburettor 9B.37B Throttle cable connection on the Weber 30/32 DMTE carburettor Idle speed and mixture adjustment 36 Refer to Chapter 3, Section 7 (photos). Removal and refitting 37 The operations are similar to those described for the Weber 32 TLF earlier in this Supplement, but note that the carburettor is secured by four nuts and additional electrical leads must be disconnected (photos). ¢ Carburettor (Weber 30/32 DMTE) - overhaul 38 The carburettor top cover with float may be removed without the need to withdraw the carburettor from the manifold. Other 9B.36B . . . mixture screw (arrowed) on the Weber 30/32 DMTE carburettor 13 9B.37C Choke cable connection on the Weber 30/32 DMTE carburettor 9B.37D Electrical lead to automatic antiflood device on the Weber 30/32 DMTE carburettor 9B.37E Carburettor lead connectors on the Weber 30/32 DMTE carburettor 13•66 Supplement: Revisions and information on later models 9B.37F Unscrewing a carburettor fixing nut 9B.40 Unscrewing a top cover screw from the Weber 30/32 DMTE carburettor 47 When refitting the new valve, always use a new sealing washer. Float stroke (travel) - see Fig. 3.10 48 The float stroke should be between 42.5 and 43.5 mm when measured from the top cover gasket. Adjust if necessary by bending the tab on the end of the arm. Accelerator pump 9B.45 Float pivot arrangement and needle valve on the Weber 30/32 DMTE carburettor adjustments described in this sub-Section, however, will require removal of the carburettor. 39 Disconnect the short, curved diaphragm hose from the top cover. 40 Extract the top cover screws, lift the cover from the carburettor body, and rotate it in order to release the cranked choke control rod from its key hole (photo). Mop out the fuel and clean the jets. 41 Check the jet sizes and other components against those listed in the Specifications, in case a previous owner has substituted incorrect components (photo). 42 Overhaul procedures are generally as given in Chapter 3, Section 14 for the Weber 30/32 DMTR, but use the Specifications listed in this Chapter. Additional overhaul procedures are given here. Fuel inlet needle valve 43 If a high float level causing flooding of the carburettor has been evident, first check that the inlet valve housing is tight, and its washer is sealing satisfactorily. A leak here will cause fuel to bypass the inlet valve. 44 If the needle valve is to be renewed, remove it in the following way. 45 Access to the fuel inlet needle valve is obtained by carefully tapping out the float arm pivot pin. Take care, the pivot pin pillars are very brittle (photo). 46 Unscrew the fuel inlet valve body and remove the valve and washer. 49 Adjustment of the accelerator pump is very rarely required, but if performance is suspect, carry out the following operations. 50 Fill the carburettor float chamber and then operate the throttle valve plate lever several times to prime the pump. 51 Position a test tube under the accelerator pump jet and give ten full strokes of the throttle lever, pausing between each stroke to allow fuel to finish dripping. 52 The total volume of fuel collected should be as specified. Adjust the nut on the pump control if necessary to increase or decrease the volume of fuel ejected. General 53 When the stage is reached where the valve plate spindle bushes have worn, then the carburettor should be renewed complete. 54 When reassembling the carburettor, use new gaskets which can be obtained in a repair pack. Carburettor (Weber 32 ICEV 61/250 and DMTE 30/32, DMTE 30/150) - general 9B.41 Jets on the Weber 30/32 DMTE carburettor (top cover removed) PART C: BOSCH LE2-JETRONIC FUEL INJECTION SYSTEM Description Warning: Refer to the beginning of this Section before starting any work. 1 The Bosch LE2-Jetronic fuel injection system, fitted to the 1301 cc Turbo ie model, is an electronically controlled multi-point injection (MPi) system. 2 The fuel injectors are fed at constant pressure in relation to inlet manifold vacuum pressure. 3 The system electronic control unit (ECU) actuates the injectors for variable duration, and so supplies the precise volume of fuel required for any given engine speed and load condition. 4 The ECU also monitors the air induction, air temperature, coolant temperature and throttle opening as additional parameters to compute the required opening of the fuel injectors, giving maximum power with fuel economy. Fuel supply system 5 The fuel supply system consists of an electric pump and primary filter, located adjacent to the fuel tank. A fuel pressure peak damper is located next to the pump (photo). 6 Fuel is then pumped through a filter to the fuel rail and injectors. The injectors are of the 55 These carburettor types are fitted to later models according to engine type. They are similar in structure and operation to their equivalents described in Chapter 3. Reference can therefore be made to that Chapter for the description and any operations concerning them, but refer to Section 2 of this Chapter for their specifications. Carburettor (Solex C 30/32-CIC 8) - description 56 This carburettor is fitted as an alternative to the Weber unit on 1116 cc models produced for certain markets. The removal, refitting and overhaul procedures are essentially the same as described earlier for the Weber carburettors. 9C.5 Electric fuel pump/filter/pressure damper assembly location on a 1301 cc Turbo ie model Supplement: Revisions and information on later models 13•67 Fig. 13.39 Sectional view of airflow meter 1301 cc Turbo ie engine (Sec 9C) Fig. 13.40 Sectional view of throttle valve housing - 1301 cc Turbo ie engine (Sec 9C) 1 Floating plate 2 Potentiometer 3 Compensating butterfly valve 4 Damper chamber 6 Spring 7 Bypass channel 8 CO adjusting screw 9 Tamperproof plug Terminals 5, 7, 8, Potentiometer 9 Air temperature sensor E Sealed (not to be touched) 1 2 3 4 solenoid-operated type, actuated from the ECU. 7 Fuel pressure is regulated according to inlet manifold vacuum pressure by a fuel pressure regulator. Excess unpressurised fuel is returned to the fuel tank. Butterfly-type throttle valve Idle bypass channel Idle speed adjusting screw Throttle valve plate setting screw to set the closing position of the throttle valve plate. Supplementary air valve 16 This controls the air volume requirement during cold starting. Essentially, the valve is an electrically-heated bi-metallic strip, which rotates the plate (4) (Fig. 13.41) to vary the volume of air being drawn in through the aperture (1), according to the temperature of the engine. 17 The requirement for additional air during cold starting is to dilute the additional fuel, which is injected and controlled by the ECU as a result of monitoring the engine coolant temperature sensor. Airflow meter Electrical control circuit 8 This component measures the quantity of air drawn into the engine, and converts this into an electric signal which is transmitted to the ECU. 9 The intake air exerts a force on the floating plate (1) (Fig. 13.39) which is connected to a potentiometer (2). 10 A compensating butterfly valve (3) compensates for any reflex pressure which may occur, and is subject to the braking effect of the damper chamber (4). 11 The idle mixture (air/fuel ratio) is altered by means of the screw (8), which alters the cross-section of the bypass channel (7). 12 An integral-type temperature sensor is fitted, the resistance value of which decreases as the temperature of the intake air increases. This facility is used to correct the mixture strength within a pre-determined air temperature range. 18 The main components of the system are the ECU and the system control relay. The relay incorporates a fuel cut-off facility, which cuts off the fuel supply in the event of engine failure, the vehicle turning over, or a fuel line breaking. The relay energises the following electrical components. 19 Coolant temperature sensor, which signals the coolant temperature to the ECU. 20 Throttle position switch, which signals the ECU when the throttle valve plate is closed, in order to actuate the deceleration fuel cut-off device at speeds above 2500 rpm. Fig. 13.41 Supplementary air valve 1301 cc Turbo ie engine (Sec 9C) 1 2 3 4 Aperture Bi-metallic strip Passage Rotating plate (closed position) 21 The switch also signals the ECU at full throttle, so that the mixture can be enriched to cope with full-power requirements. 22 The system control relay also monitors the engine speed directly from the ignition coil primary winding. Maintenance ¡ 23 Regularly check the security of all system hoses, wiring connections and plugs. 24 At the intervals specified in Section 3, renew the fuel filter and the air cleaner element. Fuel filter - renewal ¡ 25 This is located within the engine compartment just above the timing belt cover. Disconnect the fuel hoses, but be prepared for loss of fuel (photo). 26 When fitting the new filter, make sure that the arrow stamped on it is pointing towards the fuel injector rail. Air cleaner element renewal ¡ 27 Prise back the toggle-type clips and take off the air cleaner lid. Remove and discard the element, and wipe any dirt from the inside of the casing (photos). 28 Fit the new element and replace the lid. Throttle valve housing 13 The housing incorporates a conventional butterfly-type throttle valve, actuated by cables and rods from the accelerator pedal. 14 The idle bypass channel (2) (Fig. 13.40) is fitted with an adjustment screw (3) to vary the idle speed. 15 The other screw (4) and locknut are used 13 9C.25 Secondary fuel filter 9C.27A Removing the air cleaner lid 13•68 Supplement: Revisions and information on later models 9C.27B Removing the air cleaner element Idle speed and mixture adjustment ¢ 29 Before carrying out any adjustments, the engine must be at operating temperature, the fan having cut in at second speed and then switched off. 30 Release the locknut and turn the main idle speed screw in the throttle valve housing until the engine idles at the specified speed. This should be all that is necessary to obtain the correct idle speed, as the throttle valve plate base setting is set during production. However, if wear has taken place, or incorrect adjustment has been carried out previously, proceed in the following way. 31 Disconnect the intake duct from the throttle valve housing. Release the locknut on the base (small) adjusting screw, and turn the 9C.31A Disconnecting the throttle valve housing intake duct 9C.31B Idle speed base setting screw (1) and main adjustment screw (2) screw until there is a clearance between the lower edge of the throttle valve plate and the throat wall of between 0.05 and 0.1 mm (photos). 32 With the engine still at operating temperature, start the engine, and having released the locknut, turn the main (large) idle speed screw fully clockwise to close the bypass passage. 33 Now turn the base (small) screw until the engine idles at between 700 and 800 rpm. Tighten the locknut. 34 Finally, turn the main (large) adjusting screw to give an idle speed of between 800 and 900 rpm. 35 It is unlikely that the mixture will require alteration, but if it does, connect an exhaust gas analyser to the car in accordance with the equipment manufacturer’s instructions. 36 With the engine at operating temperature, prise out the tamperproof cap, and turn the mixture screw, which is located in the airflow meter, until the CO level is as given in the Specifications. Turning the screw clockwise richens the mixture, turning it anti-clockwise weakens the mixture. Use a close-fitting Allen key for the adjustment (photo). cables. The component wiring plug will of course be disconnected for the test. ECU connector Component connector plug terminal plug terminal 1 1 of ignition coil 2 2 of throttle position switch 3 3 of throttle position switch 4 50 of ignition switch 5 Earth 5 5 of airflow meter 7 7 of airflow meter 8 8 of airflow meter 9 9 of airflow meter 9 9 of throttle position switch 9 18 of supplementary air valve 9 87 main relay socket 10 10 of coolant temperature sensor 12 Injector terminals 13 Earth Fuel injection system electrical tests 9C.31C Checking throttle valve plate opening with a feeler blade 9C.36 Using an Allen key to adjust the mixture (CO level) ™ 37 When carrying out checks to trace a fault in the system, an ohmmeter should be used for the following tests. 38 Disconnect the multipin connector from the ECU, and also the one from the system control relay, and apply the probes of the ohmmeter in accordance with the following sequence to check for continuity in the System control relay connector plug terminal 1 15 30 31 50 87 87 87 87b Component connector plug terminal 1 of ignition coil 15 of ignition switch Battery positive Earth 50 of ignition switch Injector terminals 18 of throttle position switch 9 of ECU multipin socket Fuel pump (fused) Fig. 13.42 ECU and component connector plug terminals - 1301 cc Turbo ie engine (Sec 9C) For colour code see main wiring diagrams Supplement: Revisions and information on later models 13•69 Fig. 13.43 System control relay connector plug terminals 1301 cc Turbo ie engine (Sec 9C) 9C.55A Disconnecting the duct from the air cleaner 39 Now use the ohmmeter to check the resistance of the following components. microswitch is heard to click immediately the throttle butterfly is opened. Supplementary air valve Fuel injection system mechanical tests 40 Resistance between the terminals should be between 40 and 60 ohms at 20ºC (68ºF). Airflow meter 41 Resistance between terminals 5 and 8 of the potentiometer should be between 330 and 360 ohms at 20ºC (68ºF). 42 Resistance between terminals 8 and 9 of the internal circuit should be between 190 and 210 ohms at 20ºC (68ºF) and between 170 and 190 ohms at 60ºC (140ºF). Coolant temperature sensor 43 At 20ºC (68ºF) the resistance should be between 2 and 4 k ohms. At 50ºC (122ºF) the resistance should be between 600 and 900 ohms. At 90ºC (194ºF) the resistance should be between 100 and 300 ohms. Fuel injectors 44 The winding resistance should between 15 and 17 ohms at 20ºC (68ºF). be Throttle position switch 45 With the throttle butterfly valve closed, there should be continuity between terminals 18 and 2, and with the valve fully open, there should be no continuity between terminals 18 and 3. 46 The throttle position switch should not be disturbed unless absolutely necessary. If it has to be removed, then refit it so that the 9C.55B Removing the air cleaner casing upper bracket ™ Fuel pump 47 To test the pressure of the fuel pump, a pressure gauge will be required, connected into the fuel delivery hose. 48 Remove the multipin plug from the system control relay and bridge terminals 87b and 30. 49 Turn the ignition switch on. The pump should operate and indicate a pressure of between 2.8 and 3.0 bars (40 and 44 lbf/in2). 50 To check the operation of the peak pressure regulator, pinch the fuel return hose. If the fuel pressure increases, the regulator must be faulty, and should be renewed. 51 Check that the fuel pressure increases when, with the engine idling, the accelerator is depressed sharply. Supplementary air valve 52 With the engine at normal operating temperature and idling, pinch the supplementary air valve hose using a pair of pliers. The engine speed should not drop by more than 50 rpm. If it does, renew the valve. Fuel injection system components removal and refitting ™ 53 Disconnect the battery before carrying out any of the following operations. 9C.55C Air cleaner casing lower bracket and bolt (arrowed) Air cleaner 54 Remove the cover and filter element as previously described. 55 Disconnect the duct from the air cleaner casing, and then unbolt and remove the casing. Note that the lower bracket bolt need not be completely removed, only unscrewed, due to the design of the bracket. The air cleaner metal duct is routed over the top of the radiator (photos). Airflow meter 56 Release the securing clip and disconnect the air intake duct (photo). 57 Release the securing clip and disconnect the air outlet duct (photo). 58 Disconnect the wiring plug. 59 Unscrew the fixing screws and remove the airflow meter from its mounting bracket. 13 9C.55D Air cleaner metal duct over radiator 9C.56 Air intake duct at airflow meter (securing clip arrowed) 9C.57 Air outlet duct securing clip removal from airflow meter 13•70 Supplement: Revisions and information on later models 9C.60 Fuel pressure regulator Fuel pressure regulator 60 Disconnect the vacuum hose from the regulator (photo). 61 Anticipate some loss of pressurised fuel, and then disconnect the fuel hose from the regulator. Unbolt and remove the unit. Excessive air pressure switch 62 This is screwed into the end of the inlet manifold. Disconnect the electrical leads and unscrew the switch. Coolant temperature sensor 63 This is screwed into the cylinder head and has wires connected to it. Drain the cooling system before commencing operations. 64 Disconnect the wiring plug and unscrew the sensor. 9C.70A Brake servo vacuum hose connection to inlet manifold Throttle valve housing and inlet manifold 65 Disconnect the air inlet hose from the throttle valve housing, and also the supplementary air valve hose. 66 Disconnect the throttle control cable by swivelling the grooved sector and slipping the cable nipple from its recess. 67 Disconnect the wiring plug from the throttle position (potentiometer) switch. 68 Unbolt the fuel pressure regulator/wiring loom bracket, and also the wiring loom bracket at the other end of the inlet manifold. Move the wiring loom aside. 69 Unbolt and remove the throttle housing support bracket. 70 Disconnect the vacuum servo hose and the fuel pressure regulator vacuum hoses 9C.72 Double nuts at the end of the inlet manifold 9C.73 Removing the inlet manifold 9C.74 Removing an inlet manifold twin pipe stub 9C.75 Disconnecting the fuel delivery hose union 9C.70B Fuel pressure regulator vacuum hose connection at the inlet manifold from the inlet manifold (photos). 71 Disconnect the leads from the excessive air pressure switch. 72 Unscrew the inlet manifold fixing nuts. Note that double nuts are used at the ends of the manifold in order to secure the exhaust heat shield (photo). The shield should be released and lowered to rest on the exhaust manifold. 73 Unscrew and remove the remaining two nuts now exposed by lowering the heat shield and lifting the inlet manifold away (photo). 74 If necessary, the injectors and cooling tube can be withdrawn, and the two twin inlet pipe stubs removed. These are retained with the exhaust manifolds using nuts and washers (photo). Fuel rail and injectors 75 Disconnect the fuel delivery hose from the fuel rail by unscrewing the union nut (photo). Be prepared for some loss of pressurised fuel. 76 Disconnect the fuel return hose. 77 Unbolt the fuel pressure regulator and the wiring loom brackets (photo). 78 Disconnect the air intake hose from the throttle valve housing, and then unbolt and remove the throttle valve housing support bracket (photo). 79 Disconnect the hose from the injector cooling fan, and also disconnect the fan thermo-switch on the underside of the injector cooling air duct (photo). Disconnect the injector wiring plugs, and then slide out the injector cooling air duct. 9C.77 Wiring loom clip and bracket Supplement: Revisions and information on later models 13•71 9C.78 Throttle valve housing support bracket 9C.79 Fan thermostatic switch on underside of injector cooling air duct (duct removed for clarity) 9C.80A Extracting a fuel injector screw 9C.80B Fuel injector removal 9C.81A Fuel injectors attached to fuel rail 9C.81B Fuel injector cooling air duct refitting 9C.81C Injector wiring plug refitting 80 The injector retaining plate socket-headed screws may now be removed using an Allen key. Withdraw the fuel injectors and insulators (photos). 81 New injectors, complete with the fuel rail, must be purchased as an assembly. Always use new seals when refitting the injectors and the insulators (photos). Electronic control unit (ECU) 82 The ECU is located under the right-hand side of the facia panel. 83 Pull off the multipin connector plug and extract the fixing screws (photo). System control relay 84 This is located adjacent to the airflow meter. Pull off the multipin connector and release the relay fixing (photo). Fuel injector cooling fan 85 This is located low down on the left-hand side of the radiator (photo). 86 Remove the spiral-wire-wound hose which connects with the injector cooling duct. 87 Pull off the wiring plug, and unbolt and remove the fan. Supplementary air valve 88 Disconnect the hoses and wiring plug from the valve, which is located on the front face of the engine (photos). 89 Unscrew the mounting bracket screws and withdraw the valve. 13 9C.83 ECU multipin plug 9C.84 Fuel injector system relay 9C.85 Fuel injector cooling fan 13•72 Supplement: Revisions and information on later models 9C.88A Disconnecting the supplementary air valve hose from the inlet manifold 9C.88B Supplementary air valve (arrowed) 9C.90 Throttle position switch (wiring plug arrowed) Throttle position switch (potentiometer) disconnecting the fuel hoses and wiring plug, and then releasing the mounting clamp. Throttle control linkage general 90 This is located on the left side of the throttle valve housing (photo). 91 Disconnect the wiring plug, unscrew the two fixing screws and withdraw the switch. Refitting all components 99 This is of the cable and rod type. Adjust the cable by means of the end fitting and nut, to give the slightest play in the cable when the plastic socket is engaged with the ball on the link rod which runs across the camshaft cover (photos). 100 Keep the cross-shaft pivots and return springs lubricated. 93 The fuel pump can be removed from its location beside the fuel tank after 94 Refitting of all components is a reversal of removal, but observe the following points. 95 Use new seals and gaskets as applicable, noting that three rubber seals are used on each fuel injector and insulator (photos). 96 Adjust the throttle position switch as described in paragraph 46 of this Section. 97 When refitting a new fuel filter, make sure that the arrow marked on it is in the direction of the fuel flow. 98 Apply gasket cement to the threads of the coolant temperature sensor. 9C.95A Fuel injector large seal 9C.95B Fuel injector small seal 9C.95C Fuel injector insulator seal 9C.95D Inlet pipe stub gasket 9C.99A Throttle cable and end fitting (primary section) 9C.99B Throttle cable (secondary section) and cross-shaft Fuel filter 92 Unscrew the fuel line banjo unions from the filter, which is located in the right-hand rear corner of the engine compartment. Be prepared for some loss of pressurised fuel, and mop it up with rags. Fuel pump Fuel tank - general 101 The fuel tank is of metal construction, but note the plastic anti-blow-back compartment between the filler cap and the tank. This is accessible from under the right-hand wheel arch (photo). Supplement: Revisions and information on later models 13•73 9C.99C Throttle cable nipple (arrowed) in throttle linkage cut-out PART D: BOSCH MONO-JETRONIC FUEL INJECTION SYSTEM Warning: Refer to the beginning of this Section before starting any work. Description 1 The Bosch Mono-Jetronic fuel injection system fitted to the 1372 cc ie engine and later 999/1108 ‘FIRE’ models is an electronically-controlled single point injection (SPi) system. The SPi system is a compromise between a conventional carburettor fuel supply system and a multi-point fuel injection (MPi) system. 2 Compared with a conventional carburettor, the SPi unit is a relatively simple device. Fuel is pumped to the SPi unit and then injected into the inlet system by a single solenoid valve (fuel injector), mounted centrally on top of the unit. The injector is energised by an electrical signal sent from the electronic control unit (ECU), at which point the injector pintle is lifted from its seat and atomised fuel is delivered into the inlet manifold under pressure. The electrical signals take two forms of current; a high current to open the injector and a low current to hold it open for the duration required. At idle speed the injector is pulsed at every other intake stroke rather than with every stroke as during normal operation. 3 The air-to-fuel mixture ratio is regulated by values obtained from the ignition coil (engine speed), engine coolant temperature sensor, throttle position switch, and the Lambda sensor in the exhaust system. No adjustments to the fuel mixture are possible. 4 The throttle position switch enables the ECU to compute both throttle position and its rate of change. Extra fuel can then be provided for acceleration when the throttle is suddenly opened. Throttle position information, together with the idle tracking switch, provide the ECU with the closed throttle position information. 5 The 1372 cc ie system layout and principal components are shown in Figs. 13.44 and 9C.99D Throttle cable balljoint retaining spring clip (arrowed) 9C.101 Fuel tank anti-blow-back compartment (arrowed) 13.45. Note that the Digiplex 2 electronic ignition, is not fitted to FIRE models (999/1108 cc). 6 The fuel system pump is immersed in the fuel tank and forms a combined unit with the fuel level sender unit. A cartridge type in-line fuel filter is fitted to the fuel line, and is located in the engine compartment. 7 The fuel pressure in the system is controlled by a mechanical diaphragm regulator in the injection unit turret. High pressure in the system causes the diaphragm to operate and excess fuel is returned to the fuel tank. 8 The air intake temperature and volume is regulated to ensure the correct mixture ratio under all operating conditions. The temperature of the air passing through the injection unit is measured by a sensor which transmits such information to the ECU for the Fig. 13.44 Bosch Mono-Jetronic fuel injection system components and layout on the 1372 cc ie engine (Sec 9D) 1 2 3 4 5 6 7 8 Fuel pump relay Injection system relay Fuel pump fuse Ignition coil Digiplex 2 ECU Battery Idle speed check actuator Injector connector 9 10 11 12 13 Fuel pressure regulator Injector Throttle position switch Ignition switch Coolant temperature sensor 14 Engine speed and TDC sensor 15 16 17 18 19 20 Secondary fuel filter Fuel supply pipe Fuel return pipe Diagnostic socket Fuel injection ECU Fuel pump/level sender unit 13 13•74 Supplement: Revisions and information on later models 9D.8 Atmospheric air intake for air temperature sensor (1). Also shown are the supply and return fuel line connections (2 and 3) and the throttle position sensor (4) Fig. 13.45 Mono-Jetronic fuel injection component locations in the engine compartment - 1372 cc ie engine (Sec 9D) 1 Injector resistor 9 Injector holder turret 2 Lambda sensor signal connector 10 Lambda sensor 3 Lambda sensor heating connector 11 Nut for adjusting accelerator cable 4 Secondary fuel filter 12 Engine speed and TDC sensor connector 5 Fuel return pipe 13 Ignition control unit 6 Fuel supply pipe 14 Ignition coil 7 Coolant temperature sensor 15 Diagnostic socket 8 ECU 16 Fuel pump relay and system relay necessary processing (photo). A conventional paper type air filter element is used and this must be renewed at the specified intervals. 9 The ECU is specific to the model type, its function being to control the fuel system under all operating conditions, including starting from cold - it richens the fuel mixture as required but at the same time prevents flooding. As the engine temperature rises, the injection impulses are progressively reduced until the normal operation temperature is reached. 10 An integral emergency system enables the fuel injection system to remain operational in the event of any of the following components malfunctioning. These items are the coolant temperature sensor, the air intake sensor, the Lambda sensor, the idle speed check actuator and the throttle position switch. In the event of the throttle position switch malfunctioning, the fuel system becomes automatically inoperative. 11 The catalytic converter fitted in the exhaust system minimises the amount of pollutants which escape into the atmosphere. The Lambda sensor in the exhaust system provides the fuel injection system ECU with constant feedback which enables it to adjust the mixture to provide the best possible conditions for the converter to operate. The fuel tank ventilation is contained within the system. This is done by feeding any excess vapours through a carbon filter back into the engine intake, using solenoids and valves, as shown in Fig. 13.46. Maintenance ¡ 12 Regularly check the condition and security of the system hoses and connections. Also check the system wiring connections for condition and security. 13 At the specified intervals, renew the air cleaner element and the fuel filter. Fuel filter - renewal Fig. 13.46 Fuel evaporation control system (Sec 9D) 1 Fuel tank 2 Two-way safety valve 3 Throttle body 4 Two-way vapour vent valve 5 Vapour cut-off solenoid 6 Carbon filter 7 Elbi solenoid 8 ECU ¡ 14 The in-line fuel filter is secured to the right-hand suspension turret in the engine compartment. To remove the filter, first depressurize the fuel in the system as described later in this Part. Supplement: Revisions and information on later models 13•75 9D.15 Secondary fuel filter element 9D.17A Release the air cleaner end cover retaining clips . . . 9D.17B . . . remove the cover and extract the element 15 Undo the retaining strap bolt and withdraw the filter from its location bracket. Disconnect the inlet and supply hose from the filter. If crimp connectors are fitted they will have to be cut free and new screw type clips fitted (photo). 16 Connect the hoses to the new filter ensuring that the filter is correctly orientated (the arrow mark on the body indicates the direction of fuel flow). Ensure that the hose clips are secure before refitting the filter into the retaining strap and securing the retaining bolt. When the engine is restarted, check the hose connections to ensure that there is no fuel leakage from them. 18 Wipe any dirt from within the casing then locate the new element and refit it together with the end cover. the engine is at its normal operating temperature. This is achieved by running the engine for a period of about fifteen minutes, by which time the cooling fan should have cut into operation several times. At this point, stop the engine, turn the ignition key to the OFF position and proceed as follows. 21 Remove the air cleaner unit. 22 Place a 10 mm shim (X) between the adjustment screw and the cam lever (between items 1 and 2 in Fig. 13.47), on the throttle body. This will open the thottle butterfly by 20º. 23 Loosen off the locknuts (C1 and C2) from each linkage end. Insert another 10 mm shim (Y) between the cable support bracket and the nut (C1). Carefully tighten the nut against the shim, ensuring that the cam does not move whilst making the cable slightly taut. 24 Remove the shim (Y) and carefully tighten the nut (C2) against the bracket without allowing the nut (C1) to move. Remove the shim (X) and release the accelerator pedal. Check that the butterfly is completely open when the the pedal is fully depressed. ¡ Air cleaner element renewal 17 Release the spring clip each side at the front of the air cleaner, then unscrew and remove the two screws from the top front face of the housing. Withdraw the end cover and element from the filter unit (photos). Idle speed and mixture adjustment ∞ 19 No manual idle speed and/or mixture adjustments to this type of fuel system are necessary or possible. Any such adjustments are automatically made by the ECU. If the engine idle speed and/or mixture adjustment is suspect, it must be checked using CO measuring equipment; a task best entrusted to a FIAT dealer or a competent garage. The most probable cause of a malfunction is likely to be a defective sensor or incorrectly adjusted accelerator control cable. # Accelerator control system - check and adjustment 20 To check the adjustment of the accelerator control system, it is essential that Fuel system depressurisation ¡ Warning: Refer to the beginning of this Section before starting any work. 25 The fuel system should always be depressurised whenever any fuel hoses and/or system components are disconnected and/or removed. This can easily be achieved as follows. 13 Fig. 13.47 Accelerator linkage and butterfly control lever - SPi models (Sec 9D) A B C1 C2 D Cable Bracket Locknut Locknut Pulley E H K R Pawl Protection Pedal Bush X Y 1 2 Shim Shim Adjustment screw Cam lever 9D.22 Accelerator control rod and cable connections 13•76 Supplement: Revisions and information on later models 9D.26 Fuel pump relay (1), injection control relay (2), Lambda sensor fuse (3) and pump fuse (4) with cover (5) removed 9D.27 Fuel pump relay removal 9D.30 Test lead connected to relay terminals 30 and 87 26 Loosen off the knurled retaining nut and remove the cover from the fuel pump relay. This is located on the left-hand suspension turret in the engine compartment (photo). 27 Carefully pull free the fuel pump relay, then start the engine and run it until it stops (photo). The fuel system is now depressurised. Turn the ignition off before removing/dismantling any components. 28 Do not refit the fuel pump relay or turn the ignition on until the system is fully reconnected. When the engine is ready to be restarted, refit the relay and its cover, then restart the engine in the normal manner. it in a suitable container. With the fuel pump relay removed, connect up a suitable test lead with a 7.5 amp (10 amp on models with catalyst) fuse, in series, to the relay terminals 30 and 87, and check that fuel flows into the container from the supply pipe (photo). If a suitable pressure gauge is available for connecting into the fuel line between the engine compartment fuel filter and the injection unit, check that the fuel pressure is as specified at the beginning of this Chapter. 31 If the pump fails to operate, check that the battery is in good condition and that the pump wiring connections are clean and secure before condemning the pump. To remove the pump unit from the fuel tank, proceed as described in the following sub-Section. for identity to avoid incorrect attachment during refitting. 36 Unscrew the retaining nuts then carefully lift out and withdraw the fuel pump/level sender unit from the fuel tank. 37 Refitting is a reversal of the removal procedure. A new seal gasket must be used and it is important to ensure that all connections are securely and correctly made. Fuel pump and supply system checks ∞ 29 Specialised equipment is required to undertake accurate tests in the fuel supply system and such checks must therefore be entrusted to a FIAT dealer or a fuel injection specialist. If the fuel pump is suspected of malfunction, a basic check can be made by removing the fuel filler cap then listening through the filler pipe, get an assistant to turn on the ignition whilst you listen to hear if the pump is heard to operate in the tank. If the pump fails to operate, check that the pump fuse is sound and that its connection (and also that of the relay) are clean and secure. 30 The pump can be further checked by first depressurising the fuel system as described in the previous sub-Section, then disconnect the fuel supply pipe at the injector unit and locate Fuel pump removal and refitting ¡ 32 Release the pressure from the fuel system as described previously. 33 Move the front seats forward, then tilt the rear seat cushions forward. Peel back the luggage area floor cover from the right-hand side towards the centre to expose the access cover above the pump/sender unit in the floor. Remove the access cover. 34 Detach the wiring connectors from the pump unit and the fuel level sender unit. 35 Loosen off the hose retaining clips and detach the fuel supply and return hoses from the pump unit connections. Mark the hoses Injector unit removal and refitting Intake air temperature sensor - removal and refitting 9D.39 Removing the filter seal from the injector unit 9D.44 Injector unit retaining screws (arrowed) ¡ 38 Depressurise the fuel system as described previously, then disconnect the battery negative lead. 39 Remove the air cleaner unit and the rubber seal (photo). 40 Disconnect the engine idle speed check actuator lead and the throttle position switch lead from the side faces of the injector unit. 41 Undo the retaining clips and detach the fuel supply and return hose from the injector unit. If crimped type retaining clips are fitted, they will have to be carefully cut free and new screw type clips obtained to replace them. Take care not to cut into the hoses when releasing the crimped type clips. 42 Detach the crankcase ventilation hose from the fuel injector unit. 43 Disconnect the accelerator linkage at the throttle lever on the injector unit. 44 Undo the four retaining screws and lift the injector unit from the inlet manifold. Remove the gasket (photo). 45 Clean the injector unit and the inlet manifold mating faces. 46 Refit in the reverse order of removal. ¡ 47 The air temperature sensor is located in the top of the injector unit. It is basically a resistor which varies its value in accordance with the air temperature entering the induction circuit from the air filter. The sensor can then transmit the registered air temperature at this point to the ECU temperature sensor (2). 48 Remove the air cleaner unit and its mounting bracket in the injector. 49 Disconnect the wiring connector from the Supplement: Revisions and information on later models 13•77 9D.49 Fuel injector unit sensor retaining screw (1). Also shown is the intake air temperature sensor (2) 9D.58A Detach the multiplug (arrowed) . . . 9D.58B . . . for access to the ECU retaining screw (arrowed) air temperature sensor. Undo the retaining screw and remove the sensor from the injector unit (photo). 50 Refit in the reverse order of removal. 64 Detach the brake servo vacuum hose from the connector on the manifold. 65 Unscrew and remove the inlet manifold securing bolts and nuts and remove the manifold from the cylinder head. As they are removed, note the location of the fastenings and their spacers. 66 Remove the gasket and clean the mating faces of the manifold and the cylinder head. The gasket must be renewed when refitting the manifold. 67 Refitting is a reversal of the removal procedure. Ensure that the spacers are correctly located (where applicable) and tighten the retaining bolts and nuts to the specified torque settings. 72 Undo the manifold-to-cylinder head securing bolts/nuts and withdraw and remove the manifold and heat shield. 73 Remove the gasket and clean the mating faces of the manifold, cylinder head and downpipe flange. The gasket must be renewed when refitting the manifold. 74 Refitting is a reversal of the removal procedure. Tighten the retaining bolts/nuts to the specified torque setting. Fuel injector removal and refitting ¡ 51 Depressurise the fuel system as described previously, then disconnect the battery negative lead. 52 Remove the air cleaner unit. 53 Release the injector feed wiring mutliplug and detach it from the injector. 54 Bend over the locking tabs retaining the injector screws, then undo and remove the screws. Withdraw the injector retaining collar, then carefully withdraw the injector (noting its orientation) followed by its seal. 55 Refit in the reverse order of removal. Always use new seals in the unit and the retaining collar and lightly lubricate them with clean engine oil prior to assembly. Take care not to damage the seals when fitting and also when the injector is fitted; check that it engages correctly. Fuel injection electronic control unit (ECU) removal and refitting ¡ 56 The control unit is located under the facia on the driver’s side of the vehicle. Commence by disconnecting the battery negative lead. 57 To gain access to the control unit, detach and remove the trim panel from the underside of the facia on the driver’s side of the car. 58 Disconnect the wiring multiplug from the control unit, then undo the retaining screw and remove the unit from the car (photos). 59 Refit in the reverse order of removal. Inlet manifold removal and refitting Exhaust manifold removal and refitting ¡ 68 Remove the inlet manifold as described previously (1372 cc models only). 69 Disconnect the Lambda sensor lead (photo). 70 Raise and support the car at the front end on axle stands to allow sufficient clearance to work underneath the car and disconnect the exhaust downpipe from the manifold. 71 Straighten the tab washers, then unscrew and remove the exhaust downpipeto-manifold retaining nuts (photo). Detach the downpipe from the manifold. Support the downpipe so that the Lambda sensor will not get knocked and/or damaged. Catalytic converter general information 75 The catalytic converter is a reliable and simple device which needs no maintenance in itself, but there are some facts of which an owner should be aware if the converter is to function properly for its full service life. a) DO NOT use leaded petrol in a car equipped with a catalytic converter - the lead will coat the precious metals, reducing their converting efficiency and will eventually destroy the converter. b) Always keep the ignition and fuel systems well-maintained in accordance with the maintenance schedule - particularly, ensure that the air cleaner filter element the fuel filter and the spark plugs are renewed at the correct interval - if the intake air/fuel mixture is allowed to become too rich due to neglect, the unburned surplus will enter and burn in the catalytic converter, overheating the element and eventually destroying the converter. ¡ 60 Remove the fuel injector unit as described previously. 61 Drain the cooling system as described in Section 8 of this Chapter. 62 Detach the coolant hose and coolant temperature sensor from the inlet manifold. 63 Unbolt and remove the accelerator cable/throttle linkage support bracket from the top of the inlet manifold. The cable can be left attached to the bracket. 13 9D.69 Lambda sensor in exhaust downpipe 9D.71 Exhaust downpipe to manifold flange connection showing retaining nuts and locktabs 13•78 Supplement: Revisions and information on later models c) If the engine develops a misfire, do not drive the car at all (or at least as little as possible) until the fault is cured - the misfire will allow unburned fuel to enter the converter, which will result in its overheating, as noted above. d) DO NOT push- or tow-start the car - this will soak the catalytic converter in unburned fuel, causing it to overheat when the engine does start - see b) above. e) DO NOT switch off the ignition at high engine speeds - if the ignition is switched off at anything above idle speed, unburned fuel will enter the (very hot) catalytic converter, with the possible risk of its igniting on the element and damaging the converter. f) DO NOT use fuel or engine oil additives these may contain substances harmful to the catalytic converter. g) DO NOT continue to use the car if the engine burns oil to the extent of leaving a visible trail of blue smoke - the unburned carbon deposits will clog the converter passages and reduce its efficiency; in severe cases the element will overheat. h) Remember that the catalytic converter operates at very high temperatures and the casing will become hot enough to ignite combustible materials which brush against it. DO NOT, therefore, park the car in dry undergrowth, over long grass or piles of dead leaves. i) Remember that the catalytic converter is FRAGILE - do not strike it with tools during servicing work, take great care when working on the exhaust system, ensure that the converter is well clear of any jacks or other lifting gear used to raise the car and do not drive the car over rough ground road humps, etc., in such a way as to ground the exhaust system. j) In some cases, particularly when the car is new and/or is used for stop/start driving, a sulphurous smell (like that of rotten eggs) may be noticed from the exhaust. This is common to many catalytic converter-equipped cars and seems to be due to the small amount of sulphur found in some petrols reacting with hydrogen in the exhaust to produce hydrogen sulphide (H2S) gas; while this gas is toxic, it is not produced in sufficient amounts to be a problem. Once the car has covered a few thousand miles the problem should disappear - in the meanwhile a change of driving style or of the brand of petrol used may effect a solution. k) The catalytic converter, used on a well-maintained and well driven car, should last for at least 50 000 miles (80 000 km) or five years - from this point on, careful checks should be made at all specified service intervals on the CO level to ensure that the converter is still operating efficiently - if the converter is no longer effective it must be renewed. Fuel evaporation control system - general 76 As mentioned earlier, fuel evaporation is contained within the system. In high outdoor temperatures, when the vehicle is parked for a period of time, the fuel in the tank evaporates, building up pressure. When the pressure builds up to a predetermined level a vent valve opens to allow the vapours to pass on to and absorbed by a carbon filter. However, if extreme pressure or vacuum should build up, a two way safety valve opens to allow external venting. 77 If the safety valve needs replacing, note that it must be fitted correctly. The black end should be connected to the fuel tank and the blue to the carbon filter. 78 The vapours in the carbon filter are flushed by warm air passing through the filter on to a ECU controlled vapour cut-off solenoid. 79 The cut-off solenoid is closed when starting the engine and opens to allow vapours to be drawn into the inlet manifold, through a second solenoid. If the cut-off solenoid needs replacing ensure that the black arrow on the casing is pointing towards the inlet manifold. 80 The second solenoid, known as an Elbi solenoid, is closed when the engine is turned off, thus preventing engine run-on. The side facing connection is for the inlet manifold pipe. PART E: BOSCH L3.1/2 JETRONIC FUEL INJECTION SYSTEMS Warning: Refer to the beginning of this Section before starting any work. Description 1 A Bosch L3.1 (or L3.2, as fitted from 1992) Jetronic fuel injection system is fitted to the 1372 cc Turbo ie engine. The system circuit and main component locations are shown in Figs. 13.48 and 13.49. 2 The L3.1/2 Jetronic system is a multi-point fuel injection (MPi) system. It operates in a similar manner to that of the LE2-Jetronic system fitted to the 1301 cc Turbo ie engine described in Part C of this Section. The L3.1/2 system is more sophisticated and has the ability to provide reasonably efficient engine operation when system sensors malfunction. As with the LE2 system, the fuel and air supply mixture circuits are regulated in accordance with the electronic control unit (ECU), but on the L3.1/2 system the control unit is attached to the upper part of the airflow meter. 3 The ECU analyses the information passed to it from the system sensors. These signals are then processed and the air/fuel mixture is constantly adjusted as required to provide the Fig. 13.48 Bosch L3.1 Jetronic fuel injection system - 1372 cc Turbo ie engine (Sec 9E) 1 ECU 1A Diagnostic socket 2 Injection system relay and fuel pump relay 3 Ignition switch 4 Battery 5 Fuel tank 6 Fuel pump 6A Primary fuel filter 7 Coolant temperature sensor 8 Intake air cooling radiator (intercooler) 9 Air cleaner 10 Supplementary air valve 11 Throttle position switch 11A Throttle housing 12 Airflow meter 12A Intake air temperature sensor 13 Fuel pressure regulator 14 Fuel rail (to injectors) 15 Secondary fuel filter 16 Injectors 17 Injector cooling fan 18 Thermostatic switch (to engage injector cooling fan) Supplement: Revisions and information on later models 13•79 optimum engine operating efficiency. In the event of a system sensor malfunction, errors in data passed to the ECU are overcome by an emergency operation, whereby the ECU supplies the injectors with one of two set injection periods independent of the sensors. One period (2.2 ms) is for idle speed and the other (2.5 ms) is for speeds above idle (actuated when the idle speed contact is opened). 4 An injection system relay and a fuel pump relay are fitted and are located in the engine compartment, adjacent to the ECU on the lefthand inner wing panel. In the event of the engine not being started within two seconds of the ignition being switched to the “ON” position, the fuel pump relay is deactivated. The fuel pump circuit fuse is located in the main fuse block located under the facia within the car. Note: To avoid possible damage to the ECU, it is essential that the ignition is switched off before disconnecting (or connecting) the wiring multi-plug from the ECU. A Lambda (or oxygen) sensor is fitted to L3.2 equipped models, to measure exhaust gas oxygen content. In sending signals to the ECU, optimum catalyst operation is maintained. Fuel system depressurisation ¡ 5 The fuel system should always be depressurised whenever any fuel hoses and/or system components are disconnected and/or removed. This can easily be achieved as follows. 6 The fuel pump relay is located next to the ECU and airflow meter in the engine compartment. Carefully pull free the fuel pump relay, then start the engine and run it until it stops. The fuel system is now depressurised. Turn the ignition off before removing/dismantling any components. 7 Do not refit the fuel pump relay or turn the ignition on until the system is fully reconnected. When the engine is ready to be restarted, refit the relay and its cover, then restart the engine in the normal manner. Maintenance ¡ 8 Regularly check the condition and security of the system hoses and connections. Also check the system wiring connections for condition and security. Fig. 13.49 Fuel injection system components layout in engine compartment on the 1372 cc Turbo ie engine (Sec 9E) 1 ECU 1A Diagnostic socket 2 Ignition system relay and fuel pump relay 7 Coolant temperature sensor 10 Supplementary air valve 11 Throttle position switch 11A Throttle housing 12 Airflow meter 13 Fuel pressure regulator 15 Secondary fuel filter 9 At the specified intervals, renew the air cleaner element and the fuel filter. Fuel filter - renewal ¡ 10 This is located in the engine compartment on the right-hand side. Disconnect the fuel inlet and outlet hoses, but be prepared for the loss of fuel. Loosen off the clamp and remove the filter. 11 Reverse the removal procedure to fit the new filter, but ensure that the arrow indicating fuel flow is pointing towards the fuel injector rail. Air cleaner element renewal 16 Injectors 17 Injector cooling fan 18 Thermostatic switch (to engage injector cooling fan) 13 Wipe clean the inside surfaces of the air cleaner housing, then insert the new element, refit the cover and secure it with the four retaining clips. Checks and adjustments ∞ Engine idle speed and mixture adjustment 14 Before carrying out any adjustments, the engine must be at its normal operating temperature, the cooling fan having cut into ¡ 12 Prise free the four retaining clips, then remove the cover and the air cleaner element. 13 Fig. 13.50 Secondary fuel filter with arrows indicating direction of flow - 1372 cc Turbo ie engine (Sec 9E) Fig. 13.51 Air cleaner cover securing clips (arrowed) on the 1372 cc Turbo ie engine (Sec 9E) Fig. 13.52 Idle speed adjustment screw (1) on the 1372 cc Turbo ie engine (Sec 9E) Note method of compressing the supplementary air valve pipe (arrowed) 13•80 Supplement: Revisions and information on later models the pump fuse is sound and that its connection (and also that the relay) are clean and secure. 24 The pump can be further checked as described previously for the LE2 fuel injection system fuel pump in Part C of this Section. Supplementary air valve check 25 With the engine at its normal operating temperature, allow it to idle, then pinch the supplementary air valve hose using suitable pliers as shown in Fig. 13.52 and check to see if the engine speed drops by more than 50 rpm. If it does, the supplementary air valve is defective and in need of renewal. Fig. 13.53 Mixture adjustment screw location on the 1372 cc Turbo ie engine (Sec 9E) operation twice. Also prior to making adjustments ensure that the supplementary air valve pipe is in good condition, with no leaks. Compress the air valve pipe using a pair of grips to prevent incorrect adjustment caused by a defective supplementary air valve. 15 The air cleaner must be connected when checking and/or adjusting the engine idle speed. To adjust, turn the adjuster screw in the required direction to set the engine idle speed to that specified. 16 It is unlikely that the mixture will require adjustment and unless this is proven by measuring the exhaust gases using a CO content analyser, its setting should not be altered. As with idle speed adjustment, the engine must be at its normal operating temperature when making this check and adjustment. It is also necessary to ensure that the ignition idle advance is as specified. Checking and adjustment must not be made with the engine cooling fan, air conditioning (where fitted) or other related items switched on. 17 If adjustment to the mixture is required, prise free the tamperproof plug from the front of the mixture adjustment screw in the control unit, then turn the screw as required. Turn the screw inwards (clockwise) to increase the CO content or outwards (anti-clockwise) to weaken it. Fig. 13.54 Accelerator cable adjustment on the 1372 cc Turbo ie engine (Sec 9E) 1 Adjuster 2 Inner cable 3 Quadrant support Accelerator cable adjustment 20 If the accelerator cable is removed or detached from the support bracket at the throttle control housing at any time, care must be taken to adjust it correctly. When the inner cable is connected to the throttle quadrant, set the outer cable in the bracket so that the inner cable has a minimal amount of free play, yet does not prevent the throttle valve from fully closing. 21 When the engine is restarted, check that the engine idle speed is as specified and that the action of the accelerator is satisfactory. Fuel pump and supply system checks 22 Although the following basic checks can be made to the fuel pump and fuel supply system, specialised equipment is required to undertake full and accurate tests of the fuel supply system. Such checks must therefore be entrusted to a FIAT dealer or a fuel injection specialist. 23 If the fuel pump is suspected of malfunction, a basic check can be made by turning the ignition on and listening around the area of the pump unit to hear if it is operating. The pump is located on the underside of the car, just forward of the fuel tank. If the pump fails to operate, check that Injection system components removal and refitting ¡ Warning: Refer to the beginning of this Section before starting any work. 26 With the exception of the items mentioned below, the various components of the fuel injection system are removed in the same manner as that described for the equivalent items in Part C of this Chapter. 27 Disconnect the battery negative lead before carrying out any of the removal and refitting operations. Where fuel lines are to be disconnected it will first be necessary to depressurise the injection system. Airflow meter 28 Release the retaining clips and detach the air intake and outlet ducts from the airflow meter. 29 Ensure that the ignition is switched off, then disconnect the multiplug from the ECU. Unscrew the retaining bolts and remove the airflow meter complete with the ECU. 30 If required, the ECU can be separated from the airflow meter by undoing the securing bolts. Throttle valve housing/inlet manifold 31 Loosen off the retaining clip and detach the air intake duct from the throttle housing, the air cooling hoses for the injectors and the supplementary air valve. 32 Detach the accelerator cable from the throttle linkage. Throttle position switch adjustment 18 This switch will not normally require adjustment having been set during production. The switch should not be loosened off or reset unless absolutely necessary. 19 If a new switch is fitted it can be set by loosely fitting the securing bolts, turning the switch fully anti-clockwise, then clockwise until one of the internal contacts is felt to click into engagement. Hold the switch in this position and tighten the retaining screws. Reconnect the wiring multiplug to the switch. Fig. 13.55 Disconnecting the air intake duct and accelerator cable from the throttle housing on the 1372 cc Turbo ie engine (Sec 9E) Fig. 13.56 Disconnecting the injector air cooling hoses and the supplementary air valve hose on the 1372 cc Turbo ie engine (Sec 9E) Supplement: Revisions and information on later models 13•81 Fig. 13.59 Disconnecting the earth leads (arrowed) on the 1372 cc Turbo ie engine (Sec 9E) Fig. 13.57 Detach the vacuum pick-up pipes from the points arrowed on the 1372 cc Turbo ie engine (Sec 9E) Fig. 13.58 removing the inlet manifold mounting bracket from the cylinder head on the 1372 cc Turbo ie engine (Sec 9E) 33 Detach the vacuum pick-up pipes from the points indicated in Fig. 13.57. 34 Detach the wiring connector from the throttle position switch. 35 Unscrew and remove the inlet manifold mounting bracket-to-cylinder head retaining bolt shown in Fig. 13.58. 36 Unscrew and remove the injector cable shield retaining screws. Detach the cables from the injectors. 37 Disconnect the earth leads and the air intake sensor lead shown in Fig. 13.59. 38 Release and withdraw the injector cable shield from the left-hand underside of the throttle housing. 39 Unscrew and detach the injector fuel supply pipe and disconnect the fuel pressure regulator pipe from its inlet manifold union. 40 Disconnect the injector cooling fan thermostatic switch lead. 41 Unscrew the securing bolts and remove the fuel pressure regulator. 42 Unscrew and remove the heat shield-to-exhaust manifold retaining bolts. Unscrew the retaining bolts at the rear and withdraw the heat shield. 43 Undo the inlet manifold retaining bolts/nuts and carefully withdraw the manifold/throttle housing. Remove the gasket from the mating face. 45 Disconnect the fuel supply line from the fuel rail. 46 Disconnect the fuel return line from the base of the fuel pressure regulator. Unbolt and remove the pressure regulator from the fuel rail. 47 Unscrew and remove the injector cable shield retaining screws. Detach the cables from the injectors. 48 Disconnect the fuel rail/injector unit and withdraw the fuel rail, together with the injectors, from the engine. 49 With the injectors and the fuel rail removed, one or more injectors can be removed and renewed as described below. Note that the connecting hoses will be destroyed during removal and these together with the injector seals will therefore need to be renewed. Injectors and fuel rail 44 Depressurise the system as described previously. Injector(s) and connecting hoses 50 Remove the injectors and the injector fuel rail as described in the previous sub-Section and secure the fuel rail in a vice, but do not overtighten. 51 Cut free the hose between the fuel rail and the injector. Make the cut in-line with the hose and cut the hose as close as possible to the fuel rail connection, then pull the hose free from its retaining cap. Once the hose is detached, the retaining cap is released. 52 Repeat the procedure and release the hose and its retaining cap from the injector. 53 Whether or not the injector unit itself is to be renewed, the injector O-ring seals must always be renewed when disturbed. 54 Check that the connections of the fuel rail and the injector are clean, then push the new injector with retaining cap onto the new hose. Ensure that the hose is fully located in the retaining cap. 55 Check that the fuel rail-to-hose retaining cap is located on the connector, then push the other end of the injector hose over the fuel rail connector. Ensure that the hose is fully located in the retaining cap. 56 The interconnecting hose between the fuel rail sections can be removed and renewed in the same manner as that described above for the injector hoses. Electronic control unit (ECU) 57 The ECU is mounted on the top face of the airflow meter. Ensure that the ignition is switched off before disconnecting the multiplug from the ECU. Disconnect the wiring multiplug connector by compressing the tag and pulling the connector free from the unit. Undo the retaining screws and remove the ECU from the airflow meter. Handle the unit with care and if removed for an extensive period, store it in a safe place where it will not get knocked or damaged. Fuel pump - removal and refitting 58 Depressurise the fuel system as described previously. 59 Raise the car at the rear and support it on axle stands. Detach and remove the 3 13 1 2 Fig. 13.60 Disconnecting the injector fuel supply pipe and fuel pressure regulator pipe on the 1372 cc Turbo ie engine (Sec 9E) Fig. 13.61 Cutting free the hose from an injector on the 1372 cc Turbo ie engine (Sec 9E) 3 Fig. 13.62 ECU (1) wiring multiplug (2) and tag (3) - 1372 cc Turbo ie engine (Sec 9E) 13•82 Supplement: Revisions and information on later models are securely and correctly made. 63 Do not reconnect the battery until all the refitting procedures are complete. 64 When the engine is restarted, check around the fuel injection system for any signs of leakage from the fuel supply and return components. Lambda sensor - general Fig. 13.63 Fuel pump and sender unit location on the 1372 cc Turbo ie engine (Sec 9E) 1 2 3 4 Fuel level gauge sender connector Fuel pump connector Fuel return hose Fuel supply hose protective shield to gain access to the pump which is located forward of the fuel tank. 60 Disconnect the fuel hoses and the wiring connector, release the retaining clamp and withdraw the pump unit. Refitting all components 61 Refitting of all components is a reversal of the removal procedure, but note the following specific points. 62 Ensure that all components are clean prior to refitting and where applicable, use new seals and gaskets. Ensure that all connections 9F.5 Maximum air pressure switch (arrowed) 9F.14 Alternator heat shield 65 The sensor is screwed into the exhaust in front of the catalytic converter. 66 A faulty sensor can damage the converter, therefore it must be checked regularly (see Maintenance schedule, Section 3) by a dealer using special equipment. 67 Use of leaded fuel will also damage this sensor, as well the converter. PART F: TURBOCHARGER SYSTEM Description 1 A turbocharger is fitted to certain 1301 and 1372 cc ie engines. The accompanying photographs are all taken from a 1301 cc engine, but the system is much the same for both engine types. 2 The turbocharger is basically a shaft with an exhaust gas-driven turbine at one end, and a compressor located at the other end which draws in outside air and forces it into the inlet manifold. By compressing the incoming air, a larger charge can be let into each cylinder, and greater power output is achieved than with normal aspiration. 9F.7 Bypass valve 9F.16A Turbocharger-to-exhaust flange nut (arrowed) 3 Lubrication of the turbocharger shaft bearings is provided by pressurised engine oil, and the unit is cooled by the coolant from the engine cooling system. 4 A wastegate valve is incorporated in the turbocharger to divert excessive exhaust gas pressure from the turbine into the exhaust pipe at a predetermined pressure level. 5 A maximum air pressure switch is located in the inlet manifold. Its purpose is to cut the ignition system off when the turbocharger system pressure continues to increase beyond 0.86 bars (12.5 lbf/in 2). This would otherwise damage the engine, due to high combustion temperatures and pressures (photo). 6 An intercooler (heat exchanger) is located between the turbocharger and the inlet manifold. Its function is to cool the inlet charge, thus increasing its density, to provide greater power output. 7 A mechanical bypass valve is located between the low-pressure pipe (downstream) and the high-pressure pipe (upstream), which reduces the inherent noise from the turbocharger when the accelerator pedal is released (photo). 8 None of the components of the turbocharger system can be repaired and parts are not available. Any fault will therefore mean that the turbocharger or associated assemblies will have to be renewed complete. Precautions 9 The following precautions should be observed when using a turbocharged vehicle. a) Never operate the engine without the air cleaner fitted. b) Never switch off the engine before its speed has dropped to idling. If the car has been driven hard, allow it to idle for a few minutes before switching off. Failure to observe these recommendations can cause damage to the turbocharger due to lack of lubrication. 10 Always keep the fuel injection system well-maintained and tuned. Operating on a weak mixture can cause overheating of the turbocharger. Turbocharger (1301 cc ie engine) removal and refitting ¡ 11 Disconnect and remove the airflow meter as described in Section 9C. 12 Disconnect the spiral-wound hose from the fuel injector cooling duct. 13 Remove the turbocharger air hoses from within the left-hand side of the engine compartment. Note particularly their routing. 14 Remove the throttle housing/inlet manifold as described in Section 9C, also the fuel rail, injectors and inlet manifold branch pipe stubs. Remove the alternator heat shield (photo). 15 Remove the exhaust heat shield. 16 Unscrew the turbocharger-to-exhaust pipe flange nuts (photos). Supplement: Revisions and information on later models 13•83 9F.16B Unscrewing turbocharger-toexhaust manifold nut 17 Disconnect the air hoses from the turbocharger (photo). 18 Drain the cooling system, and then disconnect the coolant hoses from the turbocharger (photos). 19 Disconnect the oil feed pipe, which has a banjo-type union (photo). 20 Disconnect the oil return pipe which runs to the engine sump pan (photo). 21 Working underneath the car, disconnect the exhaust manifold support bracket (photo). 22 Unbolt the exhaust manifold and lift it out of the engine compartment, complete with turbocharger. 23 The turbocharger may now be unbolted from the exhaust manifold (photo). 24 Refitting is a reversal of removal, but use new gaskets and seals throughout. 9F.19 Turbocharging oil feed pipe 9F.17 Releasing turbocharger air hose clip Turbocharger (1372 cc ie engine) removal and refitting 9F.18A Releasing turbocharger coolant inlet union (arrowed) ¡ 25 Refer to Part E of this Section for details and remove the inlet manifold. 26 Drain the cooling system as described in Section 8 of this Chapter. 27 Unscrew the union bolt and disconnect the oil supply pipe from the turbocharger. 28 Loosen off the securing clip and detach the air hose from the turbocharger filter. 29 Raise and support the car at the front end on axle stands. 30 Working from underneath the car, unscrew the downpipe-to-exhaust system joint nuts then unscrew the retaining nuts and detach the exhaust downpipe from the turbocharger outlet flange. Remove the downpipe. 1 Exhaust connecting nut 2 Oil return hose 3 Coolant pipe union 9F.20 Turbocharger oil return pipe at sump 9F.21 Exhaust manifold support bracket 9F.18B Turbocharger connections 13 9F.23 Exhaust manifold bolts Fig. 13.64 Turbocharger oil supply pipe connection (arrowed) (Sec 9F) Fig. 13.65 Detach the air hose from the Turbocharger (arrowed) (Sec 9F) 13•84 Supplement: Revisions and information on later models Fig. 13.66 Turbocharger mounting bracket bolts (arrowed) (Sec 9F) Fig. 13.67 Disconnect the heat exchanger air hose and the oil return pipe (turbocharger-to-sump) (Sec 9F) Fig. 13.68 Turbocharger mounting bracket bolts removal (Sec 9F) Fig. 13.69 Turbocharger coolant pipe-topump bolt location (arrowed) (Sec 9F) 9F.40 Intercooler location (1301 cc engine) 9F.43 Intercooler mounting bolt (arrowed) on 1301 cc engine 31 Unscrew and remove the two turbocharger mounting bracket bolts. 32 Referring to Fig. 13.67, loosen off the retaining clip and detach the air hose from the heat exchanger and the oil return pipe from the turbocharger (to sump). 33 Working from above, undo the turbocharger mounting bracket bolts. 34 Unscrew and remove the coolant pipe-to-pump retaining bolts. The turbocharger can now be removed from above by withdrawing it together with the exhaust manifold from the engine compartment. 35 Locate and support the exhaust manifold in a vice. Fit protector clamps to the jaws of the vice to avoid possible damage to the manifold. 36 Note the orientation and fitted position of the turbocharger mounting bracket, then unscrew the retaining nuts and detach the bracket. 37 Undo the retaining nuts, separate and remove the exhaust manifold from the turbocharger. 38 The turbocharger and wastegate valve are not repairable and must therefore be renewed as a complete unit. This being the case, remove the following ancillary items from the turbocharger unit before renewing it. a) Loosen off the retaining clip and remove the air outlet hose from turbocharger. b) Undo the two retaining bolts and remove the oil return hose union. c) Unscrew the union and bolt and coolant inlet pipe. d) Undo the retaining nuts and remove the turbocharger-to-exhaust manifold connector. 39 Where applicable, always use new gaskets and ensure that the mating faces are clean before refitting the ancillary components to the turbocharger. Intercooler removal and refitting Injector cooling fan removal and refitting Difficult starting from cold Difficult to start when hot m m m m m Choked air cleaner element m Fuel pump fault Excessive fuel consumption m m m m Incorrect mixture setting Dirty air cleaner element Coolant temperature sensor fault Airflow sensor fault Uneven idling m m m m ¡ 44 This unit is located on the left-hand side at the front of the car. It can be accessed for removal from above, in the engine compartment. 45 Detach and remove the air intake duct from the air cleaner unit to the ECU/airflow meter. 46 Disconnect and remove the air duct from the air blower unit. 47 Undo the air blower retaining nuts, withdraw the unit and detach its wiring connector. Fault finding - fuel injection system Fuel pump fault Blocked fuel pipe or filter Supplementary air valve fault Coolant temperature sensor fault ¡ 40 The intercooler is mounted behind the left-hand side of the front bumper/spoiler (photo). 41 Disconnect the air ducts from the intercooler. 42 Unscrew the mounting bolts and lift the intercooler from the car. 43 Refitting is a reversal of removal (photo). Incorrect mixture setting Intake system air leak Throttle position switch out of adjustment Loose ECU connector Supplement: Revisions and information on later models 13•85 Fault finding - turbocharger system Noise or vibration Power loss/indicated boost pressure too low m m m m m m m m m m Worn shaft bearings Lack of lubrication Inlet or exhaust manifold leaking Out-of-balance impeller shaft Engine “pinking” m m m m High boost pressure, caused by faulty wastegate valve Fuel octane rating too low Faulty TDC sensor (ignition advanced) Incorrect spark plugs or plug gaps, or spark plugs worn Turbocharger leaking, or leak at turbocharger mounting Incorrectly adjusted wastegate valve/wastegate valve not closing Blocked exhaust pipe Clogged air cleaner element Faulty TDC sensor (ignition retarded) Turbo/intercooler connecting hose leaking Oil leaks from shaft oil seals, with blue exhaust fumes m Oil return pipe blocked m Air cleaner element clogged m Worn oil seals Indicated boost pressure too high m Faulty wastegate valve m Ice forming in exhaust pipe (during very cold weather) 10 Ignition system General 1 The ignition systems dealt with in this Section are all fully electronic and are referred to individually according to type as the “breakerless”, Microplex and Digiplex 2 system. The Microplex system is used on the 1301 and 1372 cc Turbo ie engines, the Digiplex 2 on the 1372 cc ie engine and the “breakerless” system on all other models. Ignition timing (all later models) # 10.2A Flywheel timing marks (999 cc engine) 2 The ignition timing check on all systems covered in this Section is made using a stroboscope, connected up in accordance with the manufacturer’s instructions and pointed at one of the two positions given below (photos). a) The timing marks on the crankshaft pulley and the timing cover. The right-hand underwing shield will need to be detached and removed to allow access to view these marks (see photos 7B.27 and 7B.30B in this Chapter). b) The timing marks on the flywheel and the clutch housing. The rubber plug will need to be extracted for access to these marks. 3 A dwell angle check is not possible on any of these systems. 4 When making the stroboscopic ignition timing check it is necessary to disconnect the vacuum hose from the distributor or inlet manifold to module (as applicable) and plug it. The engine must be at its normal operating temperature and running at the normal specified idle speed when making the check. Refer to the appropriate part of the Specifications at the start of this Chapter for the idle speed and ignition settings. Breakerless ignition system description 5 On 903 cc engines, the distributor is driven from an extension of the oil pump driveshaft which is geared to the camshaft. 10.2B Flywheel timing marks (1372 cc ie engine) 13 Fig. 13.70 Breakerless ignition system - 999 and 1108 cc engines (Sec 10) 1 2 3 4 Battery Ignition switch Ignition coil Coil HT lead 5 6 7 8 Distributor ECU LT cables Vacuum advance unit 9 Spark plug HT leads 10 Spark plugs 11 Vacuum hose 13•86 Supplement: Revisions and information on later models Fig. 13.72 Rotor aligned with arrow on distributor dust shield - 999 and 1108 cc engines (Sec 10) Fig. 13.71 Location of electronic ignition components on early models with breakerless ignition (Sec 10) 1 2 3 4 ECU Ignition coil Distributor Vacuum advance unit 5 Pick-up filter with calibrated opening for atmospheric pressure 6 On 999, 1108 and 1372 cc engines, the distributor is driven from the rear end of the camshaft. 7 On the 1116 and 1299/1301 cc engines, the distributor is driven from an extension of the oil pump driveshaft which is geared to the auxiliary shaft. 8 The distributor contains a reluctor mounted on its shaft, and a magnet and stator fixed to the baseplate. 9 Ignition advance is controlled in the conventional way mechanically by centrifugal weights and a diaphragm unit for vacuum advance. 10 Instead of the conventional method of interrupting the low tension circuit to generate high tension voltage in the coil by means of a mechanical contact breaker, when the electronic ignition is switched on, the switching of the transistors in the electronic control unit (ECU) prevents current flow in the coil primary windings. 11 Once the crankshaft rotates, the reluctor moves through the magnetic field created by the stator and when the reluctor teeth are in alignment with the stator projections a small AC voltage is created. The ECU amplifies this voltage and applies it to switch the transistors and so provide an earth path for the primary circuit. 12 As the reluctor teeth move out of alignment with the stator projections the AC voltage changes, the transistors in the ECU are switched again to interrupt the primary circuit earth path. This causes a high voltage to be induced in the secondary winding. Distributor (breakerless type) removal and refitting # 13 Removal of the distributor on the 903, 1116, 1299 and 1301 cc engines is as described in Chapter 4, Section 6. 14 On 999, 1108 and 1372 cc engines, mark the position of the distributor clamp plate in relation to the cylinder head surface. 15 Unclip the distributor cap and move it to one side with the HT leads attached. 16 Disconnect the LT lead plug and, where applicable, the vacuum hose (photo). 17 Unscrew the distributor fixing nuts and withdraw the unit. 18 The distributor drive is by means of an offset dog no special procedure is required to refit it. Providing the dog engages in its slot and the distributor body is turned to align the marks made before removal, the timing will automatically be correct. 19 If a new distributor is being fitted (body unmarked), set No. 4 piston at TDC (0º) by turning the crankshaft pulley bolt until the timing marks on the crankshaft pulley and engine front cover are in alignment. 20 Align the drive dog and fit the distributor then turn the distributor body until the contact end of the rotor is aligned with the arrow on the distributor dust shield. 21 Tighten the distributor clamp nuts. Refit the cap and disconnected components and then check ignition timing using a stroboscope. Distributor (breakerless type) - overhaul # 22 It is recommended that a worn out or faulty distributor is renewed. However, individual components such as the cap, rotor, reluctor, magnet/stator/baseplate assembly, vacuum diaphragm unit, and drive gear or dog are available separately. Breakerless ignition system components - testing ™ 23 A voltmeter and an ohmmeter will be required for this work. Primary circuit voltage 24 Turn on the ignition, and using a voltmeter check the voltage at the ignition coil LT terminals. Any deviation from battery voltage will indicate a faulty connection, or if these are satisfactory, then the coil is unserviceable. 10.16 Distributor LT lead connecting plug Magnetic impulse generator winding 25 Remove the distributor and ECU and disconnect their connecting leads. 26 Connect an ohmmeter to the impulse generator terminals and note the reading. The resistance should be as given in the Specifications at the beginning of this Chapter. 27 Now check between one of the impulse generator terminals and the metal body of the distributor. Infinity should be indicated on the ohmmeter. If it is not, renew the impulse generator carrier plate. Note: When carrying out this test it is imperative that the connections are remade as originally observed. Also ensure that there is no possibility of the ECU supply (red) cable and earth cable making contact in service. Ignition coil winding resistance 28 Check the resistance using an ohmmeter between the coil LT terminals. Refer to the Specifications for the expected coil resistance. 29 Check the resistance between the LT lead socket on the coil and each of the LT terminals. Refer to the Specifications for the expected coil resistance. 30 The rotor arm resistance should be approximately 5000 ohms. Microplex ignition system description 31 This system is fitted to the 1301 and 1372 cc Turbo ie models, and comprises the following components. Electro-magnetic sensors 32 Two sensors are used to pick up engine speed and TDC position directly from the crankshaft. Pressure and vacuum sensor 33 This converts inlet manifold vacuum pressure into an electrical signal for use by the electronic control unit (ECU). Anti-knock sensor 34 This converts “pinking” detonations which occur within the combustion chambers into an electrical signal for use by the ECU (photo). Electronic Control Unit (ECU) 35 This computes the optimum ignition advance angle from the sensor signals received, and controls the action of the ignition unit (photo). Supplement: Revisions and information on later models 13•87 10.34 Anti-knock sensor Fig. 13.75 Microplex ignition system components on the 1301 cc Turbo ie engine (Sec 10) 10.35 Ignition ECU on rear bulkhead (1301 cc Turbo ie engine) 1 ECU 2 Safety pressure switch 3 Ignition unit and coil 4 Distributor 5 Anti-knock sensor S1 TDC sensor S2 Engine speed sensor 1 Battery 2 Ignition switch 3 Ignition coil with control unit 4 ECU 5 Distributor 6 Anti-knock sensor 7 Air pressure switch 8 Engine speed sensor 9 TDC sensor 10 Tachometer 13 Fig. 13.76 Microplex ignition system components on the 1372 cc Turbo ie engine (Sec 10) 13•88 Supplement: Revisions and information on later models Fig. 13.73 Wiring diagram of the Microplex ignition system on the 1301 cc Turbo ie engine (Sec 10) 1 2 3 4 5 6 ECU Safety pressure switch Ignition unit with coil Distributor Anti-knock sensor Vacuum/pressure pick-up in engine inlet manifold 7 Socket for diagnostic equipment 8 Tachometer 9 Spark plugs 10 Switch to earth (to retard advance curve if necessary) 11 Turbocharger operation warning light 12 Anti-theft relay (where fitted) 13 Hidden anti-theft switch (where fitted) Fig. 13.74 Wiring diagram of the Microplex ignition system on the 1372 cc Turbo ie engine (Sec 10) 1 ECU 2 Pipe (pressure/vacuum in inlet manifold to control unit) 3 Spark plug 4 Distributor 5 Ignition coil (with control unit) 6 7 8 9 10 11 12 Tachometer Ignition switch Connector TDC sensor Engine speed Anti-knock sensor Air pressure safety switch 13 Speedometer signal for electronic injection 14 Connector 15 Diagnostic socket a Crankshaft pulley b Flywheel Supplement: Revisions and information on later models 13•89 10.36 Ignition coil (1) and power module (2) on 1301 cc Turbo ie engine Ignition unit 36 This comprises four elements (photo). a) Power module - receives the ignition advance command and controls the conduction angle of the primary current and energy stored in the coil. b) Dissipater plate - eliminates the heat which is generated by the high volume of current. c) Ignition coil with low primary resistance. d) Distributor - a means of distributing high tension to the spark plugs. The rotor is driven in an anti-clockwise direction (viewed from transmission) by a dog on the end of the camshaft. 37 The system incorporates a safety pressure switch, which cuts out the ignition if the turbocharging pressure exceeds a value of between 0.84 and 0.93 bars (12.2 and 13.5 lbf/in2) above atmospheric pressure. Distributor (Microplex) removal and refitting # 38 Remove the distributor cap and place it to one side, complete with spark plug leads (photo). 39 Turn the crankshaft by means of the pulley nut, or by raising and turning a front wheel with top gear engaged, until No. 4 piston is on its firing stroke. This will be indicated when the contact end of the rotor 10.38 Removing the distributor cap arm is aligned with the mark on the distributor body rim, and the lug on the crankshaft pulley is aligned with the timing pointer on the engine. The right-hand underwing shield will have to be removed in order to see the marks (photo). 40 Unscrew the distributor fixing nuts and withdraw the distributor. 41 When fitting the distributor, the offset drive dog will automatically locate the distributor rotor in its correct position, but the distributor body may require rotating in order to align the rim mark with the rotor. The elongated slots for the fixing studs are to permit initial alignment, not for subsequent adjustment, as advance angle alterations are carried out automatically by the system ECU (photos). 42 Tighten the nuts and refit the cap with leads. 43 Unless a stroboscope and a vacuum pressure gauge are available, it will not be possible to check the advance values with the engine running. Where these instruments are available, connect the vacuum gauge to the inlet manifold, and the stroboscope in accordance with the equipment manufacturer’s instructions. Refer to Fig. 13.79 according to the inlet manifold vacuum pressure indicated. 10.39 Crankshaft pulley timing marks (arrowed) Microplex ignition system components - testing ™ 44 An ohmmeter and a voltmeter will be required for these tests. 45 Remove the multipin plug from the ECU. Engine speed sensor 46 Insert the probes of an ohmmeter between terminals 3 and 16 of the multipin connector; 618 to 748 ohms (1301 cc) or 578 to 782 ohms (1372 cc) should be indicated. 47 If necessary, carry out a check of the gap between the sensor and flywheel teeth as described in Chapter 4, Section 10. 10.41A Distributor body showing elongated slots in the mounting lugs 13 10.41B Distributor drive dog Fig. 13.77 Crankshaft pulley timing mark aligned with timing pointer - Microplex ignition system (Sec 10) 1 TDC sensor Fig. 13.78 Rotor aligned with distributor body rim mark - Microplex ignition system (Sec 10) 13•90 Supplement: Revisions and information on later models Power module (1372 cc) 54 Proceed as described in paragraph 53. Anti-knock sensor 55 If “pinking” occurs, or loss of power is noticed, test the sensor by substitution of a new one. Ignition coil 56 Disconnect the leads from terminals 1 and 15 on the coil before testing. 57 Using the ohmmeter, check the resistance of the primary winding. This should be between 0.31 and 0.37 ohms (1301 cc) or 0.40 to 0.49 ohms (1372 cc), at an ambient temperature of 20ºC (68ºF). 58 The secondary winding resistance should be between 3330 and 4070 ohms (1301 cc) or 4320 to 5280 ohms (1372 cc), at an ambient temperature of 20ºC (68ºF). Distributor 59 Check the resistance of the rotor arm, which should be between 800 and 1200 ohms. 60 Where all the foregoing tests have proved satisfactory, then any problem must be due to a fault in either the power module or the ECU. These components can only be checked by the substitution of a new unit - power module first, then the ECU. Fig. 13.79 Ignition advance curves - Microplex ignition system on the 1301 cc Turbo ie (Sec 10) TDC sensor 48 Insert the probes of the ohmmeter between terminals 1 and 2 of the multipin connector; 618 to 748 ohms (1301 cc) or 578 to 782 ohms (1372 cc) should be indicated. 49 If necessary, carry out a check of the gap between the sensor and the crankshaft pulley, as described in Chapter 4, Section 10. ECU supply 50 Switch on the ignition, and then insert the probes of a voltmeter between terminals 13 and 11 of the multipin connector. Battery voltage should be indicated. If not, check the battery earth, ignition switch or intermediate connector plug for security. Power module supply (1301 cc) 51 Pull the multipin plug from the power module, and connect the probes of a voltmeter between terminal 4 of the connector and earth. If the reading is less than battery voltage, check the security of all connections between the ignition switch and terminal + 15 of the ignition coil. 52 Reconnect the multipin connector to the ECU, but have the one from the power module disconnected, and then switch on the ignition. 53 Connect the voltmeter between terminals 4 and 2 of the power module multipin connector. If the indicated voltage is less than battery voltage, check the security of all connections between the ignition switch and terminal + 15 of the ignition coil, and the battery earth. If all are satisfactory, check for continuity between terminals 11 and 12. If continuity is broken, renew the ECU. Safety pressure switch 61 The device protects the engine from excessive turbocharging pressure, cutting off the ignition by earthing the Microplex ECU. Testing is not possible without a special pressure pump, so the easiest way to check a suspected fault is to fit a new unit. Digiplex 2 ignition system description 62 This system operates in a similar manner to that of the earlier type described in Chapter 4, but the circuit layout differs to suit the Mono Jetronic fuel injection system. In operation, the main difference is that the Digiplex 2 system has a greater number of Fig. 13.80 Microplex ignition system ECU multipin connector (Sec 10) Fig. 13.81 Microplex ignition system control unit connection (Sec 10) For colour code, see main wiring diagrams For colour code, see main wiring diagrams Supplement: Revisions and information on later models 13•91 1 Connection point (lines connected to the intake manifold) 2 ECU 3 Ignition coil 4 Distributor 5 Engine flywheel (with five pins) 6 On/off switch (if fitted) for advance reduction 7 On/off switch 2 (if fitted) for curves 8 Battery 9 Spark plugs 10 Tachometer 11 Diagnostic socket 12 Engine speed and TDC sensor 13 To check actuator idle speed 14 To terminal no. 1 of injection control unit (rpm signal) Fig. 13.82 Digiplex 2 ignition system wiring circuits and components (Sec 10) advance points than the earlier system. Comparison of Fig. 13.82 with Fig. 4.2 illustrates the difference in layout. Note that the distributor is mounted on the rear end of the cylinder head and is driven by the camshaft. 63 When working on the Digiplex 2 ignition system or associated components, the precautionary notes outlined in Section 9 of Chapter 4 must be adhered to. 64 As with the earlier system, test procedures possible on the Digiplex 2 system are restricted due to the need for specialised testing equipment. The following checks are possible, however, using a conventional test meter. Ignition coil check 65 To check the resistance of the coil’s primary windings, connect the probes of an ohmmeter between the positive terminal and the negative terminal as shown in Fig. 13.83, and check that the resistance reading at 18 to 28ºC is 0.45 ohms ± 10% (photo). 66 To check the resistance of the coil’s secondary windings, connect the probes of an ohmmeter between the positive terminal and the HT lead terminal as shown in Fig. 13.84. Check that the resistance reading at 18 to 28ºC (64 to 82ºF) is 4800 ohms ± 10%. Ignition timing check necessitates its renewal. The sensor is accurately positioned during manufacture and secured with tamperproof screws; it does not require any adjustment during servicing. If it is necessary to renew the sensor, a special gap setting tool is required and the task is therefore best entrusted to a FIAT dealer. 67 Refer to paragraph 2 in this Section. Engine speed and TDC sensor check 68 To check the resistance between the sensor and the ECU, detach the wiring connector (photo). Connect the probes of an ohmmeter to the connector terminals and check that the resistance reading is between 600 and 760 ohms at 20ºC (68ºF). If the reading is not as specified, the sensor must be renewed. 69 The gap between the sensor and the pins on the rear face of the flywheel must be between 0.2 and 0.8 mm. Any deviation outside of this clearance will be due to mechanical damage to the sensor and Fig. 13.83 Test connections for ignition coil primary windings check - Digiplex 2 ignition system (Sec 10) 13 10.65 Ignition coil and connections on the 1372 cc ie engine 10.68 ECU location on the 1372 cc ie engine Fig. 13.84 Test connections for ignition coil secondary windings check - Digiplex 2 ignition system (Sec 10) 13•92 Supplement: Revisions and information on later models 10.70 Ignition distributor and HT lead connections on the 1372 cc ie engine Distributor (Digiplex Z) removal and refitting # 70 Proceed as described in paragraphs 14 to 21. When refitting the distributor, ensure that the engine is still set at the TDC position. Engage the rotor arm into position on the shaft so that its lug engages in the slot in the top end of the drive spindle. Align the rotor arm with the reference slot on the edge of the distributor housing as shown in Fig. 13.85, then fit the distributor into position and secure with the retaining nuts (photo). As previously mentioned, the fine timing is made automatically through the ECU. 10.72 HT lead connecting sequence on the 1301 cc Turbo ie engine 72 The HT lead connection sequence to the distributor cap on the 999 and 1108 cc engines is shown in Fig. 13.86. That for the 1301 cc Turbo ie is as shown (photo). Fig. 13.85 Rotor arm must align with slot (1) in distributor housing when refitting distributor - Digiplex 2 ignition system (Sec 10) Spark plugs and HT leads general 71 Copper-cored spark plugs are now fitted to all models. The recommended types are given in the Specifications Section of this Supplement. Fig. 13.86 HT lead connections on distributor cap of the 999 and 1108 cc engines (Sec 10) Fault finding - Microplex ignition system Starter motor turns but engine will not start Engine firing on three cylinders m Excessive TDC sensor gap m Engine speed or TDC sensors short-circuited m Faulty ECU m ECU multipin contacts corroded m Defective ignition coil m Defective ignition switch m ECU terminal 8 cable faulty m Faulty spark plug m Distributor cap cracked m Faulty HT cable 11 Clutch ¡ Clutch pedal - adjustment (cable clutch) 1 The method of adjusting the clutch has been revised. 2 Fully depress the clutch pedal two or three times. 3 Using a suitable measuring stick placed in contact with the floor panel (carpet peeled back), measure dimension “X” in Fig. 13.87. This dimension must be taken between the centre of the pedal pad and the floor, first with Loss of power, excessive fuel consumption m TDC sensor incorrectly located m Fault in ECU advance angle facility the pedal in the fully depressed position, and then in the fully released position. 4 The dimension measured should fall within the range quoted in the Specifications for this Supplement. 5 Any adjustment which may be required should be carried out by slackening the locknut on the cable at the release lever (on top of the gearbox) and turning the adjusting nut. Tighten the locknut on completion. Hydraulic clutch - description 6 Some later models are fitted with an hydraulically operated clutch in place of the cable operated type. The main components of the system are a master cylinder, with separate hydraulic fluid reservoir, and the operating cylinder. The master cylinder is Fig. 13.87 Clutch pedal adjustment diagram - cable clutch (Sec 11) For dimension “X” , refer to Specifications Supplement: Revisions and information on later models 13•93 mounted in-line with and just forward of the clutch pedal. The operating cylinder is mounted within a housing on top of the transmission. The fluid reservoir is located in the engine compartment and is mounted on the left-hand side near the bulkhead. No settings or specific procedures are given by the manufacturer at the time of writing. Maintenance (hydraulic clutch) ¡ 7 Periodically check the fluid level in the reservoir. If the level has dropped, top it up with the specified fluid. The fluid level must not be allowed to drop below the MIN level mark on the side of the reservoir (photos). If the fluid level drops by a significant amount, it is indicative of a leak in the hydraulic circuit and this must therefore be traced and repaired at the earliest opportunity. 8 Inspect the fluid lines and connections for security and any signs of leaks. Clutch master cylinder removal, overhaul and refitting # 9 If the cylinder is to be dismantled, it will first be necessary to obtain a cylinder repair kit. Start by detaching and removing the trim panel from the underside of the facia on the driver’s side. 10 Place a suitable covering over the floor carpet to prevent staining in the event of fluid spillage. Clamp the fluid supply hose at the master cylinder end, then unscrew the retaining clip and detach the hose from the cylinder. Position the hose out of the way and with its end pointing up. 11 Detach the operating rod clevis from the brake pedal. 12 Unscrew and detach the hydraulic pipe to the operating cylinder from the master cylinder (photo). 13 Undo the two retaining nuts and withdraw the master cylinder. 14 To dismantle the cylinder, prise free and pull back the dust boot, extract the retainer and withdraw the operating rod. 15 Invert the cylinder and shake free the piston and seal assembly. If it is stuck inside the cylinder, apply moderate air pressure (from a foot pump) into the tail end and catch Fig. 13.88 Exploded view of the hydraulic clutch components (Sec 11) 1 2 3 4 Filler cap Fluid reservoir Hose Master cylinder 5 6 7 8 Cover Clip Bracket Hose the assembly in a clean cloth as it is ejected. 16 Remove the seals noting their orientation. Clean all components in methylated spirits or new hydraulic fluid. If the cylinder is damaged, scored or badly worn it must be renewed. The seals must always be renewed once they are removed. 17 Assemble the new seals to the piston and lubricate the cylinder, seals and piston assembly with new hydraulic fluid (of the specified type) before assembling them. Ensure that the seals are fitted the correct way round (as noted during removal). 18 Renew the dust boot, fit and secure the operating rod into position with the retainer, then refit the dust boot over the cylinder. 19 If the intake pipe connector was removed, this must be refitted using a new seal. 20 Refit the cylinder in the reverse order of removal. Connect and hand tighten the hydraulic pipe to the operating cylinder before fully tightening the cylinder securing nuts. The hydraulic pipe can then be fully tightened. 9 10 11 12 Operating cylinder Bracket Circlip Operating lever 21 Reconnect the fluid supply hose to the cylinder and tighten the retaining clip to secure. Release the clamp. 22 Top up the clutch fluid level in the reservoir then bleed the system as described later in this Section. Clutch operating cylinder removal, overhaul and refitting ¢ 23 If the cylinder is to be dismantled once it is removed, it will first be necessary to obtain a cylinder repair kit. Access is much improved by first detaching the appropriate ducts and hoses from the areas directly above the cylinder, on top of the transmission/clutch housing. 24 To avoid excessive fluid loss when the hydraulic line is detached from the operating cylinder, remove the filler cap from the reservoir, place a clean piece of polythene sheet over the filler neck and refit the reservoir cap. 13 11.7A Clutch hydraulic fluid reservoir showing MIN and MAX markings 11.7B Topping up the fluid level in the clutch fluid reservoir 11.12 Clutch master cylinder and hydraulic pipe connections 13•94 Supplement: Revisions and information on later models at the gear lever end as described in Chapter 6, Section 3. 5 Disconnect the rods at the transmission end by unscrewing the nuts and bolts which connect the linkage rods to the selector rods (photo). 6 Extract the spring clip which retains the end of the short link rod (photo). Gearchange linkage (Antiskid models) - general 11.25 Clutch operating cylinder showing hydraulic line connection and bleed nipple (arrowed) 11.26 Clutch operating lever (A) and operating cylinder bracket-to-transmission housing bolt (B) 25 Unscrew the union nut and detach the hydraulic fluid line from the operating cylinder (photo). 26 Undo the cylinder/mounting bracket retaining bolts and lift clear the cylinder together with the bracket (photo). Release the retaining clip and separate the cylinder from the bracket. 27 To dismantle the cylinder, prise free and pull back the dust boot, withdrawing it together with the operating rod. 28 Invert the cylinder and shake free the piston and seal assembly. If it is stuck inside the cylinder, remove the bleed screw then apply moderate air pressure (from a foot pump) into the bleed port and catch the cylinder in a clean cloth as it is ejected. 29 Remove the seals noting their orientation. Clean all components in methylated spirits or new hydraulic fluid. If the cylinder is damaged, scored or badly worn it must be renewed. The seals must always be renewed once they are removed. 30 Assemble the new seals to the piston and lubricate the cylinder, seals and piston assembly with new hydraulic fluid (of the specified type) before assembling them. Ensure that the seals are fitted the correct way round (as noted during removal). 31 Renew the dust boot, fit and secure the operating rod into position then refit the dust boot over the cylinder. If removed, refit the bleed screw. 32 Reconnect the cylinder to the mounting bracket and refit the combined assembly to the vehicle in the reverse order of removal. Ensure the hydraulic union is clean and take care not to damage the threads as it is reconnected. 33 Remove the polythene seal from the hydraulic reservoir filler neck, top up the fluid level and bleed the system as described below. the end of the operating cylinder (see photo 11.25). The clutch hydraulic circuit reservoir is mounted in the engine compartment on the left-hand side near the bulkhead and is separate from the master cylinder. As the system is being bled, ensure that the fluid level in the reservoir is maintained between the MIN and MAX level marks. Do not allow the fluid level to drop below the MIN level mark otherwise air will enter the system and greatly lengthen the operation. Wipe clean any fluid spillage from the paintwork or adjacent components as it has a corrosive effect if left. Clutch hydraulic system bleeding 12 Transmission PART A: 1301 CC TURBO IE ENGINE Description 1 The transmission is of five-speed type, based on that used in the Fiat Strada 105 TC. 2 For all practical purposes, the operations described in Chapter 6 apply, but observe the following differences. 7 The gearchange linkage and internal selector arrangement has been modified, as shown in Fig. 13.89. Final drive output shafts description and oil seal renewal # 8 The output shafts on this transmission incorporate a flange on the left-hand side, to which a coupling flange on the driveshaft is bolted. On the right-hand side, an intermediate shaft (see Section 13) is splined directly into the differential side gear. 9 A leaking oil seal may be renewed on the left-hand side of the final drive casing after first disconnecting the driveshaft. Then using two levers, prise out the flange/stub shaft against the tension of its retaining circlip. 10 Unbolt and remove the bearing cover. When refitting the cover, make sure that the O-ring is in good condition. 11 To renew the oil seal on the right-hand side, first remove the intermediate driveshaft, and then prise the defective seal out of the final drive housing using a suitable tool. 12 Apply grease to the new seal lips before refitting the intermediate shaft or the stub shaft. Tighten all bolts to the specified torque. PART B: 1372 CC IE AND 1372 CC TURBO IE ENGINES Description 3 This is of two-rod type. 4 Remove the gaiter and disconnect the rods 1 The transmission is of five-speed type, based on that used in the FIAT Tipo. The transmission is mounted in-line with the engine and is located in the left-hand side of the engine compartment. Drive from the clutch is transferred through the input shaft and the mainshaft to the integrally-located 12A.5 Gearchange rod connections at transmission (1301 cc Turbo ie engine) 12A.6 Gearchange link rod spring clip (arrowed) on the 1301 cc Turbo ie engine Gearchange linkage removal and refitting ¡ # 34 The clutch hydraulic circuit is bled in much the same manner to that described for a brake circuit. Refer to Section 12 in Chapter 8 and proceed as described, but note that the bleed screw for the clutch circuit is located in Supplement: Revisions and information on later models 13•95 final drive unit. The inboard end of each driveshaft locates in the differential. All helical gear clusters are in constant mesh, with the fifth gear assembly located on an intermediate plate mounted on the rear end of the gearbox. Gear engagement is made by sliding synchromesh hubs. Gearchanges are made via a central floor-mounted gear lever. Maintenance ¡ 2 Maintenance is limited to periodically checking the oil level, topping up as required, renewing the oil, and visually inspecting the transmission for oil leaks. The most likely source of an oil leak will be from the driveshaft seals. Oil level - checking Fig. 13.89 Gearchange control linkage on the 1301 cc Turbo ie model with Antiskid (Sec 12) ¡ 3 For improved access, jack up the vehicle and support it on axle stands. Note that the vehicle must be level in order to carry out this check. 4 If the transmission is hot due to the car having been driven recently, allow it to cool before making the check; oil foams when hot and can produce a false level reading. Wipe the area around the filler plug then unscrew and remove the plug from its location in the front of the casing. The oil should be level with the base of the filler plug hole. 5 If necessary, top up with oil of the specified grade. 6 On completion refit the filler plug, wipe clean any oil spillage, then lower the car to the ground. Oil - renewal ¡ 7 The transmission oil should ideally be drained when hot (directly after the vehicle has been used). For improved access, jack up the vehicle and support it on axle stands. Note that the vehicle must be level to ensure a correct level reading when topping up. 8 Wipe clean the area around the filler plug on the front face of the transmission casing, then unscrew and remove the plug. 9 Position a suitable container underneath the drain plug (located at the left-hand end of the transmission). Unscrew the plug and allow the oil to drain into the container. Oil will start to drain before the plug is fully withdrawn so take precautions against scalding. Wait about ten minutes to allow the oil to drain fully. 10 When the oil has finished draining, clean around the threads of the drain plug and its location in the transmission casing, then refit the plug and tighten it. 11 Refill the transmission with the specified quantity and grade of oil through the filler/lever plug hole. With the vehicle level and the transmission cold check the oil level as described above, then refit and tighten the plug. Lower the vehicle to complete. Gearlever and linkages - general Fig. 13.90 Exploded view of the transmission unit fitted to 1372 cc models (Sec 12) 12 The component parts of the gearchange and selector assemblies are shown in Figs. 13.91 and 13.92. They do not normally 13 13•96 Supplement: Revisions and information on later models Fig. 13.91 Exploded view of the gear selector lever, rod and linkage components on 1372 cc models (Sec 12) require maintenance other than general inspection for wear in the linkage joints. If excessive wear is found in any of the joints, they can be individually detached and renewed. 13 Access to the control rods is eased by detaching and lowering the exhaust system from the exhaust manifold. 14 If a new adjustable control rod is to be fitted, remove the original rod as a unit, but do not alter its adjustment for length. The new rod can then (if required) be set to the same length as the original in order to maintain the original setting. Do so by loosening off the locknut and turning the balljoint as required; ensure that the angle of the joint is correct before tightening the locknut. 15 Access to the gear lever/main connecting rod joint from above is made by prising back the gear lever gaiter from the centre console. Access from underneath can be made by raising and supporting the car on axle stands. Working from the underside of the lever, undo the retaining nuts and remove the inspection plate from the floor (photos). 16 Any adjustment to the gear linkage should be entrusted to a FIAT dealer. Transmission removal and refitting Fig. 13.92 Exploded view of the gear selector and control road assembly components fitted to 1372 cc models (Sec 12) 12B.15A Gear lever connection to the main connecting rod on the 1372 cc engine 12B.15B Access cover to gear lever lower connection to rod on the 1372 cc engine # 17 The transmission can be removed together with the engine and then separated as described in Section 7, or on its own (as described below), leaving the engine in position in the car. Before starting to remove the transmission, it should be noted that suitable equipment will be required to support the engine during this procedure. 18 Disconnect the battery negative lead. 19 Remove the bonnet as described in Chapter 12. 20 Refer to Section 11 in this Chapter for details and detach the clutch operating cylinder together with its mounting bracket from the top of the transmission, but do not disconnect the hydraulic fluid hose from the cylinder connection. Leave the cylinder attached to the bracket. Tie the cylinder and bracket up to support them out of the way. 21 Reaching down between the transmission and the bulkhead, unscrew the knurled retaining nut and withdraw the speedometer cable from the transmission. 22 Remove the front roadwheel trims, then loosen off the front wheel retaining bolts. Raise the vehicle and support it on axle stands at a suitable height to allow working underneath and eventual transmission removal from under the front end. 23 Drain the transmission oil as described previously in this Section. 24 Disconnect and remove the starter motor (photos). 25 Detach the reversing light switch lead connector. 26 Undo the retaining bolt and detach the earth lead from the rear end of the transmission (see photo 7C.33). Refit the bolt once the lead has been disconnected. Supplement: Revisions and information on later models 13•97 12B.24A Starter motor electrical connection . . . 12B.24B . . . and retaining bolts (arrowed) on the 1372 cc ie engine 27 The engine must now be supported at its left-hand end. If the engine/transmission lift bracket is unbolted it can be attached at another suitable position on the engine and the lift sling/tool attached to it, but take care not to attach it to a weak fixing point. 28 The engine will need to be supported using an engine lift beam/support bar of the type shown in Fig. 13.93. A strong wood or metal beam resting on blocks in the front wing drain channels will suffice, or alternatively use an engine lift hoist and sling. 29 Refer to Section 13 in this Chapter and Section 2 in Chapter 7 for details and remove the front driveshaft each side. 30 Prise back the tabs of the retaining washers, then undo the retaining nuts and detach the exhaust downpipe from the manifold. Detach the exhaust mounting bracket (where applicable) and lower the exhaust to allow access to the gearchange linkages. 31 Disconnect the gearchange control and selector link rod balljoints (photo). Do not alter their lengths or the adjustment setting will be affected. 32 Using a small diameter pin punch, drive the retaining pins from the retaining clips which secure the left-hand side underwing shield. Prise free the clips and detach the shield. 33 Undo the retaining bolts and remove the lower cover plate from the flywheel housing (photo). 34 Position a trolley jack under the transmission with an interposed block of wood to protect the casing and spread the load. Raise the jack to support the weight of the transmission. 35 Check that the weight of the engine is securely supported, then unbolt and detach the front engine mounting unit, then the rear engine mounting unit. 36 Unscrew and remove the remaining bolts securing the transmission to the engine. As they are removed, note the position of any brackets or additional fixings secured by these bolts (photo). 37 Check around the transmission to ensure that all fixings are detached from it and out of the way, then carefully pull the transmission free from the engine dowel pins. If possible engage the aid of an assistant to help in guiding or lowering the unit as it is removed. As the unit is withdrawn from the engine, take care not to place any strain on the input shaft. Once the input shaft is clear of the clutch, the transmission can be lowered and manoeuvred from underneath the car. If available, lower the unit onto a suitable crawler board to ease its withdrawal from under the front end of the car. 38 Dismantling and overhaul of this transmission is not recommended. If the transmission has covered a high mileage it is likely that several internal components are in need of renewal. The cumulative cost of renewing all worn and defective components will almost certainly make overhaul uneconomical when compared with the cost of a new or service exchange transmission from a FIAT dealer or transmission specialist. Fig. 13.93 FIAT lift beam/support bar in place to support the weight of the engine. Inset shows lift hook engagement point 1372 cc models (Sec 12) 39 Refitting is a reversal of the removal procedure, but note the following special points. a) Ensure that the engine and transmission mating surfaces and the dowel pins are clean and that all clutch components are in good condition. b) Apply a thin smear of molybdenum disulphide grease to the splines of the input shaft. Do not over-lubricate though or the grease may work its way onto the clutch friction surfaces and cause clutch slip. c) Raise the transmission so that it is in-line with the engine, engage the end of the input shaft into the clutch driven plate hub and align the splines of each to enable the transmission to be pushed home. It may well be necessary to turn the flywheel a fraction so that the splines align for re-engagement d) Do not fully tighten the engine and transmission retaining bolts until all are attached. e) Tighten all retaining bolts and nuts of the specified torque wrench settings (where given). f) Refer to Section 13 in this Chapter for details on refitting the driveshafts. g) Refill the transmission with the specified quantity and grade of oil before lowering the car to the ground (see paragraph 11). 13 12B.31 Gear control and selector link rod joints 12B.33 Lower cover plate and retaining bolts (arrowed) 12B.36 Transmission upper retaining bolts. Note bracket under the left-hand bolt 13•98 Supplement: Revisions and information on later models 1 Sliding part of gear lever 2 Reverse gear inhibitor device flexible control cable 3 Gear selector control rod 4 Gear engagement control cable 5 Gear selector adjustable control rod 6 Gear selector and engagement control shaft 7 Reverse gear inhibitor device Fig. 13.94 C514 type 5-speed transmission PART C: 999 CC AND 1108 CC WITH C514 TYPE TRANSMISSIONS Description 1 A new 5-speed transmission was introduced to selected models during 1992. Identified by the way reverse gear is engaged. The gear knob needs to pressed downwards whilst pushing the lever to the extreme right. 2 The new design includes control cables as well as rods for gear selection, see Fig. 13.94. Maintenance ¡ Fig. 13.95 Gear selector adjustable rod (C514 type transmissions) A Adjusting nut B Location of notch in outer sleeve 3 At the time of writing, no maintenance instructions were available, however should selecting gears become difficult, check the following. 4 The gear lever should rest vertically in neutral. If it does not, alter the gear selector adjustable rod, as appropriate. 5 Whilst turning the adjustment nut, counterhold with a 10 mm open ended spanner, located in the notch built into the sleeve. Refer to Fig. 13.95. 13 Driveshafts Inboard joint boots (non-Turbo models, September 1987 on) modification 1 Modified boots have been fitted to the differential ends of the driveshafts on nonTurbo models produced after September 1987. 2 The new boots incorporate a seal/bearing assembly, and it is very important when a boot is being fitted to the driveshaft that it is located as shown in Fig. 13.96. Fig. 13.96 Driveshaft boot positioning diagram - later non-Turbo models (Sec 13) Left-hand shaft Right-hand shaft With 4-speed transmission, With 4-speed transmission, A = 143.0 mm (5.63 in) A = 123.0 mm (4.84 in) With 5-speed transmission, With 5-speed transmission, A = 133.0 mm (5.24 in) A = 108.9 mm (4.25 in) B = 0 to 1 mm (0 to 0.04 in) Supplement: Revisions and information on later models 13•99 Fig. 13.98 Components of the intermediate driveshaft - Turbo ie models (Sec 13) Fig. 13.97 Crimping the driveshaft boot securing band (Sec 13) 3 The boot retaining band must be crimped using suitable pinchers at the highest point on the boot. Intermediate driveshaft (Turbo ie models) # 1 Bearing retaining plate 2 Ball bearing 3 Wave washer 4 Circlip 5 Bearing cap be renewed after removing the plate, circlip and washer, and pressing the shaft out of the bearing. 10 When fitting the new bearing, apply pressure only to the inner track, and do not apply any heat. Description Refitting 4 On these models, an intermediate driveshaft is fitted between the final drive of the transmission and the flange of the right-hand driveshaft. 5 A support bearing assembly for the intermediate shaft is bolted to the engine crankcase. The bearing carrier also acts as the alternator bracket. 11 This is a reversal of removal. Tighten all bolts to the specified torque and replenish the transmission oil. Removal 6 Drain the transmission oil. Disconnect the right-hand driveshaft from the intermediate shaft flange, move the driveshaft aside, and support it. 7 Unscrew and remove the bolts which hold the intermediate shaft retainer plate to the crankcase support bracket. 8 Withdraw the intermediate shaft from the final drive housing. The shaft assembly, complete with bearing, will pass through the crankcase support bracket until the bearing retainer and flexible boot can be slipped off the shaft. Inboard CV joints (Turbo ie models) - overhaul # 12 A worn joint is best renewed, but it may be necessary to dismantle it for cleaning, if replacement of a split boot has been neglected. 13 Disconnect the boot securing clip and pull the boot up the shaft. Wipe away the old grease. Fig. 13.99 Extracting the CV joint circlip Turbo ie models (Sec 13) 14 Extract the joint securing circlip and pull the joint from the shaft. 15 Renew the joint complete if it is worn or damaged. 16 Before dismantling the joint, align the housing and ball cage marks “A” and “B” (Fig. 13.100). 17 Tap the joint from its backplate. 18 Turn the ball/cage assembly through 90º, mark its relative position to the outer track and withdraw it (photo). 19 The balls are a light snap fit in the cage. Once they are removed, the inner and outer cage members can be separated; again, mark the side of the cages in relation to the outer track (photos). Bearing renewal 9 The bearing on the intermediate shaft can 13.18 Removing inboard CV joint ball/cage assembly from outer track 13.19A CV joint balls and cage 13 Fig. 13.100 CV joint housing and ball cage alignment marks (A and B) - Turbo ie models (Sec 13) 13.19B Separating inner and outer cage members 13.19C Components of CV joint 13•100 Supplement: Revisions and information on later models 13.21 Outer track reference groove Fig. 13.101 Correct position of driveshaft damper weight on 1108 cc and 1372 cc ie models (Sec 13) Dimensions in mm 13.24 Right-hand driveshaft damper weight 20 When reassembling, pack the joint with special FIAT Tutela MRM2 lubricant; if this is not available, use molybdenum disulphide grease. 21 The reference groove on the outer track must be assembled so that it is towards the final drive when refitted (photo). 22 Pack the joint and the inside of the boot liberally with the specified grease. 23 If a new joint is being fitted to the shaft, make sure that the joint and shaft colour codes match. Shaft colour Joint colour Blue Blue or white Red Red or white Right-hand driveshaft damper weight (1108 cc and 1372 cc ie models) removal and refitting # 24 A damper weight is fitted to the longer, right-hand driveshaft to reduce vibration (photo). 14A.2A Front brake pad locking block is secured by a clip on the inboard end of the brake unit on certain models 25 It should not be necessary to remove the damper weight unless the driveshaft is to be renewed, or the weight has been damaged. 26 The weight is in two halves, and can be removed by simply unscrewing the two clamp bolts securing the two halves to the driveshaft. Note that the weight locates on a rubber mounting which is split along its length, and can simply be pulled from the driveshaft for renewal if necessary. 27 Refitting is a reversal of removal, but ensure that the damper weight is positioned exactly as shown in Fig. 13.101. 14 Braking system PART A: BRAKING SYSTEM - GENERAL 2 On some models the clip securing the disc pad locking block is located on the inboard end, rather than the outer end (shown in Chapter 8). To ensure correct reassembly, check the location of the original block retaining clip before dismantling the brake unit. The alternative fixing arrangement is shown in the accompanying photos, in this instance on a 1372 cc ie model (photos). PART B: BRAKING SYSTEM - TURBO IE MODELS Description 1 Disc brakes are fitted to all four wheels on the Turbo ie models. The front disc brakes are of different design from those used on other models, in that the wear in the pads can be checked without the need to remove the caliper cylinder housing. Front disc pads - renewal ™ 1 The front brake pads have modified anti-vibration plates and a wire spring fitted to prevent them from vibrating and knocking in operation. 2 Raise the front of the car and remove the roadwheels. 3 Check the thickness of the friction material on the pads through the aperture in the caliper cylinder body. If the thickness of the material is 1.5 mm or less, then the pads on both sides must be renewed (photo). 14A.2B Front brake locking block orientation with inboard retaining clip 14B.3 Front disc pads (arrowed) on Turbo ie model Front brake pads - all later models Supplement: Revisions and information on later models 13•101 14B.4 Unscrewing the caliper cylinder housing lower guide bolt 14B.6 Disc pad and anti-rattle spring removal 14B.10 Applying thread-locking fluid to the bolt threads 4 Using a ring spanner and an open-ended spanner, unscrew and remove the caliper cylinder housing lower guide bolt (photo). Release the upper bolt, but do not remove it. 5 Swivel the cylinder housing upwards and tie it up out of the way. There is no need to disconnect the hydraulic hose. The sensor wiring plug will have to be disconnected (where fitted). 6 Remove the pads, complete with anti-rattle springs (photo). 7 Clean away all dust and dirt, taking care not to inhale it as it may be injurious to health. 8 The caliper piston must now be fully depressed to accommodate the new, thicker, pads. Do this using a G-clamp or lever, but anticipate a rise in the brake fluid reservoir level by syphoning out some of the fluid using a clean syringe. 9 Fit the new pads, which must be of the same type as the originals, complete with anti-rattle springs. 10 Locate the cylinder body. The fixing bolts are of self-locking type, and should be renewed whenever they are loosened or removed. If new ones are not available, clean the threads of the old ones thoroughly and apply thread-locking fluid (photo). Tighten the bolts to the specified torque. Check that the rubber dust excluders are in good condition. 11 Reconnect the sensor wiring plug. 12 Renew the pads on the other front wheel. 13 Refit the roadwheels, and then apply the footbrake several times to position the pads against the discs. 14 Top up the brake fluid reservoir if necessary (photo). cylinder body, once the car has been jacked up and the roadwheels removed (photo). 24 If the thickness of the pad friction material is less than 1.5 mm, renew the pads on both sides in the following way. 25 Using a ring spanner and an open-ended spanner, unscrew the caliper cylinder body fixing bolts. 26 Withdraw the caliper and remove the disc pads, complete with anti-rattle springs (photo). 27 Clean away all dust and dirt, but avoid inhaling it, as it may be injurious to health. 28 Fully retract the caliper piston in order to accommodate the new, thicker, pads. To do this, rotate the piston clockwise, using a suitable tool engaged in the handbrake sectors (photo). Anticipate a rise in the brake fluid reservoir level by syphoning out some fluid, using a clean syringe. Front disc caliper removal and refitting # 15 Raise the front of the car and remove the appropriate roadwheel. 16 Using a ring spanner and an open-ended spanner, unscrew and remove the cylinder housing fixing bolts. 17 Withdraw the cylinder housing, and then, holding it firmly, release the flexible hydraulic hose union. Unscrew the cylinder body from the end of the flexible hose, and then cap the end of the hose to prevent loss of fluid. 18 If required, the disc pads can be removed and the caliper support bracket unbolted and removed. 19 Refitting is a reversal of removal, but use new fixing bolts. 20 Bleed the front hydraulic circuit. Front disc caliper - overhaul 21 The operations are as described in Chapter 8, Section 5, paragraphs 6 to 13. Front brake disc - inspection, renovation or renewal 22 The operations are as described in Chapter 8, Section 6, but the caliper fixing bolts are secured with thread-locking fluid; lockplates are not used. Rear disc pads - renewal ™ 23 Any wear in the disc pads can be observed through the aperture in the caliper 14B.14 Topping up the brake fluid reservoir (1301 cc Turbo ie model) 13 14B.23 Rear brake pad inspection aperture 14B.26 Withdrawing the rear brake caliper 14B.28 Rotating a rear caliper piston 13•102 Supplement: Revisions and information on later models 14B.29 Rear disc pad 14B.36 Disconnecting the handbrake cable from the caliper lever 14B.42 Unscrewing a rear caliper bracket bolt 29 Fit the new pads, complete with anti-rattle springs (photo). 30 Refit the caliper using new self-locking bolts, or if not available, apply thread-locking fluid to clean threads of the original bolts. Tighten the bolts to the specified torque. 31 Apply the brake pedal several times to bring the disc pads up against the disc. 32 Top up the brake fluid reservoir if necessary. 33 Check the adjustment of the handbrake. 34 Refit the roadwheels and lower the car to the ground. 36 Disconnect the handbrake cable from the caliper. To do this, grip the cable nipple and pull it until the cable can be slipped out of its lever groove (photo). If necessary, slacken the cable adjustment. 37 Using a pair of pliers or similar tool, turn the piston in an anti-clockwise direction until it can be removed from the cylinder. 38 Having obtained a repair kit, renew the seal and dust excluder. 39 Reassemble the piston to the cylinder, turning it clockwise as far as it will go. 40 Reconnect the handbrake cable. 41 Carry out the operations described in paragraphs 30 to 32. 44 The brake master cylinder and vacuum servo are mounted on the left-hand side of the engine compartment rear bulkhead. In consequence, the brake pedal on right-hand drive cars operates through a cross-shaft, which is located underneath the facia panel inside the car. 45 The cross-shaft is supported in two brackets, whose mounting nuts can be reached through cut-outs in the insulation on the engine compartment rear bulkhead (photo). 46 To remove the cross-shaft, working inside the car, take off the cover from the left-hand end of the shaft, and then disconnect the servo pushrod from the crankarm on the cross-shaft (photo). 47 Disconnect the brake pedal from the right-hand crankarm on the cross-shaft (photo). 48 Disconnect the accelerator pedal by extracting the split pin which secures its pivot spindle. 49 The cross-shaft may now be removed after extracting the cotter pin from the left-hand end of the shaft. 50 Push the shaft first to the right, and then to the left, to release it from its brackets. 51 Alternatively, the cross-shaft, complete with brackets, may be removed as an assembly if the bulkhead nuts are unscrewed. 52 Removal of the brake and clutch pedals is described in Chapter 5, Section 4, but note that on hydraulic clutch models, the master cylinder will also require removal as described in Section 11 of this Chapter. 53 Refitting is a reversal of the removal procedure. 14B.47 Right-hand end of brake pedal cross-shaft 14B.54 Master cylinder/vacuum servo located next to the coolant expansion tank (1301 cc Turbo ie model) Rear disc caliper removal, overhaul and refitting ¢ 35 Carry out the operations described in paragraphs 25 to 27. Rear brake disc inspection, renovation or renewal ™ 42 The operations are as described in Chapter 8, Section 6, but the caliper bracket fixing bolts are of the socket-headed type and thread-locking fluid is used, not lockplates (photo). Pressure regulating valve 43 The valve renewal and adjustment operations are described in Chapter 8, Section 10, but the luggage compartment should be loaded with 45 kg and the load applied to the bracket eye should be 11 kg. 14B.45 Brake pedal cross-shaft fixed nut (arrowed) on engine compartment rear bulkhead 14B.46 Left-hand end of brake pedal cross-shaft Brake pedal removal and refitting # Supplement: Revisions and information on later models 13•103 1 Electronic control unit (ECU) 2 Roadwheel speed sensors 3 Pressure modulators 4 Vacuum reservoir 5 Check valve 6 Air cleaner 7 Load proportioning (pressure regulating) valves 8 Vacuum switch 9 ECU relay 10 System fault warning lamp relay 11 System fault warning lamp 12 Brake stop lamp switch Fig. 13.102 Braking system on Turbo ie Antiskid models (Sec 14) Vacuum servo unit and master cylinder - general 54 Access to the vacuum servo unit and the master cylinder can only be obtained after the cooling system expansion tank has been released and moved aside (photo). always be of the type originally fitted by the vehicle manufacturer. 61 Maintenance of the system should be limited to checking the security of all electrical and hydraulic connections. Individual components are not repairable, and must be renewed complete if faulty. Antiskid system - description 55 This system is available as an option on the Turbo ie models only. 56 The purpose of the system is to prevent the wheel(s) locking during heavy brake applications. This is achieved by automatic release of the brake on a roadwheel which is about to lock up, after which the brake is re-applied. This cycle is carried out many times per second under heavy braking, retaining full steering control to avoid any hazards. 57 The main components of the system are shown in Fig. 13.102. The control module processes the signals received from the sensors, and compares them with deceleration values of the roadwheel and the slip values of the tyre, which are stored in the module memory. 58 When reference values are exceeded and wheel lock is imminent, the control module signals the pressure modulators, which in turn decrease the brake hydraulic pressure. 59 Vehicle road speeds are also taken into account by the module’s electronic circuits. 60 In order to retain optimum system performance, the tyres and wheels should 15 Electrical system Alternator (999 and 1108 cc models) removal and refitting ¡ bolts, then raise and support the car at the front end on axle stands. Remove the right-hand roadwheel. 8 Remove the wheel arch underwing shield by driving the compression pins from the centre of the retaining clips (using a 2 mm drift), then prise free the panel retaining clips and remove the shield. Keep the pins and clips in a safe place and renew any that may have been damaged during removal (photo). 9 Detach the wiring connector from the alternator. 10 Release the alternator mounting and belt adjuster link bolts, and take off the drivebelt. 11 Take out the alternator top and bottom mounting bolts. 1 To remove the alternator from 999 cc engine models, disconnect the leads from the terminals on its rear face. 2 Extract the screws and remove the plastic drivebelt guard. 3 Slacken the mounting and adjuster bolts, push the alternator in towards the engine and remove the drivebelt. 4 Remove the mounting and adjuster bolts, and withdraw the alternator downwards through the gap between the right-hand driveshaft and the engine sump pan (photo). 5 Refitting is a reversal of removal; re-tension the drivebelt. ¡ 13 Alternator (later models) removal and refitting 6 Disconnect the battery negative lead. 7 Loosen off the right-hand front roadwheel 15.4 Removing the alternator from the 999 cc engine 13•104 Supplement: Revisions and information on later models 15.8 Remove the wheel arch lower guard panel for access to the alternator 12 Disconnect the air cooling hose from the rear cover of the alternator, and then unscrew the fixing nuts and take off the rear cover with hose spout. Mark the position of the cover on the alternator before removing it, so that the spout will be correctly positioned when refitted (photos). 13 Unbolt the driveshaft bearing support/alternator bracket from the engine crankcase, and swivel the support downwards to provide space for withdrawal of the alternator (photo). 14 Withdraw the alternator from under the right-hand front wing (photo). 15 Refit in the reverse order of removal. Refit the drivebelt and ensure correct engagement with the pulleys, then set the drivebelt tension and tighten the alternator retaining nuts. 15.12A Alternator air cooling hose Alternator brushes renewal # 16 Depending on model, the brush holder is secured by two screws, which should be extracted and the brush holder removed (photos). 17 New brushes and the holder are supplied as an assembly. Starter motor (999 cc models) removal and refitting ¡ 18 To remove the starter motor from 999 and 1108 cc models, first disconnect the leads from the starter motor terminals. 19 Release the washer fluid reservoir flexible bag from the engine compartment rear bulkhead and move it to the left-hand side. 20 Unscrew the starter motor mounting 15.12B Alternator rear cover and fixing nut bolts, withdraw the starter from the flywheel bellhousing, and then lift it out of the left-hand side of the engine compartment (photo). 21 Refitting is a reversal of removal. Starter motor (1301 cc Turbo ie, 1372 cc ie, 1372 cc Turbo ie) removal and refitting ¡ 22 Disconnect the battery. Working from under the front end of the car, unscrew the starter motor mounting bolts and disconnect the electrical leads. 23 Withdraw the starter motor downwards. On Turbo models, there is just enough clearance, if the oil cooler hose and the oil pressure switch lead are deflected carefully aside (photos). 24 Refit by reversing the removal operations. 15.13 Driveshaft bracket swivelled downwards 15.14 Withdrawing the alternator 15.16A Extracting the alternator brush holder screw 15.16B Removing the alternator brush holder 15.20 Starter motor removal from the 999 cc engine 15.23A Starter motor removal from the 1301 cc Turbo ie engine Supplement: Revisions and information on later models 13•105 15.23B Starter motor and wiring connections on the 1372 cc ie engine Starter motor brushes (later models) - renewal # 25 When renewing the starter motor brushes on later models, the old brushes will need to be crushed (in a vice or with a hammer) and their leads then soldered to the new brushes. Fuses - later models 26 The fuse arrangement is slightly different on later models, but the circuits protected are still identified by a symbol. Refer to the Specifications Section for full details. Note also the terminal block with plastic cover, which can be used to isolate the battery from the electrical system by disconnecting the leads from the terminals (photos). 15.26A Fuse block on the 1301 cc Turbo ie model 15.26B Battery lead terminal block on the 1301 cc Turbo ie model 29 Some later models are fitted with headlamp beam adjusters which allow temporary resetting to be made (such as when the car is fully loaded). Access to these adjusters is made by lifting the bonnet (photo). 30 Turn the adjusters anti-clockwise to lower the beam to the normal level or clockwise to raise the beam (when the car is unloaded). Repeat the procedure on the opposite headlamp unit an equal amount. 31 Other later models have separate horizontal and vertical beam adjusters, positioned as shown (photos). A load compensating lever is attached to the adjusters to enable temporary resetting of the headlamp beams, without changing the normal adjustment. Turn the lever to the appropriate side (right or left) to make the adjustment as required. The normal setting 15.28 Headlamp unit fitted to the 1372 cc ie model 15.29 Headlamp beam adjuster on the 999 cc Turbo ie model Fuel injection system main control relay adjacent to airflow meter Headlamps later models 28 The headlamp units fitted on later models differ according to model, but the bulb and unit replacement details are generally the same as described for previous models in Chapter 9. Note that the rubber cover can only be fitted with the tab to the top as shown (photo). Headlamp beam adjusters for load compensation - later models Relays (Turbo ie models) general 27 On Turbo ie models, the relays mounted in the fuse block are as shown in Fig. 13.103. Additional relays are located as follows: Headlamp relay - on lead under main fuse block Fig. 13.103 Auxiliary fuses and relays on 1301 cc Turbo ie models (Sec 15) 1 2 3 4 5 6 7 8 9 10 Horn relay Heated rear screen relay Foglamps relay Radiator fan relay Electric windows relay Foglamps fuse Radiator fan second speed fuse Fuel injector fan fuse Electric windows fuse Electric fuel pump fuse 13 15.31A Headlamp horizontal beam alignment adjuster screw on a 1372 cc ie model 15.31B Headlamp vertical beam alignment adjuster screw on a 1372 cc ie model. Note the load compensator lever which is set in the “O” (normal load) setting position 13•106 Supplement: Revisions and information on later models 15.34 Headlamp dim-dip transformer 15.37A Undo the retaining bolts . . . 15.37B . . . and withdraw the front fog lamp unit . . . adjustment procedures are the same as those outlined for the previous model units in Chapter 9, but ensure that the load compensation lever is turned to the “O” (normal load setting) position before making any adjustments. on parking lamps only in built-up areas. 34 Headlamp intensity is reduced by the transformer located at the front of the engine compartment (photo). 35 Any attempt to start the car with parking lamps only on will automatically cause the headlamps to switch on with a low-intensity dipped beam. Dipped and main beam function normally. 36 The headlamp dim-dip system is a legal requirement for all UK models registered after April 1st, 1987. screws and withdraw the lamp unit from the underside of the front bumper (photos). 38 Undo the retaining screw and remove the access cover from the unit (photo). 39 Disconnect the wiring connector from the bulb, release the clips and withdraw the bulb from the lamp (photo). 40 Refit in the reverse order of removal. Check the light for satisfactory operation and if the beam requires resetting, turn the adjustment screw in the required direction. 41 To adjust the beam, position the car 5 m from, and square on to, a wall or similar. 42 Measure the height of the centre of the lamp lens from the ground and mark the position on the wall. Switch on the lamp. The demarcation line (cut-off) of the light should be below the mark on the wall by 50 mm plus one-third of the ground-to-lamp centre measurement. Adjust the beam as required using the long centre screw. Headlamp unit removal - later models 32 The removal and refitting procedures described in Chapter 9 also apply to the later headlamp type, but note that later units are secured in position by three retaining screws. Headlamp dim-dip system description Front fog lamps - bulb/unit removal and refitting and beam adjustment 33 On later models, the wiring circuit has been modified to prevent the car being driven 37 Ensure that the front fog lamps are switched off, then unscrew the two retaining ™ Horn - relocation 43 The single horn, on applicable models, is now located behind the grille, bolted on a bracket attached to the top rail (photo). Steering column combination switches (later models) removal and refitting ¡ 15.38 . . . remove the rear cover . . . 15.39 . . . detach the wires, extract the bulb 15.43 Horn location 15.45A Undo the retaining screws . . . 44 Disconnect the battery negative lead. 45 Undo the retaining screws and remove the steering column shrouds (photos). 46 Remove the steering wheel as described in Chapter 10. 15.45B . . . then remove the upper . . . Supplement: Revisions and information on later models 13•107 15.45C . . . and the lower column shroud . . . 15.47A Undo the retaining screw . . . 47 Loosen off the switch-to-column clamp screw, disconnect the wiring connectors to the switch and withdraw the switch from the column (photos). 48 Refit in the reverse order of removal, but ensure that the lug of the switch aligns with the slot in the column as it is fitted into position. Check for satisfactory operation of the switches on completion. 53 Insert a thin-bladed screwdriver into the joint between the switch block and the switch block housing, to depress the plastic retaining tabs. Do this carefully, otherwise the switch block or casing will be damaged. 54 Withdraw the switch block. Individual switches can now be pushed out of the block. Fibre optics are used to illuminate some switches, these simply pull out of their sockets (photos). The illumination bulb is located on a crossmember found behind the instrument pack. Removal of instruments/top cover allows access. 55 The switch housing can be removed after extracting the fixing screws (photos). 56 Refitting is a reversal of removal. Instrument panel (Turbo ie models) removal and refitting ¡ 49 The instrument panel on these models incorporates an engine oil pressure gauge and a turbo boost gauge. The latter is connected directly to the inlet manifold. 50 Apart from disconnecting the boost gauge rubber hose, the instrument panel removal and refitting procedure is as described in Chapter 9 for the 1301 cc model or from paragraph 57 in this Section for the 1372 cc model. 51 A digital electronic instrument panel is available as an option on Turbo ie models. The removal and refitting procedures differ from analogue instrument panels in respect of the electrical connections - a speedometer drive cable is not used. Facia-mounted switches (1301 cc Turbo ie model) removal and refitting 52 Disconnect the battery. ¡ 15.54A Switch block withdrawal on the 1301 cc Turbo ie model 15.47B . . . and remove the column switch Instrument panel (later models) removal and refitting ¡ 57 Disconnect the battery negative lead. 58 Unscrew and remove the two instrument panel-to-facia retaining screws (photo). 59 Remove the lower facia trim panel, which is secured by two screws and a nut. Reach up to the rear of the instrument panel to disconnect the speedometer cable, then push the panel from its recess in the facia. Disconnect the multi-connectors from the rear face of the panel and withdraw it (photo). 60 Refit in the reverse order of removal. Ensure that the speedometer cable is fully engaged as the unit is refitted into position. 15.54B Disconnecting a fibre optic cable from its holder on the 1301 cc Turbo ie model 13 15.55A Facia switch housing lower screw removal on the 1301 cc Turbo ie model 15.55B Facia switch housing inner screw removal on the 1031 cc Turbo ie model 15.58 Remove the retaining screws . . . 13•108 Supplement: Revisions and information on later models 15.59A . . . withdraw the instrument panel . . . Auxiliary control panel (later models) removal and refitting ¡ 61 Disconnect the battery negative lead. 62 Insert the flat of a screwdriver under the trim piece at the end of the auxiliary panel as shown and prise it free. Repeat the procedure and remove the trim piece at the other end of the panel (photo). 63 Undo the retaining screws, withdraw the panel from the facia. Disconnect the wiring connectors from the panel switches to remove the panel completely (photo). 64 A switch bulb can be renewed by untwisting the holder and removing the holder and bulb. 65 A switch unit can be removed from the panel by unscrewing the four retaining screws. 15.59B . . . and disconnect the speedometer cable 15.62 Prise free the trim covers for access to retaining screws . . . 66 Refitting is a reversal of the removal procedure. Ensure that the wiring connections are securely made and check for satisfactory operation of the switches on completion. 75 Fuel consumption is only displayed when the road speed exceeds 8.0 km/h (5.0 mph). 76 The fuel range is only displayed after a road speed of between 25.0 and 70.0 km/h (15.0 to 44.0 mph) has been maintained for at least 90 seconds or at higher speeds for 22 seconds. 77 A reset button is provided, also a display change button (from instant to average or total values). Should the instrument reading exceed 99 hours, 59 minutes or 1000 km (622 miles) depressing the display change button will display all zeros. Depress button E to resume normal function. 78 Refer to the end of the manual for a wiring diagram of the check panel, incorporating the trip master. Heater control panel (later models) removal and refitting Trip master 15.63 . . . and withdraw the auxiliary control panel 15.68 Remove the control knobs . . . ¡ 67 Disconnect the battery negative lead. 68 Pull free the heater/fresh air and blower control knobs (photo). 69 Undo the two retaining screws and withdraw the control panel from the facia (photos). Detach the wiring connectors from the panel illumination lights and remove the panel. 70 Refitting is a reversal of the removal procedure. Ensure that the wiring connections are securely made and on completion check that the operation of the controls is satisfactory. ¡ Interior roof mounted spotlamp, switch and/or clock removal and refitting ¡ 71 This electronic instrument is fitted into the check panel of 1100SL and 1300SL models from 1986. 72 The device provides information on fuel consumption, range, speed and elapsed time. 73 With the ignition key turned to MAR, figures are displayed in respect of the last journey - average fuel consumption, average speed and elapsed time (up to switching off the ignition). 74 As soon as the engine is started, the instrument processes the current values to include fuel consumption, range and the actual time. 79 Disconnect the battery negative lead. 80 Prise free the lamp unit from its aperture in the roof panel using a thin-bladed screwdriver. The lamp bulb can be inspected by untwisting the holder and withdrawing it from the rear of the unit (photos). Extract the bulb from the holder if it requires renewal. 81 To remove the lamp switch from the panel, reach through the lamp aperture and press it free from the roof panel (photo). Detach the wiring connectors. 82 To remove the clock, reach through the lamp aperture and undo the retaining screws (photo). Withdraw the clock and detach the wiring connectors. 15.69A . . . undo the retaining screws (arrowed) 15.69B . . . and withdraw the heater control panel Supplement: Revisions and information on later models 13•109 15.80A Prising free the roof-mounted spotlamp 83 Refitting is a reversal of the removal procedure. Reset the clock on completion. Central door locking system 15.80B Roof-mounted spotlamp bulb removal Cigar lighter (later models) removal and refitting ¡ 84 Certain later models, equipped with a central door locking system, have an infra-red remote control for opening the door locks. 85 It is important that the battery used in the hand control is renewed when necessary with one of identical type (Duracell 7H34). This is only available as a FIAT spare part (No 7595393). 86 The remote control door lock receiver unit can be removed by carefully prising it free from the roof panel and disconnecting the wiring connector (photo). 87 If either this unit or the hand control are renewed at any time, recoding will be necessary and this is a task best entrusted to a FIAT dealer. 88 Pivot back the cover and lift out the ashtray. 89 Undo the retaining screws and remove the trim together with the lighter unit. Detach the wiring connector and release the lighter unit from the panel. 90 Refit in the reverse order of removal. 15.82 Roof-mounted clock retaining screw removal 15.86 Remote control receiver unit removal Electrically operated windozw switches removal and refitting ¡ 91 The window regulator switches on later models are located in the door pull trim. To remove a switch, prise it free from the trim by inserting a thin-bladed screwdriver under the switch flange, then lever it free from its aperture (photo). Take care not to damage the 15.81 Roof-mounted spotlamp switch removal trim. Detach the wiring connector to fully remove the switch. 92 Refit in the reverse order of removal and then check the operation of the switch. Windscreen wiper motor (later models) removal and refitting ™ 93 Disconnect the battery negative lead. 94 Remove the bonnet as described in Chapter 12. 95 Remove the wiper arm and blade as described in Chapter 9, then unscrew and remove the pivot nut (photo). 96 Undo the air inlet grille retaining screws noting that two are not fitted with washers. Where applicable, remove the washer reservoir filler cap from the reservoir neck protruding through the grille. Carefully prise free and lift the air inlet grille clear of the body. 15.91 Prising free the window regulator switch from the armrest 13 15.95 Unscrewing the wiper pivot nut 15.96A Release the air grille from its fixing points . . . 15.96B . . . and detach the windscreen washer hose 13•110 Supplement: Revisions and information on later models 15.98A Remove the wiper motor retaining screws . . . 15.98B . . . separate the wiper motor from its cover . . . As it is lifted, invert it and detach the washer hose from the washer nozzle (photos). 97 Where applicable, detach and remove the washer reservoir from the recess in the front of the windscreen to allow access to the wiper motor. 98 Unscrew and remove the two wiper motor retaining screws. Lower and withdraw the unit, then detach the cover from the motor. Disconnect the wiring from the wiper motor and withdraw it from the car (photos). 99 Refit in the reverse order of removal. Check for satisfactory operation of the wiper and washer on completion. withdraw it from the recess in front of the windscreen so that the wiring connection and the washer supply hoses (to the windscreen washer and the rear screen washer nozzles) can be detached from the pump unit. Remove the reservoir from the vehicle. 105 Refit in the reverse order of removal. If the washer pump unit was detached from the reservoir, use a new seal washer when refitting it. Top up the reservoir and check the screen washers for satisfactory operation before refitting the grille panel and the wiper arm/blade. Brake fluid level sensor Tailgate wiper motor (later models) removal and refitting 112 This is basically a circuit wire embedded in the pad friction material. As the pad wears, the wire is eventually exposed and contacts the disc, whereupon the warning lamp comes on to indicate that pad renewal is necessary. Windscreen washer reservoir (Turbo ie models) removal and refitting ¡ 100 Disconnect the battery negative lead. 101 Remove the bonnet as described in Chapter 12. 102 Remove the wiper arm and blade as described in Chapter 9, then unscrew and remove the pivot nut. 103 Undo the air inlet grille retaining screws noting that two are not fitted with washers. Where applicable, remove the washer reservoir filler cap from the reservoir neck protruding through the grille. Carefully prise free and lift the air inlet grille clear of the body. As it is lifted, invert it and detach the washer hose from the washer nozzle. 104 Syphon any remaining washer fluid from the reservoir, then disconnect it and partially 15.106 Tailgate wiper motor - later model ¡ 106 Although the tailgate wiper motor differs in appearance, its removal and refitting procedures are much the same as those described for the earlier models in Section 27 of Chapter 9 (photo). Radio 107 All later models are now equipped with power supply and speaker leads for radio installation. 108 Installation of the standard FIAT aerial mounted on the windscreen pillar is shown (photos). 15.98C . . . and detach the wiring connector 110 This is mounted in the master cylinder fluid reservoir cap, and comprises a pair of reed switches in a glass bulb, and a magnet at the end of a float. 111 When the fluid level is correct, the magnetic flux closes the switches. In the event of a leak in the system, the magnet moves away, the switches open and the warning lamp comes on. Brake disc pad wear sensor Coolant level sensor 113 This is located in the cooling system expansion tank, and is of the reed switch type, which operates in a similar way to that described for the brake fluid sensor. Engine oil level sensor 109 The locations of the sensors referred to in Chapter 9, Section 34 are given in the following paragraphs, and their construction differs according to their individual function. 114 This is located at the end of the dipstick, and comprises a pair of switches at the end of a bi-metallic strip, heated by electrical resistance. 115 The heat is dissipated by the immersion of the dipstick in the engine oil, so preventing the bi-metallic strip from curving so much that the switches would open. 116 If the oil level drops, the heat is no longer dissipated, the switches open, and the warning lamp comes on. 15.108A Pillar upper screws for aerial 15.108B Pillar lower screw for aerial Check control system sensors description Supplement: Revisions and information on later models 13•111 16.3 Anti-roll bar clamp Door closure sensor 117 The sensor consists of a microswitch within the lock. The switch actuates the warning lamp according to whether the lock is in the open or closed mode. Check control system sensors testing Brake fluid level sensor 118 With the fluid level correct, switch on the ignition and depress the centre of the reservoir cap. If the sensor switches are working correctly, then “FAULT” should be indicated on the check panel. 16.4 Anti-roll bar fixing nuts (arrowed) 16.7 Suspension strut upper mounting nuts, showing bracket and cable clip on the 1372 cc ie model as follows. Firstly loosen off the front roadwheel bolts, then raise the front of the car, securely support it on axle stands and remove the front roadwheels. 2 Disconnect the two gearchange rods from the transmission. 3 Unbolt and disconnect the anti-roll bar insulating clamps from the floorpan (photo). 4 Unbolt the end links from the track control arms and withdraw the anti-roll bar (photo). 5 Refitting is a reversal of removal, but only tighten the nuts and bolts to the specified torque with the car parked on level ground, with four passengers and 40 kg of luggage inside. by using a hot air gun to heat up and fuse a plastic filler rod into the groove. Any excess plastic is then removed and the area rubbed down to a smooth finish. It is important that a filler rod of the correct plastic is used, as body components can be made of a variety of different types (e.g. polycarbonate, ABS, polypropylene). Damage of a less serious nature (abrasions, minor cracks, etc.) can be repaired by the DIY owner using a two-part epoxy filler repair material. Once mixed in equal proportions, this is used in similar fashion to the bodywork filler used on metal panels. The filler is usually cured in twenty to thirty minutes, ready for sanding and painting. 2 If the owner is renewing a complete component himself, or if he has repaired it with epoxy filler, he will be left with the problem of finding a suitable paint for finishing which is compatible with the type of plastic used. At one time the use of a universal paint was not possible owing to the complex range of plastics encountered in body component applications. Standard paints, generally speaking, will not bond to plastic or rubber satisfactorily. However, it is now possible to obtain a plastic body parts finishing kit which consists of a pre-primer treatment, a primer and coloured top coat. Full instructions are normally supplied with a kit, but basically the method of use is to first apply the pre-primer to the component concerned and allow it to dry for up to 30 minutes. Then the primer is applied and left to dry for about an hour before finally applying the special coloured top coat. The result is a correctly coloured component where the paint will flex with the plastic or rubber, a property that standard paint does not normally possess. Coolant level sensor 119 With the coolant level in the expansion tank correct, switch on the ignition and then pull the wiring plug from the sensor. “FAULT” should be indicated on the check panel. If it is not, then it is the panel which is faulty. 120 An ohmmeter should be used to check for continuity, holding the float in both the full and low level positions. Engine oil level sensor 121 With the oil level correct, disconnect the wiring plug from the dipstick, and then bridge the plug terminals (not dipstick side) with a 12 ohm resistor. Switch on the ignition. 122 If the red light on the check panel goes out, then the fault is due to the sensor. 123 If the light stays on, then it is the check panel module which is faulty. Door closure sensor 124 Any fault in the lock microswitch can best be detected using an ohmmeter. 16 Suspension Front anti-roll bar removal and refitting ™ 1 A front anti-roll bar is fitted to the 1301 cc, 1372 cc ie and 1372 cc Turbo ie engined models. Removal of the bar on all models is Suspension strut - later models 6 The suspension strut upper mounting nuts on later models also secure the brackets for the mounting of ancillary components such as the fuel filter, fuel system relays and fuses, etc. (depending on model). 7 When removing the suspension strut units, it will therefore be necessary to detach and support these brackets and their fittings (photo). 17 Bodywork Plastic components 1 With the use of more and more plastic body components by the vehicle manufacturers (e.g. bumpers, spoilers, and in some cases major body panels), rectification of more serious damage to such items has become a matter of either entrusting repair work to a specialist in this field, or renewing complete components. Repair of such damage by the DIY owner is not really feasible owing to the cost of the equipment and materials required for effecting such repairs. The basic technique involves making a groove along the line of the crack in the plastic using a rotary burr in a power drill. The damaged part is then welded back together Rear view mirrors ¡ Interior 3 The mirror is of safety type, “breaking” off its ball fixing upon impact from a front seat occupant. 4 To remove the mirror, grip the head and 13 13•112 Supplement: Revisions and information on later models 17.4 Interior mirror base 17.5 Interior mirror mounting plate 17.7A Exterior mirror trim plate push it towards the windscreen; the ball socket will release (photo). 5 Extract the screws from the mounting plate (photo). 6 When refitting the mirror, engage the front of the socket on the ball and then twist the mirror rearwards and upwards. models. This is simply secured by two self-tapping screws (photo). Exterior Tailgate (Turbo ie model) component removal and refitting ¡ 17.8 Extracting the mirror balljoint screw 17.9 Door armrest 10 The tailgate on these models is of plastic injection-moulded type, with a bonded window glass. 11 Renewal of the glass or repair of the tailgate should be entrusted to your FIAT dealer or a specialist repairer, due to the need for special products and techniques. 12 To remove the tailgate lock and handle, open the tailgate and extract the lock handle screws. 13 Prise off the link rod socket from the ball-pin (photos). Unbolt and remove the handle and lock. 14 A remote type of tailgate release is fitted, with a control handle located by the driver’s seat. Access to the handle can be obtained by removing the seat and sill trim, and peeling back the carpet. 15 If a new cable is to be fitted, disconnect it from the tailgate latch, tape the new cable to the old one, and draw it carefully around the side panel and sill trim (photo). 16 To remove the tailgate wiper motor, first take off the wiper arm and blade. 17 Extract the plastic clips and take off the wiper motor protective cover. Disconnect, unbolt, and remove the wiper motor (photo). 17.13 Tailgate handle link rod (arrowed) 17.15 Tailgate release cable (arrowed) 17.17 Tailgate wiper motor 7 On models without remotely-controlled type exterior mirrors, the ball-jointed mirror is held in position by the two self-tapping screws which secure the triangular trim plate inside the car (photos). 8 To dismantle the mirror, extract the balljoint fixing screw, but take care as considerable force is exerted by the interior coil spring (photo). 17.7B Withdrawing the exterior mirror Door armrest ¡ 9 A redesigned armrest is used on some Supplement: Revisions and information on later models 13•113 17.19A Extracting a radiator grille screw 17.19B Prising down a radiator grille clip 18 Refitting of all components is a reversal of removal. bolts and captive nuts but to reach them, the underwing shields must be released and pulled away. 26 Disconnect the leads from the auxiliary lamps which are mounted in the spoiler, and then lift the bumper/spoiler from the car. Radiator grille (1301 cc Turbo ie model) removal and refitting ¡ 19 The grille is secured by a central screw and two upper clips. Use a screwdriver to prise the tabs on the upper clips downwards (photos). 20 Lift the grille upwards and forwards to disengage its lower mountings (photo). 21 Refitting is a reversal of removal. Radiator grille (1372 cc ie and 1372 cc Turbo ie models) - removal and refitting ¡ 17.20 Removing the radiator grille from a 1301 cc Turbo ie model Refitting - front and rear 30 Refitting either front or rear bumpers is a reversal of removal. Rear hinged windows removal and refitting ™ 27 Open the tailgate to provide access to the bumper upper mounting screws. 28 Disconnect the leads from the rear number plate lamp. Unscrew the lower mounting nuts (photo). 29 Disconnect the bumper end fixings, which are accessible under the rear wing edges (photo). 31 These have toggle-type catches and hinges bolted directly through the glass (photo). 32 To remove the window glass, have an assistant support it, and then unscrew the cross-head hinge screws and the toggle catch anchor plate screws. Lift the glass away. If the toggle catch must be removed from the glass, first drive out the handle pivot pin and then, using a pin wrench or circlip pliers, unscrew 17.22 Radiator grille screw removal on a 1372 cc SX ie model 17.24 Front bumper upper mounting screw (arrowed) Removal - rear 22 The radiator grille on these models is secured by screws at the top edge (photo). Raise and support the bonnet. Undo the retaining screws, then lift the grille clear. 23 Refit in the reverse order of removal. Bumpers (1301 cc Turbo ie, 1372 cc ie and 1372 cc Turbo ie models) removal and refitting ¡ Removal - front 24 Remove the radiator grille as previously described, to provide access to the bumper upper mounting screws (photo). 25 The ends of the bumpers are secured with 13 17.28 Rear bumper lower mounting nut 17.29 Unscrewing a bumper end fixing nut 17.31 Rear window toggle-type catch 13•114 Supplement: Revisions and information on later models 17.34A Armrest electric window switches the ring nut which secures the handle to the glass. 33 When refitting the screws or ring nut to the glass, make sure that the insulating washers are in good condition to prevent metal-to-glass contact. 17.34B Disconnecting an electric window regulator switch plug Door trim panel (Turbo ie model) removal and refitting ¡ 34 The operations are similar to those described in Chapter 12, Section 11, except that electric windows are fitted instead of a 17.34C Door interior showing electric window motor (arrowed) conventional mechanical regulator and handle. Before the trim panel can be withdrawn, the window control switches must be disconnected from the wiring plug, and the plug fed through the panel aperture (photos). Wiring diagrams 14•1 Component key for wiring diagrams 1 to 29 Note: Not all the items listed will be fitted to all models No 00200 00500 01001 01202 01203 01206 01207 01252 01253 01254 01255 01400 01401 01420 01500 01502 01504 02001 02010 02011 02012 02013 02015 02210 02215 02400 02405 02490 02492 03000 03002 03003 03004 03005 03006 03007 03008 03028 03029 03034 03035 03036 03053 03059 03060 03110 03114 03123 03142 03144 03145 03305 03306 Description Alternator with built-in regulator Battery Starter motor Rear front electric window motor Left front electric window motor Windscreen wiper motor Rear screen wiper motor Right front door locking motor Left front door locking motor Right rear door locking motor Left rear door locking motor Windscreen washer pump Rear screen washer pump Electric fuel pump Engine cooling fan Injector cooling fan Ventilation fan Engine cut-out solenoid on injection pump Fuel injector Fuel injector Fuel injector Fuel injector Supplementary air valve Accelerator pump outlet cut-out solenoid on carburettor Supplementary air valve Ignition coil Ignition coil with electronic control unit Static advance ignition control unit Microplex ignition system control unit Insufficient engine oil pressure switch Right front door ajar switch Left front door ajar switch Right rear door ajar switch Left rear door ajar switch Handbrake ‘on’ warning switch Brake stop-lamp switch Reversing light switch Radiator thermostatic switch Coolant overheating warning light thermostatic switch Injector cooling fan thermostatic switch Accelerator pump outlet cut-out solenoid thermostatic switch Radiator thermostatic switch with two operating ranges Map reading light switch Foglamps switch Rear foglamp switch Heated rear screen switch Ventilation fan switch Air pressure switch Choke warning light switch Reset switch Display switch Right front door open light push button Left front door open light push button No 03319 03500 03505 03506 03530 03531 03546 03550 04010 04022 04032 04214 04215 04225 04241 04260 04283 04291 04292 04441 04700 04701 04720 05008 05009 05013 05015 05016 05410 05411 05412 05413 05640 05690 05691 06000 06026 06076 06080 06084 06300 06305 06310 06311 06315 06320 06335 06336 06343 06344 06345 06350 Description Horn push button Ignition switch Butterfly valve cut-off switch Throttle position switch Right front electric window switch Left front electric window switch Rear screen wash/wipe switch Hazard warning lights switch Steering column switch unit, direction indicators Steering column switch unit, headlamps, main beam and dipped, side lights Steering column switch unit, windscreen wash/wipe Fuel injection system control relay Antiskid system failure relay Radiator fan 2nd speed engagement relay feed Foglamps relay feed Electric windows motor relay feed Antiskid system relay Horn relay feed Heated rear screen relay feed Dim-dip cut-out 04600 Ignition distributor Coolant temperature sender unit Electronic injection coolant temperature sender unit Oil pressure sender unit Right headlamp, main beam and dipped with side light Left headlamp, main beam and dipped with side light Abnormal fuel consumption sensor Right foglamp Left foglamp Right front direction indicator Left front direction indicator Right front side direction indicator Left front side direction indicator Rear number plate lamp Right rear light cluster, sidelight, direction indicator, brake light, rear foglamp Left rear light cluster; side light, direction indicator, brake light, rear foglamp Centre courtesy light Map reading light Ideogram fibre optic light Heater controls light Instrument panel light Sidelights warning light Main beam headlamps warning light Rear foglamps warning light Foglamps warning light Hazard warning lights warning light Direction indicators warning light Insufficient brake fluid level warning light Handbrake ‘on’ warning light Insufficient engine oil pressure warning light Insufficient brake fluid level warning light Fuel reserve warning light Coolant overheating warning light 14 14•2 Wiring diagrams Component key for wiring diagrams 1 to 29 (continued) Note: Not all the items listed will be fitted to all models No 06355 06365 06368 06385 06800 06801 06802 07000 07001 07003 07015 07016 07020 07021 07022 07023 07037 07050 07051 07052 07060 07107 07109 07191 07192 07400 07410 07415 07420 07430 07460 07461 Description Battery charging warning light Choke warning light Antiskid system failure lamp Heated rear screen warning light Horn Right horn Left horn Coolant level sensor Engine oil level sensor Brake fluid level sensor Right front brake pad wear sensor Left front brake pad wear sensor Engine speed sensor TDC sensor Anti-knock sensor Diagnostic socket Butterfly valve (cut-off) switch Fuel gauge Instant fuel consumption gauge (econometer) Airflow meter Idle cut-off device Roadwheel speed sensors Vacuum switch Absolute pressure sensor Vacuum switch Fuel gauge Engine oil temperature gauge Coolant temperature gauge Engine oil pressure gauge Tachometer Clock Digital clock No Description 08051 Ignition coil condenser 09000 Dim-dip transformer 09008 Radiator cooling fan 1st speed resistor 09100 Heated rear screen 10022 Cut-off device electronic control unit 10500 Control (fuse) box 10515 Electronic injection control unit 10571 Central locking control unit 10584 Antiskid system ECU 10586 Pressure modulators 59000 Cigar lighter 60000 Instrument panel 60204 Four place fusebox 70090 General earth 70091 General earth 70092 Earth plate M Electronic control unit Wire colour codes A Light blue B White C Orange G Yellow H Grey L Blue M Brown N Black R Red S Pink V Green Z Violet Example of two-colour wire: BN (White/Black) Wiring diagram 2 - starting, charging, oil pressure and low brake fluid (Comfort and ES models) Wiring diagrams 14•3 Wiring diagram 1 - starting, ignition, charging, oil pressure, low brake fluid, choke warning light and handbrake “on” (S and SX models) 14 14•4 Wiring diagrams Wiring diagram 3 - direction indicators, hazard warning lamps, brake stoplamps and horn (S and SX models) Wiring diagram 4 - direction indicators, hazard warning lamps, brake stoplamps and horn (Comfort and ES) Wiring diagram 6 - electronic ignition, fuel cut-off device and economy gauge (ES models) Wiring diagrams 14•5 Wiring diagram 5 - front parking lamps, rear number plate lamp and fuel gauge (Comfort, ES, S and SX models) 14 14•6 Wiring diagrams Wiring diagram 7 - headlamps, reversing lamps and front and rear foglamps (SX model) Wiring diagram 8 - headlamps, reversing lamps and rear foglamps (Comfort, ES and S models) Wiring diagram 10 - windscreen wash/wipe, radiator fan and coolant temperature sensor (Comfort and ES models) Wiring diagrams 14•7 Wiring diagram 9 - windscreen wash/wipe, radiator fan, coolant temperature sensor, heated rear screen and instrument panel illumination 14 14•8 Wiring diagrams Wiring diagram 11 - courtesy lamps, heater fan, heater illumination, cigar lighter, digital clock and radio (S and SX models) Wiring diagram 12 - courtesy lamps, heater fan and heater illumination (Comfort and ES models) Wiring diagram 14 - tachometer, digital clock, map reading lamp and vacuum gauge (Comfort, ES, S and SX models) Wiring diagrams 14•9 Wiring diagram 13 - heated rear screen and rear wash/wipe (S and SX models) 14 14•10 Wiring diagrams Wiring diagram 15 - central door locking and electric windows (S and SX models) Wiring diagram 16 - headlamp dim-dip system (1987-on models) Wiring diagrams 14•11 14 Wiring diagram 17 - check panel (S and SX models) 14•12 Wiring diagrams Wiring diagram 18 - check panel with trip master (SL model) Wiring diagrams 14•13 Wiring diagram 19 - ignition and idle cut-out (later 45 models) 14 Wiring diagram 20 - ignition cut-off device, tachometer and accelerator pump cut-out (60 and 70 models) 14•14 Wiring diagrams Wiring diagram 21 - starting, charging, Microplex ignition, LE-2 Jetronic fuel injection, fuel pump and fuel injector cooling fan (1301 cc Turbo ie model) Wiring diagram 23 - courtesy lamps, heater fan, heater illumination, cigar lighter, digital clock, radio, low oil pressure lamp, oil pressure switch, oil temperature gauge and tachometer (1301 cc Turbo ie model) Wiring diagrams 14•15 Wiring diagram 22 - direction indicators, hazard warning lamps, brake stoplamps, horn and low brake fluid sensor (1301 cc Turbo ie model) 14 14•16 Wiring diagrams Wiring diagram 24 - dipped headamps, headlamp main beam, foglamps (front and rear) and reversing lamps (1301 cc Turbo ie model) Wiring diagram 25 - front parking lamps, rear number plate lamp, fuel gauge and low level warning lamp, and instrument panel illumination (1301 cc Turbo ie model) Wiring diagram 27 - electric windows (1301 cc Turbo ie model) Wiring diagrams 14•17 Wiring diagram 26 - windscreen wash/wipe, radiator fan, heated rear screen, instrument panel fibre optic, coolant temperature gauge and rear screen wash/wipe (1301 cc Turbo ie model) 14 14•18 Wiring diagrams Wiring diagram 28 - check panel (1301 cc Turbo ie model) Wiring diagrams 14•19 14 Wiring diagram 29 - Antiskid braking system (1301 cc Turbo ie model - where fitted) 14•20 Wiring diagrams Component key for wiring diagrams 30 to 52 Note: Not all the items listed will be fitted to all models No 1 2 3 4 5 6 6A 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 Description Injector cooling fan Left front light cluster Left foglamp Left front engine compartment earth Radiator cooling fan Double contact thermostatic switch on engine radiator Thermostatic switch on engine radiator Left horn Right horn Resistor for engaging radiator fan 1st speed Right front light cluster Right foglamp Right front engine compartment earth Battery Ignition coil Ignition distributor with magnetic impulse generator Left front side direction indicator Ignition power module MPi electronic injection control unit Join between injection/ignition cables in engine compartment Battery cables join in engine compartment Antiskid braking system wiring join Starting go-ahead relay Earth for battery Radiator coolant temperature sender unit for electronic injection Anti-knock sensor Injection system diagnostic socket Switch signalling insufficient engine oil pressure Radiator coolant temperature sender unit Engine oil temperature sender unit Engine oil pressure sender unit Right front side direction indicator Engine oil temperature sender unit cable join Battery recharging signal cable join Windscreen washer pump Rear screen washer pump Reversing switch Fuel injectors relay feed Insufficient brake fluid level sensor Left brake pad wear sensor Microplex electronic ignition control unit Injection cables join in engine compartment Ignition cables join in engine compartment Join between battery cable and injection cables Join between engine cable and battery cables Left front brake pad cables join Starter motor No 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 Description Windscreen wiper motor Headlamp washer pump Fuel injector Fuel injector Fuel injector Fuel injector Supplementary air valve Spark plug Spark plug Spark plug Spark plug Excess supercharging pressure switch Throttle position switch Engine speed sensor Ignition diagnostic socket Connector block Connector block Alternator Thermostatic switch for injector cooling fan Right brake pad wear sensor TDC sensor Connector block Connector block Connector block Connector block Join with right brake pad cables Electronic earth Power earth Brake stop-lamp switch 20 A fuse for central locking 10 A fuse for electric fuel pump 30 A fuse for radiator cooling fan 30 A fuse for electric windows 10 A fuse for injector cooling fan 20 A fuse for headlamp wash/wipe 20 A fuse for foglamps Junction box with fuses and relays: E1 Horn relay (for single tone horns bridge between 86 and 87) E2 Heated rear screen relay E3 Heater (bridge between 85 and 30) Join between front cable and rear cables Join between front cable and door ajar sensor cables Earth on dashboard, left hand side Earth on dashboard, right hand side Choke warning light switch Ignition switch Hazard warning lights switch Steering column switch unit A Rear screen wash/wipe switch B Horn button C Direction indicators switch D Windscreen wiper intermittent speed selector switch E Windscreen/headlamp washer control switch No 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 Description F Rear foglamps/headlamp washer intermittent device switch G Headlamp dip switch H External lights switch I Flasher switch Foglamp relay Electric fuel pump relay Electric windows relay feed Headlamp wash/wipe intermittent device Direction indicators/hazard warning lights flasher unit Central locking receiver Central locking control unit Join with brake pad cables Join between engine cable and dashboard cables Automatic heater cable join Instrument panel A Foglamps warning light B Main beam headlamps warning light C Side lights warning light D Rear foglamps warning light E Heated rear screen warning light F Hazard warning lights warning light G Direction indicators warning light H Handbrake applied and insufficient brake fluid level warning light I Choke warning light K Instrument panel light bulbs L Battery recharging warning light M Insufficient engine oil pressure warning light O Antiskid braking system failure warning light P Maximum turbocharging pressure warning light Q Brake pad wear warning light R Door ajar warning light U Fuel level gauge V Engine oil pressure gauge W Engine oil temperature gauge Y Tachometer Z Coolant temperature gauge Join with remote control central locking cables Cigar lighter Radio receiver Heater unit Switch unit A Heated rear screen switch B Rear foglamps switch C Switch unit light bulb D Rear screen wiper switch E Foglamps switch F Clock Left front electric window motor Left front central locking geared motor Switch signalling left front door ajar Wiring diagrams 14•21 Component key for wiring diagrams 30 to 52 (continued) Note: Not all the items listed will be fitted to all models No Description 111 Push button on left front pillar for centre courtesy light 112 Front electric windows switch panel, driver’s side 113 Join between dashboard cable and adjustable map reading light cables 114 Join with left front electric window cables 115 Join between dashboard cable and rear cables 116 Join between rear cable and courtesy light cables 117 Left front speaker 118 Handbrake ‘on’ switch 119 Centre courtesy light bulb 119A Adjustable map reading light on rear view mirror 120 Right front electric window motor 121 Right front central locking geared motor 122 Switch signalling right front door ajar 123 Push button on right front pillar for centre courtesy light 124 Electric windows control panel, passenger side 125 Fuel level gauge 126 Join with right front electric window cables 127 Join between engine cable and dashboard cables 128 Right front speaker 129 Left rear light cluster 130 Join between rear cable and luggage compartment courtesy light 131 Windscreen washer pump wiring join 132 Rear screen washer pump wiring join 133 Left rear earth 134 Rear screen wiper motor 135 Electric fuel pump 136 Rear number plate lamp 137 Heated rear screen 138 Right rear light cluster 139 Rear foglamp go-ahead switch 140 Join between front cable and antiskid brakes cables 141 Join between front cable and antiskid brakes cables 142 25 A fuse for antiskid brakes 143 Antiskid braking system control unit 144 Left modulator for antiskid brakes 145 Right modulator for antiskid brakes 146 Sensor on left front wheel 147 Sensor on right front wheel 148 10A fuse for antiskid braking system 149 Vacuum switch for antiskid braking system 150 Antiskid braking system engagement relay 151 Antiskid braking system failure signalling switch 152 Digiplex electronic ignition control unit No Description 153 Bosch SPi Mono-Jetronic injection system control unit 155 Join between engine cable and injection cables 156 Join between engine cable and rear cables for SPi system 157 Idle adjustment actuator 158 Throttle position switch 159 Injector current restriction resistor (SPi) 162 Engine cut-out solenoid 163 Idle cut-out solenoid valve 168 Tachometer electro-magnetic sensor 169 Automatic heater control unit 170 Heater fan 171 Outside temperature sensor 172 Mixed air temperature sensor 173 Air mixture flap electrical control motor 174 Diagnostic socket for automatic heater 175 Connector block 176 Connector block 177 Join with cables for automatic heater 178 Radiator coolant circulation solenoid valve 179 Automatic heater unit: A Temperature control potentiometer B Fan speed control potentiometer C Heater controls light bulbs D Ideogram signalling automatic function engaged E Automatic function engaged switch 180 Horn 181 Check Panel: A Insufficient engine oil level warning light B Insufficient coolant level warning light C Failure with side lights/rear foglamp/rear number plate light/braking lights warning light D Insufficient brake fluid level warning light E Door ajar warning light F Brake pad wear warning light 182 Earth on dashboard 183 Join with cables for central locking 184 Join with cables for central locking 185 Left rear central locking geared motor 186 Right rear central locking geared motor 187 Contact on choke lever 188 Resistor for inlet manifold heating 189 Pre-heating thermal switch 191 Heated Lambda sensor 192 Lambda sensor protective fuse 193 Silicon diode 194 Join between front cable and injection cable 197 Connector block No 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 225 226 227 228 229 230 231 232 233 234 235 236 237 Description Rear cable join Insufficient engine oil level sensor Insufficient coolant level sensor Switch signalling left rear door ajar Switch signalling right rear door ajar Switch on gear selector Light for gear selector panel signalling gear engaged Parking signal not on Connector block Join in engine compartment with injection cables Petrol vapour cut out-solenoid valve Petrol vapour cut out-solenoid valve Airflow meter Speedometer relay LE2 Jetronic electronic injection control unit Connector block Connector block Connector block Ignition cable join Join between front cable and emission control cable Join between front cable and battery cable Injection system air temperature sensor Ignition control unit relay feed Front cable join Front cable join Dim-dip circuit cut out switch Dim-dip circuit resistance Dim-dip circuit 7.5 A protective fuse Driver’s side seat heated pad Driver’s seat backrest heated pad 10 A protective fuse for driver’s seat heated pads Foglamps go-ahead switch Driving lights cut out switch Dipped headlamps relay Main beam headlamps relay Join between engine cable and dashboard cables Wire colour codes A Light blue B White C Orange G Yellow H Grey L Blue M Brown N Black R Red S Pink V Green Z Violet Example of two-colour wire: BN (White/Black) 14 14•22 Wiring diagrams * To the rev counter (only for the 999 SX – 1108 SX) ** Non-existent for the 903 Wiring diagram 30 - starting, charging, ignition, low oil pressure and choke warning lamps (1990-on 45, and 55 models) Wiring diagrams 14•23 * To the rev counter Wiring diagram 31 - starting, charging, Digiplex 2 ignition, SPi fuel injection, fuel pump and low oil pressure (1990-on 70 SX and 1.4 models) 14 14•24 Wiring diagrams * To the rev counter ** Only for the 1372 Turbo with A.B.S. (AP) Wiring diagram 32 - starting, charging, Microplex ignition, MPi fuel injection, fuel pump and low oil pressure (1372 cc Turbo ie model) Wiring diagrams 14•25 * Only for 1372 S ie – 1372 SX ie Wiring diagram 33 - parking lamps, main/dipped headlamps, headlamp flasher and rear number plate lamp (1990-on 45, 55, 70 and 1.4 models) 14 14•26 Wiring diagrams * Only for 1116 S (CTX) and 1372 (CTX) versions ** Only for 1116 S (CTX) and 1372 Turbo ie versions Wiring diagram 34 - parking lamps, main/dipped headlamps, headlamp flasher and rear number plate lamp (1372 cc Turbo ie models) Wiring diagrams 14•27 14 Wiring diagram 35 - direction indicators, hazard warning lamps, reversing lamps and brake stop-lamps (1990-on 45, 55, 70 and 1.4 models) 14•28 Wiring diagrams Wiring diagram 36 - direction indicators, hazard warning lamps, reversing lamps and brake stop-lamps (1372 cc Turbo ie model) Wiring diagrams 14•29 14 Wiring diagram 37 - rear foglamps (1990-on 45 and 55 models) 14•30 Wiring diagrams Wiring diagram 38 - front and rear foglamps (1990-on 70 SX and 1.4 models) Wiring diagrams 14•31 14 Wiring diagram 39 - front and rear foglamps (1372 cc Turbo ie model) 14•32 Wiring diagrams Wiring diagram 40 - courtesy lamps and instrument panel lamps (1990-on 45, 55, 70 and 1.4 models) Wiring diagrams 14•33 14 Wiring diagram 41 - courtesy lamps and instrument panel lamps (1372 cc Turbo ie model) 14•34 Wiring diagrams Wiring diagram 42 - horns, heated rear screen and windscreen/rear screen wash/wipe (1990-on 45 and 55 models) Wiring diagrams 14•35 14 Wiring diagram 43 - horns, heated rear screen and windscreen/rear screen wash/wipe (1990-on 70 SX and 1.4 models) 14•36 Wiring diagrams Wiring diagram 44 - horns, heated rear screen, windscreen/rear screen wash/wipe and headlamp wash/wipe (1372 cc Turbo ie model) Wiring diagrams 14•37 14 Wiring diagram 45 - radiator cooling fan, heater, radio and cigar lighter (1990-on 45, 55, 70 and 1.4 models) 14•38 Wiring diagrams Wiring diagram 46 - radiator cooling fan, heater, radio and cigar lighter (1372 cc Turbo ie model) Wiring diagrams 14•39 *Only for 1372 S ie – 1372 SX ie – 1697 D ** Only for D versions s Only for SX versions 14 Wiring diagram 47 - fuel gauge, tachometer, digital clock, brake fluid and handbrake warning lamp (1990-on 45, 55, 70 and 1.4 models) 14•40 Wiring diagrams Wiring diagram 48 - fuel gauge, tachometer, digital clock, brake fluid level sensor, handbrake-on switch, brake pad wear sensor, door ajar switch and oil pressure/temperature sender units (1372 cc Turbo ie model) Wiring diagrams 14•41 14 Wiring diagram 49 - electric windows and central locking (1990-on 3-door models) 14•42 Wiring diagrams Wiring diagram 50 - electric windows and central locking (1990-on 5-door models) Wiring diagrams 14•43 14 Wiring diagram 51 - Antiskid braking system (1372 cc Turbo ie model - where fitted) 14•44 Wiring diagrams Wiring diagram 52 - check panel (1990-on 5-door models (3-door similar) MOT Test Checks REF•1 This is a guide to getting your vehicle through the MOT test. Obviously it will not be possible to examine the vehicle to the same standard as the professional MOT tester. However, working through the following checks will enable you to identify any problem areas before submitting the vehicle for the test. Where a testable component is in borderline condition, the tester has discretion in deciding whether to pass or fail it. The basis of such discretion is whether the tester would be happy for a close relative or friend to use the vehicle with the component in that condition. If the vehicle presented is clean and evidently well cared for, the tester may be more inclined to pass a borderline component than if the vehicle is scruffy and apparently neglected. It has only been possible to summarise the test requirements here, based on the regulations in force at the time of printing. Test standards are becoming increasingly stringent, although there are some exemptions for older vehicles. For full details obtain a copy of the Haynes publication Pass the MOT! (available from stockists of Haynes manuals). An assistant will be needed to help carry out some of these checks. The checks have been sub-divided into four categories, as follows: 1 1 Checks carried out FROM THE DRIVER’S SEAT 2 Checks carried out WITH THE VEHICLE ON THE GROUND 3 Checks carried out WITH THE VEHICLE RAISED AND THE WHEELS FREE TO TURN 4 Checks carried out on YOUR VEHICLE’S EXHAUST EMISSION SYSTEM Checks carried out FROM THE DRIVER’S SEAT Handbrake M Test the operation of the handbrake. Excessive travel (too many clicks) indicates incorrect brake or cable adjustment. M Check that the handbrake cannot be released by tapping the lever sideways. Check the security of the lever mountings. M Check that the brake pedal is secure and in good condition. Check also for signs of fluid leaks on the pedal, floor or carpets, which would indicate failed seals in the brake master cylinder. M Check the servo unit (when applicable) by operating the brake pedal several times, then keeping the pedal depressed and starting the engine. As the engine starts, the pedal will move down slightly. If not, the vacuum hose or the servo itself may be faulty. Footbrake M Depress the brake pedal and check that it does not creep down to the floor, indicating a master cylinder fault. Release the pedal, wait a few seconds, then depress it again. If the pedal travels nearly to the floor before firm resistance is felt, brake adjustment or repair is necessary. If the pedal feels spongy, there is air in the hydraulic system which must be removed by bleeding. movement of the steering wheel, indicating wear in the column support bearings or couplings. Windscreen and mirrors M The windscreen must be free of cracks or other significant damage within the driver’s field of view. (Small stone chips are acceptable.) Rear view mirrors must be secure, intact, and capable of being adjusted. Steering wheel and column M Examine the steering wheel for fractures or looseness of the hub, spokes or rim. M Move the steering wheel from side to side and then up and down. Check that the steering wheel is not loose on the column, indicating wear or a loose retaining nut. Continue moving the steering wheel as before, but also turn it slightly from left to right. M Check that the steering wheel is not loose on the column, and that there is no abnormal REF REF•2 MOT Test Checks Electrical equipment M Switch on the ignition and check the operation of the horn. M Check the windscreen washers and wipers, examining the wiper blades; renew damaged or perished blades. Also check the operation of the stop-lights. M Inspect both front brake flexible hoses for cracks or deterioration of the rubber. Turn the steering from lock to lock, and ensure that the hoses do not contact the wheel, tyre, or any part of the steering or suspension mechanism. With the brake pedal firmly depressed, check the hoses for bulges or leaks under pressure. Seat belts and seats Note: The following checks are applicable to all seat belts, front and rear. M Examine the webbing of all the belts (including rear belts if fitted) for cuts, serious fraying or deterioration. Fasten and unfasten each belt to check the buckles. If applicable, check the retracting mechanism. Check the security of all seat belt mountings accessible from inside the vehicle. M The front seats themselves must be securely attached and the backrests must lock in the upright position. Doors M Both front doors must be able to be opened and closed from outside and inside, and must latch securely when closed. 2 Checks carried out WITH THE VEHICLE ON THE GROUND Vehicle identification M Number plates must be in good condition, secure and legible, with letters and numbers correctly spaced – spacing at (A) should be twice that at (B). M Check the operation of the sidelights and number plate lights. The lenses and reflectors must be secure, clean and undamaged. M Check the operation and alignment of the headlights. The headlight reflectors must not be tarnished and the lenses must be undamaged. M Switch on the ignition and check the operation of the direction indicators (including the instrument panel tell-tale) and the hazard warning lights. Operation of the sidelights and stop-lights must not affect the indicators - if it does, the cause is usually a bad earth at the rear light cluster. M Check the operation of the rear foglight(s), including the warning light on the instrument panel or in the switch. Footbrake M Examine the master cylinder, brake pipes and servo unit for leaks, loose mountings, corrosion or other damage. Steering and suspension M Have your assistant turn the steering wheel from side to side slightly, up to the point where the steering gear just begins to transmit this movement to the roadwheels. Check for excessive free play between the steering wheel and the steering gear, indicating wear or insecurity of the steering column joints, the column-to-steering gear coupling, or the steering gear itself. M Have your assistant turn the steering wheel more vigorously in each direction, so that the roadwheels just begin to turn. As this is done, examine all the steering joints, linkages, fittings and attachments. Renew any component that shows signs of wear or damage. On vehicles with power steering, check the security and condition of the steering pump, drivebelt and hoses. M Check that the vehicle is standing level, and at approximately the correct ride height. Shock absorbers M Depress each corner of the vehicle in turn, then release it. The vehicle should rise and then settle in its normal position. If the vehicle continues to rise and fall, the shock absorber is defective. A shock absorber which has seized will also cause the vehicle to fail. M The VIN plate and/or homologation plate must be legible. M The fluid reservoir must be secure and the fluid level must be between the upper (A) and lower (B) markings. MOT Test Checks Exhaust system M Start the engine. With your assistant holding a rag over the tailpipe, check the entire system for leaks. Repair or renew leaking sections. Front and rear suspension and wheel bearings M Starting at the front right-hand side, grasp the roadwheel at the 3 o’clock and 9 o’clock positions and shake it vigorously. Check for free play or insecurity at the wheel bearings, suspension balljoints, or suspension mountings, pivots and attachments. M Now grasp the wheel at the 12 o’clock and 6 o’clock positions and repeat the previous inspection. Spin the wheel, and check for roughness or tightness of the front wheel bearing. REF•3 M The same general checks apply to vehicles fitted with other suspension types, such as torsion bars, hydraulic displacer units, etc. Ensure that all mountings and attachments are secure, that there are no signs of excessive wear, corrosion or damage, and (on hydraulic types) that there are no fluid leaks or damaged pipes. M Inspect the shock absorbers for signs of serious fluid leakage. Check for wear of the mounting bushes or attachments, or damage to the body of the unit. Driveshafts (fwd vehicles only) M Rotate each front wheel in turn and inspect the constant velocity joint gaiters for splits or damage. Also check that each driveshaft is straight and undamaged. 3 Checks carried out WITH THE VEHICLE RAISED AND THE WHEELS FREE TO TURN Jack up the front and rear of the vehicle, and securely support it on axle stands. Position the stands clear of the suspension assemblies. Ensure that the wheels are clear of the ground and that the steering can be turned from lock to lock. Steering mechanism M Have your assistant turn the steering from lock to lock. Check that the steering turns smoothly, and that no part of the steering mechanism, including a wheel or tyre, fouls any brake hose or pipe or any part of the body structure. M Examine the steering rack rubber gaiters for damage or insecurity of the retaining clips. If power steering is fitted, check for signs of damage or leakage of the fluid hoses, pipes or connections. Also check for excessive stiffness or binding of the steering, a missing split pin or locking device, or severe corrosion of the body structure within 30 cm of any steering component attachment point. M If excess free play is suspected at a component pivot point, this can be confirmed by using a large screwdriver or similar tool and levering between the mounting and the component attachment. This will confirm whether the wear is in the pivot bush, its retaining bolt, or in the mounting itself (the bolt holes can often become elongated). Braking system M If possible without dismantling, check brake pad wear and disc condition. Ensure that the friction lining material has not worn excessively, (A) and that the discs are not fractured, pitted, scored or badly worn (B). M Carry out all the above checks at the other front wheel, and then at both rear wheels. Springs and shock absorbers M Examine the suspension struts (when applicable) for serious fluid leakage, corrosion, or damage to the casing. Also check the security of the mounting points. M If coil springs are fitted, check that the spring ends locate in their seats, and that the spring is not corroded, cracked or broken. M If leaf springs are fitted, check that all leaves are intact, that the axle is securely attached to each spring, and that there is no deterioration of the spring eye mountings, bushes, and shackles. M Examine all the rigid brake pipes underneath the vehicle, and the flexible hose(s) at the rear. Look for corrosion, chafing or insecurity of the pipes, and for signs of bulging under pressure, chafing, splits or deterioration of the flexible hoses. M Look for signs of fluid leaks at the brake calipers or on the brake backplates. Repair or renew leaking components. M Slowly spin each wheel, while your assistant depresses and releases the footbrake. Ensure that each brake is operating and does not bind when the pedal is released. REF REF•4 MOT Test Checks M Examine the handbrake mechanism, checking for frayed or broken cables, excessive corrosion, or wear or insecurity of the linkage. Check that the mechanism works on each relevant wheel, and releases fully, without binding. M It is not possible to test brake efficiency without special equipment, but a road test can be carried out later to check that the vehicle pulls up in a straight line. Fuel and exhaust systems M Inspect the fuel tank (including the filler cap), fuel pipes, hoses and unions. All components must be secure and free from leaks. M Examine the exhaust system over its entire length, checking for any damaged, broken or missing mountings, security of the retaining clamps and rust or corrosion. properly seated, and that the wheel is not distorted or damaged. M Check that the tyres are of the correct size for the vehicle, that they are of the same size and type on each axle, and that the pressures are correct. M Check the tyre tread depth. The legal minimum at the time of writing is 1.6 mm over at least three-quarters of the tread width. Abnormal tread wear may indicate incorrect front wheel alignment. Body corrosion M Check the condition of the entire vehicle structure for signs of corrosion in load-bearing areas. (These include chassis box sections, side sills, cross-members, pillars, and all suspension, steering, braking system and seat belt mountings and anchorages.) Any corrosion which has seriously reduced the thickness of a load-bearing area is likely to cause the vehicle to fail. In this case professional repairs are likely to be needed. M Damage or corrosion which causes sharp or otherwise dangerous edges to be exposed will also cause the vehicle to fail. 4 Checks carried out on YOUR VEHICLE’S EXHAUST EMISSION SYSTEM Petrol models Wheels and tyres M Examine the sidewalls and tread area of each tyre in turn. Check for cuts, tears, lumps, bulges, separation of the tread, and exposure of the ply or cord due to wear or damage. Check that the tyre bead is correctly seated on the wheel rim, that the valve is sound and M Have the engine at normal operating temperature, and make sure that it is in good tune (ignition system in good order, air filter element clean, etc). M Before any measurements are carried out, raise the engine speed to around 2500 rpm, and hold it at this speed for 20 seconds. Allow the engine speed to return to idle, and watch for smoke emissions from the exhaust tailpipe. If the idle speed is obviously much too high, or if dense blue or clearly-visible black smoke comes from the tailpipe for more than 5 seconds, the vehicle will fail. As a rule of thumb, blue smoke signifies oil being burnt (engine wear) while black smoke signifies unburnt fuel (dirty air cleaner element, or other carburettor or fuel system fault). M An exhaust gas analyser capable of measuring carbon monoxide (CO) and hydrocarbons (HC) is now needed. If such an instrument cannot be hired or borrowed, a local garage may agree to perform the check for a small fee. CO emissions (mixture) M At the time of writing, the maximum CO level at idle is 3.5% for vehicles first used after August 1986 and 4.5% for older vehicles. From January 1996 a much tighter limit (around 0.5%) applies to catalyst-equipped vehicles first used from August 1992. If the CO level cannot be reduced far enough to pass the test (and the fuel and ignition systems are otherwise in good condition) then the carburettor is badly worn, or there is some problem in the fuel injection system or catalytic converter (as applicable). HC emissions M With the CO emissions within limits, HC emissions must be no more than 1200 ppm (parts per million). If the vehicle fails this test at idle, it can be re-tested at around 2000 rpm; if the HC level is then 1200 ppm or less, this counts as a pass. M Excessive HC emissions can be caused by oil being burnt, but they are more likely to be due to unburnt fuel. Diesel models M The only emission test applicable to Diesel engines is the measuring of exhaust smoke density. The test involves accelerating the engine several times to its maximum unloaded speed. Note: It is of the utmost importance that the engine timing belt is in good condition before the test is carried out. M Excessive smoke can be caused by a dirty air cleaner element. Otherwise, professional advice may be needed to find the cause. Tools and Working Facilities Introduction A selection of good tools is a fundamental requirement for anyone contemplating the maintenance and repair of a motor vehicle. For the owner who does not possess any, their purchase will prove a considerable expense, offsetting some of the savings made by doing-it-yourself. However, provided that the tools purchased meet the relevant national safety standards and are of good quality, they will last for many years and prove an extremely worthwhile investment. To help the average owner to decide which tools are needed to carry out the various tasks detailed in this manual, we have compiled three lists of tools under the following headings: Maintenance and minor repair, Repair and overhaul, and Special. Newcomers to practical mechanics should start off with the Maintenance and minor repair tool kit, and confine themselves to the simpler jobs around the vehicle. Then, as confidence and experience grow, more difficult tasks can be undertaken, with extra tools being purchased as, and when, they are needed. In this way, a Maintenance and minor repair tool kit can be built up into a Repair and overhaul tool kit over a considerable period of time, without any major cash outlays. The experienced do-ityourselfer will have a tool kit good enough for most repair and overhaul procedures, and will add tools from the Special category when it is felt that the expense is justified by the amount of use to which these tools will be put. Maintenance and minor repair tool kit The tools given in this list should be considered as a minimum requirement if routine maintenance, servicing and minor repair operations are to be undertaken. We recommend the purchase of combination spanners (ring one end, open-ended the other); although more expensive than openended ones, they do give the advantages of both types of spanner. M Combination spanners: 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 19, 21, 22, 24 & 26 mm M Adjustable spanner - 35 mm jaw (approx) M Set of feeler gauges M Spark plug spanner (with rubber insert) M Spark plug gap adjustment tool M Brake bleed nipple spanner M Screwdrivers: Flat blade and cross blade – approx 100 mm long x 6 mm dia M Combination pliers M Hacksaw (junior) M Tyre pump M Tyre pressure gauge M Oil can M Oil filter removal tool M Fine emery cloth M Wire brush (small) M Funnel (medium size) Repair and overhaul tool kit These tools are virtually essential for anyone undertaking any major repairs to a motor vehicle, and are additional to those given in the Maintenance and minor repair list. Included in this list is a comprehensive set of sockets. Although these are expensive, they will be found invaluable as they are so versatile - particularly if various drives are included in the set. We recommend the halfinch square-drive type, as this can be used with most proprietary torque wrenches. If you cannot afford a socket set, even bought piecemeal, then inexpensive tubular box spanners are a useful alternative. The tools in this list will occasionally need to be supplemented by tools from the Special list: M Sockets (or box spanners) to cover range in previous list M Reversible ratchet drive (for use with sockets) (see illustration) M Extension piece, 250 mm (for use with sockets) M Universal joint (for use with sockets) M Torque wrench (for use with sockets) M Self-locking grips M Ball pein hammer M Soft-faced mallet (plastic/aluminium or rubber) M Screwdrivers: Flat blade - long & sturdy, short (chubby), and narrow (electrician’s) types Cross blade - Long & sturdy, and short (chubby) types M Pliers: Long-nosed Side cutters (electrician’s) Circlip (internal and external) M Cold chisel - 25 mm M Scriber M Scraper M M M M M M M M M M M M M REF•5 Centre-punch Pin punch Hacksaw Brake hose clamp Brake bleeding kit Selection of twist drills Steel rule/straight-edge Allen keys Selection of files Wire brush Axle stands Jack (strong trolley or hydraulic type) Light with extension lead Special tools The tools in this list are those which are not used regularly, are expensive to buy, or which need to be used in accordance with their manufacturers’ instructions. Unless relatively difficult mechanical jobs are undertaken frequently, it will not be economic to buy many of these tools. Where this is the case, you could consider clubbing together with friends (or joining a motorists’ club) to make a joint purchase, or borrowing the tools against a deposit from a local garage or tool hire specialist. It is worth noting that many of the larger DIY superstores now carry a large range of special tools for hire at modest rates. The following list contains only those tools and instruments freely available to the public, and not those special tools produced by the vehicle manufacturer specifically for its dealer network. You will find occasional references to these manufacturers’ special tools in the text of this manual. Generally, an alternative method of doing the job without the vehicle manufacturers’ special tool is given. However, sometimes there is no alternative to using them. Where this is the case and the relevant tool cannot be bought or borrowed, you will have to entrust the work to a franchised garage. M Valve spring compressor (see illustration) M Valve grinding tool M Piston ring compressor (see illustration) M Piston ring removal/installation tool (see illustration) M Cylinder bore hone (see illustration) M Balljoint separator M Coil spring compressors (where applicable) M Two/three-legged hub and bearing puller (see illustration) REF REF•6 Tools and Working Facilities Sockets and reversible ratchet drive Valve spring compressor Piston ring compressor Piston ring removal/installation tool Cylinder bore hone Three-legged hub and bearing puller Micrometer set Vernier calipers Dial test indicator and magnetic stand Compression testing gauge Clutch plate alignment set Brake shoe steady spring cup removal tool Tools and Working Facilities M Impact screwdriver M Micrometer and/or vernier calipers (see illustrations) M Dial gauge (see illustration) M Universal electrical multi-meter M Cylinder compression gauge (see illustration) M Clutch plate alignment set (see illustration) M Brake shoe steady spring cup removal tool (see illustration) M Bush and bearing removal/installation set (see illustration) M Stud extractors (see illustration) M Tap and die set (see illustration) M Lifting tackle M Trolley jack Buying tools For practically all tools, a tool factor is the best source, since he will have a very comprehensive range compared with the average garage or accessory shop. Having said that, accessory shops often offer excellent quality tools at discount prices, so it pays to shop around. Remember, you don’t have to buy the most expensive items on the shelf, but it is always advisable to steer clear of the very cheap tools. There are plenty of good tools around at Bush and bearing removal/installation set reasonable prices, but always aim to purchase items which meet the relevant national safety standards. If in doubt, ask the proprietor or manager of the shop for advice before making a purchase. Care and maintenance of tools Having purchased a reasonable tool kit, it is necessary to keep the tools in a clean and serviceable condition. After use, always wipe off any dirt, grease and metal particles using a clean, dry cloth, before putting the tools away. Never leave them lying around after they have been used. A simple tool rack on the garage or workshop wall for items such as screwdrivers and pliers is a good idea. Store all normal spanners and sockets in a metal box. Any measuring instruments, gauges, meters, etc, must be carefully stored where they cannot be damaged or become rusty. Take a little care when tools are used. Hammer heads inevitably become marked, and screwdrivers lose the keen edge on their blades from time to time. A little timely attention with emery cloth or a file will soon restore items like this to a good serviceable finish. Working facilities Not to be forgotten when discussing tools Stud extractor set REF•7 is the workshop itself. If anything more than routine maintenance is to be carried out, some form of suitable working area becomes essential. It is appreciated that many an ownermechanic is forced by circumstances to remove an engine or similar item without the benefit of a garage or workshop. Having done this, any repairs should always be done under the cover of a roof. Wherever possible, any dismantling should be done on a clean, flat workbench or table at a suitable working height. Any workbench needs a vice; one with a jaw opening of 100 mm is suitable for most jobs. As mentioned previously, some clean dry storage space is also required for tools, as well as for any lubricants, cleaning fluids, touch-up paints and so on, which become necessary. Another item which may be required, and which has a much more general usage, is an electric drill with a chuck capacity of at least 8 mm. This, together with a good range of twist drills, is virtually essential for fitting accessories. Last, but not least, always keep a supply of old newspapers and clean, lint-free rags available, and try to keep any working area as clean as possible. Tap and die set REF REF•8 General Repair Procedures Whenever servicing, repair or overhaul work is carried out on the car or its components, observe the following procedures and instructions. This will assist in carrying out the operation efficiently and to a professional standard of workmanship. Joint mating faces and gaskets When separating components at their mating faces, never insert screwdrivers or similar implements into the joint between the faces in order to prise them apart. This can cause severe damage which results in oil leaks, coolant leaks, etc upon reassembly. Separation is usually achieved by tapping along the joint with a soft-faced hammer in order to break the seal. However, note that this method may not be suitable where dowels are used for component location. Where a gasket is used between the mating faces of two components, a new one must be fitted on reassembly; fit it dry unless otherwise stated in the repair procedure. Make sure that the mating faces are clean and dry, with all traces of old gasket removed. When cleaning a joint face, use a tool which is unlikely to score or damage the face, and remove any burrs or nicks with an oilstone or fine file. Make sure that tapped holes are cleaned with a pipe cleaner, and keep them free of jointing compound, if this is being used, unless specifically instructed otherwise. Ensure that all orifices, channels or pipes are clear, and blow through them, preferably using compressed air. Oil seals Oil seals can be removed by levering them out with a wide flat-bladed screwdriver or similar implement. Alternatively, a number of self-tapping screws may be screwed into the seal, and these used as a purchase for pliers or some similar device in order to pull the seal free. Whenever an oil seal is removed from its working location, either individually or as part of an assembly, it should be renewed. The very fine sealing lip of the seal is easily damaged, and will not seal if the surface it contacts is not completely clean and free from scratches, nicks or grooves. If the original sealing surface of the component cannot be restored, and the manufacturer has not made provision for slight relocation of the seal relative to the sealing surface, the component should be renewed. Protect the lips of the seal from any surface which may damage them in the course of fitting. Use tape or a conical sleeve where possible. Lubricate the seal lips with oil before fitting and, on dual-lipped seals, fill the space between the lips with grease. Unless otherwise stated, oil seals must be fitted with their sealing lips toward the lubricant to be sealed. Use a tubular drift or block of wood of the appropriate size to install the seal and, if the seal housing is shouldered, drive the seal down to the shoulder. If the seal housing is unshouldered, the seal should be fitted with its face flush with the housing top face (unless otherwise instructed). Screw threads and fastenings Seized nuts, bolts and screws are quite a common occurrence where corrosion has set in, and the use of penetrating oil or releasing fluid will often overcome this problem if the offending item is soaked for a while before attempting to release it. The use of an impact driver may also provide a means of releasing such stubborn fastening devices, when used in conjunction with the appropriate screwdriver bit or socket. If none of these methods works, it may be necessary to resort to the careful application of heat, or the use of a hacksaw or nut splitter device. Studs are usually removed by locking two nuts together on the threaded part, and then using a spanner on the lower nut to unscrew the stud. Studs or bolts which have broken off below the surface of the component in which they are mounted can sometimes be removed using a stud extractor. Always ensure that a blind tapped hole is completely free from oil, grease, water or other fluid before installing the bolt or stud. Failure to do this could cause the housing to crack due to the hydraulic action of the bolt or stud as it is screwed in. When tightening a castellated nut to accept a split pin, tighten the nut to the specified torque, where applicable, and then tighten further to the next split pin hole. Never slacken the nut to align the split pin hole, unless stated in the repair procedure. When checking or retightening a nut or bolt to a specified torque setting, slacken the nut or bolt by a quarter of a turn, and then retighten to the specified setting. However, this should not be attempted where angular tightening has been used. For some screw fastenings, notably cylinder head bolts or nuts, torque wrench settings are no longer specified for the latter stages of tightening, “angle-tightening” being called up instead. Typically, a fairly low torque wrench setting will be applied to the bolts/nuts in the correct sequence, followed by one or more stages of tightening through specified angles. Locknuts, locktabs and washers Any fastening which will rotate against a component or housing during tightening should always have a washer between it and the relevant component or housing. Spring or split washers should always be renewed when they are used to lock a critical component such as a big-end bearing retaining bolt or nut. Locktabs which are folded over to retain a nut or bolt should always be renewed. Self-locking nuts can be re-used in noncritical areas, providing resistance can be felt when the locking portion passes over the bolt or stud thread. However, it should be noted that self-locking stiffnuts tend to lose their effectiveness after long periods of use, and should then be renewed as a matter of course. Split pins must always be replaced with new ones of the correct size for the hole. When thread-locking compound is found on the threads of a fastener which is to be reused, it should be cleaned off with a wire brush and solvent, and fresh compound applied on reassembly. Special tools Some repair procedures in this manual entail the use of special tools such as a press, two or three-legged pullers, spring compressors, etc. Wherever possible, suitable readily-available alternatives to the manufacturer’s special tools are described, and are shown in use. In some instances, where no alternative is possible, it has been necessary to resort to the use of a manufacturer’s tool, and this has been done for reasons of safety as well as the efficient completion of the repair operation. Unless you are highly-skilled and have a thorough understanding of the procedures described, never attempt to bypass the use of any special tool when the procedure described specifies its use. Not only is there a very great risk of personal injury, but expensive damage could be caused to the components involved. Environmental considerations When disposing of used engine oil, brake fluid, antifreeze, etc, give due consideration to any detrimental environmental effects. Do not, for instance, pour any of the above liquids down drains into the general sewage system, or onto the ground to soak away. Many local council refuse tips provide a facility for waste oil disposal, as do some garages. If none of these facilities are available, consult your local Environmental Health Department, or the National Rivers Authority, for further advice. With the universal tightening-up of legislation regarding the emission of environmentally-harmful substances from motor vehicles, most vehicles have tamperproof devices fitted to the main adjustment points of the fuel system. These devices are primarily designed to prevent unqualified persons from adjusting the fuel/air mixture, with the chance of a consequent increase in toxic emissions. If such devices are found during servicing or overhaul, they should, wherever possible, be renewed or refitted in accordance with the manufacturer’s requirements or current legislation. Note: It is antisocial and illegal to dump oil down the drain. To find the location of your local oil recycling bank, call this number free. Fault Finding Introduction The vehicle owner who does his or her own maintenance according to the recommended schedules should not have to use this section of the manual very often. Modern component reliability is such that, provided those items subject to wear or deterioration are inspected or renewed at the specified intervals, sudden failure is comparatively rare. Faults do not usually just happen as a result of sudden failure, but develop over a period of time. Major mechanical failures in particular are usually preceded by characteristic symptoms over hundreds or even thousands of miles. Those components which do occasionally fail without warning are often small and easily carried in the vehicle. With any fault finding, the first step is to decide where to begin investigations. Sometimes this is obvious, but on other occasions a little detective work will be necessary. The owner who makes half a dozen haphazard adjustments or replacements may be successful in curing a fault (or its symptoms), but he will be none the wiser if the fault recurs and he may well have spent more time and money than was necessary. A calm and logical approach will be found to be more satisfactory in the long run. Always take into account any warning signs or abnormalities that may have been noticed in the period preceding the fault – power loss, high or low gauge readings, unusual noises or smells, etc – and remember that failure of components such as fuses or spark plugs may only be pointers to some underlying fault. The pages which follow here are intended to help in cases of failure to start or breakdown on the road. There is also a Fault Diagnosis Section at the end of each Chapter which should be consulted if the preliminary checks prove unfruitful. Whatever the fault, certain basic principles apply. These are as follows: Verify the fault. This is simply a matter of being sure that you know what the symptoms are before starting work. This is particularly important if you are investigating a fault for someone else who may not have described it very accurately. Don’t overlook the obvious. For example, if the vehicle won’t start, is there petrol in the tank? (Don’t take anyone else’s word on this particular point, and don’t trust the fuel gauge either!) If an electrical fault is indicated, look for loose or broken wires before digging out the test gear. Cure the disease, not the symptom. Substituting a flat battery with a fully charged one will get you off the hard shoulder, but if the underlying cause is not attended to,the new battery will go the same way. Similarly, changing oil-fouled spark plugs for a new set will get you moving again, but remember that the reason for the fouling (if it wasn’t simply an incorrect grade of plug) will have to be established and corrected. Don’t take anything for granted. Particularly, don’t forget that a ‘new’ component may itself be defective (especially if it’s been rattling round in the boot for months), and don’t leave components out of a fault diagnosis sequence just because they are new or recently fitted. When you do finally diagnose a difficult fault, you’ll probably realise that all the evidence was there from the start. Electrical faults Electrical faults can be more puzzling than straightforward mechanical failures, but they are no less susceptible to logical analysis if the basic principles of operation are understood. Vehicle electrical wiring exists in extremely unfavourable conditions – heat, vibration and chemical attack and the first things to look for are loose or corroded connections and broken or chafed wires, REF•9 especially where the wires pass through holes in the bodywork or are subject to vibration. All metal-bodied vehicles in current production have one pole of the battery ‘earthed’, ie connected to the vehicle bodywork, and in nearly all modern vehicles it is the negative (–) terminal. The various electrical components – motors, bulb holders, etc – are also connected to earth, either by means of a lead or directly by their mountings. Electric current flows through the component and then back to the battery via the bodywork. If the component mounting is loose or corroded, or if a good path back to the battery is not available, the circuit will be incomplete and malfunction will result. The engine and/or gearbox are also earthed by means of flexible metal straps to the body or subframe; if these straps are loose or missing, starter motor, generator and ignition trouble may result. Assuming the earth return to be satisfactory, electrical faults will be due either to component malfunction or to defects in the current supply. Individual components are dealt with in Chapter 9. If supply wires are broken or cracked internally this results in an open-circuit, and the easiest way to check for this is to bypass the suspect wire temporarily with a length of wire having a crocodile clip or suitable connector at each end. Alternatively, a 12V test lamp can be used to verify the presence of supply voltage at various points along the wire and the break can be thus isolated. If a bare portion of a live wire touches the bodywork or other earthed metal part, the electricity will take the low-resistance path thus formed back to the battery: this is known as a short-circuit. Hopefully a short-circuit will blow a fuse, but otherwise it may cause burning of the insulation (and possibly further short-circuits) or even a fire. This is why it is inadvisable to bypass persistently blowing fuses with silver foil or wire. REF REF•10 Fault Finding Spares and tool kit Most vehicles are supplied only with sufficient tools for wheel changing; the Maintenance and minor repair tool kit detailed in Tools and working facilities, with the addition of a hammer, is probably sufficient for those repairs that most motorists would consider attempting at the roadside. In addition a few items which can be fitted without too much trouble in the event of a breakdown should be carried. Experience and available space will modify the list below, but the following may save having to call on professional assistance: m Spark plugs, clean and correctly gapped m HT lead and plug cap – long enough to reach the plug furthest from the distributor m Distributor rotor, condenser and contact breaker points (where applicable) Engine will not start Engine fails to turn when starter operated m Flat battery (recharge use jump leads or push start) m Battery terminals loose or corroded m Battery earth to body defective m Engine earth strap loose or broken m Starter motor (or solenoid) wiring loose or broken m Ignition/starter switch faulty m Major mechanical failure (seizure) m Starter or solenoid internal fault (see Chapter 12) m Drivebelt(s) — emergency type may suffice m Spare fuses m Set of principal light bulbs m Tin of radiator sealer and hose bandage m Exhaust bandage m Roll of insulating tape m Length of soft iron wire m Length of electrical flex m Torch or inspection lamp (can double as test lamp) m Battery jump leads m Tow-rope m Ignition waterproofing aerosol m Litre of engine oil m Sealed can of hydraulic fluid m Emergency windscreen m Wormdrive clips m Tube of filler paste If spare fuel is carried, a can designed for the purpose should be used to minimise risks of leakage and collision damage. A first aid kit and a warning triangle, whilst not at present compulsory in the UK, are obviously sensible items to carry in addition to the above. When touring abroad it may be advisable to carry additional spares which, even if you cannot fit them yourself, could save having to wait while parts are obtained. The items below may be worth considering: m Starter motor (or solenoid) wiring loose m Starter motor internal fault (see Chapter 9) m Excessive choke (hot engine) or insufficient choke (cold engine) m Fouled or incorrectly gapped spark plugs (remove, clean and regap) m Other ignition system fault (see Chapter 4) m Other fuel system fault (see Chapter 3) m Poor compression (see Chapter 1) m Major mechanical failure (eg camshaft drive) Starter motor spins without turning engine m Flywheel gear teeth damaged or worn m Starter motor mounting bolts loose m m m m Clutch and throttle cables Cylinder head gasket Alternator brushes Tyre valve core One of the motoring organisations will be able to advise on availability of fuel, etc, in foreign countries. Engine turns normally but fails to start Engine fires but will not run m Damp or dirty HT leads and distributor cap (crank engine and check for spark) m No fuel in tank (check for delivery at carburettor) m m m m Insufficient choke (cold engine) Air leaks at carburettor or inlet manifold Fuel starvation (see Chapter 3) Ignition fault (see Chapter 4) Starter motor turns engine slowly m Partially discharged battery (recharge, use jump leads, or push start) m Battery terminals loose or corroded m Battery earth to body defective m Engine earth strap loose A simple test lamp is useful for checking electrical faults Carrying a few spares may save you a long walk! Fault Finding Engine cuts out and will not restart Engine cuts out suddenly – ignition fault m Loose or disconnected LT wires m Wet HT leads or distributor cap (after traversing water splash) m Coil failure (check for spark) m Other ignition fault (see Chapter 4) Engine misfires before cutting out – fuel fault m Fuel tank empty m Fuel pump defective or filter blocked (check for delivery) m Fuel tank filler vent blocked (suction will be evident on releasing cap) m Carburettor needle valve sticking m Carburettor jets blocked (fuel contaminated) m Other fuel system fault (see Chapter 3) Engine cuts out – other causes m Serious overheating m Major mechanical failure (eg camshaft drive) Engine overheats Ignition (no-charge) warning light illuminated Wire to sender unit earthed Engine overheating Oil filter clogged or bypass valve defective Oil pressure relief valve defective Oil pick-up strainer clogged Oil pump worn or mountings loose Worn main or big-end bearings m Slack or broken drivebelt — retension or renew (Chapter 9) Ignition warning light not illuminated m Coolant loss due to internal or external leakage (see Chapter 2) m Thermostat defective m Low oil level m Brakes binding m Radiator clogged externally or internally m Electric cooling fan not operating correctly m Engine waterways clogged m Ignition timing incorrect or automatic advance malfunctioning m Mixture too weak Note: Do not add cold water to an overheated engine or damage may result Engine noises Pre-ignition (pinking) on acceleration m m m m m Incorrect grade of fuel Ignition timing incorrect Distributor faulty or worn Worn or maladjusted carburettor Excessive carbon build-up in engine Whistling or wheezing noises m Leaking vacuum hose m Leaking carburettor or manifold gasket m Blowing head gasket Tapping or rattling Low engine oil pressure Note: Low oil pressure in a high-mileage engine at tickover is not necessarily a cause for concern. Sudden pressure loss at speed is far more significant. In any event check the gauge or warning light sender before condemning the engine. Gauge reads low or warning light illuminated with engine running Crank engine and check for spark. Note use of insulated tool m m m m m m m REF•11 m Oil level low or incorrect grade m Defective gauge or sender unit m Incorrect valve clearances (where applicable) m Worn valve gear m Worn timing chain or belt m Broken piston ring (ticking noise) Knocking or thumping m Unintentional mechanical contact (eg fan blades) m Worn drivebelt m Peripheral component fault (generator, water pump, etc) m Worn big-end bearings (regular heavy knocking, perhaps less under load) m Worn main bearings (rumbling and knocking, perhaps worsening under load) m Piston slap (most noticeable when cold) REF REF•12 Buying spare parts & Vehicle identification numbers Buying spare parts Spare parts are available from many sources, for example, FIAT garages, other garages and accessory shops, and motor factors. Our advice regarding spare parts is as follows: Officially appointed FIAT garages - This is the best source of parts which are peculiar to your car and otherwise not generally available (eg complete cylinder heads, internal gearbox components, badges, interior trim etc). It is also the only place at which you should buy parts if your vehicle is still under warranty; non-FlAT components may invalidate the warranty. To be sure of obtaining the correct parts it will always be necessary to give the partsman your car’s engine number, chassis number and number for spares, and if possible, to take the old part along for positive identification. Many parts are available under a factory exchange scheme - any parts returned should always be clean. It obviously makes good sense to go straight to the specialists on your car for this type of part for they are best equipped to supply you. They will also be able to provide their own FIAT service manual for your car should you require one. Other garages and accessory shops - These are often very good places to buy material and components needed for the maintenance of your car (eg oil filters, spark plugs, bulbs, drivebelts, oils and grease, touch-up paint, filler paste etc). They also sell accessories, usually have convenient opening hours, charge lower prices and can often be found not far from home. Motor factors - Good factors stock all of the more important components which wear out relatively quickly (eg clutch components, pistons, valves, exhaust systems, brake pipes/seals/shoes and pads etc). Motor factors will often provide new or reconditioned components on a part exchange basis - this can save a considerable amount of money. parts manuals and lists are compiled upon a numerical basis, the individual vehicle numbers being essential to correct identification of the component required. The chassis type and number plate is located on the wing valance under the bonnet. The identification data plate is located on the radiator top rail. The engine type and number is stamped on the cylinder block. The paintwork colour code is given on a label stuck to the inner surface of the tailgate. Vehicle identification numbers Modifications are a continuing and unpublicised process in vehicle manufacture quite apart from major model changes. Spare Engine number on 1116 cc engine Manufacturer’s plate legend Location of under-bonnet identification numbers and plates A B C D Chassis type and number Manufacturer’s plate Engine number (903 cc) Engine number (1116 cc and 1301 cc) A B C D E F Name of manufacturer Approval number Vehicle identification number Chassis serial number Maximum laden weight Maximum laden weight (vehicle plus trailer) G H I L M N Maximum front axle weight Maximum rear axle weight Engine type Body type Spares reference Diesel models only (smoke coefficient) Glossary of Technical Terms A ABS (Anti-lock brake system) A system, usually electronically controlled, that senses incipient wheel lockup during braking and relieves hydraulic pressure at wheels that are about to skid. Air bag An inflatable bag hidden in the steering wheel (driver’s side) or the dash or glovebox (passenger side). In a head-on collision, the bags inflate, preventing the driver and front passenger from being thrown forward into the steering wheel or windscreen. Air cleaner A metal or plastic housing, containing a filter element, which removes dust and dirt from the air being drawn into the engine. Air filter element The actual filter in an air cleaner system, usually manufactured from pleated paper and requiring renewal at regular intervals. Asbestos is a health hazard and the dust created by brake systems should never be inhaled or ingested. Axle A shaft on which a wheel revolves, or which revolves with a wheel. Also, a solid beam that connects the two wheels at one end of the vehicle. An axle which also transmits power to the wheels is known as a live axle. Axleshaft A single rotating shaft, on either side of the differential, which delivers power from the final drive assembly to the drive wheels. Also called a driveshaft or a halfshaft. B Ball bearing An anti-friction bearing consisting of a hardened inner and outer race with hardened steel balls between two races. Bearing The curved surface on a shaft or in a bore, or the part assembled into either, that permits relative motion between them with minimum wear and friction. Air filter Allen key A hexagonal wrench which fits into a recessed hexagonal hole. Alligator clip A long-nosed spring-loaded metal clip with meshing teeth. Used to make temporary electrical connections. Alternator A component in the electrical system which converts mechanical energy from a drivebelt into electrical energy to charge the battery and to operate the starting system, ignition system and electrical accessories. Ampere (amp) A unit of measurement for the flow of electric current. One amp is the amount of current produced by one volt acting through a resistance of one ohm. Anaerobic sealer A substance used to prevent bolts and screws from loosening. Anaerobic means that it does not require oxygen for activation. The Loctite brand is widely used. Antifreeze A substance (usually ethylene glycol) mixed with water, and added to a vehicle’s cooling system, to prevent freezing of the coolant in winter. Antifreeze also contains chemicals to inhibit corrosion and the formation of rust and other deposits that would tend to clog the radiator and coolant passages and reduce cooling efficiency. Anti-seize compound A coating that reduces the risk of seizing on fasteners that are subjected to high temperatures, such as exhaust manifold bolts and nuts. Asbestos A natural fibrous mineral with great heat resistance, commonly used in the composition of brake friction materials. Bearing Big-end bearing The bearing in the end of the connecting rod that’s attached to the crankshaft. Bleed nipple A valve on a brake wheel cylinder, caliper or other hydraulic component that is opened to purge the hydraulic system of air. Also called a bleed screw. Brake bleeding Procedure for removing air from lines of a hydraulic brake system. REF•13 Brake drum The component of a drum brake that rotates with the wheels. Brake linings The friction material which contacts the brake disc or drum to retard the vehicle’s speed. The linings are bonded or riveted to the brake pads or shoes. Brake pads The replaceable friction pads that pinch the brake disc when the brakes are applied. Brake pads consist of a friction material bonded or riveted to a rigid backing plate. Brake shoe The crescent-shaped carrier to which the brake linings are mounted and which forces the lining against the rotating drum during braking. Braking systems For more information on braking systems, consult the Haynes Automotive Brake Manual. Breaker bar A long socket wrench handle providing greater leverage. Bulkhead The insulated partition between the engine and the passenger compartment. C Caliper The non-rotating part of a disc-brake assembly that straddles the disc and carries the brake pads. The caliper also contains the hydraulic components that cause the pads to pinch the disc when the brakes are applied. A caliper is also a measuring tool that can be set to measure inside or outside dimensions of an object. Camshaft A rotating shaft on which a series of cam lobes operate the valve mechanisms. The camshaft may be driven by gears, by sprockets and chain or by sprockets and a belt. Canister A container in an evaporative emission control system; contains activated charcoal granules to trap vapours from the fuel system. Canister Brake bleeding Brake disc The component of a disc brake that rotates with the wheels. Carburettor A device which mixes fuel with air in the proper proportions to provide a desired power output from a spark ignition internal combustion engine. Castellated Resembling the parapets along the top of a castle wall. For example, a castellated balljoint stud nut. Castor In wheel alignment, the backward or forward tilt of the steering axis. Castor is positive when the steering axis is inclined rearward at the top. REF REF•14 Glossary of Technical Terms Catalytic converter A silencer-like device in the exhaust system which converts certain pollutants in the exhaust gases into less harmful substances. Catalytic converter Circlip A ring-shaped clip used to prevent endwise movement of cylindrical parts and shafts. An internal circlip is installed in a groove in a housing; an external circlip fits into a groove on the outside of a cylindrical piece such as a shaft. Clearance The amount of space between two parts. For example, between a piston and a cylinder, between a bearing and a journal, etc. Coil spring A spiral of elastic steel found in various sizes throughout a vehicle, for example as a springing medium in the suspension and in the valve train. Compression Reduction in volume, and increase in pressure and temperature, of a gas, caused by squeezing it into a smaller space. Compression ratio The relationship between cylinder volume when the piston is at top dead centre and cylinder volume when the piston is at bottom dead centre. Constant velocity (CV) joint A type of universal joint that cancels out vibrations caused by driving power being transmitted through an angle. Core plug A disc or cup-shaped metal device inserted in a hole in a casting through which core was removed when the casting was formed. Also known as a freeze plug or expansion plug. Crankcase The lower part of the engine block in which the crankshaft rotates. Crankshaft The main rotating member, or shaft, running the length of the crankcase, with offset “throws” to which the connecting rods are attached. Crankshaft assembly Crocodile clip See Alligator clip D Diagnostic code Code numbers obtained by accessing the diagnostic mode of an engine management computer. This code can be used to determine the area in the system where a malfunction may be located. Disc brake A brake design incorporating a rotating disc onto which brake pads are squeezed. The resulting friction converts the energy of a moving vehicle into heat. Double-overhead cam (DOHC) An engine that uses two overhead camshafts, usually one for the intake valves and one for the exhaust valves. Drivebelt(s) The belt(s) used to drive accessories such as the alternator, water pump, power steering pump, air conditioning compressor, etc. off the crankshaft pulley. Endfloat The amount of lengthwise movement between two parts. As applied to a crankshaft, the distance that the crankshaft can move forward and back in the cylinder block. Engine management system (EMS) A computer controlled system which manages the fuel injection and the ignition systems in an integrated fashion. Exhaust manifold A part with several passages through which exhaust gases leave the engine combustion chambers and enter the exhaust pipe. F Fan clutch A viscous (fluid) drive coupling device which permits variable engine fan speeds in relation to engine speeds. Feeler blade A thin strip or blade of hardened steel, ground to an exact thickness, used to check or measure clearances between parts. Accessory drivebelts Driveshaft Any shaft used to transmit motion. Commonly used when referring to the axleshafts on a front wheel drive vehicle. Drum brake A type of brake using a drumshaped metal cylinder attached to the inner surface of the wheel. When the brake pedal is pressed, curved brake shoes with friction linings press against the inside of the drum to slow or stop the vehicle. E EGR valve A valve used to introduce exhaust gases into the intake air stream. Electronic control unit (ECU) A computer which controls (for instance) ignition and fuel injection systems, or an anti-lock braking system. For more information refer to the Haynes Automotive Electrical and Electronic Systems Manual. Electronic Fuel Injection (EFI) A computer controlled fuel system that distributes fuel through an injector located in each intake port of the engine. Emergency brake A braking system, independent of the main hydraulic system, that can be used to slow or stop the vehicle if the primary brakes fail, or to hold the vehicle stationary even though the brake pedal isn’t depressed. It usually consists of a hand lever that actuates either front or rear brakes mechanically through a series of cables and linkages. Also known as a handbrake or parking brake. Feeler blade Firing order The order in which the engine cylinders fire, or deliver their power strokes, beginning with the number one cylinder. Flywheel A heavy spinning wheel in which energy is absorbed and stored by means of momentum. On cars, the flywheel is attached to the crankshaft to smooth out firing impulses. Free play The amount of travel before any action takes place. The “looseness” in a linkage, or an assembly of parts, between the initial application of force and actual movement. For example, the distance the brake pedal moves before the pistons in the master cylinder are actuated. Fuse An electrical device which protects a circuit against accidental overload. The typical fuse contains a soft piece of metal which is calibrated to melt at a predetermined current flow (expressed as amps) and break the circuit. Fusible link A circuit protection device consisting of a conductor surrounded by heat-resistant insulation. The conductor is smaller than the wire it protects, so it acts as the weakest link in the circuit. Unlike a blown fuse, a failed fusible link must frequently be cut from the wire for replacement. Glossary of Technical Terms G I Gap The distance the spark must travel in jumping from the centre electrode to the side electrode in a spark plug. Also refers to the spacing between the points in a contact breaker assembly in a conventional pointstype ignition, or to the distance between the reluctor or rotor and the pickup coil in an electronic ignition. Ignition timing The moment at which the spark plug fires, usually expressed in the number of crankshaft degrees before the piston reaches the top of its stroke. Inlet manifold A tube or housing with passages through which flows the air-fuel mixture (carburettor vehicles and vehicles with throttle body injection) or air only (port fuelinjected vehicles) to the port openings in the cylinder head. J Jump start Starting the engine of a vehicle with a discharged or weak battery by attaching jump leads from the weak battery to a charged or helper battery. L Adjusting spark plug gap Gasket Any thin, soft material - usually cork, cardboard, asbestos or soft metal - installed between two metal surfaces to ensure a good seal. For instance, the cylinder head gasket seals the joint between the block and the cylinder head. Load Sensing Proportioning Valve (LSPV) A brake hydraulic system control valve that works like a proportioning valve, but also takes into consideration the amount of weight carried by the rear axle. Locknut A nut used to lock an adjustment nut, or other threaded component, in place. For example, a locknut is employed to keep the adjusting nut on the rocker arm in position. Lockwasher A form of washer designed to prevent an attaching nut from working loose. M Gasket Gauge An instrument panel display used to monitor engine conditions. A gauge with a movable pointer on a dial or a fixed scale is an analogue gauge. A gauge with a numerical readout is called a digital gauge. H Halfshaft A rotating shaft that transmits power from the final drive unit to a drive wheel, usually when referring to a live rear axle. Harmonic balancer A device designed to reduce torsion or twisting vibration in the crankshaft. May be incorporated in the crankshaft pulley. Also known as a vibration damper. Hone An abrasive tool for correcting small irregularities or differences in diameter in an engine cylinder, brake cylinder, etc. Hydraulic tappet A tappet that utilises hydraulic pressure from the engine’s lubrication system to maintain zero clearance (constant contact with both camshaft and valve stem). Automatically adjusts to variation in valve stem length. Hydraulic tappets also reduce valve noise. MacPherson strut A type of front suspension system devised by Earle MacPherson at Ford of England. In its original form, a simple lateral link with the anti-roll bar creates the lower control arm. A long strut - an integral coil spring and shock absorber - is mounted between the body and the steering knuckle. Many modern so-called MacPherson strut systems use a conventional lower A-arm and don’t rely on the anti-roll bar for location. Multimeter An electrical test instrument with the capability to measure voltage, current and resistance. N NOx Oxides of Nitrogen. A common toxic pollutant emitted by petrol and diesel engines at higher temperatures. O Ohm The unit of electrical resistance. One volt applied to a resistance of one ohm will produce a current of one amp. Ohmmeter An instrument for measuring electrical resistance. O-ring A type of sealing ring made of a special rubber-like material; in use, the O-ring is compressed into a groove to provide the sealing action. Overhead cam (ohc) engine An engine with the camshaft(s) located on top of the cylinder head(s). REF•15 Overhead valve (ohv) engine An engine with the valves located in the cylinder head, but with the camshaft located in the engine block. Oxygen sensor A device installed in the engine exhaust manifold, which senses the oxygen content in the exhaust and converts this information into an electric current. Also called a Lambda sensor. P Phillips screw A type of screw head having a cross instead of a slot for a corresponding type of screwdriver. Plastigage A thin strip of plastic thread, available in different sizes, used for measuring clearances. For example, a strip of Plastigage is laid across a bearing journal. The parts are assembled and dismantled; the width of the crushed strip indicates the clearance between journal and bearing. Plastigage Propeller shaft The long hollow tube with universal joints at both ends that carries power from the transmission to the differential on front-engined rear wheel drive vehicles. Proportioning valve A hydraulic control valve which limits the amount of pressure to the rear brakes during panic stops to prevent wheel lock-up. R Rack-and-pinion steering A steering system with a pinion gear on the end of the steering shaft that mates with a rack (think of a geared wheel opened up and laid flat). When the steering wheel is turned, the pinion turns, moving the rack to the left or right. This movement is transmitted through the track rods to the steering arms at the wheels. Radiator A liquid-to-air heat transfer device designed to reduce the temperature of the coolant in an internal combustion engine cooling system. Refrigerant Any substance used as a heat transfer agent in an air-conditioning system. R-12 has been the principle refrigerant for many years; recently, however, manufacturers have begun using R-134a, a non-CFC substance that is considered less harmful to the ozone in the upper atmosphere. Rocker arm A lever arm that rocks on a shaft or pivots on a stud. In an overhead valve engine, the rocker arm converts the upward movement of the pushrod into a downward movement to open a valve. REF REF•16 Glossary of Technical Terms Rotor In a distributor, the rotating device inside the cap that connects the centre electrode and the outer terminals as it turns, distributing the high voltage from the coil secondary winding to the proper spark plug. Also, that part of an alternator which rotates inside the stator. Also, the rotating assembly of a turbocharger, including the compressor wheel, shaft and turbine wheel. Runout The amount of wobble (in-and-out movement) of a gear or wheel as it’s rotated. The amount a shaft rotates “out-of-true.” The out-of-round condition of a rotating part. Sprocket A tooth or projection on the periphery of a wheel, shaped to engage with a chain or drivebelt. Commonly used to refer to the sprocket wheel itself. Starter inhibitor switch On vehicles with an automatic transmission, a switch that prevents starting if the vehicle is not in Neutral or Park. Strut See MacPherson strut. S T Sealant A liquid or paste used to prevent leakage at a joint. Sometimes used in conjunction with a gasket. Sealed beam lamp An older headlight design which integrates the reflector, lens and filaments into a hermetically-sealed one-piece unit. When a filament burns out or the lens cracks, the entire unit is simply replaced. Serpentine drivebelt A single, long, wide accessory drivebelt that’s used on some newer vehicles to drive all the accessories, instead of a series of smaller, shorter belts. Serpentine drivebelts are usually tensioned by an automatic tensioner. Serpentine drivebelt Shim Thin spacer, commonly used to adjust the clearance or relative positions between two parts. For example, shims inserted into or under bucket tappets control valve clearances. Clearance is adjusted by changing the thickness of the shim. Slide hammer A special puller that screws into or hooks onto a component such as a shaft or bearing; a heavy sliding handle on the shaft bottoms against the end of the shaft to knock the component free. Tappet A cylindrical component which transmits motion from the cam to the valve stem, either directly or via a pushrod and rocker arm. Also called a cam follower. Thermostat A heat-controlled valve that regulates the flow of coolant between the cylinder block and the radiator, so maintaining optimum engine operating temperature. A thermostat is also used in some air cleaners in which the temperature is regulated. Thrust bearing The bearing in the clutch assembly that is moved in to the release levers by clutch pedal action to disengage the clutch. Also referred to as a release bearing. Timing belt A toothed belt which drives the camshaft. Serious engine damage may result if it breaks in service. Timing chain A chain which drives the camshaft. Toe-in The amount the front wheels are closer together at the front than at the rear. On rear wheel drive vehicles, a slight amount of toe-in is usually specified to keep the front wheels running parallel on the road by offsetting other forces that tend to spread the wheels apart. Toe-out The amount the front wheels are closer together at the rear than at the front. On front wheel drive vehicles, a slight amount of toe-out is usually specified. Tools For full information on choosing and using tools, refer to the Haynes Automotive Tools Manual. Tracer A stripe of a second colour applied to a wire insulator to distinguish that wire from another one with the same colour insulator. Tune-up A process of accurate and careful adjustments and parts replacement to obtain the best possible engine performance. Turbocharger A centrifugal device, driven by exhaust gases, that pressurises the intake air. Normally used to increase the power output from a given engine displacement, but can also be used primarily to reduce exhaust emissions (as on VW’s “Umwelt” Diesel engine). U Universal joint or U-joint A double-pivoted connection for transmitting power from a driving to a driven shaft through an angle. A U-joint consists of two Y-shaped yokes and a cross-shaped member called the spider. V Valve A device through which the flow of liquid, gas, vacuum, or loose material in bulk may be started, stopped, or regulated by a movable part that opens, shuts, or partially obstructs one or more ports or passageways. A valve is also the movable part of such a device. Valve clearance The clearance between the valve tip (the end of the valve stem) and the rocker arm or tappet. The valve clearance is measured when the valve is closed. Vernier caliper A precision measuring instrument that measures inside and outside dimensions. Not quite as accurate as a micrometer, but more convenient. Viscosity The thickness of a liquid or its resistance to flow. Volt A unit for expressing electrical “pressure” in a circuit. One volt that will produce a current of one ampere through a resistance of one ohm. W Welding Various processes used to join metal items by heating the areas to be joined to a molten state and fusing them together. For more information refer to the Haynes Automotive Welding Manual. Wiring diagram A drawing portraying the components and wires in a vehicle’s electrical system, using standardised symbols. For more information refer to the Haynes Automotive Electrical and Electronic Systems Manual. Index REF•17 Note: References throughout this index relate to Chapter•page number A Accelerator cable - 3•12, 13•80 Accelerator control system - 13•75 Accelerator pump - 3•7, 3•8, 3•11, 13•66 Acknowledgements - 0•4 Aerial - 9•10 Air bags - 0•5 Air cleaner - 3•4, 13•60, 13•69, 13•67, 13•75, 13•79 Air pressure switch - 13•70 Air temperature sensor - 13•76 Airflow meter - 13•67, 13•69, 13•80 Alternator - 9•3, 13•58, 13•103, 13•104 Alternator fault - 9•14 Anti-flooding device - 3•8, 3•9, 3•10, 3•11, 13•64 Anti-knock sensor - 13•86, 13•90 Anti-roll bar - 13•111 Antifreeze - 0•6, 0•13, 2•1, 2•2 Antiskid system - 13•103 Armrest - 13•112 Asbestos - 0•5 Auxiliary shaft - 1•29, 1•30, 13•51, 13•53 B Battery - 0•5, 9•2 Battery fault - 9•14 Bleeding brakes - 8•7 Bleeding clutch - 13•94 Bodywork - 12•1 et seq, 13•111, REF•4 Bonnet - 12•3, 12•4 Boots - 7•2, 10•2, 13•98 Brake fluid - 0•13, 8•1, 13•110, 13•111 Braking system - 8•1 et seq, 13•100, REF•1, REF•2, REF•3 Braking system fault finding - 8•9 Breakerless ignition system - 13•85, 13•86 Bumpers - 12•4, 12•11, 13•113 Burning - 0•5 C Cables - 3•12, 5•1, 8•9, 9•8, 13•80 Calipers - 8•3, 13•101, 13•102 Camshaft - 1•19, 1•21, 1•24, 1•29, 1•32, 13•21, 13•30, 13•34, 13•41, 13•42 Capacities - 0•6, 13•17 Carburettors - 3•6 to 3•11, 13•62 to 13•66 Carpets - 12•2 Cassette player- 9•10 Catalytic converter - 13•77 Central door locking - 9•11, 13•109 Centre console - 12•9 Check control (warning module) system 9•12, 9•13, 13•110, 13•111 Choke - 3•11, 3•12 Cigar lighter - 9•13, 13•109 Clock - 9•13, 13•108 Clutch - 5•1 et seq, 13•83, 13•92, 13•94 Clutch fault finding - 5•3 Clutch fluid - 0•13 CO emissions (mixture) - REF•4 Coil - 4•6, 13•86, 13•90, 13•91 Coil spring - 11•3, 11•4 Condenser - 4•5 Connecting rods - 1•12, 1•18, 1•22, 1•26, 1•30, 13•25, 13•26, 13•30, 13•35, 13•47, 13•48, 13•53 Console - 12•9 Constant velocity joint - 0•13, 7•3, 13•98, 13•99 Contact breaker points - 4•2, 4•3 Contents - 0•2 Control panel - 13•108 Conversion factors - 0•14 Coolant - 0•6, 0•13, 2•1, 2•2, 13•69, 13•70, 13•110, 13•111 Coolant pump - 2•4, 13•55, 13•58 Cooling and heating systems - 2•1 et seq, 13•54, 13•55 Cooling and heating systems fault finding 2•8 Courtesy lamp - 9•5, 9•8 Crankcase - 1•17 Crankcase ventilation system - 1•8 Crankshaft - 1•18, 1•20, 1•30, 1•31, 13•44, 13•45, 13•52 Crossmember - 11•4 Crushing - 0•5 CV joints - 0•13, 7•3, 13•98, 13•99 Cylinder block - 1•17 Cylinder head - 1•10, 1•16, 1•19, 1•22, 1•25, 1•28, 1•32, 13•19, 13•22, 13•30, 13•34, 13•43, 13•44, 13•53 D Dents in bodywork - 12•2 Depressurisation (fuel system) - 13•75 Digiplex 2 ignition system - 13•90 Dim-dip system - 13•106 Dimensions - 0•6, 13•17 Direction indicators - 9•7 Discs - 8•4, 13•101, 13•102 Distributor - 4•3, 4•5, 13•86, 13•89, 13•90, 13•92 Doors - 9•11, 12•5, 12•6, 12•7, 13•111, 13•112, 13•114, REF•2 Drivebelts - 2•3, 13•58 Driveshaft Driveshafts and hubs fault finding - 7•6 Driveshafts, hubs, roadwheels and tyres 0•13, 7•1 et seq, 10•4, 11•3, 11•6, 13•98, 13•99, REF•3, REF•4 Drums - 8•4 Dwell angle - 4•4 E Economy gauge (Econometer) - 3•11, 9•12 Electric shock - 0•5 Electric windows - 9•11, 13•109 Electrical control circuit (ECU) - 13•67, 13•71, 13•81, 13•86, 13•90 Electrical system - 9•1 et seq, 13•103, REF•2 Electrical system fault finding - 9•14, REF•9 Electronic ignition - 4•3, 4•6, 4•7 Engine - 1•1 et seq, 13•19, 13•33, 13•37 Engine fault finding - 1•35, 1•36, 2•8, 3•13, 4•9, 13•92, REF•10, REF•11 Engine oil - 0•6, 0•13, 1•3, 1•4, 1•8 Engine speed sensor - 4•7, 13•89, 13•91 Environmental considerations - REF•8 Exhaust emission checks - REF•4 Exhaust manifold - 13•77 Exhaust system - 3•12, REF•3 REF REF•18 Index F H Facia - 12•10, 13•107 Fan - 2•3, 13•57, 13•71, 13•84 Fast idle adjustment - 3•7, 3•9, 3•10, 3•11, 13•64 Fault finding - REF`•9 et seq Fault finding - braking system - 8•9 Fault finding - clutch - 5•3 Fault finding - cooling and heating systems - 2•8 Fault finding - driveshafts and hubs - 7•6 Fault finding - Econometer - 9•12 Fault finding - electrical system - 9•14, REF•9 Fault finding - engine - 1•35, 1•36, 2•8, 3•13, 4•9, 13•92, REF•10, REF•11 Fault finding - fuel system - 3•9, 3•13, 13•84 Fault finding - ignition system - 4•9, REF•11 Fault finding - Microplex ignition system 13•92 Fault finding - steering - 10•4 Fault finding - suspension - 11•6 Fault finding - transmission - 6•4 Fault finding - turbocharger system - 13•84 Filling - 12•3 Final drive output shafts - 13•94 Fire - 0•5 Float adjustment - 3•7, 3•8, 3•10, 3•11, 13•64, 13•66 Flywheel - 1•19, 1•21, 1•31, 13•46, 13•53 Fog lamps - 13•106 Fuel evaporation control system - 13•78 Fuel filter - 13•67, 13•72, 13•74, 13•79 Fuel gauge fault - 9•14 Fuel injection electronic control unit (ECU) - 13•77 Fuel injection system - 13•68, 13•69 Fuel injection system fault finding - 13•84 Fuel injectors - 13•69, 13•70, 13•71, 13•76, 13•77, 13•81, 13•84 Fuel level transmitter - 3•5 Fuel pressure regulator - 13•70 Fuel pump - 3•5, 13•61, 13•69, 13•72, 13•76, 13•80, 13•81 Fuel rail - 13•70, 13•81 Fuel system - 3•1 et seq, 13•60, REF•4 Fuel system fault finding - 3•9, 3•13 Fuel tank - 3•5, 13•61, 13•72 Fume or gas intoxication - 0•5 Fuses - 9•5, 13•105 Handbrake - 8•8, 8•9, REF•1 Handles - 12•11 HC emissions - REF•4 Headlamp - 9•6, 9•7, 13•105, 13•106 Heated tailgate window - 9•10 Heater - 2•5, 2•6, 13•58, 13•59, 13•108 Heater fault - 2•8 Horn - 9•6, 13•106 Horn fault - 9•14 HT leads - 13•92 Hubs - 7•3, 7•4, 11•3 Hydraulic hoses and pipes - 8•6 Hydraulic system - 8•7 Hydrofluoric acid - 0•5 G Gaiters - 7•2, 10•2, 13•98 Gashes in bodywork - 12•2 Gaskets - 1•20 Gearbox - See Transmission Gearchange lever - 6•2 Gearchange linkage - 13•94, 13•95 Glossary of technical terms - REF•13 et seq Grille - 12•3, 13•113 I Idle speed adjustment - 3•7, 13•62, 13•65, 13•68, 13•75, 13•79 Idling fault - 1•36, 3•13, 13•84 Ignition coil - 13•86, 13•90, 13•91 Ignition switch - 4•8 Ignition system - 4•1 et seq, 13•85 Ignition system fault finding - 4•9, 9•14, REF•11 Ignition unit - 13•89 Indicators - 9•7 Injectors - 13•69, 13•70, 13•71, 13•76, 13•77, 13•81, 13•84 Inlet manifold - 13•70, 13•77, 13•80 Instrument panel - 9•8, 13•107 Intercooler - 13•84 Interior lamps - 9•5, 9•8 Introduction to the Fiat Uno - 0•4 J Jacking - 0•8 Joint mating faces and gaskets - REF•8 Jump starting - 0•7 L Lambda sensor - 13•82 Lamps - 9•6, 9•7, 9•8 Leaks - 0•9, 1•36, 13•84 LED (light emitter diode) - 9•12 Lights fault - 9•14 Locknuts, locktabs and washers - REF•8 Locks - 9•11, 10•4, 12•4, 12•6, 12•7, 13•109 Loudspeakers - 9•11 Lubricants and fluids - 0•13 M Magnetic impulse generator winding 13•86 Main bearings - 1•20, 1•30, 13•52 Maintenance - 0•10, 13•18 Manifolds - 3•12, 13•70, 13•77, 13•80 Master cylinder - 8•5, 13•103, 13•93 Microplex ignition system - 13•86, 13•89 Microplex ignition system fault finding 13•92 Mirrors - 12•11, 13•111, REF•1 Misfire - 1•35, 4•9, REF•11 Mixture adjustment - 3•7, 13•62, 13•65, 13•68, 13•75, 13•79 MOT test checks - REF•1 et seq Mountings - 1•13, 1•27, 13•26, 13•35, 13•49 N Needle valve - 13•66 Number plate lamp - 9•7 O Oil cooler - 13•36 Oil filter - 1•8 Oil level sensor - 13•110, 13•111 Oil pressure fault - 1•36, REF•11 Oil pump - 1•13, 1•19, 1•22, 1•26, 1•29, 13•24, 13•30, 13•35, 13•46, 13•53 Oil seals - 1•20, 13•41, 13•44, 13•45, 13•94, REF•8 Oil, engine - 0•6, 0•13, 1•3, 1•4, 1•8 Oil, transmission - 0•6, 0•13, 6•1, 13•14, 13•95 Overheating - 2•8, 4•9, REF•11 P Pad wear sensor - 13•110 Pads - 8•2, 13•100, 13•101 Parking lamp - 9•7 Pedals - 5•2, 8•9, 13•92, 13•102 Pinking - 1•36, 13•84, REF•11 Pistons - 1•12, 1•18, 1•22, 1•26, 1•30, 13•25, 13•26, 13•30, 13•35, 13•47, 13•48, 13•53 Plastic components - 13•111 Points - 4•2, 4•3 Poisonous or irritant substances - 0•5 Power module - 13•90 Pre-ignition - 1•36, 13•84, REF•11 Pressure regulating valve - 8•6, 13•102 Pressure sensor - 13•86 R Radiator - 2•3, 12•3, 13•57, 13•113 Radio - 9•10, 13•110 Rear lamp cluster - 9•7 Regulator (voltage) - 9•4 Regulator (window) - 12•7 Relays - 9•5, 13•71, 13•105 Repair procedures - REF•8 Respraying - 12•3 Rocker cover - 13•19 Rockers - 1•19 Roof rack - 12•11 Routine maintenance - 0•10, 13•18 Rust holes in bodywork - 12•2 Index REF•19 S T V Safety first - 0•5 Safety pressure switch - 13•90 Scalding - 0•5 Scratches in bodywork - 12•2 Screw threads and fastenings - REF•8 Seat belts - 12•10, REF•2 Seats - 12•9, REF•2 Servo unit - 8•8, 13•103 Shock absorbers - 11•4, REF•2, REF•3 Shoes - 8•3 Side light - 9•7 Side repeater lamp - 9•7 Spares - REF•10, REF•12 Spark plugs - 4•7, 13•92 Speedometer - 9•8 Spotlamp - 13•108 Springs - 11•3, 11•4, REF•3 Starter motor - 9•4, 13•104, 13•105 Starter fault - 1•35, 9•14, 13•92, REF•10 Steering - 9•5, 10•1 et seq, 13•106, REF•1, REF•2, REF•3 Steering fault finding - 10•4 Stop lamp switch - 8•9 Struts - 11•2, 13•111 Sump - 1•11, 1•22, 1•26, 1•31, 13•19, 13•24, 13•46, 13•53 Sunroof - 12•12 Supplement: Revisions and information on later models - 13•1 et seq Supplementary air valve - 13•67, 13•69, 13•71, 13•80 Suspension - 11•1 et seq, 13•111, REF•2, REF•3 Suspension fault finding - 11•6 Switches - 2•3, 4•8, 8•9, 9•5, 13•69, 13•72, 13•80, 13•90, 13•106 to 13•109 Tailgate - 9•6, 12•8, 12•9, 13•112 TDC sensor - 4•7, 13•90, 13•91 Thermostat - 2•3, 13•54, 13•57 Throttle control linkage - 13•72 Throttle position switch - 13•69, 13•72, 13•80 Throttle valve housing - 13•67, 13•70, 13•80 Tie-rod - 10•2 Timing - 4•4, 13•85, 13•91 Timing belt - 1•24, 1•29, 1•32, 13•20, 13•30, 13•35, 13•38, 13•53 Timing chain - 1•9, 1•19, 1•22 Tools - REF•5, REF•7, REF•8, REF•10 Towing - 0•8 Track control arm - 11•4 Trailing arms - 11•5 Transmission - 1•13, 1•22, 1•27, 1•32, 6•1 et seq, 13•26, 13•33, 13•36, 13•49, 13•53, 13•94, 13•96 Transmission fault finding - 6•4 Transmission oil - 0•6, 0•13, 6•1, 13•14, 13•95 Trim panels - 12•5, 13•114 Trip master - 13•108 Tripode joint - 7•3 Turbocharger - 13•82, 13•83 Turbocharger fault finding - 13•84 Tyres - 7•5, 10•4, 11•6, REF•4 Vacuum sensor - 13•86 Vacuum servo - 8•8, 13•103 Valve clearances - 1•9, 1•23, 1•32, 13•20, 13•37 Vehicle identification - REF•2, REF•12 Voltage regulator - 9•4 U Underframe - 12•1 Unleaded fuel - 13•60 Upholstery - 12•2 W Washer system - 9•10, 13•110 Water pump - 2•4, 13•55, 13•58 Weights - 0•6, 13•17 Wheel alignment - 10•3 Wheel bearings - 7•3, 7•4, REF•3 Wheel changing - 0•8 Wheel cylinder - 8•4 Wheels - 7•5, REF•4 Window regulator - 12•7 Windows - 9•11, 12•6, 12•9, 13•109, 13•113 Windscreen - 12•8, REF•1 Wings - 12•5 Wiper blade and arm - 9•9 Wiper motor - 9•9, 9•10, 13•109, 13•110 Wiper fault - 9•14 Wiring diagrams - 14•1 et seq Working facilities - REF•7 REF REF•20 Preserving Our Motoring Heritage < The Model J Duesenberg Derham Tourster. Only eight of these magnificent cars were ever built – this is the only example to be found outside the United States of America Almost every car you’ve ever loved, loathed or desired is gathered under one roof at the Haynes Motor Museum. Over 300 immaculately presented cars and motorbikes represent every aspect of our motoring heritage, from elegant reminders of bygone days, such as the superb Model J Duesenberg to curiosities like the bug-eyed BMW Isetta. There are also many old friends and flames. Perhaps you remember the 1959 Ford Popular that you did your courting in? The magnificent ‘Red Collection’ is a spectacle of classic sports cars including AC, Alfa Romeo, Austin Healey, Ferrari, Lamborghini, Maserati, MG, Riley, Porsche and Triumph. A Perfect Day Out Each and every vehicle at the Haynes Motor Museum has played its part in the history and culture of Motoring. Today, they make a wonderful spectacle and a great day out for all the family. Bring the kids, bring Mum and Dad, but above all bring your camera to capture those golden memories for ever. You will also find an impressive array of motoring memorabilia, a comfortable 70 seat video cinema and one of the most extensive transport book shops in Britain. The Pit Stop Cafe serves everything from a cup of tea to wholesome, home-made meals or, if you prefer, you can enjoy the large picnic area nestled in the beautiful rural surroundings of Somerset. > John Haynes O.B.E., Founder and Chairman of the museum at the wheel of a Haynes Light 12. < Graham Hill’s Lola Cosworth Formula 1 car next to a 1934 Riley Sports. The Museum is situated on the A359 Yeovil to Frome road at Sparkford, just off the A303 in Somerset. It is about 40 miles south of Bristol, and 25 minutes drive from the M5 intersection at Taunton. Open 9.30am - 5.30pm (10.00am - 4.00pm Winter) 7 days a week, except Christmas Day, Boxing Day and New Years Day Special rates available for schools, coach parties and outings Charitable Trust No. 292048
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