light FIAT PUNTO 1999 176 / 1.G Workshop Manual

0.4 Introduction
The Fiat Punto range was Introduced in March 1994 with 1106 cc, 1242 cc and 1372 cc petrol engines and a 1698 cc diesel engine. At first, models wero only available in 5-door Hatchback form, however 3-door versions followed in May 19SM and Cabriolet and Automatic versions In June 1994. At the seme lime a lurbo diesel model was launched. Power-ass«sted steering and ABS were offered as options in October 1994, and the 6-speed 55SX and norrrally-asptraled dieset followed in June 1995. In June 1997 a minor facelift was undertaken which Included improvements to the suspension and steering and various cosmetic changes. This facelift also saw the introduction of fie ! 242 cc DOHC 1S-valve engine available In top of the range models.
Ait engines covered in this Manual are fitted with single- or double-overhead •camshaft engines, end all models have fully independent front and rear suspension. The distinguished lines of the bodywork together with tho high level rear lighting have made the Rat Punto a very popular small car.
Provided that regular servicing is earned out In accordance with tho manufacturer's recommendations, the Flat Punto should prove reliable and economical. The engine compartment is well-designed, and most of the items needing frequent attention are easily accessible.
The Fiat Punto Team
Haynes manuals are produced by dedicated and enthusiastic people working in close co-operation. The team responsible for the creation of this book included:
Authors
Sub-editor Page Make-up Workshop manager Photo Scans
Cover illustration & Une Art
Wiring diagrams

A.K. Legg laemimi
Spencer Drayton
Ian Barnes
Steve Churchill Paul Buckland
Steve Tanswell John Martin
Roger Healing
Matthew Marke
We hope the book will help you to get the maximum enjoyment from your car. By carrying out routine maintenance as described you will ensure your car's reliability and preserve its resale value.
Your Fiat Punto Manual
The aim ol this manual is to help you get the best value from your vehicle, It can do so-ln several ways. It can help you decide what worfc must be done (even should you choose to get It dons by a garage), provide information on routine maintenance and servicing, and give a logical course of action and diagnosis when random faults occur. However, it is hoped that you will use the manual by tackling the work yourself. On simpler jobs, It may even be quicker than booking tho car into a garage and going there twice, io leave and collect it. Perhaps mosl important, a lot of money can be saved by avoiding the costs a garage must charge to cover Its labour and overheads, The manual has drawings and descriptions to show the function of the various components, so that their layoul can be understood, Then the tasks are described and photographed in a clear step-by-step sequence. References to the 'left' or 'right' are In the sense of a person in the driver's seat facing forward.
Acknowledgements Thanks are duo to the Champion Spark Plug Company, who supplied the Illustrations of various spark plug conditions. Thanks are also due to Oraper Tools 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 tho 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 oen be accepted by the authors or publishers for loss, damage or Injury caused by any errors in, or omissions from, the information given.

Safety first! 0.5
Working on your ear 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 exhau3t 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 i'j ramps. kr Never venture ™ under
a
car
vv/j/ch
Is only supported by a jack. • Take card if loosening or tightening high-torque nuts when the vehicle is on stands. Initial loosening and final tightening should be done with the wheels on the ground.
Fire • Fuel Is highly flammable; fuel vapour is explosive. • Don't (et 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 toots). • 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 repainng or modifying the vehicle wiring. • Keep a fire extinguisher handy, of a type suitable for use on fuel and electrical fires.
Electric shock x ^ ^ ? , • Ignition HT _ " voltage can be ^ dangerous, ~ especially to > people with heart problems or a pacemaker. Don't work on or near the f^ ignition system with fT") the engine running or ' J ' J the Ignition switched on.
• 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 oll-soaked 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.
Asbestos • Asbestos dust can cause cancer if inhaled or swallowed. Asbestos may be found In gaskets and in brake and clutch linings. When dealing with soch components It is safest to assume that they contain asbestos.
Special hazards
Hydrofluoric acid • This extremely corrosive acid is formed when cerlam types of synthetic rubber, found In some O-rings, oil seals, fuel hoses etc. are exposed to temperatures above 400;C. The rubber changes into a charred or sticky substance containing the acid. Once formed, the acid remains dangerous for years, tfit 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 steenng 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.

A


Warning: Never expose the hands, face or any otfterpart of the body to injector spray; the fuel can penetrate the skin with potentially fatal results.
Remember...
DO • Do use eye protection when using power tools, and when working under the vehicle. • 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, wrtstwatch 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 • Don't attempt to lift a heavy component which may be beyond your capability - get assistance. • Don't rush to finish a job. or take unverified short cuts. • Don't use ill-fitting toots 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.

o.6 Roadside repairs
The following pages are Intended to help In dealing with common roadside emergencies and breakdowns. You will find more detailed fault finding information at the back of the manual, and repair Information In the main chapters.
If your car won't start
and the starter motor
doesn't turn
If your car won't start
even though the starter
motor turns as normal
tf it's a model with automatic transmission, make sure the selector is in P or N. Open the bonnet and make sure that the battery terminals are clean and tight. Switch on the headlights and try to start the engine. If the headlights go very dim when you're trying to start, the battery is probably flat. Get out of trouble by Jump starting (see next page) using a friend's car.
• Is there fuel In the tank? • Is there moisture on electrical components under the bonnet? Switch off the ignition, then wipe off any obvious dampness with a dry cloth. Spray a water-repellent aerosol product (WD-40 or equivalent) on ignition and fuel system electrical connectors like those shown in the photos. Pay special attention to the ignition coil wiring connector and HT leads. (Note that Diesel engines don't normally suffer from damp.)

A

Check that the spark plug HT leads are securely connected by pushing them onto the plugs (petrol engine models).
B

Check that the wiring to the engine compartments is securely connected.
C

Check the security and condition of the battery terminals,
Check that electrical connections are secure (with the ignition switched off) and spray them with a water dispersant spray tike WD40II you suspect a problem due to damp

Roadside repairs 0.7
I Jump starting will get you out of trouble, but you must correct | whatever made the battery go fiat in the first place. There are three possibilities:

t

The battery has been drained by repeated attempts to start, or by leaving the lights on.

2

The charging system (s not working property (alternator drivebelt slack or broken, alternator wiring fault or alternator Itself faulty).

3

The battery Itself is at fault (ehctrotyte low, or battery worn out).
When jump-starling a car using a booster battery, observe the following precautions:
• Before connecting the booster battery, make sure that the ignition is switched off.
• Ensure that all electrical equipment (lights, heater, wipers, etc) is switched off.
• Take note of any special precautions printed on the battery case.
Jump starting • Make sure that the booster battery Is the same voltage as the discharged one in the vehicle.
• If the battery is being jump-started from the battery in another vehicle, the two vehicles MUST NOT TOUCH each other.
• Make sure that the transmission is in neutral (or PARK. In the case of automatic transmission).
Make sure that the lump leads will not come into contact with the fan. drive-belts or other moving parts of the engine.
Start the engine using the booster battery and run it at idle speed. Switch on the lights, rear window demister and heater blower motor, then disconnect the jump leads in the reverse order of connection. Turn off the lights etc.

o«8
Roadside repairs
Wheel changing
Some of the details shown horo will vary according to model. For Instance, the location of the spare wheel and jack is not the same on all cars. However, the basic principles apply to aii vehicles-
Preparation
• When a puncture occurs, stop as soon as it Is safe to do so. • Park on firm level ground. If possible, and v/etl out of the way of other traffic. • Use hazard warning lights if necessary.
Changing the wheel
A
Warning: Do not change a wheel (n a situation where you risk being hit by another vehicle. On busy roads, try to stop in a fay-by or a gateway. Be wary of passing traffic white changing the wheel - it Is easy to becomo distracted by the job in hand.
If you have one, use a warning triangle to alert other drivers of your presence. Apply the handbrake and engage first or reverse gear (or P on models with automatic transmission).
• Chock the wheel diagonally opposite the one being removed - a couple of largo stones will do for this. G If the ground is soft, use a flat piece of wood to spread the load under the iack.

I

Tbe spare wheel and tools (Including the jack) are stored
In
the luggage compartment beneath the floor covering. Unscrew the central plastic nut to remove the tool holder.
Slacken each wheel bolt by a half turn Locale the jack under the triangular mark on the 6)11 next to the wheel to be changed, on firm ground

4

Turn the Jack handle clockwise until the wheel Is raised clear of the ground Unscrew the wheel bolts, withdraw the trim and remove the whed
6

Fit Ihe spare wheel on the pins, and screw In the bolts. Lightly lighten tho bolts with the wheelbrace then lowor the vehicle to the ground
Finally...
Securely lighten the wheel bolts in Ihe sequence shown. Note that the wheel bolts should be slackened and retightened to the specified torque at the earliest possible opportunity.
• Remove l)>e wheel chocks.
• Stow the punctured wheel, jack and tools in the correct locations in the car. • Check the tyre pressure on the wheel just fitted. If it is low. or It you don't have a pressure gauge with you, drive slowly to the nearest garage and inflate the tyre to Ihe right pressure.
D When using tho space-saver spare wheel, do not exceed 50 mph (SO kph). C Have the damaged tyre or wheal repaired as soon as possible.

Roadside repairs 0.9
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.
A
Warning: Most automotive oils and fluids aro poisonous. Wash them off skin, and change out of contaminated clothing, without delay.
Identifying leaks
The smell of 0 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 carefully and to park It over some clean paper overnight as an aid to locating the source of the leak. Remember that some leaks may only occur while the engine is running.
Sump oil
Engine oil may leak from the drain plug...
Antifreeze
Leaking antifreeze often leaves a crystalline oeposit like this.
Oil from filter
A leak occurring at a wheel Is almost certainly brake fluid.
Gearbox oil
Gearbox oil can leak from the seals at the inboard ends of the drivoshafts.
Power steering fluid
Power steering fluid may leak from the pipe connectors on the steering rack.
When ail else falls, you may llnd yourself having to get a tow home - or of course you may be helping somebody else. Long-distance recovery should only be done by a garage or breakdown service. For shorter distances. OIY towing using another car is easy enough, but observe the following points: • Use a proper tow-rope - they are not expensive. The vehicle being towed must display an ON TOW sign in its rear window. • Always turn the Ignition key to the ON position when the vehicle is being towed, so that the steering lock is released, and that the direction indicator and brake lights will work. • Only attach the tow-rope to the towing eyes provided.
• Before being towed, release the handbrake and select neutral on the transmission. • Note that greater-then-usual pedal pressure will be required to operate the brakes, since the vacuum servo unit is only operational with the engine running. • On models with power steering, greater-than-usual steering effort will also be required. • The driver of the car being towed must keep the tow-rope taut at all times to avoid snatching. • Make sure that both drivers know the route before setting off. • Only dnve at moderate speeds and keep the distance towed to a minimum. Drive smoothly and allow plenty of time for slowing down at junctions.
Towing
• On models with automatic transmission, special precautions apply(see Chapter 7B. Section 1). If In doubt, do not tow, or transmission damage may result. • The front towing eye is supplied as part of the tool kit stored in the luggage compart-ment. To fit the eye pnse out the plastic cover from the front or rear bumper using a screwdriver, then screw the eye onto the threaded pin as tightly as possible.

A


Warning: To prevent damage to the catalytic converter, e vehicle must not be push'started, or started by towing, when the engine is at operating temperature. Use jump leads (see Jump starting).

Weekly checks 0.13
Brake fluid level
A
Warning: • Brake fluid can harm your eyes and damage painted surfaces, so use extreme caution when handling and pouting it.
• Do not use fluid that has been standing open for so mo time, as It absorbs moisture from the air, which can cause a dangerous loss of braking effectiveness.
Mpmna * Make sure that your car Is I on level ground. HiNTi * Th* ffftt 'eve/ In the reservoir will drop slightly as

I

The MIN and MAX marks are indicated on the side of Ihe reservoir The fluid level must be kept between the marks at all times.

2

11 topping-up is necessary, first wipe clean the area around the filler cap to prevent dirt entering the hydraulic system.
the brake pads wear down, but the fluid level must never be allowed to drop below the "MIN" mark.
Safety First! • If the reservoir requires repeated topping* up this is an indication of a fluid leak somev/here In the system, which should be investigated immediately.
• If a leak is suspected, the car should not be driven until the braking system has been checked. Never take any risks where brakes are concerned.
Unscrew the reservoir cap and carefully lift it out of position, taking care not to damage the level switch float. Inspect the reservoir: if the fluid Is dirty Ihe hydraulic system should be drained and refilled (see Chapter 1A or 1B).

4

Carefully add fluid, taking care not to spill it onto the surrounding components, Use only the specified fluid; mixing different types can cause damage to the system. After topping-up to the correct level, secureiy refit the cap and wipe off any spilt fluid.
Power steering fluid level
Before you start: •Park the vehicle on level ground. • Set the steering wheel straight-ahead. •
The
engine should be turned off.

I

The reservoir is located on the right-hand side of the bulkhead in the engine compartment. Wipe clean the area around the reservoir filler cap then unscrew It from the reservoir.
For the check to be accurate, the steering must HlHT; not be turned once the engine has been stopped.


2

Dip the fluid with the reservoir cap/ dipstick (do not screw the cap into position). When the engine is cold, the fluid level should be up to Ihe MIN mark (B): when hot. it should be on the MAX mark (A).
Safety First! • The need for frequent topping-up indicates a leak, which should be investigated immediately.

3

When topping-up, use the specified type of lluid and do noi overfill the reservoir. When the level is correct, securely refit the cap.

o»i4 Weekly checks
Tyre condition and pressure
l( is very important that tyres are In good condition, and at the correct pressure - having a tyre (allure at any speed is highly dangerous. Tyre wear is influenced by driving style • harsh braking and acceleration, or fast cornering, will ail produce more rapid tyre wear. As a general rule, the front tyres wear out faster than the rears. Interchanging the tyres from front to rear ("rotating' the tyres) may result in more even wear. However, if this is completely effective, you may have the expense of replacing ail four tyres at once! Remove any nails or stones embedded In the tread before they penetrate the tyro to cause deflation. If removal of a nail does reveal that
r
the tyre has been punctured, refit the nail so (hat its point of penetration is marked. Then Immediately change the wheel, and have the tyre repaired by a tyre dealer. Regularly check the tyres for damage (n the form of cuts or bulges, especially in the sidewails. Periodically remove the wheels, and clean any dirt or mud from the Inside and outside surfaces. Examine the wheel rims for signs of rusting, corrosion or other damage, Light alloy wheels are easily damaged by •kerbing"1 whilst parking; steel wheels may also become dented or buckled. A new wheel Is very often the only way to overcome severe damage.
New tyres should be balanced when they are fitted, but it may become necessary to re-balance them as they wear, or if the balance weights fitted to the wheel rim should fall off. Unbalanced tyres will v/ear more quickly, as will the steering and suspension components. Wheel imbalance is normally signified by vibration, particularly at a certain speed (typically around 50 mph). If this vibration is fett only through the steering, then II Is likely that |ust the front wheels need balancing. H, however, the vibration is felt through the whole car. the rear wheels could be out of balance. Whoel balancing should be carried out by a tyre dealer or garage.
-j Tread Depth • visual check The original tyres have tread wear safety bands {8}, which wiU appear when the tread depth reaches approximately 1.6 mm. The band positions are indicated by a triangular mark on the tyre sidewail (A).
Tyre tread wear patterns
2 Tread Depth * manual check Alternatively, tread wear can be monitored with a simple, inexpensive device known as a tread depth indicator gauge.
2 Tyre Pressure Check Check the tyre pressures regularly with the tyres cold. Do not adjust the tyre pressures immediately alter the vehicle has been used, or an inaccurate setting will result Tyre pressures are shown on page 0*18.
Shoulder Wear Centre Wear Uneven Wear
Underinflatlon {wear an both sides) Under-lnflatton will cause overheating of the tyre, because the tyre will flex too much, and the tread will not sit correctly on the road surface. This will cause a loss of grip and excessive wear, not to mention the danger of sudden tyre failure due to heat build-up. Check and adjust pressures Incorrect wheel camber (wear on one side] Repair or renew suspension parts Hard cornering Reduce speed!
Overinflation Over-inflation will cause rapid wear of the centre part of the tyro tread, coupled with reduced grip, harsher ride, and the danger of shock damage occurring in the tyre casing. Check and adjust pressures
It you sometimes have (o inflate your car's tyres to the higher pressures specified tor maximum load or sustained high speed, don't forget to reduce the pressures to normal afterwards.
Front tyres may wear unevenly as a result of wheel misalignment. Most lyre dealers and garages can check and adjust the wheel alignment (or 'tracking") for a modest charge. Incorrect camber or castor Repair or renew suspension parts Malfunctioning suspension Repair or renew suspension parts Unbalanced wheel Balance tyres Incorrect toe setting Adjust front wheel alignment Note: The feathered edge of I he treed which typifies toe wear is best checked by feel.

o«i6 Weekly checks
Battery
Caution: Before carrying out any work on the vehicle battery, read the precautions given In "Safety first" at the start of this manual. • Make sure thai the battery tray is in good condition, and that the clamp Is tight. Coirosion on the tray, retaining clomp and the battery itself can be removed with a solution of water and baking soda, Thoroughly rinse all cleaned areas with water. Any metal parts damaged by corrosion should be covered with a zinc-based primer, then painted. • Periodically (approximately every three months), check the charge condition of the battery as described In Chapter SA. • If the battery Is flat, and you need to jump start your vehicle, see Roadside Repalrz.
Battery corrosion can be kept to a minimum by applying o layer of petroleum Jelly to the clamps and terminals after they are reconnected
fin %

I

The battery is located on the left-hand side of the engine compartment, The exterior of the battery should be inspected penodlcaily for damage such as a cracked case or cover.

2

Check the tightness of battery clamps (A) to ensure good electrical connections. You should not be able to move them. Also check each cable (B) for cracks and frayed conductors.

3

If corrosion (while, fluffy deposits) is evident, remove the cables from the battery terminals, clean them with a small wire brush, then refit them. Automotive stores sell a tool for cleaning the battery post...
as well as the battery cable clamps
Electrical systems
• Check all external lights and the horn. Refer to the appropriate Sections of Chapter 12 for details if any of the circuits are found to be Inoperative,
• Visually chock all accessible wiring connectors, harnesses and retaining clips for security, and for signs of chafing or damage.
fffjffflg^ " y°u A**^ check your "T™*! broke lights and Indicators ,HllMT[ unaided, back up to a wall or garage door and operate the lights. The reflected light shouid show
If
they are working property.

I

I? a single indicator light, stop-light or headlight has failed, it Is likely that a bulb has blown and will need to be replaced. Refer to Chapter 12 for details. If both stop-lights have failed, it is passible that the switch has failed (see Chapter 9).

2

If more than one Indicator light or tail light has failed It is likely that either a fuse has blown or that there is a fault tn the circuit (see Chapter 12). The fuses are located behind the oddments tray on ihe facia. First unscrew the two screws and swivel Ihe tray down.

3

To replace a blown fuse, simply pull it out using the special plastic tool and fit a new fuse of tho correct rating (see Chapter 12). If the fuse blows again, it is importont that you find out why - a complete checking procedure Is given in Chapter 12.

1A»1
Chapter
1
Part A:
Routine maintenance & servicing - petrol models
Contents

Air
filter renewal 18 Automatic transmission filter and fluid change 2B Auxiliary dr cmI
and filter renewal 3 Evaporative loss system check 27 Exhaust system check 8 From brake pad check 5 Fuel filter renewal 17 Headlight beam adjustment 23 Hinge and lock lubrication 22
Hose and fluid leak check 7 Idle speed and CO content check and adjustment .11 Ignition system check 20 Introduction 1 Lambda/oxygen sensor check 25 Manifold mounting check 16 Manual transmission oil level check 26 Manual transmission oil renewal .32 Pollen filter renewal 10 Rear brake shoe check 29 Regular maintenance 2 Road test 24 Spark plug renewal 19 Steering and suspension check 12 Timing belt renewal 30 Underbody sealant check 6 Valve clearance check and adjustment 15
Degrees of difficulty
Easy, suitable for ^ novice with little experience ^
Fairty easy, suitable for beginner with ^ some experience
FaMy difficult, ^ sitable for competent jj^ DIY mechanic ^
Difficult, suitable for experienced DIY aJ mechanic ^
Very difficult, ^ suitable for expert DIY or professional ^
expert22 fl/ia http://rutracker.org