1989 FORD FIESTA ignition

Ignition system
Firing order:HCS engines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . . . . 1-2-4-3 (No 1 cylinder at timing chain end of engine)
All other engines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . 1-3-4-2 (No 1 cylinder at timing belt end of engine)
Spark plugs*:
HCS engines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . . . . Champion RS9YCC or RS9YC
1.4 and 1.6 litre CVH (carburettor) engines . . . . . . . . . . . . . . . . . . . . Champion RC7YCC or RC7YC
1.6 litre CVH (EFi fuel injection) and PTE engines Non-turbo models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . Champion RC7YCC4 or RC7YC4
Turbo models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . Champion C61YC
1.6 and 1.8 litre Zetec engines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Champion RE7YCC
Electrode gap*:
HCS engines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . . . . 1.0 mm
1.4 litre CVH (carburettor) engines . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.8 mm
1.4 litre CVH (CFi fuel injection) and PTE engine . . . . . . . . . . . . . . . . 1.0 mm
1.6 litre CVH (carburettor) engines: With Champion RC7YCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.8 mmWith Champion RC7YC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.7 mm
1.6 litre CVH (EFi fuel injection) engines: Non-turbo models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . 1.0 mm
Turbo models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . 0.7 mm
1.6 and 1.8 litre Zetec engines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.3 mm
Spark plug (HT) leads: HCS engines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . . . . Champion LS-28
1.4 and 1.6 litre CVH (carburettor) engines . . . . . . . . . . . . . . . . . . . . Champion LS-14
1.4 litre CVH (CFi fuel injection) and PTE engines . . . . . . . . . . . . . . . Champion LS-14
1.6 litre CVH (EFi fuel injection) engines . . . . . . . . . . . . . . . . . . . . . . . Champion LS-26
1.6 and 1.8 litre Zetec engines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Champion type not available
Maximum resistance per lead . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 000 ohms * Information on spark plug types and electrode gaps is as recommended b\
y Champion Spark Plug. Where alternative types are used, refer to their
manufacturer’s recommendations.
Braking system
Minimum front brake pad lining thickness . . . . . . . . . . . . . . . . . . . . . . . 1.5 mm
Minimum rear brake shoe lining thickness . . . . . . . . . . . . . . . . . . . . . . . 1.0 mm
Tyres
Tyre pressures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . . . . See “Weekly Checks”
Wiper blades
Windscreen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . . . . . . . Champion X-4803Tailgate/rear window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . Champion X-4103
Torque wrench settingsNm lbf ft
Auxiliary drivebelt cover fasteners . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 6
Auxiliary drivebelt adjustment: Adjusting bolt (sliding arm) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2216
Central (locking) bolt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . 2216
Pinion (adjuster) nut . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . 129
Alternator mounting bolts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2418
Tensioner pulley centre bolt (HCS engines) . . . . . . . . . . . . . . . . . . . . 2015
Engine oil drain plug . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . 2418
Manual transmission filler/level plug . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2015
Spark plugs: HCS engines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . . . . 1813
CVH and PTE engines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
2418
Zetec engines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . . . 1511
Roadwheel nuts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . . . 71 to 100 52 to 74
Servicing Specifications1•3
1
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Maintenance – component location1•5
1 Engine oil filler cap
2 Engine oil level dipstick
3 Cooling system expansion tank
4 Brake fluid reservoir
5 Windscreen/tailgate washer fluid reservoircap
6 Battery
7 Vehicle identification plate
8 Thermostat housing
9 Pre-heat tube
10 Timing belt cover
11 Distributor
12 Fuel filter
13 Heater blower motor cover
14 Windscreen wiper motor mounting bracket
15 Jack and wheelbrace retaining bolt
16 Top of suspension strut mounting
assembly
17 EEC IV engine management module cover
18 CFi unit
19 Fuel injector
20 Fuel pressure regulator
21 Throttle plate control motor
22 Carbon canister
23 Manifold absolute pressure sensor
24 Ignition module
1.1 litre HCS carburettor engine (air cleaner removed for clarity)
1
1595Ford Fiesta Remake
1.4 litre CVH CFi fuel injection engine (air cleaner removed for clarity)
1 Engine oil filler cap
2 Engine oil level dipstick
3 Cooling system expansion tank
4 Brake fluid reservoir
5 Windscreen/tailgate washer fluid reservoir
cap
6 Battery
7 Vehicle identification plate
8 Thermostat housing
9 Radiator cooling fan thermal switch multi- plug
10 Alternator
11 Starter motor solenoid
12 CTX automatic transmission fluid level
dipstick
13 Exhaust heatshield/airbox
14 Brake pressure control valves
15 Top of suspension strut mounting
assembly
16 Carburettor
17 Fuel feed hose
18 Anti-dieselling (fuel-cut off) solenoid
connection
19 Throttle kicker
20 Throttle kicker control solenoid
21 Ignition module
22 Heater blower motor cover
23 Windscreen wiper motor mounting bracket
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1•6Maintenance – component location
1.6 litre (XR2i) CVH EFi fuel injection engine
1595Ford Fiesta Remake1 Engine oil filler cap
2 Engine oil level dipstick
3 Cooling system expansion tank
4 Brake fluid reservoir
5 Windscreen/tailgate washer fluid reservoir
cap
6 Battery
7 Vehicle identification plate
8 Thermostat housing
9 Timing belt cover
10 Top of suspension strut mounting
assembly
11 Windscreen wiper motor mounting bracket
12 Jack and wheelbrace retaining bolt
13 Distributorless (E-DIS) ignition coil
14 Fuel filter
15 Air cleaner
16 Air inlet duct
17 Idle speed control valve
18 Fuel pressure regulator
19 Throttle housing
20 Upper section of inlet manifold
21 Intake air temperature sensor
22 Fuel trap
23 EEC IV engine management module cover
24 Manifold absolute pressure sensor
25 Ignition module
1.8 litre (XR2i) Zetec SEFi fuel injection engine
1 Engine oil filler cap
2 Engine oil level dipstick
3 Cooling system expansion tank
4 Braking system fluid reservoir
5 Windscreen/tailgate washer fluid reservoir
cap
6 Battery
7 VIN plate
8 Thermostat housing
9 Timing belt cover
10 Top of suspension strut mounting
assembly
11 Windscreen wiper motor mounting bracket
12 Jack and wheelbrace retaining bolt
13 Distributorless (E-DIS) ignition coil
14 Fuel filter
15 Air cleaner
16 Air inlet duct
17 Idle speed control valve
18 Fuel pressure regulator
19 Throttle housing
20 Inlet manifold
21 Throttle position sensor
22 Fuel system pressure release/test point
23 EEC IV engine management module cover
24 Mass air flow sensor
25 Ignition module
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3 Engine oil and filter renewal
1
1Make sure that you have all the necessary
tools before you begin this procedure (see
illustration) . You should also have plenty of
rags or newspapers handy, for mopping up
any spills.
2 To avoid any possibility of scalding, and to
protect yourself from possible skin irritants
and other harmful contaminants in used
engine oils, it is advisable to wear gloves
when carrying out this work. 3
Access to the underside of the vehicle is
greatly improved if the vehicle can be lifted on a
hoist, driven onto ramps, or supported by axle
stands (see “Jacking and Vehicle Support” ).
Warning: Do not work under a
vehicle which is supported only
by an hydraulic or scissors-type
jack, or by bricks, blocks of
wood, etc. 4
If this is your first oil change, get under the
vehicle and familiarise yourself with the
position of the engine oil drain plug location in
the sump. The engine and exhaust
components will be warm during the actual
work, so try to anticipate any potential
problems while the engine and accessories
are cool.
5 The oil should preferably be changed when
the engine is still fully warmed-up to normal
operating temperature, just after a run (the
needle on the temperature gauge should be in
the “Normal” sector of the gauge); warm oil
and sludge will flow out more easily. Park the
vehicle on firm, level ground, apply the
handbrake firmly, then select 1st or reverse
gear (manual transmission) or the “P” position
(automatic transmission). Open the bonnet
and remove the engine oil filler cap from the
cylinder head cover, then remove the oil level
dipstick from its tube (see “Weekly Checks”).
6 Raise the front of the vehicle, and support it
securely on axle stands (see “Jacking and
Vehicle Support” ). Remove the front right-
hand roadwheel to provide access to the oil
1 Introduction
This Chapter is designed to help the home
mechanic maintain his/her vehicle for safety,
economy, long life and peak performance.
This Chapter contains a master
maintenance schedule, followed by Sections
dealing specifically with each task in the
schedule. Visual checks, adjustments,
component renewal and other helpful items
are included. Refer to the accompanying
illustrations of the engine compartment and
the underside of the vehicle for the locations
of the various components.
Servicing your vehicle in accordance with
the mileage/time maintenance schedule and
the following Sections will provide a planned
maintenance programme, which should result
in a long and reliable service life. This is a
comprehensive plan, so maintaining some
items but not others at the specified service
intervals will not produce the same results. As you service your vehicle, you will
discover that many of the procedures can -
and should - be grouped together, because of
the particular procedure being performed, or
because of the close proximity of two
otherwise-unrelated components to one
another. For example, if the vehicle is raised
for any reason, the exhaust should be
inspected at the same time as the suspension
and steering components.
The first step of this maintenance
programme is to prepare yourself before the
actual work begins. Read through all the Sections relevant to the work to be carried
out, then make a list and gather together all
the parts and tools required. If a problem is
encountered, seek advice from a parts
specialist or a dealer service department.
2 Intensive maintenance
1
If, from the time the vehicle is new, the
routine maintenance schedule is followed
closely, and frequent checks are made of fluid
levels and high-wear items, as suggested
throughout this manual, the engine will be
kept in relatively good running condition, and
the need for additional work will be minimised.
2 It is possible that there will be some times
when the engine is running poorly due to the
lack of regular maintenance. This is even more
likely if a used vehicle, which has not received
regular and frequent maintenance checks, is
purchased. In such cases, additional work
may need to be carried out, outside of the
regular maintenance intervals.
3 If engine wear is suspected, a compression
test (refer to Part A, B or C of Chapter 2) will
provide valuable information regarding the
overall performance of the main internal
components. Such a test can be used as a
basis to decide on the extent of the work to
be carried out. If, for example, a compression
test indicates serious internal engine wear,
conventional maintenance as described in this
Chapter will not greatly improve the
performance of the engine, and may prove a waste of time and money, unless extensive
overhaul work (Chapter 2D) is carried out first.
4
The following series of operations are those
often required to improve the performance of
a generally poor-running engine:
Primary operations
a) Clean, inspect and test the battery (See
“Weekly Checks”).
b) Check all the engine-related fluids (See
“Weekly Checks”).
c) Check the condition of the auxiliary drivebelt (Section 4).
d) Check and if necessary adjust the valve
clearances on HCS engines (Section 7).
e) Renew the spark plugs and clean and inspect the HT leads (Section 21).
f) Check the condition of the air cleaner filter element and renew if necessary
(Section 24).
g) Check and if necessary adjust the idle speed and mixture settings - where
applicable (Section 9).
h) Renew the fuel filter - fuel injection models (Section 30).
i) Check the condition of all hoses, and check for fluid leaks (Section 5).
5 If the above operations do not prove fully
effective, carry out the following operations:
Secondary operations
All the items listed under “Primary
operations”, plus the following: a) Check the charging system (Chapter 5A).
b) Check the ignition system (Chapter 5B).
c) Check the fuel system (Chapter 4A, 4B,
4C and 4D).
e) Renew the ignition HT leads (Section 21).
Maintenance procedures1•9
3.2 These tools are required when changing the engine oil and filter
1
1595Ford Fiesta Remake
Every 5000 miles (8000 km) or 6 months, whichever occurs first
Frequent oil changes are the
best preventive
maintenance the home
mechanic can give the
engine, because ageing oil becomes
diluted and contaminated, which leads
to premature engine wear.
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if nothing worse. If the outer electrode is not
exactly over the centre electrode, bend it gently
to align them. Special spark plug gap adjusting
tools are available from motor accessory shops,
or from certain spark plug manufacturers.
14Before fitting the spark plugs, check that
the threaded connector sleeves at the top of
the plugs are tight, and that the plug exterior
surfaces and threads are clean. Brown
staining on the porcelain, immediately above
the metal body, is quite normal, and does not
necessarily indicate a “leak” between the
body and insulator.
15 Apply a smear of copper-based grease or
anti-seize compound to the threads of each
plug, and screw them in by hand where
possible. Take extra care to enter the plug
threads correctly, as the cylinder head is of
aluminium alloy.
16 When each spark plug is started correctly
on its threads, screw it down until it just seats
lightly, then tighten it to the specified torque
wrench setting. If a torque wrench is not
available - and this is one case where the use of
a torque wrench is strongly recommended -
tighten each spark plug through no more than
1/4 of a turn (CVH and PTE engines) or 1/16 of a
turn (HCS and Zetec engines) after it seats. HCS
and Zetec engines are fitted with taper-seat
spark plugs, identifiable by not having a sealing
washer, and these in particular should NEVER
be overtightened - their tapered seats mean
they are almost impossible to remove if abused.
17 Reconnect the spark plug (HT) leads in
their correct order, using a twisting motion on
the boot until it is firmly seated on the end of
the spark plug and on the cylinder head cover.
Spark plug (HT) lead, distributor
cap and rotor arm check
18 The spark plug (HT) leads should be
checked whenever the plugs themselves are renewed. Start by making a visual check of
the leads while the engine is running. In a
darkened garage (make sure there is
ventilation) start the engine and observe each
lead. Be careful not to come into contact with
any moving engine parts. If there is a break in
the lead, you will see arcing or a small spark
at the damaged area.
19
The spark plug (HT) leads should be
inspected one at a time, to prevent mixing up
the firing order, which is essential for proper
engine operation. Each original lead should
be numbered to identify its cylinder. If the
number is illegible, a piece of tape can be
marked with the correct number, and
wrapped around the lead (the leads should be
numbered 1 to 4, with No 1 lead nearest the
timing belt end of the engine). The lead can
then be disconnected.
20 Check inside the boot for corrosion, which
will look like a white crusty powder. Clean this
off as much as possible; if it is excessive, or if
cleaning leaves the metal connector too badly
eroded to be fit for further use, the lead must
be renewed. Push the lead and boot back
onto the end of the spark plug. The boot
should fit tightly onto the end of the plug - if it
doesn’t, remove the lead and use pliers
carefully to crimp the metal connector inside
the boot until the fit is snug.
21 Using a clean rag, wipe the entire length
of the lead to remove built-up dirt and grease. Once the lead is clean, check for burns,
cracks and other damage. Do not bend the
lead sharply, because the conductor might
break.
22 Disconnect the lead from the ignition coil
by pressing together the plastic retaining
catches (where fitted) and pulling the end
fitting off the coil terminal. Check for corrosion
and for a tight fit. If a meter with the correct
measuring range is available, measure the
resistance of the disconnected lead from its
coil connector to its spark plug connector. If
the resistance recorded for any of the leads
exceeds the value specified, all the leads
should be renewed as a set. Refit the lead to
the coil, noting that each coil terminal is
marked with its respective cylinder number,
so that there is no risk of mixing up the leads
and upsetting the firing order.
23 Inspect the remaining spark plug (HT)
leads, ensuring that each is securely fastened
at the distributor cap or ignition coil and spark
plug when the check is complete. If any sign
of arcing, severe connector corrosion, burns,
cracks or other damage is noticed, obtain new
spark plug (HT) leads, renewing them as a set.
If new spark plug leads are to be fitted,
remove and refit them one at a time, to avoid
mix-ups in the firing order. 24
On models with distributor ignition
systems, refer to Chapter 5B and remove the
distributor cap then thoroughly clean it inside
and out with a dry lint-free rag.
25 Examine the HT lead segments inside the
cap. If they appear badly burned or pitted
renew the cap. Also check the carbon brush
in the centre of the cap, ensuring that it is free
to move and stands proud of its holder. Make
sure that there are no sign of cracks or black
“tracking” lines running down the inside of the
cap, which will also mean renewal if evident.
26 Inspect the rotor arm checking it for
security and also for signs of deterioration as
described above.
27 Refit the cap as described in Chapter 5B
on completion.
22 Idle speed control valve cleaning and maintenance
1
Note: The idle speed control valve may be
mounted on the air cleaner, on the engine
compartment bulkhead, or on the side of the inlet
manifold according to valve make and year of
manufacture. Valves manufactured by Weber are
mounted on the air cleaner and only these valves
require the periodic maintenance described
below. Bulkhead and inlet manifold mounted
valves are manufactured by Hitachi and are
maintenance free. Refer to the warning note in
Section 1 of Chapter 4C before proceeding.
1 Remove the valve as described in Chap-
ter 4C, Section 14.
2 Immerse the valve head in a suitable
container filled with clean petrol, and allow it
to soak for approximately three minutes.
3 Clean the valve bore, slots and piston with
petrol, using a suitable lint-free cloth, then
gently move the piston up and down in its
bore using a small screwdriver (see
illustration) . Ensure that no cloth particles
enter the bore, and do not use the slots to
move the piston.
4 Rinse the valve again with clean petrol, then
dry it using an air line (or other source of
compressed air).
Warning: Wear eye protection
when using compressed air!
5 Clean the mating faces of the valve and the
air filter housing then refit as described in
Chapter 4C, Section 14.
1•20Every 20 000 miles or two years
22.3 Gently move the idle speed control
valve piston up and down in its bore using
a small screwdriver (1.6 litre EFi engine)
1595Ford Fiesta Remake
It’s often difficult to insert spark plugs
into their holes without cross-threading
them. To avoid this possibility, fit a
short piece of rubber hose over the end
of the spark plug. The flexible hose
acts as a universal joint, to help align
the plug with the plug hole. Should the
plug begin to cross-thread, the hose
will slip on the spark plug, preventing
thread damage.
If new spark plug leads are tobe fitted, remove the leads
one at a time and fit each
new lead in exactly the same
position as the old one.
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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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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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inspecting carefully for any wear grooves,
pitting or scoring around the teeth.
21Refit the thrustwasher with its curved side
facing outwards, followed by the Woodruff
key.
22 Lubricate the oil seal and the crankshaft
sprocket with engine oil, then position the
sprocket on the crankshaft with its thrust face
facing outwards.
23 Using the auxiliary drivebelt pulley and its
retaining bolt, draw the sprocket fully into
position on the crankshaft. Remove the
pulley.
24 Refit the timing belt as described in
Section 8.
10 Camshaft oil seal - renewal
3
1Remove the camshaft sprocket as
described in the previous Section.
2 The oil seal is now accessible for removal.
Note its direction of fitting, then using a
suitable screwdriver or a tool with a hooked
end to lever and extract the seal from its
housing (but take care not to damage the
housing with the tool) (see illustration).
3 Check that the housing is clean before
fitting the new seal. Lubricate the lips of the
seal and the running faces of the camshaft
with clean engine oil. Carefully locate the seal
over the camshaft, and drive it squarely into
position using a suitable tube or a socket (see
illustration) . An alternative method of fitting is to draw it squarely into position using the old
sprocket bolt and a suitable distance piece.
4
With the seal fully inserted in its housing,
refit the camshaft sprocket as described in
the previous Section.
11 Camshaft, rocker arms and tappets - removal, inspection
and refitting
3
Removal
1 Disconnect the battery negative (earth) lead
(refer to Chapter 5A, Section 1).
2 Refer to the appropriate earlier Sections in
this Chapter, and remove the timing belt
upper cover and the rocker cover.
3 On carburettor models, refer to Chapter 4A
and remove the fuel pump. On models equipped with a distributor ignition system,
refer to Chapter 5B and remove the distributor.
On PTE engines, refer to Chapter 4D and
remove the camshaft position sensor.
4
On models equipped with distributorless
ignition system, detach, unbolt and remove
the ignition coil, its support bracket and the
interference capacitor from the end of the
cylinder head, as described in Chapter 5B.
5 Undo the retaining nuts and remove the
guides, rocker arms and spacer plates (see
illustrations) . Keep the respective
components in their original order of fitting by
marking them with a piece of numbered tape,
or by using a suitable sub-divided box.
6 Withdraw the hydraulic tappets, again
keeping them in their original fitted sequence.
The tappets should be placed in an oil bath
while removed (see illustrations) .
7 Unbolt and remove the lower cover beneath
CVH and PTE engine in-car repair procedures 2B•7
11.5a Undo the rocker arm retaining nut . . .
10.3 Using a socket to tap the camshaft
oil seal into place
11.6b Store tappets in clearly-marked
container filled with oil to prevent oil loss11.6a Removing a hydraulic tappet
11.5c . . . followed by the rocker arm . . .11.5b . . . withdraw the guide . . .
11.5d . . . and spacer plate
10.2 Camshaft front oil seal removal
2B
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