1989 FORD FIESTA engine

up the fuel when the feed and outlet pipe
unions are disconnected.
4On models without quick-release couplings
on the fuel lines, slowly slacken the fuel feed
pipe union allowing the pressure in the fuel
pipe to reduce. When the pressure is fully
released, disconnect the fuel feed and outlet
pipe unions.
5 On models with quick-release couplings on
the fuel lines, release the fuel feed and outlet
pipe unions from the filter, by squeezing
together the protruding locking lugs on each
union, and carefully pulling the union off the
filter stub (see illustration) . Where the unions are colour-coded, the feed and outlet pipes
cannot be confused; where both unions are
the same colour, note carefully which pipe is
connected to which filter stub, and ensure that
they are correctly reconnected on refitting.
6
Noting the arrows and/or other markings on
the filter showing the direction of fuel flow
(towards the engine), slacken the filter clamp
bolt and withdraw the filter from the car (see
illustrations) . Note that the filter will still
contain fuel; care should be taken, to avoid
spillage and to minimise the risk of fire.
7 On installation, slide the filter into its clamp
so that the arrow marked on it faces the correct way, then reconnect and tighten the
pipe unions or slide each pipe union on to its
(correct) respective filter stub, and press it
down until the locking lugs click into their
groove. Tighten the clamp bolt carefully, until
the filter is just prevented from moving; do not
overtighten, or the filter casing may be
crushed.
8
Refit the fuel pump fuse and reconnect the
battery earth terminal, then switch the ignition
on and off five times, to pressurise the
system. Check for any sign of fuel leakage
around the filter unions before lowering the
vehicle to the ground and starting the engine.
1•26Every 60 000 miles
30.6b Removing the bulkhead mounted fuel filter. Clamp bolt (arrowed)30.6a Fuel filter location below battery
showing clamp bolt (arrowed). Note fuel flow direction arrows on filter body30.5 Releasing the fuel pipe unions fromthe filter on models with quick-release couplings
1595Ford Fiesta Remake
Every 3 years
31 Brake fluid renewal
3
The procedure is similar to that for the
bleeding of the hydraulic system as described
in Chapter 9, except that the brake fluid
reservoir should be emptied by syphoning,
and allowance should be made for the old
fluid to be removed from the circuit when
bleeding a section of the circuit.
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2A
1595Ford Fiesta Remake
General
Engine type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . . . . . . . Four-cylinder, in-line overhead valve
Engine code:1.0 litre carburettor models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TLB
1.1 litre carburettor models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . GUE or GUD
1.1 litre CFi fuel injection models . . . . . . . . . . . . . . . . . . . . . . . . . . . . G6A
1.3 litre carburettor models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . JBC
1.3 litre CFi fuel injection models . . . . . . . . . . . . . . . . . . . . . . . . . . . . J6B
Capacity: 1.0 litre models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . . 999 cc
1.1 litre models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . . 1118 cc
1.3 litre models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . . 1297 cc
Bore:
1.0 and 1.1 litre models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68.68 mm
1.3 litre models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . . 73.96 mm
Stroke:
1.0 litre models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . . 67.40 mm
1.1 and 1.3 litre models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75.48 mm
Compression ratio:
Carburettor models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . 9.5:1
CFi fuel injection models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.8:1
Firing order . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . . . . . . . 1-2-4-3 (No 1 cylinder at timing chain end)
Direction of crankshaft rotation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Clockwise (seen from right-hand side of vehicle)
Valves
Valve clearance (cold): Inlet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . . . . . . . . . . . 0.20 mm
Exhaust . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . . . . . . . . 0.30 mm
Chapter 2 Part A:
HCS engine in-car repair procedures
Auxiliary drivebelt check and renewal . . . . . . . . . . . . . . .See Chapter 1
Compression test - description and interpretation . . . . . . . . . . . . . . 2
Crankshaft oil seals - renewal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Crankshaft pulley - removal and refitting . . . . . . . . . . . . . . . . . . . . . 8
Cylinder head - removal and refitting . . . . . . . . . . . . . . . . . . . . . . . . 7
Cylinder head rocker cover - removal and refitting . . . . . . . . . . . . . . 4
Cylinder head rocker gear - removal, inspection and refitting . . . . . 6
Engine oil and filter renewal . . . . . . . . . . . . . . . . . . . . . . .See Chapter 1
Engine oil level check . . . . . . . . . . . . . . . . . . . . . .See
“Weekly Checks”
Engine/transmission mountings - inspection and renewal . . . . . . . . 15 Flywheel - removal, inspection and refitting . . . . . . . . . . . . . . . . . . . 16
General information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . 1
Oil pump - dismantling, inspection and reassembly . . . . . . . . . . . . . 13
Oil pump - removal and refitting . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Sump - removal and refitting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Timing chain cover - removal and refitting . . . . . . . . . . . . . . . . . . . . 9
Timing chain, sprockets and tensioner - removal, inspection
and refitting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . . 10
Top Dead Centre (TDC) for No 1 piston - locating . . . . . . . . . . . . . . 3
Valve clearances - checking and adjustment . . . . . . . . . . . . . . . . . . 5
2A•1
Specifications Contents
Easy, suitable for
novice with little
experience Fairly easy,
suitable
for beginner with
some experience Fairly difficult,
suitable for competent
DIY mechanic
Difficult,
suitable for
experienced DIY
mechanic Very difficult,
suitable for expert DIY
or professional
Degrees of difficulty
54321
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Lubrication
Engine oil type/specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See “Lubricants, fluids and tyre pressures”
Engine oil capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . See “Lubricants, fluids and tyre pressures”
Oil pressure: At idle speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . . . . 0.60 barsAt 2000 rpm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . . . . 1.50 bars
Oil pump clearances: Outer rotor-to-body . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . 0.14 to 0.26 mm
Inner rotor-to-outer rotor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.051 to 0.127 mm
Rotor endfloat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . . . 0.025 to 0.06 mm
Torque wrench settingsNm lbf ft
Camshaft thrust plate bolts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4
Camshaft sprocket bolt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. 1813
Crankshaft pulley bolt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . 115 85
Rocker shaft pedestal bolts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4332
Flywheel bolts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . . . . . 6749
Sump: Stage 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . . . . . . . . 7 5
Stage 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . . . . . . . . 9 7
Stage 3 (with engine warm) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 7
Oil pressure switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . 1410
Cylinder head bolts (may be re-used once only): Stage 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . . . . . . . . 3022
Stage 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . . . . . . . . Angle-tighten a further 90º
Stage 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . . . . . . . . Angle-tighten a further 90º
Timing chain tensioner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . 8 6
Timing chain cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . 9 7
Crankshaft rear oil seal housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1813
Rocker cover bolts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . 5 4
Oil pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . . . . . . . . . 1813
Oil pump cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . . . . 9 7
Engine mountings: Engine mounting (right-hand):Bolt to body (in wheel arch) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 to 58 30 to 43
Nut to body (by suspension strut) . . . . . . . . . . . . . . . . . . . . . . . . . . 41 to 58 30 to 43
Bracket to cylinder block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 to 72 40 to 53
Rubber insulator to bracket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71 to 95 52 to 70
Transmission mounting fasteners . . . . . . . . . . . . . . . . . . . . . . . . . . . . Refer to Chapter 7A or 7B
Note: Refer to Part D of this Chapter for remaining torque wrench settings.
2A•2 HCS engine in-car repair procedures
1595Ford Fiesta Remake
1 General information
How to use this Chapter
This Part of Chapter 2 is devoted to repair
procedures possible while the engine is still
installed in the vehicle, and includes only the
Specifications relevant to those procedures.
Similar information concerning the 1.4 and
1.6 litre CVH and PTE engines, and the 1.6
and 1.8 litre Zetec engines, will be found in
Parts B and C of this Chapter respectively.
Since these procedures are based on the
assumption that the engine is installed in the
vehicle, if the engine has been removed from
the vehicle and mounted on a stand, some
of the preliminary dismantling steps outlined
will not apply. Information concerning engine/transmission
removal and refitting, and engine overhaul, can
be found in Part D of this Chapter, which also
includes the Specifications relevant to those
procedures.
Engine description
The engine is an overhead valve, water-
cooled, four cylinder in-line design,
designated HCS (High Compression Swirl).
The engine is mounted transversely at the
front of the vehicle together with the
transmission to form a combined power unit. The crankshaft is supported in three or five
shell-type main bearings. The connecting rod
big-end bearings are also split shell-type, and
are attached to the pistons by interference-fit
gudgeon pins. Each piston is fitted with two
compression rings and one oil control ring. The camshaft, which runs on bearings
within the cylinder block, is chain-driven from
the crankshaft, and operates the valves via
pushrods and rocker arms. The valves are
each closed by a single valve spring, and
operate in guides integral in the cylinder head. The oil pump is mounted externally on the
crankcase, incorporates a full-flow oil filter,
and is driven by a skew gear on the camshaft.
On carburettor versions, the fuel pump is also
driven from the camshaft, via an eccentric
lobe.
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) Cylinder head rocker cover - removal
and refitting.
c) Valve clearances - adjustment.
d) Rocker shaft assembly - removal,
inspection and refitting.
e) Cylinder head - removal and refitting
f) Cylinder head and pistons - decarbonising.
g) Crankshaft pulley - removal and refitting.
h) Crankshaft oil seals - renewal.
i) Timing chain, sprockets and tensioner -
removal, inspection and refitting.
j) Oil filter renewal.
k) Oil pump - removal and refitting.
l) Sump - removal and refitting.
m) Flywheel - removal, inspection and
refitting.
n) Engine/transmission mountings -
inspection and renewal.
Note: It is possible to remove the pistons and
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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 Compression test-
description and interpretation
2
1 When engine performance is down, or if
misfiring occurs which cannot be attributed to
the ignition or fuel systems, a compression
test can provide diagnostic clues as to the
engine’s condition. If the test is performed
regularly, it can give warning of trouble before
any other symptoms become apparent.
2 The engine must be fully warmed-up to
normal operating temperature, the oil level
must be correct and the battery must be fully
charged. The aid of an assistant will also be
required.
3 On fuel injection engines, refer to Chap-
ter 12 and remove the fuel pump fuse from the
fusebox. Now start the engine and allow it to
run until it stalls.
4 Disable the ignition system by
disconnecting the multi-plug from the DIS or
E-DIS ignition coil. Remove all the spark plugs
with reference to Chapter 1 if necessary.
5 Fit a compression tester to the No 1
cylinder spark plug hole - the type of tester
which screws into the plug thread is to be
preferred.
6 Arrange for an assistant to hold the
accelerator pedal fully depressed to the floor,
while at the same time cranking the engine
over for several seconds on the starter motor.
Observe the compression gauge reading. The
compression will build up fairly quickly in a
healthy engine. Low compression on the first
stroke, followed by gradually-increasing
pressure on successive strokes, indicates
worn piston rings. A low compression on the
first stroke which does not rise on successive
strokes, indicates leaking valves or a blown
head gasket (a cracked cylinder head could
also be the cause). Deposits on the underside
of the valve heads can also cause low
compression. Record the highest gauge
reading obtained, then repeat the procedure
for the remaining cylinders.
7 Due to the variety of testers available, and
the fluctuation in starter motor speed when
cranking the engine, different readings
are often obtained when carrying out
the compression test. For this reason, actual
compression pressure figures are not quoted
by Ford. However, the most important factor
is that the compression pressures are uniform
in all cylinders, and that is what this test is
mainly concerned with.
8 Add some engine oil (about three squirts
from a plunger type oil can) to each cylinder
through the spark plug holes, and then repeat
the test. 9
If the compression increases after the oil is
added, it is indicative that the piston rings are
definitely worn. If the compression does not
increase significantly, the leakage is occurring
at the valves or the head gasket. Leakage
past the valves may be caused by burned
valve seats and/or faces, or warped, cracked
or bent valves.
10 If two adjacent cylinders have equally low
compressions, it is most likely that the head
gasket has blown between them. The
appearance of coolant in the combustion
chambers or on the engine oil dipstick would
verify this condition.
11 If one cylinder is about 20 percent lower
than the other, and the engine has a slightly
rough idle, a worn lobe on the camshaft could
be the cause.
12 On completion of the checks, refit the
spark plugs and reconnect the HT leads and
the ignition coil plug. Refit the fuel pump fuse
to the fusebox.
3 Top Dead Centre (TDC) for No 1 piston - locating
2
1Top dead centre (TDC) is the highest point
of the cylinder that each piston reaches as the
crankshaft turns. Each piston reaches its TDC
position at the end of its compression stroke,
and then again at the end of its exhaust
stroke. For the purpose of engine timing, TDC
at the end of the compression stroke for No 1
piston is used. On the HCS engine, No 1
cylinder is at the crankshaft pulley/timing
chain end of the engine. Proceed as follows.
2 Ensure that the ignition is switched off.
Disconnect the HT leads from the spark plugs,
then unscrew and remove the plugs as
described in Chapter 1.
3 Turn the engine over by hand (using a
spanner on the crankshaft pulley) to the point
where the timing mark on the crankshaft
pulley aligns with the TDC (0) mark or TDC
reference pointer on the timing cover (see
illustration) . As the pulley mark nears the
timing mark, the No 1 piston is simultaneously
approaching the top of its cylinder. To ensure
that it is on its compression stroke, place a
finger over the No 1 cylinder plug hole, and feel to ensure that air pressure exits from the
cylinder as the piston reaches the top of its
stroke.
4
A further check to ensure that the piston is
on its compression stroke can be made by
first removing the air cleaner (refer to the
relevant Part of Chapter 4), then unbolting and
removing the rocker cover, so that the
movement of the valves and rockers can be
observed.
5 With the TDC timing marks on the
crankshaft pulley and timing cover in
alignment, rock the crankshaft back and forth
a few degrees each side of this position, and
observe the action of the valves and rockers
for No 1 cylinder. When No 1 piston is at the
TDC firing position, the inlet and exhaust valve
of No 1 cylinder will be fully closed, but the
corresponding valves of No 4 cylinder will be
seen to rock open and closed.
6 If the inlet and exhaust valves of No 1
cylinder are seen to rock whilst those of
No 4 cylinder are shut, the crankshaft will
need to be turned one full rotation to bring
No 1 piston up to the top of its cylinder on the
compression stroke.
7 Once No 1 cylinder has been positioned at
TDC on the compression stroke, TDC for any
of the other cylinders can then be located by
rotating the crankshaft clockwise (in its
normal direction of rotation), 180º at a time,
and following the firing order (see
Specifications).
4 Cylinder head rocker cover -
removal and refitting
1
Removal
1 Where necessary for access, remove the air
cleaner as described in the relevant Part of
Chapter 4.
2 Detach the HT leads from the spark plugs.
Pull on the connector of each lead (not the
lead itself), and note the order of fitting.
3 Remove the engine oil filler cap and
breather hose (where fitted).
4 Unscrew the four retaining bolts, and lift the
rocker cover clear of the cylinder head.
Remove the gasket.
HCS engine in-car repair procedures 2A•3
3.3 Timing mark on the crankshaft pulley aligned with the TDC (0) mar\
k on the timing cover
2A
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Refitting
5Thoroughly clean the rocker cover, and
scrape away any traces of old gasket
remaining on the cover and cylinder head
mating surfaces.
6 Fit a new gasket to the rocker cover, then
refit the rocker cover (see illustrations).
Tighten the cover retaining bolts to the
specified torque wrench setting, in a diagonal
sequence.
7 Reconnect the HT leads, and refit the air
cleaner as described in Chapter 4.
5 Valve clearances -
checking and adjustment
2
Note: The valve clearances must be checked
and adjusted only when the engine is cold.
1 The importance of having the valve
clearances correctly adjusted cannot be
overstressed, as they vitally affect the
performance of the engine. If the clearances
are too big, the engine will be noisy
(characteristic rattling or tapping noises) and
engine efficiency will be reduced, as the
valves open too late and close too early. A
more serious problem arises if the clearances
are too small, however. If this is the case, the
valves may not close fully when the engine is
hot, resulting in serious damage to the engine
(eg. burnt valve seats and/or cylinder head
warping/cracking). The clearances are
checked and adjusted as follows.
2 Set the engine to TDC for No 1 piston, as
described in Section 3.
3 Remove the rocker cover as described in
Section 4.
4 Starting from the thermostat end of the
cylinder head, the valves are numbered as
follows: Valve No Cylinder No
1 - Exhaust 1
2 - Inlet 1
3 - Exhaust 2
4 - Inlet 2
5 - Inlet 3
6 - Exhaust 3
7 - Inlet 4
8 - Exhaust 4 5
Adjust the valve clearances following the
sequence given in the following table. Turn
the crankshaft pulley 180º (half a turn) after
adjusting each pair of valve clearances.
Valves “rocking” Valves to adjust
7 and 8 1 (exhaust), 2 (inlet)
5 and 6 3 (exhaust), 4 (inlet)
1 and 2 8 (exhaust), 7 (inlet)
3 and 4 6 (exhaust), 5 (inlet)
6 The clearances for the inlet and exhaust
valves differ (refer to the Specifications). Use a
feeler gauge of the appropriate thickness to
check each clearance between the end of the
valve stem and the rocker arm (see
illustration) . The gauge should be a firm
sliding fit between the valve and rocker arm.
Where adjustment is necessary, turn the
adjuster bolt as required with a ring spanner
to set the clearance to that specified. The
adjuster bolts are of stiff-thread type, and
require no locking nut.
7 On completion, refit the rocker cover as
described in Section 4.
6 Cylinder head rocker gear -
removal, inspection and
refitting
2
Removal
1 Remove the rocker cover as described in
Section 4.
2 Unscrew the four retaining bolts, and lift the
rocker gear assembly from the cylinder head.
As the assembly is withdrawn, ensure that the
pushrods remain seated in their positions in
the engine.
Inspection
3 To dismantle the rocker shaft assembly,
extract the split pin from one end of the shaft,
then withdraw the spring and plain washers
from the shaft.
4 Slide off the rocker arms, the support
pedestals and coil springs from the shaft, but take care to keep them in their original order
of fitting
(see illustration) .
5 Clean the respective components, and
inspect them for signs of excessive wear or
damage. Check that the oil lubrication holes in
the shaft are clear.
6 Check the rocker shaft and arm pads which
bear on the valve stem end faces for wear and
scoring, and check each rocker arm on the
shaft for excessive wear. Renew any
components as necessary.
Refitting
7 Apply clean engine oil to the rocker shaft
prior to reassembling.
2A•4 HCS engine in-car repair procedures
6.4 Rocker shaft partially dismantled for inspection
5.6 Adjusting the valve clearances4.6b Refitting the rocker cover4.6a Engage tags of rocker cover gasketinto the cut-outs in the cover
1595Ford Fiesta Remake
Turning the engine will be
easier if the spark plugs are
removed first - see Chapter 1.
If the pushrods are to be removed,
keep them in the correct order of fitting
by labelling them 1 to 8, starting from
the thermostat end of the cylinder
head, or locate them in a card.
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8Reassemble in the reverse order of
dismantling. Make sure that the “flat” on the
rear end of the rocker shaft is to the same side
as the rocker arm adjusting screws (closest to
the thermostat end of the cylinder head when
fitted) (see illustration) . This is essential for
the correct lubrication of the cylinder head
components.
9 Refit the rocker shaft assembly. As it is
fitted, ensure that the rocker adjuster screws
engage with their corresponding pushrods.
10 Refit the rocker shaft retaining bolts,
hand-tighten them and then tighten them to
the specified torque wrench setting. As they
are tightened, some of the rocker arms will
apply pressure to the ends of the valve stems,
and some of the rocker pedestals will not
initially be in contact with the cylinder head -
these should pull down as the bolts are
tightened to their specified torque. If for any
reason they do not, avoid the temptation to
overtighten in order to pull them into position;
loosen off the bolts, and check the cause of
the problem. It may be that the rocker adjuster
screws require loosening off in order to allow
the assembly to be tightened down as
required.
11 Adjust the valve clearances as described
in Section 5.
7 Cylinder head -
removal and refitting
3
Removal
Note: The following procedure describes
removal and refitting of the cylinder head
complete with inlet and exhaust manifolds. If
wished, the manifolds may be removed first,
as described in the relevant Part of Chapter 4,
and the cylinder head then removed on its
own.
1 On fuel injection engines, depressurise the
fuel system as described in Chapter 4, Part B.
2 Disconnect the battery negative (earth) lead
(refer to Chapter 5A, Section 1).
3 Refer to Chapter 4A or 4B as applicable
and remove the air cleaner.
4 Refer to Section 4 and remove the rocker
cover. 5
Refer to Chapter 1 and drain the cooling
system.
6 Disconnect the hoses from the thermostat
housing.
7 Disconnect the heater (coolant) hoses from
the inlet manifold and CFi unit, where
applicable.
8 Disconnect the accelerator and choke
cables as applicable (see Chapter 4A or 4B).
9 Disconnect the vacuum and breather hoses
from the carburettor/CFi unit, and inlet
manifold as applicable.
10 Disconnect the fuel feed and return lines
at the carburettor, or at the quick-release
couplings, then unclip the fuel hoses from the
inlet manifold; use rag to soak up any spilt
fuel.
11 Disconnect the HT leads from the spark
plugs and the support bracket. Unscrew and
remove the spark plugs.
12 Disconnect the electrical leads from the
temperature gauge sender, radiator cooling
fan, the engine coolant temperature sender,
and the anti-run-on (anti-dieselling) valve at
the carburettor.
13 Disconnect the remaining wiring multi-
plugs from the engine sensors at the inlet
manifold and from the oxygen sensor (where
fitted) in the exhaust manifold or downpipe.
14 On vehicles equipped with a pulse-air
system, remove the pulse-air piping and filter
assembly as described in Chapter 4E.
15 Chock the rear wheels then jack up the
front of the car and support it on axle stands
(see “Jacking and Vehicle Support” ).
16 Undo the retaining nuts and bolts, and
disconnect the exhaust downpipe from the
manifold. Remove the flange gasket. (Note
that both the gasket and the joint self-locking
nuts must be renewed.) To prevent the
exhaust system from being strained, tie the
downpipe up using strong wire or a length of
cord to support it. Lower the vehicle.
17 Undo the four retaining bolts and lift clear
the rocker gear assembly from the cylinder
head.
18 Lift out the pushrods. Keep them in order
of fitting by labelling them 1 to 8, starting from
the thermostat end of the cylinder head.
Alternatively, push them through a piece of
card in their fitted sequence.
19 Progressively unscrew and loosen off the
cylinder head retaining bolts in the reverse
sequence to that shown for tightening (see
illustration 7.27a). When they are all loosened off, remove the bolts, then lift the
cylinder head clear and remove the gasket. If
it is stuck, tap it upwards using a hammer and
block of wood. Do not try to turn it, as it is
located by dowels; make no attempt
whatsoever to prise it free using a screwdriver
inserted between the block and head faces.
The gasket must always be renewed; it should
be noted that the cylinder head retaining bolts
may be re-used, but only once. They should
be marked accordingly with a punch or paint
mark. If there is any doubt as to how many
times the bolts have been used, they must be
renewed.
20
To dismantle/overhaul the cylinder head,
refer to Part D of this Chapter. It is normal for
the cylinder head to be decarbonised and the
valves to be reground whenever the head is
removed.
Preparation for refitting
21 The mating faces of the cylinder head and
cylinder block must be perfectly clean before
refitting the head. Use a hard plastic or wood
scraper to remove all traces of gasket and
carbon; also clean the piston crowns. Take
particular care during the cleaning operations,
as aluminium alloy is easily damaged. Also,
make sure that the carbon is not allowed to
enter the oil and water passages - this is
particularly important for the lubrication
system, as carbon could block the oil supply
to the engine’s components. Using adhesive
tape and paper, seal the water, oil and bolt
holes in the cylinder block.
22 Check the mating surfaces of the cylinder
block and the cylinder head for nicks, deep
scratches and other damage. If slight, they
may be removed carefully with a file, but if
excessive, machining may be the only
alternative to renewal.
23 If warpage of the cylinder head gasket
surface is suspected, use a straight-edge to
check it for distortion. Refer to Part D of this
Chapter if necessary.
24 Clean the threads of the cylinder head
bolts or fit new ones (as applicable) and clean
out the bolt holes in the block. Screwing a bolt
into an oil-filled hole can (in extreme cases)
cause the block to fracture, due to the
hydraulic pressure.
Refitting
25 Check that the new cylinder head gasket
is the same type as the original, and that the
“TOP” (or “OBEN”) marking is facing
upwards. Locate the new cylinder head
HCS engine in-car repair procedures 2A•5
6.8 Flat on the rocker shaft (arrowed) to
same side as rocker arm adjusting screws
2A
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Whenever you disconnect
any vacuum lines, coolant or
emissions hoses, wiring
connectors and fuel lines,
always label them clearly, so that they
can be correctly reassembled. Masking
tape and/or a touch-up paint applicator
work well for marking items. Take
instant photos, or sketch the locations
of components and brackets.
To prevent carbon entering
the gap between the pistons
and bores, smear a little
grease in the gap. After
cleaning each piston, use a small brush
to remove all traces of grease and
carbon from the gap, then wipe away
the remainder with a clean rag.
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gasket onto the top face of the cylinder block
and over the dowels. Ensure that it is correctly
aligned with the coolant passages and
oilways (see illustration) .
26 Lower the cylinder head carefully into
position, then insert the retaining bolts and
hand-tighten them.
27 Tightening of the cylinder head bolts must
done in three stages, and in the correct
sequence (see illustration) . First tighten all of
the bolts in the sequence shown to the
Stage 1 torque setting (see illustration).
When all of the bolts are tightened to the
Stage 1 setting, further tighten each bolt (in
sequence) through the Stage 2 specified
angle of rotation. When the second stage
tightening is completed on all of the bolts,
further tighten them to the Stage 3 angle
setting (in sequence) to complete. Where
possible, use an angular torque setting gauge
attachment tool for accurate tightening of
stages two and three (see illustration).
28 Lubricate the pushrods with clean engine
oil, and then insert them into their original
locations in the engine.
29 Refit the rocker shaft assembly. As it is
fitted, ensure that the rocker adjuster screws
engage with their corresponding pushrods.
30 Refit the rocker shaft retaining bolts,
hand-tighten them and then tighten them
to the specified torque wrench setting. As
they are tightened, some of the rocker arms
will apply pressure to the ends of the valve
stems, and some of the rocker pedestals will
not initially be in contact with the cylinder head - these should pull down as the bolts are
tightened. If for any reason they do not, avoid
the temptation to overtighten in order to pull
them into position; loosen off the bolts, and
check the cause of the problem. It may be
that the rocker adjuster screws require
loosening off in order to allow the assembly to
be tightened down as required.
31
Adjust the valve clearances as described
in Section 5.
32 Refit the rocker cover as described in
Section 4.
33 The remainder of the refitting procedure is
a reversal of the removal process. Tighten all
fastenings to their specified torque setting
(where given). Refer to the appropriate Parts
of Chapter 4 for details on reconnecting the
fuel and exhaust system components. Ensure
that all coolant, fuel, vacuum and electrical
connections are securely made.
34 On completion, refill the cooling system
and top-up the engine oil (see Chapter 1 and
“Weekly Checks” ). When the engine is
restarted, check for any sign of fuel, oil and/or
coolant leakages from the various cylinder
head joints.
8 Crankshaft pulley -
removal and refitting
2
Removal
1 Disconnect the battery negative (earth) lead
(refer to Chapter 5A, Section 1).
2 Chock the rear wheels then jack up the
front of the car and support it on axle stands
(see “Jacking and Vehicle Support” ). Remove
the right-hand front roadwheel.
3 Remove the auxiliary drivebelt as described
in Chapter 1.
4 Loosen off the crankshaft pulley retaining
bolt. To prevent the crankshaft from turning,
unbolt and remove the clutch housing cover
plate. Lock the starter ring gear on the
flywheel using a large screwdriver or similar
tool inserted through the cover plate aperture.
Alternatively, remove the starter motor
(Chapter 5A) and lock the ring gear through
the starter motor aperture. 5
Fully unscrew the crankshaft pulley bolt,
and withdraw the pulley from the front end of
the crankshaft. If it does not pull off by hand,
lever it free using a pair of suitable levers
positioned diagonally opposite each other
behind the pulley.
6 If required, the crankshaft front oil seal can
be renewed at this stage, as described in
Section 14.
Refitting
7 Refitting is a reversal of the removal
procedure ensuring that the pulley retaining
bolt is tightened to the specified torque
setting.
8 Refit the auxiliary drivebelt as described in
Chapter 1, and lower the vehicle to complete.
9 Timing chain cover -
removal and refitting
2
Removal
1 Remove the sump as described in Sec-
tion 11.
2 Remove the crankshaft pulley as described
in the previous Section.
3 A combined timing cover and water pump
gasket is fitted during production; if this is still
in position, it will be necessary to drain the
cooling system and remove the water pump
as described in Chapter 3. If the water pump
and/or the timing cover have been removed at
any time, the single gasket used originally will
have been replaced by an individual gasket
for each component, in which case the water
pump can remain in position.
4 Unscrew the retaining bolts, and carefully
prise free the timing chain cover.
5 Clean the mating faces of the timing chain
cover, and the engine.
6 If necessary, renew the crankshaft front oil
seal in the timing cover prior to refitting the
cover (see Section 14).
Refitting
7 Lightly lubricate the front end of the
crankshaft and the radial lip of the timing
chain cover oil seal (already installed in the
2A•6 HCS engine in-car repair procedures
7.27c Cylinder head bolt tightening
(Stages 2 and 3) using an angle gauge
7.27b Tightening the cylinder head bolts (Stage 1)7.27a Cylinder head bolt tighteningsequence7.25 Cylinder head gasket top-facemarking (“OBEN”)
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cover). Using a new gasket, fit the timing
chain cover, centring it with the aid of the
crankshaft pulley - lubricate the seal contact
surfaces beforehand. Refit and tighten the
retaining bolts but, where applicable, leave
out the timing cover bolt which also secures
the water pump at this stage.
8Where applicable, refit the water pump as
described in Chapter 3.
9 Refit the crankshaft pulley as described in
the previous Section.
10 Refit the sump as described in Section 11.
10Timing chain, sprockets and
tensioner - removal,
inspection and refitting
3
Removal
1 Remove the timing chain cover as
described in the previous Section.
2 Remove the oil slinger from the front face of
the crankshaft, noting its orientation (see
illustration) .
3 Retract the chain tensioner cam back
against its spring pressure, then slide the
chain tensioner arm from its pivot pin on the
front main bearing cap (see illustration).
4 Unbolt and remove the chain tensioner.
5 Bend back the lockplate tabs from the
camshaft sprocket bolts, then unscrew and
remove the bolts.
6 Withdraw the sprocket complete with the
timing chain.
Inspection
7 Examine the teeth on the timing sprockets
for any signs of excessive wear or damage.
8 The timing chain should always be renewed
during a major engine overhaul. Slack links
and pins are indicative of a worn chain.
Unless the chain is known to be relatively
new, it should be renewed.
9 Examine the rubber cushion on the
tensioner spring leaf. If grooved or
deteriorated, it must be renewed.
Refitting
10 Commence reassembly by bolting the
timing chain tensioner into position. Check
that the face of the tensioner cam is parallel
with the face of the cylinder block, ideally
using a dial gauge. The maximum permissible
error between the two measuring points is
0.2 mm. Release and turn the timing chain
tensioner as required to achieve this (if
necessary). Refer to the Specifications for the
correct tightening torque.
11 Turn the crankshaft so that the timing
mark on its sprocket is directly in line with the
centre of the camshaft sprocket mounting
flange.
12 Engage the camshaft sprocket with the
timing chain, then engage the chain around
the teeth of the crankshaft sprocket. Push the
camshaft sprocket onto its mounting flange,
and check that the sprocket retaining bolt
holes are in alignment (see illustration). Alsocheck that the timing marks of both sprockets
face each other. If required, turn the
camshaft/sprocket as required to achieve this.
It may also be necessary to remove the
camshaft from the chain in order to reposition
it in the required location in the chain to align
the timing marks. This is a “trial and error”
procedure, which must be continued until the
exact alignment of the bolt holes and the
timing marks is made
(see illustration).
13 Insert and tighten the camshaft sprocket
retaining bolts to the specified torque wrench
setting. Bend up the tabs of the new lockplate
to secure (see illustration) .
14 Retract the timing chain tensioner cam,
and then slide the tensioner arm onto its pivot
pin. Release the cam so that it bears on the
arm.
15 Refit the oil slinger to the front of the
crankshaft sprocket so that its convex side
faces the sprocket.
16 Refit the timing chain cover as described
in the previous Section.
11 Sump -
removal and refitting
2
Removal
1 Disconnect the battery negative (earth) lead
(refer to Chapter 5A, Section 1).
2 Refer Chapter 1 and drain the engine oil.
Refit the sump drain plug.
3 Undo the retaining nuts and detach the
exhaust downpipe from the manifold flange.
Note that the flange gasket should be
renewed on reassembly. Allowing sufficient
clearance for sump removal, tie the exhaust
downpipe up with a suitable length of wire or
cord to prevent the system straining the
insulators. On catalytic converter-equipped
vehicles, avoid straining the oxygen sensor
wiring; if necessary, disconnect the sensor’s
multi-plug.
4 Remove the starter motor (see Chapter 5A).
5 Undo the two retaining bolts and remove
the clutch housing cover plate and, where
fitted, the auxiliary drivebelt lower cover from
inside the right-hand wheel arch.
HCS engine in-car repair procedures 2A•7
10.12a Fit the timing chain to the
crankshaft and camshaft sprockets . . .
10.3 Chain tensioner arm removal from the pivot pin. Note tensioner retaining bolts (arrowed)10.2 Oil slinger removal from crankshaft
10.13 Bend locktabs against the camshaftretaining bolt heads to secure10.12b . . . and check that the timing
marks on the sprockets are in alignment
2A
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