1993 FORD MONDEO engine oil

and right-hand mountings. Do not yet
release the hoist; the weight of the
engine/transmission unit must not be
taken by the mountings until all are
correctly aligned.
(d) Fitting the Ford service tool in place of the
front mounting, tighten the
engine/transmission mounting fasteners
to their specified torque wrench settings,
and in the sequence described in Part B
of this Chapter, Section 4, paragraphs 49
and 50.
(e) Refill the cooling system (see Chapter 1).
(f) Refill the engine with oil, remembering
that you are advised to fit a new filter (see
Chapter 1).
(g) Check for signs of oil or coolant leaks
once the engine has been restarted and
warmed-up to normal operating
temperature.
Removal
Note:While this task is theoretically possible
when the engine is in place in the vehicle, in
practice, it requires so much preliminary
dismantling, and is so difficult to carry out due
to the restricted access, that owners are
advised to remove the engine from the vehicle
first. Note, however, that the oil pumppressure relief valve can be removed with the
engine in situ - see paragraph 8.
In addition to the new pump gasket and
other replacement parts required, read
through Section 15, and ensure that the
necessary tools and facilities are available.
1Remove the timing belt (see Section 10).
2Withdraw the crankshaft toothed pulley
and the thrustwasher behind it, noting which
way round the thrustwasher is fitted (see
Section 11).
3Remove the sump (see Section 15).
4Undo the screws securing the oil pump
pick-up/strainer pipe to the pump, then
unscrew the nut and withdraw the oil pump
pick-up/strainer pipe. Discard the gasket.
5Unbolt the pump from the cylinder
block/crankcase (see illustration). Withdraw
and discard the gasket, and remove the
crankshaft right-hand oil seal. Thoroughly
clean and degrease all components,
particularly the mating surfaces of the pump,
the sump, and the cylinder block/crankcase.
Inspection
6Unscrew the Torx screws, and remove the
pump cover plate; noting any identification
marks on the rotors, withdraw the rotors (see
illustration).
7Inspect the rotors for obvious signs of wear
or damage, and renew if necessary; if either
rotor, the pump body, or its cover plate are
scored or damaged, the complete oil pump
assembly must be renewed.
8The oil pressure relief valve can bedismantled, if required, without disturbing the
pump. With the vehicle parked on firm level
ground, apply the handbrake securely and
raise its front end, supporting it securely on
axle stands. Remove the front right-hand
roadwheel and auxiliary drivebelt cover (see
Chapter 1) to provide access to the valve.
9Unscrew the threaded plug, and recover
the valve spring and plunger (see
illustrations). If the plug’s sealing O-ring is
worn or damaged, a new one must be
obtained, to be fitted on reassembly.
10Reassembly is the reverse of the
dismantling procedure; ensure the spring and
valve are refitted the correct way round, and
tighten the threaded plug securely.
Refitting
11The oil pump must be primed on
installation, by pouring clean engine oil into it,
and rotating its inner rotor a few turns.
12Using grease to stick the new gasket in
place on the cylinder block/crankcase, and
rotating the pump’s inner rotor to align with
the flats on the crankshaft, refit the pump and
insert the bolts, tightening them lightly at first
(see illustration).
13Using a suitable straight edge and feeler
gauges, check that the pump is both centred
exactlyaround the crankshaft, and aligned
squarely so that its (sump) mating surface is
exactly the same amount - between 0.3 and
0.8 mm - below that of the cylinder block/
crankcase on each side of the crankshaft
(see illustration). Being careful not to disturb
16 Oil pump - removal,
inspection and refitting
In-car engine repair procedures 2A•21
2A
16.9B . . . to withdraw oil pressure relief
valve spring and plunger16.12 Use new gasket when refitting oil
pump16.13 Check the oil pump is positioned
correctly
16.5 Unscrew bolts (arrowed) to remove
oil pump16.6 Withdrawing oil pump inner rotor16.9A Unscrew threaded plug - seen
through right-hand wheel arch . . .
procarmanuals.com

the gasket, move the pump into the correct
position, and tighten its bolts to the specified
torque wrench setting.
14Check that the pump is correctly located;
if necessary, unbolt it again, and repeat the
full procedure to ensure that the pump is
correctly aligned.
15Fit a new crankshaft right-hand oil seal
(see Section 20).
16Using grease to stick the gasket in place
on the pump, refit the pick-up/strainer pipe,
tightening its screws and nut to their specified
torque wrench settings (see illustration).
17The remainder of reassembly is the
reverse of the removal procedure, referring to
the relevant text for details where required.
1Drain the cooling system (see Chapter 1).
Disconnect the coolant hoses from the oil
cooler.
2Unscrew the oil filter (see Chapter 1) -
catch any escaping oil in a drip tray.
3Unscrew the filter adaptor from the oil
pump, and withdraw the oil cooler; note how
its unions are aligned, and be prepared for oil
loss from the cooler.
4Refitting is the reverse of the removal
procedure, noting the following points:(a) Renew all O-rings and seals disturbed on
removal.
(b) Align the cooler’s unions as noted on
removal, and tighten the adaptor to the
specified torque wrench setting.
(c) Refill the cooling system (see Chapter 1).
(d) Refit the oil filter, then check the engine
oil level, and top-up as necessary (see
Chapter 1).
(e) Check for signs of oil or coolant leaks once
the engine has been restarted and warmed-
up to normal operating temperature.
1With the vehicle parked on firm level
ground, open the bonnet and disconnect the
battery negative (earth) lead - see Chapter 5,
Section 1.
2Raise the front of the vehicle, and support it
securely on axle stands.
3Undo the two screws, and remove the
sensor’s cover from the front of the sump
(see illustration).
4Unplug the wiring from the sensor (see
illustration). Where necessary, unplug the
electrical connector to disconnect the sensor
wiring, and unclip the connector to release
the wiring from the vehicle.
5Unscrew the sensor, and quickly plug the
sump aperture to minimise oil loss; note the
sensor’s seal.6Refitting is the reverse of the removal
procedure; renew the sensor’s seal if it is
worn or damaged, and tighten the sensor to
the specified torque wrench setting. Check
the engine oil level, and top-up as necessary
(see Chapter 1) - check for signs of oil leaks
once the engine has been restarted and
warmed-up to normal operating temperature.
1The switch is screwed into the rear of the
cylinder block, above the right-hand
driveshaft’s support bearing (see
illustration).
2With the vehicle parked on firm level
ground, open the bonnet and disconnect the
battery negative (earth) lead - see Chapter 5,
Section 1.
3Raise the front of the vehicle, and support it
securely on axle stands.
4Unplug the wiring from the switch, and
unscrew it; be prepared for some oil loss.
5Refitting is the reverse of the removal
procedure; apply a thin smear of suitable
sealant to the switch threads, and tighten it to
the specified torque wrench setting. Check
the engine oil level, and top-up as necessary
(see Chapter 1). Check for signs of oil leaks
once the engine has been restarted and
warmed-up to normal operating temperature.
Note:Don’t try to prise these seals out
without removing the oil pump or seal carrier -
the seals are too soft, and the amount of
space available is too small, for this to be
possible without considerable risk of damage
to the seal housing and/or the crankshaft
journal. Follow exactly the procedure given
below.
Right-hand seal
1Remove the oil pump (see Section 16).
2Drive the oil seal out of the pump from
behind (see illustration).
20 Crankshaft oil seals -
renewal
19 Oil pressure warning light
switch - removal and refitting
18 Oil level sensor-
removal and refitting
17 Oil cooler -
removal and refitting
2A•22 In-car engine repair procedures
16.16 Use new gasket when refitting oil
pick-up pipe to pump18.3 Remove screws (arrowed) to remove
oil level sensor cover . . .18.4 . . . disconnecting wiring from sensor
19.1 Oil pressure warning light switch
(arrowed) is screwed into rear of cylinder
block, above right-hand driveshaft support
bearing
20.2 Driving out crankshaft right-hand oil
seal
procarmanuals.com

3Clean the seal housing and crankshaft,
polishing off any burrs or raised edges, which
may have caused the seal to fail in the first
place.
4Refit the oil pump (see Section 16). Grease
the lips and periphery of the new seal, to ease
installation.
5To fit a new seal, Ford recommend the use
of their service tool 21-093A, with the
crankshaft pulley bolt, to draw the seal into
place; an alternative can be arranged using a
socket of suitable size, with a washer to
match the crankshaft pulley bolt (see
illustration).
6If such tools are not available, press the
seal squarely into place by hand; tap it in until
it is flush with the pump housing, using a soft-
faced mallet and a socket with an outside
diameter only slightly smaller than the seal’s
(see illustration). This approach requires
great care, to ensure that the seal is fitted
squarely, without distortion or damage.
7Wash off any traces of oil. The remainder of
reassembly is the reverse of the removal
procedure, referring to the relevant text for
details where required. Check for signs of oil
leakage when the engine is restarted.
Left-hand seal
8Remove the transmission (see the relevant
Part of Chapter 7).
9Where appropriate, remove the clutch
(Chapter 8).
10Unbolt the flywheel/driveplate (see
Section 21).11Remove the sump (see Section 15).
12Unbolt the oil seal carrier (see
illustration). Remove and discard its gasket.
13Supporting the carrier evenly on wooden
blocks, drive the oil seal out of the carrier
from behind (see illustration).
14Clean the seal housing and crankshaft,
polishing off any burrs or raised edges, which
may have caused the seal to fail in the first
place. Clean also the mating surfaces of the
cylinder block/crankcase and carrier, using a
scraper to remove all traces of the old gasket
- be careful not to scratch or damage the
material of either - then use a suitable solvent
to degrease them.
15Use grease to stick the new gasket in
place on the cylinder block/crankcase, then
offer up the carrier (see illustration).
16Using a suitable straight edge and feeler
gauges, check that the carrier is both centred
exactlyaround the crankshaft, and aligned
squarely so that its (sump) mating surface is
exactly the same amount - between 0.3 and
0.8 mm - below that of the cylinder
block/crankcase on each side of the
crankshaft. Being careful not to disturb the
gasket, move the carrier into the correct
position, and tighten its bolts to the specified
torque wrench setting (see illustration).
17Check that the carrier is correctly located;
if necessary, unbolt it again, and repeat the
full procedure to ensure that the carrier is
correctly aligned.
18Ford’s recommended method of seal
fitting is to use service tool 21-141, with twoflywheel bolts to draw the seal into place. If
this is not available, make up a guide from a
thin sheet of plastic or similar, lubricate the
lips of the new seal and the crankshaft
shoulder with grease, then offer up the seal,
with the guide feeding the seal’s lips over the
crankshaft shoulder (see illustration). Press
the seal evenly into its housing by hand only,
and use a soft-faced mallet gently to tap it
into place until it is flush with the surrounding
housing.
19Wipe off any surplus oil or grease; the
remainder of the reassembly procedure is the
reverse of dismantling, referring to the
relevant text for details where required.
Check for signs of oil leakage when the
engine is restarted.
In-car engine repair procedures 2A•23
2A
20.15 Use new gasket when refitting left-
hand oil seal carrier20.16 Check the oil seal carrier is correctly
positioned20.18 Using guide made from thin sheet of
plastic to slide oil seal lips over crankshaft
shoulder
20.5 Socket of correct size can be used to
replace Ford service tool, drawing new
seal into place as described20.6 If seal is tapped into place as shown,
exercise great care to prevent seal from
being damaged or distorted20.12 Unscrew bolts (arrowed) to remove
crankshaft left-hand oil seal carrier . . .
20.13 . . . and ensure that carrier is
properly supported when driving out used
oil seal - note notches provided in carrier
for drift
procarmanuals.com

Removal
1Remove the transmission (see the relevant
Part of Chapter 7). Now is a good time to
check components such as oil seals and
renew them if necessary.
2Where appropriate, remove the clutch
(Chapter 8). Now is a good time to check or
renew the clutch components and pilot
bearing.
3Use a centre-punch or paint to make
alignment marks on the flywheel/driveplate
and crankshaft, to ensure correct alignment
during refitting.
4Prevent the flywheel/driveplate from
turning by locking the ring gear teeth, or by
bolting a strap between the flywheel/
driveplate and the cylinder block/
crankcase. Slacken the bolts evenly until all
are free.
5Remove each bolt in turn, and ensure that
new replacements are obtained for
reassembly; these bolts are subjected to
severe stresses, and so must be renewed,
regardless of their apparent condition,
whenever they are disturbed.
6Noting the reinforcing plate (automatic
transmission-equipped models only),
withdraw the flywheel/driveplate; do not drop
it - it is very heavy.
Inspection
7Clean the flywheel/driveplate to remove
grease and oil. Inspect the surface for cracks,
rivet grooves, burned areas and score marks.
Light scoring can be removed with emery
cloth. Check for cracked and broken ring gear
teeth. Lay the flywheel/driveplate on a flat
surface, and use a straight edge to check for
warpage.
8Clean and inspect the mating surfaces of
the flywheel/driveplate and the crankshaft. If
the crankshaft left-hand seal is leaking, renew
it (see Section 20) before refitting the
flywheel/driveplate.
9While the flywheel/driveplate is removed,clean carefully its inboard (right-hand) face,
particularly the recesses which serve as the
reference points for the crankshaft
speed/position sensor. Clean the sensor’s tip,
and check that the sensor is securely
fastened.
Refitting
10On refitting, ensure that the
engine/transmission adaptor plate is in place
(where necessary), then fit the
flywheel/driveplate to the crankshaft so that
all bolt holes align - it will fit only one way -
check this using the marks made on removal.
Do not forget the reinforcing plate (where
fitted).
11Lock the flywheel/driveplate by the
method used on dismantling. Working in a
diagonal sequence to tighten them evenly,
and increasing to the final amount in two or
three stages, tighten the new bolts to the
specified torque wrench setting (see
illustration).
12The remainder of reassembly is the
reverse of the removal procedure, referring to
the relevant text for details where required.
General
1The engine/transmission mountings
seldom require attention, but broken or
deteriorated mountings should be renewed
immediately, or the added strain placed on
the driveline components may cause damage
or wear.
2While separate mountings may be removed
and refitted individually, if more than one is
disturbed at a time - such as if theengine/transmission unit is removed from its
mountings - they must be reassembled and
their fasteners tightened in a strict sequence.
3On reassembly, the weight of the
engine/transmission unit must not be taken
by the mountings until all are correctly
aligned. Fitting the Ford service tool in place
of the front mounting, tighten the
engine/transmission mounting fasteners to
their specified torque wrench settings, and in
the sequence described in Part B of this
Chapter, Section 4, paragraphs 49 and 50.
Inspection
4During the check, the engine/transmission
unit must be raised slightly, to remove its
weight from the mountings.
5Raise the front of the vehicle, and support it
securely on axle stands. Position a jack under
the sump, with a large block of wood
between the jack head and the sump, then
carefully raise the engine/transmission just
enough to take the weight off the mountings.
Warning: DO NOT place any part
of your body under the engine
when it is supported only by a
jack!
6Check the mountings to see if the rubber is
cracked, hardened or separated from the
metal components. Sometimes the rubber
will split right down the centre.
7Check for relative movement between each
mounting’s brackets and the engine/
transmission or body (use a large screwdriver
or lever to attempt to move the mountings). If
movement is noted, lower the engine and
check-tighten the mounting fasteners.
Renewal
Front mounting
8Unbolt the resonator support bracket from
the engine compartment front crossmember,
slacken the two clamp screws securing the
22 Engine/transmission
mountings -
inspection and renewal
21 Flywheel/driveplate -
removal, inspection and refitting
2A•24 In-car engine repair procedures
21.11 Note method used to lock
flywheel/driveplate while (new) bolts are
tightened
22.8 Engine/transmission front mounting - manual transmission shown, automatic
equivalent similar
1 Transmission 3 Mounting 5 Mounting centre bolt
2 Mounting bracket 4 Front suspension subframe
procarmanuals.com

Pistons and piston rings
Piston diameter - 1.6 litre engine:
Class 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75.975 to 75.985 mm
Class 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75.985 to 75.995 mm
Class 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75.995 to 76.005 mm
Piston diameter - 1.8 litre engine:
Class 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80.570 to 80.580 mm
Class 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80.580 to 80.590 mm
Class 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80.590 to 80.600 mm
Piston diameter - 2.0 litre engine:
Class 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84.770 to 84.780 mm
Class 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84.780 to 84.790 mm
Class 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84.790 to 84.800 mm
Oversizes - all engines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . None available
Piston-to-cylinder bore clearance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No information available at time of writing
Piston ring end gaps - installed:
Top compression ring - 1.6 and 1.8 litre engines . . . . . . . . . . . . . . . . 0.30 to 0.50 mm
Top compression ring - 2.0 litre engine . . . . . . . . . . . . . . . . . . . . . . . 0.26 to 0.50 mm
Second compression ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.30 to 0.50 mm
Oil control ring - 1.6 litre engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.25 to 1.00 mm
Oil control ring - 1.8 litre engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.38 to 1.14 mm
Oil control ring - 2.0 litre engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.40 to 1.40 mm
Gudgeon pin
Diameter:
White colour code/piston crown marked “A” . . . . . . . . . . . . . . . . . . . 20.622 to 20.625 mm
Red colour code/piston crown marked “B” . . . . . . . . . . . . . . . . . . . . 20.625 to 20.628 mm
Blue colour code/piston crown marked “C” . . . . . . . . . . . . . . . . . . . . 20.628 to 20.631 mm
Clearance in piston . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.010 to 0.016 mm
Connecting rod small-end eye internal diameter . . . . . . . . . . . . . . . . . . 20.589 to 20.609 mm
Interference fit in connecting rod . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.011 to 0.042 mm
Crankshaft and bearings
Main bearing shell standard inside diameter - installed . . . . . . . . . . . . 58.011 to 58.038 mm
Main bearing journal standard diameter . . . . . . . . . . . . . . . . . . . . . . . . 57.980 to 58.000 mm
Main bearing journal-to-shell running clearance . . . . . . . . . . . . . . . . . . 0.011 to 0.058 mm
Main bearing shell undersizes available . . . . . . . . . . . . . . . . . . . . . . . . . 0.02 mm, 0.25 mm
Big-end bearing shell standard inside diameter - installed . . . . . . . . . . . 46.926 to 46.960 mm
Crankpin (big-end) bearing journal standard diameter . . . . . . . . . . . . . 46.890 to 46.910 mm
Crankpin (big-end) bearing journal-to-shell running clearance . . . . . . . . 0.016 to 0.070 mm
Big-end bearing shell undersizes available . . . . . . . . . . . . . . . . . . . . . . 0.02 mm, 0.25 mm
Crankshaft endfloat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.090 to 0.310 mm
Torque wrench settingsNm lbf ft
Main bearing cap bolts and nuts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80 59
Big-end bearing cap bolts:
Stage 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 13
Stage 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Angle-tighten a further 90°
Piston-cooling oil jet/blanking plug Torx screws . . . . . . . . . . . . . . . . . . 10 7
Cylinder block and head oilway blanking plugs:
M6 x 10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 to 11 6 to 8
M10 x 11.5 - in block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 17
1/4 PTF plug - in block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 18
Power steering pump/air conditioning compressor mounting
bracket-to-cylinder block bolts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 35
Exhaust manifold heat shield mounting bracket-to-cylinder
block bolts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 24
Crankcase breather system:
Oil separator-to-cylinder block bolts . . . . . . . . . . . . . . . . . . . . . . . . . 10 7
Pipe-to-cylinder head bolt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 17
Water pump bolts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Chapter 3
Driveshaft support bearing bracket-to-cylinder block bolts . . . . . . . . . . 48 35
Transmission-to-engine bolts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Part A of this Chapter
Engine/transmission mounting fasteners . . . . . . . . . . . . . . . . . . . . . . . . See Part A of this Chapter
Front suspension subframe bolts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130 96
Note:Refer to Part A of this Chapter for remaining torque wrench settings.
2B•2 Engine removal and general engine overhaul procedures
procarmanuals.com

How to use this Chapter
This Part of Chapter 2 is devoted to
engine/transmission removal and refitting, to
those repair procedures requiring the removal
of the engine/transmission from the vehicle,
and to the overhaul of engine components. It
includes only the Specifications relevant to
those procedures. Refer to Part A for
additional Specifications, if required.
General information
The information ranges from advice
concerning preparation for an overhaul and
the purchase of replacement parts, to detailed
step-by-step procedures covering removal
and installation of internal engine components
and the inspection of parts.
The following Sections have been written
based on the assumption that the engine has
been removed from the vehicle. For
information concerning in-vehicle engine
repair, as well as removal and installation of
the external components necessary for the
overhaul, see Part A of this Chapter and
Section 5 of this Part.
When overhauling this engine, it is essential
to establish first exactly what replacement
parts are available. At the time of writing,
components such as the piston rings are not
available separately from the
piston/connecting rod assemblies; pistons,
gudgeon pins and valve guides are not
available separately, and very few under- or
oversized components are available for
engine reconditioning. In most cases, it would
appear that the easiest and most
economically-sensible course of action is to
replace a worn or damaged engine with an
exchange unit.
It’s not always easy to determine when, or
if, an engine should be completely
overhauled, as a number of factors must be
considered.
High mileage is not necessarily an
indication that an overhaul is needed, while
low mileage doesn’t preclude the need for an
overhaul. Frequency of servicing is probably
the most important consideration. An engine
that’s had regular and frequent oil and filter
changes, as well as other required
maintenance, will most likely give many
thousands of miles of reliable service.
Conversely, a neglected engine may require
an overhaul very early in its life.
Excessive oil consumption is an indication
that piston rings, valve seals and/or valve
guides are in need of attention. Make surethat oil leaks aren’t responsible before
deciding that the rings and/or guides are
worn. Perform a cylinder compression check
(Part A of this Chapter, Section 3) to
determine the extent of the work required.
Loss of power, rough running, knocking or
metallic engine noises, excessive valve train
noise and high fuel consumption rates may
also point to the need for an overhaul,
especially if they’re all present at the same
time. If a full service doesn’t remedy the
situation, major mechanical work is the only
solution.
An engine overhaul involves restoring all
internal parts to the specification of a new
engine. Note:Always check first what
replacement parts are available before
planning any overhaul operation; refer to
Section 1 of this Part. Ford dealers, or a good
engine reconditioning specialist/automotive
parts supplier may be able to suggest
alternatives which will enable you to overcome
the lack of replacement parts.
During an overhaul, it is usual to renew the
piston rings, and to rebore and/or hone the
cylinder bores; where the rebore is done by an
automotive machine shop, new oversize
pistons and rings will also be installed - all
these operations, of course, assume the
availability of suitable replacement parts. The
main and big-end bearings are generally
renewed and, if necessary, the crankshaft
may be reground to restore the journals.
Generally, the valves are serviced as well,
since they’re usually in less-than-perfect
condition at this point. While the engine is
being overhauled, other components, such as
the starter and alternator, can be renewed as
well, or rebuilt, if the necessary parts can be
found. The end result should be an as-new
engine that will give many trouble-free miles.
Note:Critical cooling system components
such as the hoses, drivebelt, thermostat and
water pump MUST be replaced with new
parts when an engine is overhauled. The
radiator should be checked carefully, to
ensure that it isn’t clogged or leaking (see
Chapter 3). Also, as a general rule, the oil
pump should be renewed when an engine is
rebuilt.
Before beginning the engine overhaul, read
through the entire procedure to familiarise
yourself with the scope and requirements of
the job. Overhauling an engine isn’t difficult,
but it is time-consuming. Plan on the vehicle
being off the road for a minimum of two
weeks, especially if parts must be taken to an
automotive machine shop for repair or
reconditioning. Check on availability of parts,
and make sure that any necessary special
tools and equipment are obtained in advance.
Most work can be done with typical hand
tools, although a number of precision
measuring tools are required, for inspecting
parts to determine if they must be replaced.
Often, an automotive machine shop will
handle the inspection of parts, and will offer
advice concerning reconditioning andreplacement. Note:Always wait until the
engine has been completely dismantled, and
all components, especially the cylinder
block/crankcase, have been inspected, before
deciding what service and repair operations
must be performed by an automotive machine
shop. Since the block’s condition will be the
major factor to consider when determining
whether to overhaul the original engine or buy
a rebuilt one, never purchase parts or have
machine work done on other components
until the cylinder block/crankcase has been
thoroughly inspected.As a general rule, time
is the primary cost of an overhaul, so it
doesn’t pay to install worn or sub-standard
parts.
As a final note, to ensure maximum life and
minimum trouble from a rebuilt engine,
everything must be assembled with care, in a
spotlessly-clean environment.
If you’ve decided that an engine must be
removed for overhaul or major repair work,
several preliminary steps should be taken.
Locating a suitable place to work is
extremely important. Adequate work space,
along with storage space for the vehicle, will
be needed. If a workshop or garage isn’t
available, at the very least, a flat, level, clean
work surface made of concrete or asphalt is
required.
Cleaning the engine compartment and
engine/transmission before beginning the
removal procedure will help keep tools clean
and organized.
The engine can only be withdrawn by
removing it complete with the transmission;
the vehicle’s body must be raised and
supported securely, sufficiently high that the
engine/transmission can be unbolted as a
single unit and lowered to the ground; the
engine/transmission unit can then be
withdrawn from under the vehicle and
separated. An engine hoist or A-frame will
therefore be necessary. Make sure the
equipment is rated in excess of the combined
weight of the engine and transmission. Safety
is of primary importance, considering the
potential hazards involved in removing the
engine/transmission from the vehicle.
If this is the first time you have removed an
engine, a helper should ideally be available.
Advice and aid from someone more
experienced would also be helpful. There are
many instances when one person cannot
simultaneously perform all of the operations
required when removing the engine/
transmission from the vehicle.
Plan the operation ahead of time. Arrange for,
or obtain, all of the tools and equipment you’ll
need prior to beginning the job. Some of the
equipment necessary to perform
engine/transmission removal and installation
3 Engine/transmission removal -
methods and precautions
2 Engine overhaul -
general information
1 General information
Engine removal and general engine overhaul procedures 2B•3
2B
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safely and with relative ease, and which may
have to be hired or borrowed, includes (in
addition to the engine hoist) a heavy-duty trolley
jack, a strong pair of axle stands, some wooden
blocks, and an engine dolly (a low, wheeled
platform capable of taking the weight of the
engine/transmission, so that it can be moved
easily when on the ground). A complete set of
spanners and sockets (as described in the front
of this manual) will obviously be needed,
together with plenty of rags and cleaning
solvent for mopping-up spilled oil, coolant and
fuel. If the hoist is to be hired, make sure that
you arrange for it in advance, and perform all of
the operations possible without it beforehand.
This will save you money and time.
Plan for the vehicle to be out of use for
quite a while. A machine shop will be required
to perform some of the work which the do-it-
yourselfer can’t accomplish without special
equipment. These establishments often have
a busy schedule, so it would be a good idea
to consult them before removing the engine,
to accurately estimate the amount of time
required to rebuild or repair components that
may need work.
Always be extremely careful when removing
and installing the engine/transmission.
Serious injury can result from careless
actions. By planning ahead and taking your
time, the job (although a major task) can be
accomplished successfully.
Warning: Petrol is extremely
flammable, so take extra
precautions when disconnecting
any part of the fuel system. Don’t
smoke, or allow naked flames or bare light
bulbs in or near the work area, and don’t
work in a garage where a natural gas
appliance (such as a clothes dryer or water
heater) is installed. If you spill petrol on
your skin, rinse it off immediately. Have a
fire extinguisher rated for petrol fires
handy, and know how to use it.Note: Read through the entire Section, as well
as reading the advice in the preceding Section,
before beginning this procedure. The engine
and transmission are removed as a unit,
lowered to the ground and removed from
underneath, then separated outside the vehicle.
Removal
1Park the vehicle on firm, level ground, apply
the handbrake firmly, and slacken the nuts
securing both front roadwheels.
2Relieve the fuel system pressure (see
Chapter 4).
3Disconnect the battery negative (earth) lead
- see Chapter 5, Section 1. For better access
the battery may be removed completely (see
Chapter 5).
4Place protective covers on the wings and
engine compartment front crossmember, then
remove the bonnet (see Chapter 11).
5Whenever you disconnect any vacuum
lines, coolant and emissions hoses, wiring
loom connectors, earth straps and fuel lines
as part of the following procedure, always
label them clearly, so that they can be
correctly reassembled.
6Unplug the two electrical connectors,disconnect the vacuum hose (where fitted)
and disconnect the crankcase breather hose
from the cylinder head cover, then remove the
complete air cleaner assembly, with the air
mass meter, the resonator and the plenum
chamber (see Chapter 4).
7Equalise the pressure in the fuel tank by
removing the filler cap, then undo the fuel
feed and return lines connecting the engine to
the chassis (see Chapter 4). Plug or cap all
open fittings (see illustration).
8Disconnect the accelerator cable from the
throttle linkage as described in Chapter 4 -
where fitted, also disconnect the cruise
control actuator cable (see Chapter 12).
Secure the cable(s) clear of the
engine/transmission.
9Releasing its wire clip, unplug the power
steering pressure switch electrical connector,
then unbolt the power steering high-pressure
pipe and the earth lead from the cylinder head
rear support plate/engine lifting eye (see
illustrations).
10Marking or labelling all components as
they are disconnected (see paragraph 5
above), disconnect the vacuum hoses as
follows:
4 Engine/transmission -
removal and refitting
2B•4 Engine removal and general engine overhaul procedures
4.7 Note colour-coding of unions when
disconnecting fuel feed and return lines4.9A Unplug the power steering pressure
switch electrical connector . . .4.9B . . . unbolt the power steering high-
pressure pipe . . .
Whenever any wiring is disconnected, . . . vacuum hoses and pipes should
mark or label it as shown, to ensure be similarly marked
correct reconnection . . .
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.
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(a) One from the rear of the throttle housing
(only the one hose - there is no need to
disconnect the second hose running to
the fuel pressure regulator) (see
illustration).
(b) One from the union on the inlet manifold’s
left-hand end (see illustration).
(c) The braking system vacuum servo unit
hose - from the inlet manifold (see
Chapter 9 for details).
(d) Also disconnect the vacuum hoses from
the Exhaust Gas Recirculation system
components - one from the EGR valve,
two from the EGR pipe (note that these
last two are of different sizes, as are their
pipe stubs, so that they can only be
connected the correct way round).
(e) While you are there, trace the vacuum line
from the pulse-air filter housing over the
top of the transmission, and disconnect it
by pulling the plastic pipe out of the
rubber hose just beneath the bulkhead-
mounted pulse-air solenoid valve (see
illustration).
(f) Secure all these hoses so that they won’t
get damaged as the engine/transmission
is removed.
11Unbolt the engine/transmission-to-body
earth lead from the transmission’s top surface
(see illustration). Disconnect the speed-
ometer drive cable (see Chapter 12) and
secure it clear of the engine/transmission.
12Where the vehicle is fitted with manual
transmission, disconnect the clutch cable (seeChapter 8). Where automatic transmission is
fitted, disconnect the selector cable (see
Chapter 7, Part B). Secure the cable clear of
the engine/transmission.
13Marking or labelling all components as
they are disconnected (see paragraph 5
above), disconnect the engine wiring loom
from the body as follows:
(a) Starting at the left-hand side of the engine
compartment, release and unplug the
three large electrical connectors clipped
to the suspension mounting - note the
wire clips fitted to some connectors (see
illustration).
(b) Disconnect and/or release the battery-to-
starter motor wiring, noting the single
connector which must be unplugged.
(c) Unplug the electrical connector(s) to
disconnect the vehicle speed sensor,
oxygen sensor and, where fitted, the oil
level sensor wiring - unclip the connectors
to release the wiring where necessary.
(d) Work along the loom to the bulkhead,
unclipping the loom and unplugging the
various bulkhead-mounted components
connected into it, until you reach the
right-hand side of the engine
compartment (see illustration).
(e) Carefully prise the power steering fluid
reservoir upwards out of its clip on the
suspension mounting, then unscrew the
ECU connector’s retaining bolt and
unplug the connector (see illustration).
(f) Unbolt the earth lead from the right-hand
Engine removal and general engine overhaul procedures 2B•5
2B
4.13A Unplug three large electrical
connectors (arrowed) . . .4.13B . . . unplug engine wiring loom from
battery wiring and bulkhead components
(arrowed) . . .4.13C . . . and disconnect ECU wiring and
earth lead (arrowed) to release engine
wiring loom from vehicle body
4.9C . . . and the earth lead from the
cylinder head rear support plate/engine
lifting eye4.10A Disconnect vacuum hose shown
from rear of throttle housing . . .4.10B . . . vacuum hose (arrowed) from
union on left-hand end on inlet manifold . . .
4.10C . . . also brake servo hose (A), EGR
valve hose (B), EGR pipe hoses (C) - noting
their different sizes - and pulse-air filter
vacuum line (D)
4.11 Unbolt the engine/transmission-to-
body earth lead - hidden behind wiring
loom guide - from location (arrowed) on
the transmission’s top surface
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