light FORD SIERRA 1991 2.G DOHC Engine Workshop Manual

Note:A hoist and lifting tackle will be
required.
1Disconnect the battery negative lead.
2Remove the bonnet.
3On carburettor models, remove the air
cleaner.
4On fuel injection models, remove the air
inlet hose, plenum chamber, and air cleaner
lid as an assembly.
5Disconnect the breather hose from the
camshaft cover, and unscrew the bolt securing
the hose support bracket to the left-hand side
of the cylinder head (see illustration).
6Drain the cooling system.
7To provide additional working space,
remove the radiator.
8Disconnect the coolant hoses from the
coolant pump housing on the left-hand side of
the engine.
9Disconnect the coolant hoses from the
thermostat housing.
10Disconnect the heater coolant hose from
the inlet manifold.
11Where applicable, release the coolant
hose from the bracket under the carburettor
automatic choke housing.
12On carburettor models, disconnect the
vacuum pipe from the engine management
module.
13Disconnect the brake servo vacuum hose
from the inlet manifold.14On fuel injection models, disconnect the
vacuum pipes from the MAP sensor (located
at the rear right-hand side of the engine
compartment) and, where applicable, from the
air conditioning system.
15On carburettor models, disconnect the
fuel supply and return hoses at the
carburettor, and plug the ends of the hoses to
minimise petrol spillage. Take adequate fire
precautions.
16On fuel injection models, slowly loosen
the fuel feed union at the fuel rail, to relieve
the pressure in the fuel system before
disconnecting the union. Be prepared for
petrol spillage, and take adequate fire
precautions. Disconnect the fuel feed hose,
and disconnect the fuel return hose from the
fuel pressure regulator. Plug the ends of the
hoses to minimise petrol spillage.
17Disconnect the throttle cable and move it
to one side.
18Disconnect the HT lead from the ignition
coil, and unclip it from the timing chain cover.
19Disconnect the wiring from the following
components as applicable, depending on
model:
Alternator.
Starter motor.
Oil pressure warning lamp switch.
Temperature gauge sender.
Cooling fan switch.
Anti-dieselling valve (carburettor models).
Automatic choke heater (carburettor models).
Engine coolant temperature sensor.
Crankshaft speed/position sensor.
Air charge temperature sensor.
Throttle position sensor.
Fuel temperature sensor.
Fuel injectors.
20On models fitted with power steering,
unbolt the power steering pump from its
mounting bracket and move it clear of the
engine. Note that there is no need to
disconnect the fluid hoses, but make sure that
the pump is adequately supported to avoid
straining them.
21On models fitted with air conditioning,
unbolt the air conditioning compressor from
its mounting bracket, and move it clear of the
engine. Do not disconnect the hoses; make
sure that the compressor is adequately
supported to avoid straining them.
22Unscrew and remove the top engine-to-
gearbox bolts which are accessible from theengine compartment. Note the location of the
bolts, and note the positions of the earth strap
and any wiring clips attached to the bolts (see
illustration).
23Unscrew the securing bolt, and
disconnect the earth lead from the rear left-
hand side of the cylinder head.
24Unscrew the nuts securing the engine
mountings to the engine mounting brackets.
25Apply the handbrake, jack up the front of
the vehicle and support it securely on axle
stands (see “Jacking and Vehicle Support”).
26Drain the engine oil into a suitable
container.
27Remove the starter motor.
28Remove the exhaust downpipe.
29Ensure that the steering wheel is
positioned in the straight-ahead position, then
remove the clamp bolt from the lower steering
column clamp, swivel the plate to one side, and
disconnect the lower steering column from the
lower flexible coupling (see illustration).
30Working inside the vehicle, place a wooden
block under the clutch pedal to raise it fully
against its stop, so holding the automatic
adjuster pawl clear of the toothed quadrant.
31Disconnect the clutch cable from the
clutch release arm, and pass the cable
through the bellhousing.
32Support the gearbox with a trolley jack,
using a block of wood between the jack and
the gearbox to spread the load.
33Unscrew and remove the remaining
engine-to-gearbox bolts, and remove the bolt
from the engine adapter plate (see
illustration). Recover any shims fitted
between the sump and the gearbox when
removing the lower engine-to-gearbox bolts.
5Engine - removal leaving
manual gearbox in vehicle
2B•4DOHC engine
5.5 Removing the hose support bracket
bolt from the cylinder head5.29 Removing the lower steering column
clamp bolt
5.33 Engine adapter plate bolt (arrowed)
5.22 Earth strap position on top engine-to-
gearbox (arrowed)
Warning: Vehicles equipped
with air conditioning:
Components of the air
conditioning system may
obstruct work being undertaken
on the engine and it is not always possible
to unbolt and move them aside
sufficiently, within the limits of their
flexible connecting pipes. In such a case,
the system should be discharged by a
Ford dealer or air conditioning specialist.
The refrigerant is harmless under normal
conditions but in the presence of a naked
flame (or a lighted cigarette) it forms a
highly toxic gas. Liquid refrigerant spilled
on the skin will cause frostbite. If
refrigerant enters the eyes, rinse them
with a diluted solution of boric acid and
seek medical advice immediately.

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.
14Lower the gearbox slightly on the jack,
then remove the securing circlip, and
disconnect the speedometer drive cable from
the gearbox.
15Disconnect the wiring from the reversing
lamp switch. On models with fuel injection,
disconnect the wiring from the vehicle speed
sensor mounted in the side of the gearbox.
16Unscrew the two securing bolts, and
disconnect the gear linkage support bracket
from the gearbox.
17Using a suitable pin punch, drive out the
roll-pin securing the gearchange rod to the
gear linkage.
18Attach 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. 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.
19To improve clearance in the engine
compartment when lifting the engine, unbolt
the engine mounting brackets from the
cylinder block, and remove them.
20Ensure that the steering wheel is
positioned in the straight-ahead position, then
remove the clamp bolt from the lower steering
column clamp, swivel the plate to one side,
and disconnect the lower steering column
from the lower flexible coupling.
21Detach the brake lines from the front
suspension crossmember.
22Support the crossmember with a jack (do
not remove the jack from under the gearbox),
then loosen the bolts securing the
crossmember to the underbody. Remove the
crossmember securing bolts, and carefully
lower the crossmember sufficiently to allow
the engine sump to clear the steering rack and
crossmember as the engine/gearbox
assembly is removed.
23Make a final check to ensure that all
relevant wires, pipes and hoses have been
disconnected to facilitate removal of the en-
gine/gearbox assembly.
24Raise the engine/gearbox, at the same
time lowering the trolley jack which is
supporting the gearbox.
25Place a suitable rod across the vehicle
underbody to support the gear linkage
support bracket whilst the gearbox is
removed.
26Tilt the engine/gearbox assembly using
the hoist and the trolley jack, until the
assembly can be lifted from the vehicle. Take
care not to damage surrounding components.
27If the vehicle is to be moved while the
engine/gearbox assembly is removed,
temporarily refit the suspension crossmember
and the anti-roll bar to the underbody, and
reconnect the steering column to the
intermediate shaft.Separation
28To separate the engine from the gearbox,
proceed as follows.
29Remove the starter motor.
30Support the engine and gearbox
horizontally on blocks of wood.
31Unscrew the engine-to-gearbox bolts,
noting the locations of the bolts, and the
positions of the earth strap and any wiring
clips attached to the bolts. Recover any shims
fitted between the sump and the gearbox
when removing the lower engine-to-gearbox
bolts.
32Unscrew the bolt from the engine adapter
plate.
33Pull 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.
Note: Refer to the warning at the beginning of
Section 5 before proceeding. 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 unit, as the
specialist fault diagnosis equipment is
designed to operate with the transmission in
the vehicle.
Removal
1Proceed as described in paragraphs 1 to 21
of Section 5.
2Unscrew the securing bolt, and disconnect
the earth lead from the rear left-hand side of
the cylinder head.
3Unscrew the nuts securing the engine
mountings to the engine mounting brackets.
4Jack up the vehicle and support it securely
on axle stands. (see “Jacking and Vehicle
Support”).
Ensure that there is enough working room
beneath the vehicle.
5To improve access, disconnect the exhaust
downpipe from the manifold, and remove the
exhaust system.
6Drain the engine oil into a suitable
container.
7On models fitted with a catalytic converter,
release the securing clips and withdraw the
exhaust heat shield from under the vehicle for
access to the propeller shaft.
8Remove the propeller shaft.
9Where applicable, bend back the locktabs,
then unscrew the two bolts in each case
securing the two anti-roll bar U-clamps to the
vehicle underbody. Lower the anti-roll bar as
far as possible.
10Support the transmission with a trolley
jack, using a block of wood between the jack
and the transmission to spread the load.
11Unscrew the four bolts securing thetransmission crossmember to the vehicle
underbody. Unscrew the central bolt securing
the crossmember to the transmission, 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.
12Lower the transmission slightly on the
jack.
13Unscrew 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. Where applicable, detach the fluid
cooler pipe bracket from the engine mounting
bracket, and move it to one side.
14Remove the two clips securing the
selector rod, and detach the selector rod from
the manual selector lever, and from the
selector lever on the transmission.
15Disconnect the wiring from the starter
inhibitor switch, kickdown solenoid, lock-up
clutch, reversing lamp switch, and where
applicable, the 3rd/4th gearchange solenoid.
16Remove the securing screw, and
disconnect the speedometer cable from the
transmission extension housing. Plug the
opening in the transmission to prevent dirt
ingress.
17Proceed as described in paragraphs 18 to
27 of Section 7, substituting transmission for
gearbox, and ignoring paragraph 25.
Separation
18To separate the engine from the
transmission, proceed as follows.
19Remove the starter motor.
20Support the engine and transmission
horizontally on blocks of wood.
21Working 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.
22Where applicable, remove the bolt
securing the transmission fluid dipstick tube
to the left-hand side of the cylinder block.
23Unscrew the engine-to-transmission
bolts, noting the locations of the bolts, and
the positions of the earth strap and any wiring
clips attached to the bolts. Recover any shims
fitted between the sump and the transmission
when removing the lower engine-to-
transmission bolts.
24Unscrew the bolt from the engine adapter
plate and, where applicable, pull the blanking
plug from the adapter plate.
25Pull the engine and the transmission
apart, ensuring 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 units slightly to
separate them.
8Engine/automatic
transmission assembly -
removal and separation
2B•6DOHC engine

1Reverse the procedure described in
paragraphs 1 to 40, Section 5, noting the
following points.
2Before attempting to refit the engine, check
that the clutch friction disc is centralised.
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. If
necessary, a cable-tie can be used to
temporarily secure the adapter plate in
position on the cylinder block using one of the
engine-to-gearbox bolt holes.
5If shims were fitted between the sump and
the gearbox, refit them in their original
locations when mating the engine to the
gearbox. If the engine has been overhauled,
where applicable fit the relevant shims as
calculated during engine reassembly.
6Reconnect the clutch cable to the release
arm, ensuring that it is routed as noted during
removal.
7Ensure that the roadwheels and the
steering wheel are in the straight-ahead
position before reconnecting the lower
steering column to the intermediate shaft, and
tighten the clamp bolt to the specified torque.
8Fill the engine with the correct grade and
quantity of oil.
9Check the throttle cable adjustment.
10Fill the cooling system.
11Tighten all fixings to the specified torque,
where applicable.
1Reverse the procedure in paragraphs 1 to
10 of Section 6, noting the following points.
2Check that the engine adapter plate is
correctly positioned on its locating dowels. If
necessary, a cable-tie can be used to
temporarily secure the adapter plate in
position on the cylinder block, using one of
the engine-to-transmission bolt holes.
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.
4If shims were fitted between the sump and
the transmission, refit them in their original
locations when mating the engine to the
transmission. If the engine has been
overhauled, where applicable fit the relevant
shims as calculated during engine
reassembly.5As 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.
6Do not tighten the torque converter-to-
driveplate nuts until the lower engine-to-
transmission bolts have been fitted and
tightened.
7Ensure that the roadwheels and the
steering wheel are in the straight-ahead
position before reconnecting the lower
steering column to the intermediate shaft.
8Fill the engine with the correct grade and
quantity of oil.
9Check the throttle cable adjustment.
10Fill the cooling system.
11Tighten all fixings to the specified torque,
where applicable.
1Reverse the procedure described in
paragraphs 1 to 33 of Section 7, noting the
following points.
2Before attempting to reconnect the engine
to the gearbox, check that the clutch friction
disc is centralised.
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. If
necessary, a cable-tie can be used to
temporarily secure the adapter plate in
position on the cylinder block, using one of
the engine-to-gearbox bolt holes.
5If shims were fitted between the sump and
the gearbox, refit them in their original
locations when mating the engine to the
gearbox. If the engine has been overhauled,
where applicable fit the relevant shims as
calculated during engine reassembly.
6Ensure that the roadwheels and the
steering wheel are in the straight-ahead
position before reconnecting the lower
steering column to the intermediate shaft.
7Reconnect the clutch cable to the release
arm, ensuring that it is routed as noted during
removal.
8Fill the engine with the correct grade and
quantity of oil.
9Check the throttle cable adjustment.
10Fill the cooling system.
11Check and if necessary top-up the
gearbox oil level.
12Tighten all fixings to the specified torque,
where applicable.1Reverse the procedure described in
paragraphs 1 to 25 of Section 8, noting the
following points.
2Check that the engine adapter plate is
correctly positioned on its locating dowels. If
necessary, a cable-tie can be used to
temporarily secure the adapter plate in
position on the cylinder block, using one of
the engine-to-transmission bolt holes.
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.
4If shims were fitted between the sump and
the transmission, refit them in their original
locations when mating the engine to the
transmission. If the engine has been
overhauled, where applicable fit the relevant
shims as calculated during engine
reassembly.
5As the engine and transmission are mated
together, 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.
6Do not tighten the torque converter-to-
driveplate nuts until the lower engine-to-
transmission bolts have been fitted and
tightened.
7Ensure that the roadwheels and the
steering wheel are in the straight-ahead
position before reconnecting the lower
steering column to the intermediate shaft.
8Reconnect the selector rod and check for
correct adjustment.
9Fill the engine with the correct grade and
quantity of oil.
10Check the throttle cable adjustment.
11Fill the cooling system.
12Check and if necessary top-up the
transmission fluid level.
13Tighten all fixings to the specified torque,
where applicable.
Proceed as described in Chapter 2, Part C,
but note that on certain models it may be
necessary to unbolt the engine mounting
brackets from the cylinder block to allow
sufficient clearance to remove the mountings.
13Engine mountings - renewal
12Engine/automatic
transmission assembly -
reconnection and refitting
11Engine/manual gearbox
assembly - reconnection and
refitting
10Engine - refitting (automatic
transmission in vehicle)
9Engine - refitting (manual
gearbox in vehicle)
DOHC engine 2B•7
2B

26Insert the three smaller M8 cylinder head
bolts through the top of the timing case and
tighten them to the specified torque. Note that
new bolts must be used, and that they should
be of the latest type, with hexagonal heads
(see illustration).
27Lubricate the cam follower bores in the
cylinder head, and the cam followers
themselves, then insert the cam followers into
their original locations in the cylinder head.
28Lubricate the camshaft bearing surfaces
in the cylinder head, and the bearing caps.
29Lubricate the surfaces of the camshafts,
then carefully lay the camshafts in their
original positions in the cylinder head.
Position the camshafts with the slots in their
front ends pointing away from each other.
30Fit and tighten the bearing caps L1, L3,
L5, R1, R3, and R5 in the sequence shown
(see illustration)then lay the camshaft oil
spray bars and the timing chain guide plate in
position over the studs (see illustrations).
31Carefully tighten the bearing cap securing
nuts by hand in the following sequence to
lower the camshafts into position. Continue to
tighten the nuts in the sequence given, in
small amounts, until the bearing caps contact
the cylinder head.1Tighten the nuts for bearing caps L1 and
R1 by half-a-turn (180º)
2Tighten the nuts for bearing caps L5 and
R5 by half-a-turn (180º)
3Tighten the nuts for bearing caps L3 and
R3 by half-a-turn (180º)
32Fit bearing caps L2, L4, R2 and R4, and
tap them into position on the cylinder head
using light taps from a soft-faced mallet.
Tighten the securing nuts evenly by hand.
33Tighten all the bearing cap nuts to the
specified torque in half-turn stages, using the
following sequence:
1L1 and R1
2L5 and R5
3L3 and R3
4L2 and L4
5R2 and R4
34Fit a newchain tensioner plunger
assembly to the housing in the cylinder head
with the piston uppermost. Before fitting the
new plunger assembly, take note of the
position of the piston(see illustration). The
assembly is normally supplied with the piston
protruding slightly from the cylinder, or slightly
below the top surface of the cylinder (“A”). If
the new assembly is supplied with the piston
partially unlatched (“B”), or fully unlatched
with the latching ring visible (“C”), it must not
be used (see illustration).
35Locate the chain tensioner arm in
position, then insert the pivot pin, and secure
it with the circlip. Take care not to drop the
circlip into the timing-case.
36Release the cable-tie securing the timing
chain (if used), and lay the chain over the
exhaust camshaft sprocket, aligning the
marks made previously on the chain and
sprocket, so that the timing chain is taut on
the exhaust side of the engine.
37Fit the sprocket to the exhaust camshaft,
with the camshaft in the TDC position (ie with
the exhaust camshaft sprocket timing mark in
line with the top edge of the cylinder head,
pointing to the exhaust side of the engine -
see paragraph 4. If necessary, use a pair of
pliers on one of the unmachined sections of
the camshaft to turn the camshaft to the TDCposition. Take care not to damage the
machined surfaces of the camshaft.
38With the sprocket fitted, fit the spacer to
the end of the camshaft, and tighten the
securing bolt finger-tight (see illustration).
39Lay the timing chain over the inlet
camshaft sprocket, aligning the marks made
previously on the chain and the sprocket.
40Fit the sprocket to the inlet camshaft, with
the camshaft in the TDC position (ie with the
inlet camshaft sprocket timing mark in line
with the top edge of the cylinder head,
pointing to the inlet side of the engine - see
paragraph 4). Again, turn the camshaft if
necessary to enable the sprocket to be fitted.
41With the sprocket fitted, fit the distributor
rotor shaft to the end of the camshaft, and
tighten the securing bolt finger-tight. Note that
it is acceptable for the timing chain to sag
slightly between the two pulleys.
DOHC engine 2B•13
2B
18.30b Camshaft oil spray bars correctly
fitted
18.38 Spacer and sprocket securing bolt
fitted to end of camshaft, with camshaft in
TDC position (timing marks arrowed)
18.34 Timing chain tensioner plunger
assembly
A Piston retracted - plunger assembly
useable
B Piston partially unlatched - discard plunger
assembly
C Latching ring (1) visible - discard plunger
assembly
18.30c Fitting the timing chain guide plate
18.30a Camshaft bearing cap tightening
sequence (see text)18.26 Use new M8 (auxiliary) cylinder head
bolts with hexagonal heads (A), not earlier-
type Torx bolts (B)
Warning: Take care when
installing the plunger assembly,
as there is a risk of injury if the
piston flies out.

13Apply a suitable sealing compound to the
faces of the cylinder block and sump, at the
points indicated (see illustration).
14Locate the sump on the cylinder block,
then apply suitable thread-locking compound
to the sump securing studs and bolts. Fit the
securing nuts and bolts, but do not fully
tighten them at this stage.
15Align the sump so that its end faces and
the cylinder block are flush. To do this, use a
straight-edge. If the sump cannot be
positioned so that the faces of the cylinder
block and sump are flush, measure the
difference in height using a feeler blade as
shown (see illustration).
16Tighten the sump securing nuts and bolts
to the specified torque, then repeat the
measurement made in paragraph 15. If the
end faces of the sump and cylinder block are
not flush, suitable shims (available from a Ford
dealer) must be fitted between the sump and
the gearbox/transmission to eliminate the
clearance when mating the engine to the
gearbox/transmission. Note that shims should
be fitted at both sides of the sump, as
required. Select suitable shims from those
listed in the following table:
Clearance measuredShims required
0 to 0.25 mmNo shims required
0.25 to 0.29 mm0.15 mm (silver)
0.30 to 0.44 mm0.30 mm (light blue)
0.45 to 0.59 mm0.45 mm (red)
0.60 to 0.75 mm0.60 mm (black)
17If the engine is in the vehicle, proceed as
follows.
18Reverse the procedure described in
paragraphs 2 to 8, noting the following points.19Ensure that the roadwheels and the
steering wheel are in the straight-ahead
position before reconnecting the lower
steering column to the intermediate shaft.
20Fill the engine with the correct grade and
quantity of oil.
21Refit the engine adapter plate and the
flywheel/driveplate.
22Refit the gearbox or automatic
transmission, ensuring that the required shims
are fitted between the sump and the
gearbox/transmission.
23Tighten all fixings to the specified torque,
where applicable.
Note: A suitable puller will be required to
remove the crankshaft pulley. A new
crankshaft pulley bolt, a new lower timing
chain cover gasket, and a new oil pump
gasket, must be used on refitting.
Removal
1If the engine is in the car, carry out the
following operations:
a)Disconnect the battery negative lead.
b)To improve access, remove the radiator. It
will be difficult to remove the crankshaft
pulley with the radiator in place.
c)On fuel injection models, remove the air
inlet hose, plenum chamber, and air
cleaner lid as an assembly.
2Proceed as described in paragraphs 3 to 10
of Section 15.
3Unscrew the four securing bolts, and
withdraw the oil pump from the cylinder block
(see illustrations). Recover the gasket.
Refitting
4Thoroughly clean the mating faces of the
pump and the cylinder block.
5Prime the pump by injecting clean engine
oil into it and turning it by hand.
6Place a new gasket on the oil pump flange,
ensuring that the gasket is correctly located
so that its holes align with the oil passages in
the pump.
7Fit the oil pump, and tighten the securing
bolts to the specified torque.8Proceed as shown in paragraphs 27 to 39
of Section 15.
9If the engine is in the vehicle, reverse the
operations described in paragraph 1.
Dismantling
1The oil pump can be dismantled for
cleaning, but if any of the components are
worn, the pump must be renewed as an
assembly.
2To dismantle the pump, proceed as follows.
3Unscrew the two securing bolts, and
remove the pump cover (see illustration).
4Lift the inner and outer rotors from the
pump casing.
27Oil pump - dismantling,
inspection and reassembly
26Oil pump - removal and
refitting
2B•16DOHC engine
25.13 Apply sealing compound to the
sump/cylinder block mating faces at the
points indicated (2)
Dimensions are for guidance only
26.3b Withdrawing the oil pump
26.3a Oil pump securing bolts (arrowed)25.15 Measuring the clearance between
the cylinder block and sump end faces
27.3 Removing the oil pump cover

6Before removing the crankshaft, check that
the endfloat is within the specified limits by
inserting a feeler blade between the centre
crankshaft web and one of the thrustwashers
(the thrustwashers are fitted to the crankcase,
not the bearing cap). This will indicate whether
or not new thrustwashers are required.
7Unscrew the bolts, and tap off the main
bearing caps complete with bearing shells.
8Lift the crankshaft from the cylinder block,
and remove the rear oil seal if it is still in place
on the crankshaft.
9Extract the bearing shells, and recover the
thrustwashers, keeping them identified for
location.
Refitting
10Commence refitting as follows(see
illustration).
11Wipe the bearing shell locations in the
crankcase, and the crankshaft journals with a
soft non-fluffy rag.
12If the old main bearing shells are to be
renewed (not to do so is a false economy,
unless they are virtually new) fit the five upper
halves of the main bearing shells to their
locations in the crankcase.
13Fit the thrustwashers to the centre main
bearing location, using a little grease to retain
them if necessary. The oil grooves in the
thrustwashers must face outwards (ie facing
the crankshaft webs). Note that where
standard thrustwashers have been fitted in
production, the centre main bearing is
unmarked. If oversize (0.38 mm)
thrustwashers have been fitted, the centre
main bearing will carry a yellow paint mark.
14Lubricate the crankshaft journals and the
upper and lower main bearing shells with
clean engine oil, then carefully lower the
crankshaft into the crankcase.
15Lubricate the crankshaft main bearing
journals again, and then fit the main bearing
caps in their correct locations, with the arrows
on the caps pointing to the front of the engine.16Fit the main bearing cap bolts, noting that
the studded bolts secure bearing caps Nos 3
and 5.
17Lightly tighten all the securing bolts, then
progressively tighten all bolts to the specified
torque.
18Check that the crankshaft rotates freely.
Some stiffness is to be expected with new
components, but there must be no tight spots
or binding.
19Check that the crankshaft endfloat is
within the specified limits by inserting a feeler
blade between the centre crankshaft web and
the thrustwashers.
20Refit the sump mounting plate to the front
of the cylinder block, and tighten the securing
bolts to the specified torque.
21Carefully wind a thin layer of tape around
the rear edge of the crankshaft, to protect the
oil seal lips as the rear oil seal is installed.
22Refit the crankshaft rear oil seal housing,
using a new gasket, and tighten the securing
bolts to the specified torque.
23Ideally, the new oil seal should be
installed using a tool similar to that used for
fitting the crankshaft rear oil seal. A suitable
tool can be improvised using a metal tube of
suitable diameter, a metal disc or flat bar, and
two flywheel bolts. Draw the seal into position
using the two flywheel bolts. Make sure that
the seal lip faces into the engine.
24With the oil seal installed, carefully pull the
tape from the edge of the crankshaft.
25Refit the pistons and connecting rods.
26Refit the flywheel/driveplate, and the
timing chain and crankshaft sprocket.1Proceed as described in Chapter 2, PartA,
noting the following.
2Production bearing undersizes are
indicated as follows:
Yellow or red paint marks on crankshaft -
standard-diameter main bearing journals.
Green line on crankshaft front counterweight
- main bearing journals 0.25 mm
undersize.
Green spot on counterweight - big-end
bearing journals 25 mm undersize.
1Refer to Chapter 2, PartA, but note that
when the engine is first started, a metallic
tapping noise may be heard. This is due to the
timing chain tensioner plunger assembly
taking time to pressurise with oil, resulting in a
temporarily slack chain. The noise should
stop after a short time, once oil pressure has
built up.
32Initial start-up after overhaul or
major repair
31Crankshaft and bearings -
examination and renovation
2B•18DOHC engine
30.5 Main bearing cap identification mark
(arrowed)
30.10 Crankshaft main bearings and associated components
1 Bearing cap
2 Thrustwasher
3 Stud for oil baffle4 Identification markings
5 Bearing shell without oil
groove6 Bearing shell with oil
groove
7 Bearing seat in cylinder
block