manual transmission FORD SIERRA 1984 1.G CVH Engines Workshop Manual

1.6 litre engine
Note: Unless otherwise stated, the Specifications for the 1.6 litre CVH engine are as given for the 1.8 litre (R2A type) which follow.
General
Engine code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . L6B
Bore . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79.960 mm
Stroke . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79.520 mm
Cubic capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1596 cc
Compression ratio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9.0 :1
Compression pressure at starter motor speed . . . . . . . . . . . . . . . . . . . . 12.2 to 14.3 bars
Maximum continuous engine speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6000 rpm
Maximum engine power (DIN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59 kW at 5500 rpm
Maximum engine torque (DIN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121 Nm at 3500 rpm
Cylinder bore diameter
Standard class 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79.940 to 79.950 mm
Standard class 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79.950 to 79.960 mm
Standard class 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79.960 to 79.970 mm
Standard class 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79.970 to 79.980 mm
Oversize class A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80.230 to 80.240 mm
Oversize class B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80.240 to 80.250 mm
Oversize class C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80.250 to 80.260 mm
Chapter 2 Part C:
CVH engines
Camshaft and cam followers - removal, inspection and refitting . . . .23
Compression test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Crankcase ventilation system - inspection and maintenance . . . . . . .3
Crankshaft and bearings - examination and renovation . . . . . . . . . .33
Crankshaft and main bearings - removal and refitting . . . . . . . . . . . .32
Crankshaft front oil seal - renewal . . . . . . . . . . . . . . . . . . . . . . . . . . .25
Crankshaft rear oil seal - renewal . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Cylinder block and bores - examination and renovation . . . . . . . . . .34
Cylinder head - dismantling and reassembly . . . . . . . . . . . . . . . . . . .21
Cylinder head - inspection and renovation . . . . . . . . . . . . . . . . . . . . .22
Cylinder head - removal and refitting (engine in vehicle) . . . . . . . . . .19
Cylinder head - removal and refitting (engine removed) . . . . . . . . . . .20
Engine - refitting (automatic transmission in vehicle) . . . . . . . . . . . . .13
Engine - refitting (manual gearbox in vehicle) . . . . . . . . . . . . . . . . . . .12
Engine - removal leaving automatic transmission in vehicle . . . . . . . .9
Engine - removal leaving manual gearbox in vehicle . . . . . . . . . . . . . .8
Engine/automatic transmission assembly - reconnection and
refitting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Engine/automatic transmission assembly - removal and separation .11Engine dismantling, examination, renovation and reassembly - general
information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Engine/manual gearbox assembly - reconnection and refitting . . . . .14
Engine/manual gearbox assembly - removal and separation . . . . . .10
Engine mountings - renewal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Engine oil and filter - renewal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Flywheel/driveplate - removal, inspection and refitting . . . . . . . . . . .24
General information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Initial start-up after overhaul or major repair . . . . . . . . . . . . . . . . . . .35
Major operations possible with the engine in the vehicle . . . . . . . . . . .5
Major operations requiring engine removal . . . . . . . . . . . . . . . . . . . . .6
Method of engine removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Oil pump - dismantling, inspection and reassembly . . . . . . . . . . . . .29
Oil pump - removal and refitting . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
Pistons and connecting rods - examination and renovation . . . . . . .31
Pistons and connecting rods - removal and refitting . . . . . . . . . . . . .30
Sump - removal and refitting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
Timing belt and sprockets - removal and refitting . . . . . . . . . . . . . . .18
2C•1
Specifications Contents
2C
Easy,suitable for
novice with little
experienceFairly easy,suitable
for beginner with
some experienceFairly difficult,
suitable for competent
DIY mechanic
Difficult,suitable for
experienced DIY
mechanicVery difficult,
suitable for expert
DIY or professional
Degrees of difficulty

29Once clear of the gearbox, lift the engine
from the vehicle, taking care not to damage
the radiator fins (see illustration).
1.6 and 1.8 litre (R6A type)
30Proceed as described in paragraphs 1 to 5.
31Disconnect the coolant hoses from the
thermostat housing, noting their locations.
32Disconnect the lower radiator hose from
the coolant pump elbow and, where
applicable, disconnect the heater hose from
the T-piece on the lower radiator hose.
33On 1.6 engines, disconnect the coolant
hose from the central fuel injection (CFI) unit.
34Disconnect the brake servo vacuum hose
from the inlet manifold by carefully pressing
the clip on the inlet manifold connector into
the manifold using a screwdriver, and
withdrawing the hose.
35Disconnect the vacuum hoses from the
inlet manifold, noting their locations.
36On 1.6 litre engines, disconnect the two
hoses from the pulse-air system check valves
(see illustration).
37Gradually loosen the fuel inlet pipe union
on the CFI unit, to relieve the pressure in the
fuel system. Be prepared for fuel spray, and
take adequate fire precautions. Once the
pressure has reduced, disconnect the fuel
inlet and return hoses. Plug the ends of the
hoses to minimise petrol spillage.
38Disconnect the throttle cable, if
necessary.
39Disconnect the wiring from the following
components, as applicable.
Alternator
Starter motor
Oil pressure warning lamp switch
Temperature gauge sender
Engine coolant temperature sensor
Inlet air temperature sensor
Ignition coil
Throttle stepper motor
Throttle position sensor
Fuel injector
Cooling fan switch
Air charge temperature sensor
Engine earth strap to battery tray
40On 1.8 litre engine models with power
steering, slacken the power steering pump
pulley bolts, then remove the alternator/power
steering pump drivebelt. Remove the pulley,
unbolt the power steering pump from its
bracket, and move it clear of the engine.41Unscrew and remove the top engine-to-
gearbox bolts which are accessible from the
engine compartment.
42Apply the handbrake (if not already done),
jack up the front of the vehicle and support it
on axle stands (see “Jacking and Vehicle
Support”).
43Drain the engine oil into a suitable
container.
44Remove the starter motor.
45Disconnect the exhaust gas oxygen
sensor wiring connector, then remove the
exhaust downpipe.
46Disconnect the wiring plug from the
crankshaft speed/position sensor.
47Unscrew the two nuts securing the engine
mountings to the crossmember. Recover the
washers.
48Unscrew and remove the remaining
engine-to-gearbox bolts, noting the location
of the earth strap and any wiring brackets,
and remove the two bolts from the engine
adapter plate (see illustration).
49Unscrew the securing bolt, and remove
the crankshaft speed/position sensor shroud
(where fitted).
50On 1.6 litre engines, working inside the
vehicle, place a wooden block under the
clutch pedal to raise it fully against its stop.
This will hold the automatic adjuster pawl
clear of the toothed quadrant. Disconnect the
clutch cable from the release arm, and pass
the cable through the bellhousing. Note the
cable routing for use when refitting.
51Proceed as shown in paragraphs 25 to 29.Note: A suitable hoist and lifting tackle will be
required for this operation.
1Proceed as described in Section 8,
paragraphs 1 to 15 inclusive. Additionally, if
applicable disconnect the kickdown cable
from the carburettor.
2Unscrew and remove the top engine-to-
transmission bolts which are accessible from
the engine compartment. Note the location of
the vacuum pipe bracket and transmission
dipstick tube bracket.
3Proceed as described in Section 8,
paragraphs 17 to 21 inclusive.
4Working through the starter motor aperture,
unscrew the four torque converter-to-
driveplate nuts. It will be necessary to turn the
crankshaft using a suitable spanner on the
crankshaft pulley bolt in order to gain access
to each nut in turn through the aperture.
5Unscrew and remove the remaining engine-
to-transmission bolts, noting the location of
the earth strap, and remove the two bolts
from the engine adapter plate. Where
applicable pull the blanking plug from the
adapter plate.
6Lower the vehicle to the ground and
support the transmission with a trolley jack,
using a block of wood between the jack and
the transmission to spread the load.
7Make a final check to ensure that all
relevant wires, pipes and hoses have been
disconnected to facilitate engine removal.
8Attach a suitable hoist to the engine lifting
brackets located at the front and rear of the
cylinder head, and carefully take the weight of
the engine. The engine should be supported
horizontally, ie do not allow it to tilt front to rear.
9Raise the engine until the engine mounting
studs are clear of the crossmember, then pull
the engine forwards to disconnect it from the
transmission. Ensure that the torque converter
is held firmly in place in the transmission
housing, otherwise it could fall out resulting in
fluid spillage and possible damage. It may be
necessary to rock the engine a little to release
it from the transmission.
10Once clear of the transmission, lift the
engine from the vehicle, taking care not to
damage the radiator fins.
Note: A suitable hoist and lifting tackle will be
required for this operation.
1.8 litre (R2A type)
Removal
1Proceed as described in Section 8,
paragraphs 1 to 15 inclusive.
2Working inside the vehicle, unscrew the
gear lever knob and remove the centre
10Engine/manual gearbox
assembly - removal and
separation
9Engine - removal leaving
automatic transmission in
vehicle
CVH engines 2C•7
2C
8.48 Engine adapter plate bolts (A) and
crankshaft speed/position sensor shroud
(B) - 1.6 litre
8.36 Pulse-air system check valves
(arrowed) - 1.6/1.8 litre (R6A)8.29 Lifting the engine from the vehicle -
1.8 litre (R2A)

console. Where a full-length console is fitted,
it is only necessary to remove the front tray.
3Detach the outer gaiter from the retaining
frame and withdraw it over the gear lever.
4Release the clips and remove the gaiter
retaining frame and inner gaiter.
5Using a suitable Torx key, remove the
screws securing the gear lever to the gearbox
extension housing, and withdraw the gear
lever. Note how the base of the gear lever
locates over the selector shaft.
6Jack up the vehicle and support on axle
stands (see “Jacking and Vehicle Support”).
Ensure that there is sufficient working room
beneath the vehicle.
7To improve access, disconnect the exhaust
downpipe from the manifold and remove the
exhaust system.
8Remove the propeller shaft.
9Where applicable bend back the locktabs,
then unscrew the two bolts securing each of
the two anti-roll bar U-clamps to the vehicle
underbody. Lower the anti-roll bar as far as
possible.
10Proceed as described in Section 8,
paragraphs 23 and 24.
11Drain the engine oil into a container.
12Unscrew the two nuts securing the engine
mountings to the crossmember. Recover the
washers.
13Disconnect the wiring from the reversing
lamp switch.
14Remove the retaining circlip, and
withdraw the speedometer cable from the
gearbox extension housing.
15Support the gearbox with a trolley jack,
using a block of wood between the jack and
the gearbox to spread the load.
16Unscrew the four bolts securing the
gearbox crossmember to the vehicle
underbody. Unscrew the central bolt securing
the crossmember to the gearbox and remove
the crossmember. Note the position of the
earth strap, where applicable. Recover the
mounting cup and where applicable the
exhaust mounting bracket and heat shield.
17Make a final check to ensure that all
relevant wires, pipes and hoses have been
disconnected to facilitate removal of the
engine/gearbox assembly.
18Attach a hoist to the engine lifting
brackets located at the front and rear of the
cylinder head. Arrange the lifting tackle so that
the engine/gearbox assembly will assume a
steep angle of approximately 40º to 45º as it is
being removed.
19Raise the engine/gearbox so that the
engine mounting studs are clear of the
crossmember, then ease the assembly
forwards, at the same time lowering the trolley
jack which is supporting the gearbox. Lift the
assembly from the vehicle, taking care not to
damage the surrounding components.
20With the engine/gearbox assembly
removed, temporarily reconnect the anti-roll
bar to the underbody if the vehicle is to be
moved.
Separation
21To separate the engine from the gearbox,
proceed as follows. 22Remove the starter motor.
23Support the engine and gearbox
horizontally on blocks of wood.
24Unscrew and remove the engine-to-
gearbox bolts, noting the location of the earth
strap, and remove the two bolts from the
engine adapter plate.
25Pull the engine and gearbox apart, taking
care not to strain the gearbox input shaft. It
may be necessary to rock the units slightly to
separate them.
1.6 and 1.8 litre (R6A type)
26Proceed as described in paragraphs 30 to
40 inclusive of Section 8.
27Proceed as described in paragraphs 2 to
25 inclusive of Section 10, noting the
following points.
28Disconnect the wiring from the vehicle
speed sensor mounted on the gearbox before
removing the engine/gearbox assembly.
29Note that on 1.6 litre engines, the
crankshaft speed/position sensor shroud
(which is secured by a single bolt) must be
removed before separating the engine from
the gearbox.
Note: A suitable hoist and lifting tackle will be
required for this operation. Any suspected
faults in the automatic transmission should be
referred to a Ford dealer or automatic
transmission specialist before removal of the
unit, as the specialist fault diagnosis
equipment is designed to operate with the
transmission in the vehicle.
Removal
1Proceed as described in Section 8,
paragraphs 1 to 15 inclusive, but additionally,
where applicable disconnect the kickdown
cable from the carburettor.
2Jack up the vehicle and support on axle
stands (see “Jacking and Vehicle Support”).
Ensure that there is sufficient working room
beneath the vehicle.
3To improve access, disconnect the exhaust
downpipe from the manifold and remove the
exhaust system.
4Remove the propeller shaft.
5Where applicable bend back the locktabs,
then unscrew the two bolts securing each of
the two anti-roll bar U-clamps to the vehicle
underbody. Lower the anti-roll bar as far as
possible.
6Unscrew the unions and disconnect the
fluid cooler pipes from the transmission. Plug
the open ends of the pipes and the
transmission to prevent dirt ingress and fluid
leakage. Remove the fluid cooler pipe bracket
from the engine mounting bracket and place it
to one side.
7Remove the two clips securing the selector
rod, and detach the selector rod from the
manual selector lever, and the selector lever
on the transmission,
8If applicable, disconnect the kickdown cable
from the transmission and withdraw the cable.9Disconnect the wiring from the starter
inhibitor/reversing lamp switch, the lock-up
clutch and where applicable the kickdown
solenoid.
10Remove the securing screw, and
disconnect the speedometer cable from the
transmission extension housing. Plug the
opening in the transmission to prevent dirt
ingress.
11Disconnect the vacuum pipe from the
vacuum diaphragm unit, and unclip the pipe
from its securing bracket on the transmission
housing.
12Drain the engine oil into a container.
13Unscrew the two nuts securing the engine
mountings to the crossmember. Recover the
washers.
14Support the transmission with a trolley
jack using a block of wood between the jack
and the transmission to spread the load.
15Unscrew the four bolts securing the
transmission crossmember to the vehicle
underbody. Note the position of the earth
strap, where applicable. Unscrew the central
bolt securing the crossmember to the
transmission and remove the crossmember.
Recover the mounting cup and the exhaust
mounting bracket.
16Make a final check to ensure that all
relevant wires, pipes and hoses have been
disconnected to facilitate removal of the
engine/transmission assembly.
17Attach a suitable hoist to the engine lifting
brackets located at the front and rear of the
cylinder head. Arrange the lifting tackle so that
the engine/transmission assembly will assume
a steep angle of approximately 40º to 45º as it
is being removed.
18Raise the engine/transmission so that the
engine mounting studs are clear of the
crossmember, then ease the assembly
forwards, at the same time lowering the trolley
jack which is supporting the transmission. Lift
the assembly from the vehicle, taking care not
to damage surrounding components.
19With the engine/transmission assembly
removed, temporarily reconnect the anti-roll
bar to the underbody if the vehicle is to be
moved.
Separation
20To separate the engine from the
transmission, proceed as follows.
21Remove the starter motor.
22Support the engine and transmission
horizontally on blocks of wood.
23Working through the starter motor
aperture, unscrew the four torque converter-
to-driveplate nuts. It will be necessary to turn
the crankshaft using a suitable spanner on the
crankshaft pulley bolt in order to gain access
to each nut in turn through the aperture.
24Unscrew and remove the engine-to-
transmission bolts, noting the locations of the
earth strap, vacuum pipe bracket, and
transmission dipstick tube bracket. Remove
the two bolts from the engine adapter plate,
and where applicable pull the blanking plug
from the adapter plate.
25Pull the engine and transmission apart,
ensuring that the torque converter is held
11Engine/automatic
transmission assembly -
removal and separation
2C•8CVH engines

firmly in place in the transmission housing,
otherwise it could fall out resulting in fluid
spillage and possible damage. It may be
necessary to rock the units slightly to
separate them.
1.8 litre (R2A type)
1Reverse the procedure described in
Section 8, noting the following points.
2Before attempting to refit the engine, check
that the clutch friction disc is centralised. This
is necessary to ensure that the gearbox input
shaft splines will pass through the splines in
the centre of the friction disc.
3Check that the clutch release arm and
bearing are correctly fitted, and lightly grease
the input shaft splines.
4Check that the engine adapter plate is
correctly positioned on its locating dowels.
5Reconnect the clutch cable to the release
arm, ensuring that it is routed as noted during
removal.
6Fill the engine with the correct grade and
quantity of oil.
7Fill the cooling system.
8Check and if necessary adjust the tension
of the alternator drivebelt.
9Adjust the throttle cable.
1.6 and 1.8 litre (R6A type)
10Reverse the procedure described in
Section 8, noting the points made above.
1Reverse the procedure described in
Section 9, noting the following points.
2Check that the engine adapter plate is
correctly positioned on its locating dowels.
3As the torque converter is only loosely
engaged in the transmission, care must be
taken to prevent the torque converter from
falling out forwards. When the torque
converter hub is fully engaged with the fluid
pump drivegear in the transmission, distance
“A” in illustration 2.24 of Chapter 7B must be
as specified. Incorrect installation of the
torque converter will result in damage to the
transmission.
4As the engine is installed, guide the torque
converter studs through the holes in the
driveplate. When the engine is positioned
flush with the engine adapter plate and the
transmission housing, check that the torque
converter is free to move axially a small
amount before refitting and tightening the
engine-to-transmission bolts.
5Do not tighten the torque converter-to-
driveplate nuts until the lower engine-to-
transmission bolts have been fitted and
tightened.
6Fill the engine with the correct grade and
quantity of oil. 7Fill the cooling system.
8Check and if necessary adjust the tension
of the alternator drivebelt.
9Adjust the throttle cable.
10If applicable, adjust the kickdown cable.
1.8 litre (R2A type)
1Reverse the procedure described in Section
10, noting the following points.
2Before attempting to reconnect the engine
to the gearbox, check that the clutch friction
disc is centralised. This is necessary to ensure
that the gearbox input shaft splines will pass
through the splines in the centre of the friction
disc.
3Check that the clutch release arm and
bearing are correctly fitted, and lightly grease
the input shaft splines.
4Check that the engine adapter plate is
correctly positioned on its locating dowels.
5Reconnect the clutch cable to the release
arm, ensuring that it is routed as noted during
removal.
6Fill the engine with the correct grade and
quantity of oil.
7Fill the cooling system.
8Check and if necessary top-up the gearbox
oil level.
9Check and if necessary adjust the tension
of the alternator drivebelt.
10Adjust the throttle cable.
1.6 and 1.8 litre (R6A type)
11Reverse the procedure described in
Section 10, noting the points made above.
Ensure that the vehicle speed sensor wiring
plug is reconnected.
1Reverse the procedure described in Section
11, noting the following points.
2Check that the engine adapter plate is
correctly positioned on its locating dowels.
3As the torque converter is only loosely
engaged in the transmission, care must be
taken to prevent the torque converter from
falling out forwards. When the torque
converter hub is fully engaged with the fluid
pump drivegear in the transmission, distance
“A” in illustration 2.24 of Chapter 7B must be
as specified. Incorrect installation of the
torque converter will result in damage to the
transmission.
4As the engine and transmission are
reconnected, guide the torque converter
studs through the holes in the driveplate.
When the engine is positioned flush with the
engine adapter plate and the transmission
housing, check that the torque converter is
free to move axially a small amount beforerefitting and tightening the engine-to-
transmission bolts.
5Do not tighten the torque converter-to-
driveplate nuts until the lower engine-to-
transmission bolts have been fitted and
tightened.
6Reconnect and adjust the selector rod.
7Fill the engine with the correct grade and
quantity of oil.
8Fill the cooling system.
9Check and if necessary top-up the
transmission fluid level.
10Check and if necessary adjust the tension
of the alternator drivebelt.
11Adjust the throttle cable.
12Where applicable, adjust the kickdown
cable.
1The engine mountings incorporate
hydraulic dampers and must be renewed if
excessive engine movement is evident.
2Working in the engine compartment,
unscrew the central nuts securing the engine
mounting brackets to the tops of the
mountings. Recover the washers.
3Apply the handbrake, jack up the front of
the vehicle and support on axle stands (see
“Jacking and Vehicle Support”).
4Working underneath the vehicle, remove
the central nuts securing the mountings to the
crossmember. Recover the washers.
5Raise the engine using a suitable hoist and
lifting tackle attached to the engine lifting
brackets on the cylinder head, or a jack and
interposed block of wood under the sump,
until the mountings can be withdrawn.
6Fit the new mountings, then lower the
engine onto them. Note that the locating pins
on the mountings must engage with the
corresponding holes in the engine mounting
brackets (see illustration).
7Fit the nuts and washers securing the
mountings to the crossmember and tighten
the nuts.
8Lower the vehicle to the ground and fit the
nuts and washers securing the engine
mounting brackets to the mountings. Tighten
the nuts.
16Engine mountings - renewal
15Engine/automatic
transmission assembly -
reconnection and refitting
14Engine/manual gearbox
assembly - reconnection and
refitting
13Engine - refitting (automatic
transmission in vehicle)
12Engine - refitting (manual
gearbox in vehicle)
CVH engines 2C•9
2C
16.6 Locating pin on mounting must
engage with hole (arrowed) in engine
mounting bracket