Egr FIAT PUNTO 1995 176 / 1.G Workshop Manual

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<vebelt{s} check and renewal 13 SiakB fluid renewal 34 Brake warning lamp operation check 4 Clutch adjustment check 14 Coolant renewal 33 Drivoshaft gaiter check 9 Emission control system chock 31 Engine management system check 21 Engine
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

Every 20 000 miles - petrol models ia-h
clearance within specification. For example, if the measured valve clearance was 1.27 mm too great, a shim thicker by this amount will be required. Conversely, if the clearance was 1.27 mm too small, a shim thinner by this amount will be required. 13 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 (see illustration). t4 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. 15 If more than two or three valve clearances are found to be incorrect, it will be more convenient to remove the camshaft for easier removal of the shims. 16 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. 17 On completion, refit the camshaft cover and gasket, air cleaner and duct, and spark plugs. 18 lower the vehicle to the ground.
16 Manifold mounting check
Refer
1O
Chapters 4A. 48 and 4D and check tne tightness of the nuts and bolts securing the inlet and exhaust manifolds.
17
Fuel
filter renewal I I
Warning: Before carrying out the !\ f°llow'n9 operation, refer to the precautions given In Safety firstI A
15.13 Shim thickness is marked on the tower face (here 4.20 mm) 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. Note: 1242 cc (8-vatve) engine mode's from 1998 onwards are equipped with a modified fuel system incorporating a fuel fitter integral with the fuel pump. On these engines fuel filter renewal is not required. 1 The fuel filter is situated underneath the rear of the vehicle, on the right-hand side of the fuel tank (see illustration). To gain access to the filter, chock the front wheels, then jack up the rear of the vehicle and support it on axle stands (see Jacking and vehicle support). 2 Unscrew the bolt securing the filter to its support bracket. 3 Noting the fitted position of the filter body, release the retaining clips and disconnect the fuel hoses from the filter. The correct position is indicated by an arrow marked on ihe filter body 4 Remove the filter from the vehicle. Dispose safely of the old filter; it will be highly flammable, and may explode if thrown on a fire. 5 Locate the new filter into position, ensuring that the arrow on the filter body is pointing in the direction of the fuel flow, as noted when removing the old filter. The flow direction can otherwise be determined by tracing the fuel hoses back along their length. 6 Connect the fuel hoses to the filter and lighten the clips, then locate it in the support bracket and tighten the mounting bolt.
17.1 Fuel filter location on tho right-hand side of the fuel tank 7 Start the engine, check the filter hose connections for leaks, then lower the vehicle to the ground.
18 Air fitter renewal
I
f f 08 cc and 1242 cc (8-valve) engines 1 Prise open the spring clips and withdraw the air cleaner cover a little way from the main body (see illustration). Leave the cover attached to the hot air tube and inlet duct. 2 Lift out the filter element (see illustration). 3 Remove any debris that may have collected inside the air cleaner and wipe the inner surfaces clean. 4 Fit a new air filter element In position, ensuring that the edges are securely seated. 5 Refit the air cleaner top cover and snap the retaining clips into position.
1242 cc (16-valve) engines 6 Undo the three bolts securing the front of Ihe air cleaner cover to the main body. Lift the cover up at the front, disconnect the rear retainers and move it clear of the main body {see illustration). Leave the cover attached to the hot air tube and inlet duct. 7 Lift out the filter element (see illustration). 8 Remove any debris that may have collected inside the air cleaner and wipe the inner surfaces clean.
18.1 Prise open the spring clips... . and remove the filter element (8-valve engines)
18.6 Undo the three bolts (arrowed) and disconnect the air cleaner cover rear retainers (16-vatve engines)

1B»1
Chapter
1
Part B:
Routine maintenance & servicing - diesel models
Contents
Air filter renewal 13 Auxiliary drivebelt(s) check and renewal 16 Brake fluid renewal 2d Brake warning lamp operation check 5 Clutch adjustment check 17 Coolant renewal 27 Drtv«shaft gaiter check 10 Emissions control systems check 25
Engage
oil and filter renewal 3 Exhaust system check 9 Front brake pad check 6
Fuel
fitter renewal 12 Fuel Filter water draining 4 Headlight beam adjustment 20
Hinge and lock lubrication 19 Hose and fluid leak check 6 Idle speed check and adjustmenl 11 Introduction ... 1 Manual transmission oil level check 22 Manual transmission oil renewal - 26 Pollen filter renewal 14 Rear brake shoe check 23 Regular maintenance 2 Road test 21 Steering and suspension check 15 Timing belt renewal 24 Underbody sealant check 7 Valve clearance check and adjustment 16
^m
Degrees of difficulty
Easy, sutable for % Fairly easy, suitable FaHycifficult, i'. Difficult, suitable fa Very difficult, novice with irttte % for beginner with suitable for competent experienced DIY
1
suitable for expert DIY * or professional jQ experience some experience DIY mechanic mechanic 1
suitable for expert DIY * or professional jQ

2A«1
Chapter 2 Part A:
SOHC (8-valve) petrol
engine in-car repair procedures
Contents
Auxiliary drivebelts • removal and refitting See Chapter 1A Gamstaft cover - removal and refitting 6 Camshaft oil seal - renewal 7 Camshaft • removal and refitting See Chapter 20 Crankshaft oil seals - renewal 8 Cylinder compression test 3 Cylinder head - dismantling and overhaul See Chapter 20 Cylinder head - remove] and refitting 9 Engine mountings - Inspection and renewal 11 Engine oil and filter • renewal See Chapter 1A
Degrees of difficulty
Engine oil level check See Weekiy checks Flywheel/driveplate • removal, inspection and refitting 10 General Information 1 Location of TOC on No 1 cylinder 2 Oil pump and pick-up tube - removal, inspection and refitting 13 Sump • removal and refitting 12 Timing belt and covers • removal and refitting .. 4 Timing belt tensioner and sprockets - removal, inspection and refitting 5 Vafve clearance check and adjustment See Chapter 1A
Easy, suitable (or twics with little |g experience ^
Fairty easy, suitable jk for beginner with & some experience ^
Fatrty difficult, ^ suitable for competent ^ CKYmechanic ^
Difficult, suitable for ^ experienced DIY « mechanic ^
Veiy difficult, ^ aiitabte for expert DIY « or professional
Specifications
General Engine code:' 1108 cc engine (55 models): Up to May 1997 176.A6.000 May 1d97 onwards • . 176.B2.000 1242 cc engine (60 models): Up to May 1997 176.B1.000 May 1997 onward 176.B4.000 1242 cc engine (75 modete) 176.A8.000
•Note:
See Vehicle Identification for the location of code marking on the engine. 8cre: 11O0OC engine 70.0 mm 1242 cc engine 70.8 mm Stroke: 1108 cc engine 72.0 mm 1242 cc engine 78.86 mm Compression ratio: 1108 cc engine 9.6:1 1242 cc engine with single-point injection 9.6:1 1242 cc engine with multi-point injection 9.8:1 Rrlng order 1-3-4-2
No 1
cylinder location Timing belt end of engine
TnUng
belt tension See text
Lubrication system
Oil
pump type By-rotor driven from front of crankshaft Outer rotor-to-housing clearance 0.080to0.186mm
Axial
clearance 0.025 to 0.056 mm

2A*10 SOHC (8-valve) petrol engine in-car repair procedures
Torque wrench settings Nm
IM
ft Camshaft cover 8 6 Camshaft sprocket 70 52 Cylinder head; Stage 1 30 22 Stage 2 Angle-lighten a further 90° Siege 3 Angle-tighten a further 90B Crankshaft sprocket centre bott 100 74 Engine mounting bolt: M10X1.25 69 44 MB 25 18 Engine mounting nut (M10x 1.25) 60 44 Flywheet/driveplate 44 32 Sump 10 7 Timing belt tensJoner 28 21
1 General information
Using this Chapter Chapter 2 is divided Into four Parts: A. 8. C and D. Repair operations that can be carried out with the engine in the vehicle are described in Part A. SOHC (8-valve) petrol engines, Part B. DOHC (18-valve) petrol engines and Part C, diesel engines. Part 0 covers the removal of the engine/transmission as a unit, and describes the engine dismantling and overhaul procedures. In Parts A, 9 and C, the assumption Is made lhat the engine is Installed in the vehicle, with sll ancillaries connected. If the engine has been removed for overhaul, the preliminary dismantling Information which precedes each operation may be ignored.
Engine description Throughout this Chapter, engines are identified by their capacities. A listing of all engines covered, together with their code letters, is given in the Specifications. The engines covered In this Part of Chapter 2 are water-cooled, single overhead camshaft, in-line four-cylinder units, with cast Iron cylinder Mocks and aluminium-alloy cylinder heads. All are mounted transversely at the front ot the vehicle, with the transmission bolted to the left-hand side of the engine, The cylinder head carries the camshaft which is driven by a toothed timing belt and runs In three bearings. It also houses the inlet and exhaust valves, which are closed by single coil springs, and which run in guides pressed Into the cylinder head. The camshaft actuates the vatves directly via cam followers mounted in the cylinder head. Adjustment of the valve clearances is by means of shims located on top of the followers. The cylinder head contains Integral oitways which supply and lubricate the tappets. The crankshafl Is supported by five main bearings, and endftoat is controlled by a thrust bearing fitted to the upper section of the centre main bearing.
Engine coolant is circulated by 8 pump, driven by the timing belt. For details of the cooling system, refer to Chapter 3. Lubricant is circulated under pressure by a pump, driven from ihe front of the crankshaft. Oil Is drawn from the sump through a strainer, and then forced through an externally-mounted, replaceable screw-on filter. From there, It is distributed to the cylinder head, where It lubricates the camshaft journals and tappets, and also to the crankcase, where il lubricates the main bearings, connecting rod big and smell-ends, gudgeon pins and cylinder bores. On 1242 cc engines, oil jets are fitted lo the base of each cylinder bore -these spray oil onto the underside of the pistons, to Improve cooling.
Repair operations possible with the engine in the car The following work can be carried out with the engine in the car a) Compression pressure - testing b) Auxiliary drivebelt - removal and refitting (refer to Chapter 1A) c) Vatve clearances - checking and adjustment (refer to Chapter I A) d) Camshaft cover - removal and refitting e) Timing belt and covens - removal and refitting f) Timing belt tensioner and sprockets -removal and refitting g) Cylinder head - removal and refitting' h) Camshaft and cam followers • removal and refitting' t) Camshaft oil seal - renews/ j) Crankshaft oil seals - renewal k) Flywheel/dnvepfate • removal, inspection and refitting l) Engine mountings - inspection and renewal m)Sump - removal and refitting n) Oil pump and pick-up tube assembly
•
removai. inspection and refitting *Cylinder head dismantling procedures are detailed In Chapter SO, with details of camshaft and cam follower removal. Note: It is possible to remove the pistons and connecting rods (after removing the cylinder head and sump) without removing the engine. However, this is not recommended. Work of
this nature is more easily and thoroughly completed with the engine on the bench, as described In Chapter 2D.
2 Location of
TDC
on % No
1
cylinder
General Information 1 The camshaft Is driven by the crankshaft, by means of sprockets and a timing belt. Both sprockets rotate In phase with each other and this provides the correct valve timing as the engine rotates. When (he liming belt is removed during servioing or repair, it Is possible for the camshaft and crankshaft to rotate Independently of each other and the correct valve timing Is then lost. 2 The design of the engines covered In this Chapter are such lhat potentially damaging piston-to-valve contact may occur if the camshaft is rotated when any of the pistons are stationary at, or near, the top of their stroke. 3 For this reason it is important lhat Ihe correct phasing between the camshaft and crankshaft is preserved whilst the timing belt Is off the engine. This is achieved by setting the engine In a reference position (known as Top Dead Centre or TDC) before the timing belt Is removed and then preventing the camshaft and crankshaft from rotating until the belt is refitted. Similarly, if ths engine has been dismantled for overhaul, the engine can be set to TOC during reassembly to ensure that Ihe correct shaft phasing is restored. 4 TDC is the highest point In the cylinder that each piston reaches as the crankshaft turns. Each piston reaches TDC at Ihe end of the compression stroke and again at the end of the exhaust stroke. However, for the purpose of timing the ongine. TDC refers to the position of No 1 piston at the end of Its compression stroke. On ail engines In this manual, No 1 piston (and cylinder) Is at the timing belt end of the engine. 5 The camshaft sprocket Is equipped with a marking which, when aligned with a reference marking on the cylinder head, indicates that the camshaft is correctly positioned for cyl-inder No 1 al TDC on its compression stroke.

2A*10 SOHC (8-valve) petrol engine in-car repair procedures
I To make o camshaft sprocket holding ; tool, obtain two lengths of steel strip I about 6 mm thick by 30 mm wide or ; similar, one €00 mm long, the other 200 mm long (all dimensions approximate). Bolt the two strips together to form a forked end, leaving the bolt slack so that the shorter strip can pivot freely. At the end of each 'prong' of the fork, secure a bolt with a nut and a locknut, to act as the fulcrums; these will engage with the cut-outs In the sprocket, and should protrude by about 30 mm
11 Check and adjust the tension of the timing tel with reference to Section 4. 12 Relit Ihe timing belt cover and tighten the bolts. 13 Relit the crankshaft pulley. 14 Refit and tension the auxiliary drivebelt(s)
as
described in Chapter 1. 15 Refil the air cleaner and air ducting as described in Chapter 4A or 48. 16 Refil the roadwheel and lower the vehicle
to the
ground.

Camshaft
sprocket
Removal 17 Remove the timing bell as described in Section 4. 16 The camshaft sprocket must now be held stationary while the retaining bolt is loosened. To
cto this,
make up a tool as follows and engage it
with the
holes
in
the sprocket (see Tool Tip). 19 Alternatively pass a rod through one of the holes in the camshaft sprocket to prevent it rotating. Position a pad of rag or a piece of
integral key
securing bolt and washer...
wood under the rod to avoid damaging the cylinder head. 20 Unscrew the bolt and slide the sprocket from the end of tho camshaft. Note the integral location key on the inner face of the sprocket (see illustrations). Inspection 21 With the sprocket removed, examine the camshaft oil seal for signs of leaking. If necessary, refer to Section 7 and renew it. 22 Check the sprocket teeth for damage. 23 Wipe clean the sprocket and camshaft mating surfaces. Refitting 24 Locate the sprocket on the end of the camshaft, then refit the bolt and washer and tighten to the specified torque while holding the camshaft stationary using the method described previously. 25 Refit the timing belt as described in Section 4.
Crankshaft sprocket
Removal 26 Remove the timing belt as described in Section 4. 27 Working beneath the engine, unbolt and remove the flywheel lower cover, then hold the flywheel stationary preferably using a toot which engages the flywheel starter ring gear (see Section 10). Alternatively have an assistant engage a wide-bladed screwdriver with the stader ring gear. 26 Unscrew the crankshaft sprocket retaining bolt and slide the sprocket off the end of the
^P
5.32 Tighten the crankshaft sprocket bolt to the specified torque
end of the camshaft Integral location key (arrowed)
crankshaft. The sprocket may have an integral location key on its inner face (see illustration), or a separate key which locates in a groove in the crankshaft nose may be fitted. Inspection 29 With the sprocket removed, examine the crankshaft oil seal for signs of leaking. If necessary, refer to Section 8 and renew it. 30 Check the sprocket teeth for damage. 31 Wipe clean the sprocket and crankshaft mating surfaces. Refitting 32 Slide the sprocket onto the crankshaft making sure it engages the integral key or separate key, then refit the bolt and washer and tighten the bolt to the specified torque while holding the crankshaft stationary using the method described in paragraph 27 (see illustration). 33 Refit the timing belt as described in Section 4.
6 Camshaft cover -removal and refitting
Removal 1 Remove the air cleaner assembly and inlet duct as described in Chapter 4A or 4B. 2 Progressively unscrew the mounting bolts from the top of the camshaft cover and lift off the cover • note the location of any supports on the bolts (see illustration). If it sticks, do
6.2 Removing the camshaft cover

2B»1
Chapter 2 Part B:
DOHC (16-valve) petrol
engine in-car repair procedures
Contents
Auxiliary drlvebelts - removal and refitting See Chapter 1A Camshaft oil seal - renewal 6 Camshafts and cam followers - removal, inspection and refitting .. 9 Crankshaft oil seals • renewal 7 Cylinder compression test 3 Cylinder head - dismantling and overhaul See Chapter 2D Cylinder head • removal and refitting 10 Cylinder head extension • removal and refitting 8 Engine assembly/Valve timing holes - general information and usage 2
Engine mountings - inspection and renewal 12 Engine oil and filter - renewal See Chapter 1A Engine oil level - check See Weekly checks Flywheel - removal, Inspection and refitting 11 General Information 1 Oil pump and pick-up tube - removal, inspection and refitting 14 Sump - removal and refitting 13 Timing belt and covers - removal and refitting 4 Timing belt tensioner and sprockets • removal and refitting 5
Degrees of difficulty

Easy,
sitable
for
J; Fairly
easy,
suitable Fairtydifflcutt, ^
Difficult,
aitabtefcr Very
difficult,
^ nwice
wim
(ttls for beginner with £
suitable
for competent KYmechanic ^ experienced DIY > suitable
for
expert DIY« experience
some
experience £
suitable
for competent KYmechanic ^ mechanic > or professional ^
Specifications
General Engine code* 176.09.000 •Note: See Vehicle Identification for the location of code marking on the engine. Bore 70.8 mm Stroke 78.86 mm Capacity 1242 cc Compression ratio 10.2:1 Firing order 1-3-4-2 No
1
cylinder location Timing belt end of engine Timing belt tension See text
Camshaft Orlve Toothed belt
No
of bearings 3 Camshaft bearing journal diameters: Ho
1
bearing 35.000 to 35.015 mm
Mo
2 bearing 48.000 to 48.015 mm No 3 bearing 49.000 to 49.015 mm Camshaft bearing Journal running clearance 0.030 to 0.070 mm Camshaft endfloat 0.15 to 0.34 mm
Cylinder head extension Camshaft bearing diamelers: No
1
bearing 35.045 to 35.070 mm No 2 bearing 48,045 to 48.070 mm No 3 bearing 49.045 to 49.070 mm
Cam
follower (tappet) type Hydraulic
Cam
follower (tappet) diameter 28.353 to 28.370 mm
Cam
follower (tappet) bore diameter in cylinder head extension 28.400 to 28.421 mm
Cam
follower (tappet) running clearance 0.046 to
0.051
mm

2B*6 DOHC (16-valve) petrol engine in-car repair procedures
4.24a Scrow in the camshaft locking tools into the timing holes in the cylinder head extension
locking tools Into the timing holes in the cylinder head extension. To provide the necessary degree of timing accuracy, the machined end of the locking tools are a very close fit in the slots machined in the camshafts. To allow the tools to be screwed
4.26 Slip the timing belt off the sprockets
To make a camshaft sprocket holding tool, obtain two lengths of steel strip about 6 mm thick by 30 mm wide or simitar, one 600 mm long, the other
200
mm long (all dimensions approximate). Bolt the two strips together to form a forked end, leaving the bolt slack so that the shorter sfrfp can pivot freely. At the end of each 'prong' of the fork, secure a bolt with a nut and a locknut, to act as the fulcrums; these will engage with the cut-outs In the sprocket, and should profrude by about 30 mm
4.24b The tools engage in tho camshaft slots when fitted (shown removed for clarity)
fully into engagement, it may be necessary to move the crankshaft In one direction or another very slightiy until the tools are felt to engage fully (see illustrations). 25 Release tho nut on the timing belt tensioner to release the tension on the belt (see illustration) 26 II the timing belt is to be re-used, use white paml or chalk to mark the direction of rotation on the belt (if markings do not already exist), then slip the belt off the sprockets (see illustration). Note that the crankshaft must not be rotated whilst the belt is removed. 27 Check the timing belt carefully for any signs of uneven wear, splitting, or oil contamination. Pay particular attention to the roots ol the teeth. Renew it If there is the slightest doubt about its condition. If the engine is undergoing an overhaul, renew the belt as a matter of course, regardless of its apparent condition. The cost ol a new bett is nothing compared with the cosi of repairs, should the belt break in service. If signs of oil contamination are found, trace the source of the oil leak 8nd rectify it. Wash down the engme timing belt area and all related components, to remove all traces of oil,
Refitting 28 Before refilling, thoroughly clean the liming bell sprockets. Check that Ihe tensioner pulley rotates freely, without any sign of roughness. If necessary, renew Ihe tensioner pulley as described in Section 5,
4.31 Fit the new belt around the sprockots observing the direction markings
4.25 Release the nut on the timing belt tensioner (arrowed)
29 The camshaft sprocket retaining bolt mutt; now be slackened to allow the sprocket Ic move as the timing bell Is refitted una tensioned. To hold the sprocket stationary^ while the retaining bolt is loosened, make upi. tool os follows and engage
>t
with the holes ^ i the sprocket (see Tool Tip). With the sprocket. held, slacken the retaining bolt. 30 Check that the pi6tons are still correct positioned at ihe mid-point of their stroke are that the camshafts are locked with the lockup: tools. 31 Ensuring that the direction markings on the timing belt point in the normal direction
cf
engine rotation, engage the Umlng belt vr* Ihe crankshaft sprocket first, then placed around the coolant pump sprocket and tte: camshaft sprocket (see Illustration). Rnaii>; slip the belt around the tensioner pulley. 32 Insert the jaws of a pair of right-angleo clrclip pliers (or similar) into Ihe two holes on; Ihe front face of the tensioner pulley (sec Illustration). Rotate the pulley to tension Ihj; belt until the belt Is quite taut. Maintain thr effort applied to the tensioner pulley. JM* tighten the pulley retaining nut. 33 Tighten the camshaft sprocket retains; bolt to the specified torque while holding th?; camshaft stationary using the method described previously (see Illustration). 34 Remove the piston positioning tools arc camshaft locking tools and turn In*; crankshaft through two complete turns In the normal direction of rotation,
4.32 Using right-angled clrclip pliers, turn the tensioner pulley to fully tension the bell

2B*7 DOHC (16-valve) petrol engine in-car repair procedures
35 Slacken the tensioner pulley retaining nut and reposition the tensioner to align the
mobile
indicator with the fixed reference mark
on the
pulley face (see illustration). Hold the
pdley in
this position and tighten the retaining
nut to the
specified torque. 36 Turn the crankshaft through a further two complete turns In the normal direction of rotation. Check that the timing is correct by alining Ihe piston positioning tools and
camshaft
locking tools as described previously. 37 When all is correct, remove the setting rri
locking
tools and refit the sealing plugs to 1ft© cylinder head extension, using new 0-
nr^s if
necessary. Tighten the plugs securely. 38 Refit the spark plugs as described in Chapter 1A. 39 Refit Ihe ECU and secure with Ihe mooning bolts. 40
Renew the
injector O-ring seals, smear them Kith
8 little
Vaseline then locate the injectors and tef rail onto the inlet manifold lower section.
Saute Ihe fuel rail
with the two retaining bolts. 41 Relit the inlet manifold upper section using new sealing O-rlngs If necessary and
sectre
with the two bolts. 42 Reconnect the wiring connectors for the tot injector harness and the intake air temp-erature/pressure sensor, then connect the fuel pressure regulator vacuum hose and tha
EVAP
purge valve hose. 43 Reconnect the wiring connectors for the ihrottls potentiometer, idle control stepper motor and coolant temperature sensor. Reconnect the brake servo vacuum hose. 44 Refit and adjust the accelerator cable as described in Chapter 4B. 46 Refit the upper and lower timing belt
covers
together with the TDC sensor wiring. 46 Refit the crankshaft pulley and tighten the
three
retaining bolts securely. 47 Refit the air cleaner. Inlet air duct and resonator as described in Chapter 4B. 48
Refit
tha auxiliary drivebelt(s) as described i/t Chapter 1A, then reconnect the battery
S Timing belt tensioner
and
sprockets -
removal
and refitting

Timing
belt tensioner
Removal I
Remove
the timing belt as described in
Section
4. 1 Completely unscrew the tensioner nut and Wiethe tensioner off the mounting stud-Inspection
3 Wipe
the tensioner clean but do not use Kfrents that may contaminate the bearings.
Spin
the tensioner pulley on its hub by hand.
Sfcfl
movement or excessive freeplay is an rcfceticn of severe wear: the tensioner is not 3 serviceable component, and should be nnewsd.
4.33 Holding the camshaft sprocket with the tool described previously while tightening the sprocket bolt Refitting 4 Slide the tensioner pulley over the mounting stud and fit the securing nut. 5 Refit the timing belt as described in Section 4. Camshaft sprocket Removal 6 Remove the timing belt as described in Section 4. 7 Unscrew the bolt and slide the sprocket from the end of the camshaft. Inspection 8 With the sprocket removed, examine the camshaft oil seal for signs of leaking. If necessary, refer to Section 6 and renew it. 9 Check the sprocket teeth for damage. 10 Wipe clean the sprocket and camshaft mating surfaces. Refitting 11 Locate the sprocket on the end of the camshaft, then refit the retaining boll finger tight only at this stage. 12 Refit the timing belt as described in Section 4.
Crankshaft sprocket Removal 13 Remove the timing bell as described In Section 4. 14 Working beneath the engine, unbolt and remove the flywheel lower cover, then hold the flywheel stationary preferably using a tool which engages the flywheel starter ring
<

Alternatively have an assistant engage a wide-bladed screwdriver with the starter ring gear. 15 Unscrew the crankshaft sprocket retaining bolt and slide the sprocket off the end of the crankshaft. The sprocket may have an integral location key on its inner face, or a separate key which locates In a groove in the crankshaft nose may be fitted. Inspection 16 With the sprocket removed, examine the crankshaft oil seal for signs of leaking. If necessary, refer to Section 7 and renew it. 17 Check the sprocket teeth for damage. 18 Wipe clean the sprocket and crankshaft mating surfaces. Refitting 19 Slide the sprocket onto the crankshaft making sure
11
engages the integral key or separate key, then refit the bolt and washer and tighten the bolt to the specified torque while holding the crankshaft stationary using the method described in paragraph 14. 20 Refit the timing belt as described in Section 4.
6 Camshaft
oil
seal -renewal
1 Remove the timing belt and camshaft sprocket as described in Sections 4 and 5. 2 Punch or drill a small hole in the oil seal. Screw a self-tapping screw into the hole, and pull on the screws with pliers to extract the seal. 3 Clean the seal housing, and polish off any burrs or raised edges, which may have caused the seal to fall in the first place. 4 Lubricate the lips of the new seal with clean engine oil, and drive it into position until It seats on its locating shoulder. Use a suitable tubular drift, such as a socket, which bears only on the hard outer edge of the seal. Take care nof to damage the seal lips during fitting. Note that the Seal lips should face inwards. 5 Refit the camshaft sprocket and timing belt as described in Sections 5 and 4.
7 Crankshaft oil seats -renewal I
4.35 Position the tensioner so that the mobile Indicator (1) is aligned with the fixed reference mark (2)
Front (right-hand side) oil seal 1 The front oil seal is located in the oil pump on the front of the crankshaft. Remove the timing belt as described in Section 4 and the crankshaft sprocket as described in Section 5. 2 Using a hooked Instrument, remove the oil seal from the oil pump casing taking care not to damage the surface of the crankshaft. 3 Clean the seating in the housing and the surface of the crankshaft. To prevent damage to the new oil seal as it is being fitted, wrap some adhesive tape around the end of the crankshaft and lightly oil it.

2C«1
Chapter 2 PartC:
Diesel engine in-car repair procedures
Contents
Auxiliary drivebelts - removal and refitting See Chapter 1B Camshaft cover - removal and refitting 6 Camshaft oil seal - renewal 7 Camshaft - removal and refitting See Chapter 20 Crankshaft oil seats - renewal 8 Cylinder compression test « 3 Cylinder head - dismantling and overhaul See Chapter 20 Cylinder head - removal and refitting 9 Engine mountings - inspection and renewal 11 Engine oil and fitter - renewal See Chapter 18 Engine oil level check See Weekly checks
Degrees of difficulty
Flywheel * removal, inspection and refitting 10 General information 1 Location of TDC on No 1 cylinder 2 Oil cooler - removal and refitting 14 Oil pump and pick-up tube • removal, Inspection and refitting 13 Sump • removal and refitting 12 Timing belt and covers • removal and refitting 4 Timing belt tensioner and sprockets - removal, Inspection and refitting 5 Valve clearance check and adjustment See Chapter 1B

Easy,
suitable for novice
with Irttle
|| experience g^
FaMy
eesy,
suitable ^
forbeglnnerwilti
some experience ^
Falrtydfficult, ^ suitable
for
competent DIYmechanic ^

Difficult, suitable
for & experienced DIY mechanic ^
Very
difficult,
^ suitable
for
expert
DfY
jR or professional ^
Specifications
General Engine code:' 1698 cc non-turbo engine 176.B3.000 1698 cc turbo engine: Up to 1997 t76.A3.00aor176.A5.000 1997 onward 176.A3.000or176.B7.000 •Note: See Vehicle Identification for the location of the code marking on the engine. Bore 82.6 mm Stroke 79.2 mm Compression ratio: Non-turbo engine 20.5:1 Turbo engine 19:1 Firing order 1-3-4-2
No 1
cylinder location Timing belt end of engine Titling belt tension See text
Lubrication system Oi pump type By-rotor driven from front of crankshaft Outer rotor-to-houslng clearance 0.080 to 0.186 mm Axial clearance 0.025 to 0.056 mm
Torque wrench settings Nm ibf ft Camshaft cover 10 7 Camshaft sprocket 11B 87 Crankshaft sprocket centre bolt 190 140 Cylinder head: Stage 1 50 37 Stage 2 100 74 StageS Angle-tighten a furtfier 90" Stage 4 Angle-tighten a further 90° CySnder head front bolts 30 22 Flywheel 142 105
Fuel
injection pump sprocket 49 36 Inlet and exhaust manifolds 25 18 Sump 10 7 Timing belt tensioner and idler 44 32