1989 FORD FIESTA sensor

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Page 6 of 296

FORD FIESTA 1989 Service Repair Manual 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 Ba

Page 7 of 296

FORD FIESTA 1989 Service Repair Manual 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

Page 8 of 296

FORD FIESTA 1989 Service Repair Manual Maintenance – component location1•7
1
1595Ford Fiesta Remake
Front underside view of the 1.4 litre CVH CFi fuel injection model
1 Engine oil sump
2 Front suspension lower arm
3 Brake caliper assem

Page 24 of 296

FORD FIESTA 1989 Service Repair Manual SEFi fuel injection models
7Disconnect the mass air flow sensor wiring
multi-plug (see illustration) .
8 Slacken the hose clip and disconnect the
flexible rubber intake hose from the black
plastic ai

SEFi fuel injection models
7Disconnect the mass air flow sensor wiring
multi-plug (see illustration) .
8 Slacken the hose clip and disconnect the
flexible rubber intake hose from the black
plastic air intake duct (see illustration).
9 Undo the retaining screws or release the
clips and lift off the air cleaner lid complete
with mass air flow sensor (see illustration).
All models
10Lift out the element, and wipe out the
housing (see illustrations) . Check that no
foreign matter is visible, either in the air inlet
or in the air mass meter, as applicable.
11 If carrying out a routine service, the
element must be renewed regardless of its
apparent condition. Note that on models so
equipped, the small foam PCV filter in the rear
right-hand corner of the air cleaner housing
must be cleaned whenever the air filter
element is renewed (see Section 25).
12 If you are checking the element for any
other reason, inspect its lower surface; if it is
oily or very dirty, renew the element. If it is
only moderately dusty, it can be re-used after
blowing it clean from the upper to the lower
surface with compressed air. Warning: Wear eye protection
when using compressed air!
Because it is a pleated-paper
type filter, it cannot be washed
or re-oiled. If it cannot be cleaned satisfactorily with compressed air,
discard and renew it.
Caution: Never drive the vehicle with the
air cleaner filter element removed.
Excessive engine wear could result, and
backfiring could even cause a fire under
the bonnet.
13
Refitting is the reverse of the removal
procedure. Ensure that the element and cover
are securely seated, so that unfiltered air
cannot enter the engine.Air cleaner temperature control
system check (carburettor
models)
14 In order for the engine to operate
efficiently, the temperature of the air entering
the inlet system must be controlled within
certain limits.
15 The air cleaner has two sources of air, one
direct from the outside of the engine
compartment, and the other from a shroud on
the exhaust manifold. On HCS engines, a
wax-controlled thermostatic valve controls a
flap inside the air cleaner inlet. When the
ambient air temperature is below a
predetermined level, the flap admits air
heated from the exhaust manifold shroud; as
the ambient temperature rises, the flap opens
to admit more cool air from the engine
compartment until eventually it is fully open. A
similar system is used on CVH engines,
except that a vacuum actuator modifies any opening or closing action of the temperature
sensor on the flap valve, according to the level
of the inlet manifold vacuum under running
conditions.
HCS engines
16
This check must be made when the
engine is cold. Detach and remove the air
cleaner inlet trunking. Examine the position of
the check valve within the duct. When the
underbonnet air temperature is below 28ºC,
the valve must be open to allow hot air to
enter the filter (see illustration) .
17 Refit the inlet trunking. Start the engine
and run it until it reaches its normal operating
temperature, then stop the engine, remove
the inlet trunking and check that the valve has
closed off the air passage from the exhaust
and opened the main (cool) air inlet.
18 If the flap does not operate correctly,
check that it is not seized. Apart from this
there is no adjustment possible, and the unit
should be renewed if faulty. Refit the air inlet
trunking on completion.
CVH engines
19 This check must be made when the
engine is cold. Disconnect the main air inlet
duct, and visibly check that the flap to the
hot-air inlet is closed (i.e. open to the passage
of cold air).
20 Start the engine, and check that with the
Every 30 000 miles or three years1•23
24.9 . . . then undo the retaining screws or
release the clips and lift off the air cleaner lid complete with mass air flow sensor24.8 . . . slacken the hose clip and
disconnect the intake hose from the air intake duct . . .24.7 On SEFi fuel injection engines,
disconnect the mass air flow sensor wiring multi-plug . . .
24.16 Air cleaner inlet and flap valve onthe HCS engine
A Main air cleaner inlet (cool air)
B Warm air duct (flap open)
24.10b . . . and on EFi and SEFi fuel injection engine models24.10a Removing the air filter element oncarburettor engine models . . .
1
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Page 25 of 296

FORD FIESTA 1989 Service Repair Manual engine idling, the hot-air inlet is open to allow
warm air from the exhaust manifold area to
enter the air cleaner. If the flap operates as
described, it is functioning correctly (see
illustration) .

engine idling, the hot-air inlet is open to allow
warm air from the exhaust manifold area to
enter the air cleaner. If the flap operates as
described, it is functioning correctly (see
illustration) .
21 If the flap fails to operate as described,
check the condition of the vacuum pipe and
its connections, and check that the flap valve
has not seized. If these are in order, either the
temperature sensor or vacuum actuator is
faulty, and a new air cleaner assembly must
be obtained. Refit the main air duct on
completion.
25 Emission control system
check
1
General
1Of the emission control systems that may
be fitted, only the crankcase ventilation
system and the evaporative emission control
systems require regular checking, and even
then, the components of these systems
require minimal attention.
2 Should it be felt that the other systems are
not functioning correctly, the advice of a
dealer should be sought.
Crankcase ventilation system
3 The function of the crankcase ventilation
system is to reduce the emission of unburned
hydrocarbons from the crankcase, and to
minimise the formation of oil sludge. By
ensuring that a depression is created in the
crankcase under most operating conditions,
particularly at idle, and by positively inducing
fresh air into the system, the oil vapours and
“blow-by” gases collected in the crankcase
are drawn from the crankcase, through the air
cleaner or oil separator, into the inlet tract, to
be burned by the engine during normal
combustion.
4 On HCS engines, the system consists of a
vented oil filler cap (with an integral mesh
filter) and a hose connecting it to the oil
separator/engine breather valve connector on
the underside of the air cleaner housing. A further hose leads from the adapter/filter to
the inlet manifold.
5
On CVH engines, a closed-circuit type
crankcase ventilation system is used, the
function of which is basically the same as that
described for the HCS engine types, but the
breather hose connects directly to the rocker
cover. A separate filter is fitted in the hose to
the rocker cover in certain applications (see
illustration) .
6 The system fitted to the PTE engines is
similar to that used on the earlier (CVH)
engines on which these engines are based,
but with revisions to the hose arrangement to
suit the remotely sited air cleaner and fuel
injection system layout.
7 On Zetec engines, the crankcase ventilation
system main components are the oil
separator mounted on the front (radiator) side
of the cylinder block/crankcase, and the
Positive Crankcase Ventilation (PCV) valve set
in a rubber grommet in the separator’s left-
hand upper end. The associated pipework
consists of a crankcase breather pipe and two
flexible hoses connecting the PCV valve to a
union on the left-hand end of the inlet
manifold, and a crankcase breather hose
connecting the cylinder head cover to the air
cleaner assembly. A small foam filter in the
air cleaner prevents dirt from being drawn
directly into the engine.
8 Check that all components of the system
are securely fastened, correctly routed (with
no kinks or sharp bends to restrict flow) and in
sound condition; renew any worn or damaged
components.
9 On HCS engines, remove and inspect the
oil filler cap to ensure that it is in good
condition, and not blocked up with sludge.
10 Disconnect the hoses at the cap, and
clean the cap if necessary by brushing the
inner mesh filter with petrol, and blowing
through with light pressure from an air line.
Renew the cap if it is badly congested.
11 If oil leakage is noted, disconnect the
various hoses and pipes, and check that all
are clear and unblocked. Remove the air
cleaner lid, and check that the hose from the
cylinder head cover to the air cleaner housing
is clear and undamaged. 12
Where fitted, the PCV valve is designed to
allow gases to flow out of the crankcase only,
so that a depression is created in the
crankcase under most operating conditions,
particularly at idle. Therefore, if either the oil
separator or the PCV valve are thought to be
blocked, they must be renewed (see Chap-
ter 4E). In such a case, however, there is
nothing to be lost by attempting to flush out
the blockage using a suitable solvent. The
PCV valve should rattle when shaken.
13 While the air filter element is removed (see
Section 24), wipe out the housing, and on
Zetec engines, withdraw the small foam filter
from its location in the rear right-hand corner
of the housing (see illustration) . If the foam is
badly clogged with dirt or oil, it must be
cleaned by soaking it in a suitable solvent,
and allowed to dry before being refitted.
Evaporative emission control
systems
14 Refer to the checks contained in Chap-
ter 4E.
26 Automatic transmission fluid renewal
1
1The automatic transmission fluid should
only be changed when the transmission is
cold.
2 Position the vehicle over an inspection pit,
on vehicle ramps, or jack it up and securely
support it on axle stands, but make sure that
it is level.
3 Place a suitable container beneath the drain
plug on the transmission sump pan. Remove
the transmission fluid dipstick to speed up the
draining operation.
4 Thoroughly clean the area around the drain
plug in the transmission sump pan, then
unscrew the plug and allow the fluid to drain
into the container.
5 When all the fluid has drained (this may take
quite some time) clean the drain plug, then
refit it together with a new seal and tighten it
securely.
6 Place a funnel with a fine mesh screen in
the dipstick tube, and fill the transmission with
1•24Every 30 000 miles or three years
25.13 The crankcase ventilation system foam filter is located in the air cleaner housing on Zetec engines25.5 Crankcase ventilation system filter on CVH engines
24.20 Air cleaner inlet and flap valve onthe CVH engine
A Flap open (cool air inlet closed)
B Warm air inlet
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Page 32 of 296

FORD FIESTA 1989 Service Repair Manual 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

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
1595Ford Fiesta Remake
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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Page 34 of 296

FORD FIESTA 1989 Service Repair Manual 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, w

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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Page 46 of 296

FORD FIESTA 1989 Service Repair Manual 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 a

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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