engine FIAT TEMPRA 1988 Service And Workshop Manual

G Step 6: Fit the four or five smaller bolts, according to
model (see illustration Job
3-4,
arrowed) close to the spark
plug holes, and tighten to their specified torque. See Chapter

3, Facts
and Figures.
G Step 7: All items previously removed in Job 2 can now be
fitted in reverse order. When connecting the exhaust always

use a
new flange gasket.
G Step 8: Ensure that all connections are sound and secure.
G Step 9: All items previously removed in Job 2 can now be
fitted in reverse order. Refer to Job
1
when fitting the timing

belt.
When connecting the exhaust always use a new flange
gasket.
G Step 10: Ensure that all connections are sound and
secure.
G Step 11: Top up the cooling system with the correct

50/50
solution of FL 'Tutela' anti-freeze solution. Check the

oil
level.
• Step 5: Clean and check all components for wear and
signs of 'scuffing'.
B INSIDE INFORMATION! If the camshaft is changed, the
followers should be changed as well. If the bores in the
housing have 'picked up', these cannot be machined and
the housing should be replaced together with new cam
followers. B
• Step 6: Refit the camshaft to the cam housing and insert
the cam followers and shims in their correct bores, using
grease to keep them in place. For adjustment of valve clear-
ances see Job 7.
2 ZeASt, s * when re'inserti"9the
nfW^c/ !X J?^ camshaft, it can be difficult
to get the camshaft fully in
to its end seal. DON'T try hammering it in
-
all you'll
do is damage the seal. Lubricate the seal with fresh
engine oil, insert the camshaft until it is aligned with
and just touching the seal. Push the camshaft with a
twisting motion until it eases its way into the seal.
Job 4. Petrol engine.
Cylinder head - dismantling and
overhauling.
G Step 3: Remove the

cam
followers and shims

from
the housing,
keeping them in the
correct order for refitting

in the
same positions.
Refer to the illustration Job
2-1
for the components covered

in this
Job.
G Step 1: Remove the camshaft housing from the cylinder
head. See Job 2.
G Step 2: Remove the
camshaft housing end

plate
(or the distributor
mounted in the same

place on
certain models).
G Step 4: Slide the
camshaft out, taking
care not to damage the
camshaft bearings with

the cam
lobes.
• Step 7: Use a suitable valve spring compressor to
compress each spring in turn to allow the removal of the split
collets from the valve stems. Inexpensive valve spring
compressors are readily available from auto, accessory stores.
Take care not to lose the collets when releasing the spring
compressor.
Q Step 9: The valve spring caps, springs and spring seats
can all be lifted clear and the valves withdrawn from their
guides.
• Step 8:
These are the
items to be
removed once
the valve is
withdrawn.
1 - flat washer 2 - lower cap 3 - inner spring
4 - outer spring 5 - upper cap 6 - collets Job 4-8

&CASU / # Q StGP 101 The ValV6S i* (/ should slide freely out of
their guides. Any resistance
may be caused by a build up of carbon, or a slight burr
on the stem where the collets engage. This can usually
be removed by careful use of fine wet-or-dry paper,
allowing you to
withdraw the valves
without scoring their
guides. Keep the valves
in their correct order by
wrapping a numbered
piece of masking tape
around each stem.
• Step 12: Clean the
carbon from the valves with
a rotary wire brush and
wash them in paraffin.
Wash the valve springs,
caps, seats and collets and
dry.
/ • Before grinding-in the
valves, clean the tops of the
valve heads back to shiny
metal. Now the sucker on the end of your valve
grinding stick won't keep falling off when you grind-
in the valves!
head. Don't hesitate to seek the advice of your local agent if
you have any doubts.
• Step 14: Examine the valve seats for pitting or burning.
Also, check the valve seats in the cylinder head. Small pits can
be removed by grinding the valves onto their seats. The seats
in the cylinder head will have to be recut (again, by your local
FIAT agent if the pitting is too deep), and new valves fitted.
B INSIDE INFORMATION! These cylinder heads use
hardened valves and seats for use with unleaded petrol.
We advise you to consult your FIAT agent or engine
specialist for machining if anything other than light
valve grinding is required. B
FACT FILE: VALVE GRINDING
• Step 15: Apply a small quantity of
coarse grinding paste evenly round the valve
seat. A valve grinding stick with a suction pad
slightly smaller than the valve head should
be selected. Put a dab of moisture onto the suction pad and
press the grinding stick to the first valve.
• Step 16: Lower
the valve stem into its
guide and, holding the
grinding stick
between the palms of
your hands, rub your
hands together (like a
bushman making a
fire), rotating the
valve and grinding the
two seats together.
Lift the valve
regularly, say every
ten or so turns, to
allow the grinding
paste to be redis-
tributed. When you
can feel the paste
wearing smooth,
remove the valve and
wipe all the surfaces
clean. A complete ring
of grey contact area
should be visible on
the valve head and its
seat in the cylinder head. If necessary, start off with coarse
paste to remove the deeper pits, and finally use fine paste to
obtain a smooth finish.
• Make sure that no paste is allowed to enter the guide. This
would cause a lot of wear to the valve stem and guide.
• A narrow contact band means more seat pressure and
longer life. A wide band allows rapid valve burning.
• A complete ring of grey contact area should be visible on
the valve head and its seat in the cylinder head.
• If necessary, start off with coarse paste to remove the
deeper pits, and finally use fine paste to obtain a smooth
finish.
• If pitting is too bad, you could have the valve face and the
valve seats resurfaced or, in worst cases, the valve and/or valve
seat (in the cylinder head) will have to be replaced.
• Consult your FIAT dealer or engine specialist if in doubt.
LJ Step 11: The cylinder head is made of light alloy and is
easily damaged when being cleaned. Use a rotary wire brush
for the combustion chambers and ports, but no sharp objects
such as screwdrivers should be used. The machined surfaces
must have all traces of old gasket removed by use of a straight
edge. Then wash down with paraffin to remove old oil and
dirt and dry with clean rag.
At all costs, avoid gouging
the cylinder head. This can
be very expensive to have
put right.
• Step 13: The cylinder
head can be checked for
distortion by use of a
straight edge and feeler
gauge. At the same time check for excessive corrosion. If you
are in doubt, or if the old gasket had blown, have the cylinder
head refaced by your FIAT agent or engine specialist. The
valves should be checked for side movement in their guides.
Anything but the very slightest tells you that the valve guides
are in need of replacement. Your local FIAT agent or engine
specialist should do this job. Examine the valve seats for
pitting or burning, also check their mating seats in the cylinder
72

G Step 17: Now repeat this operation on the remaining
valves.
G Step 18: Wash the whole cylinder head again using
paraffin and an old brush, making sure that all traces of
grinding paste are removed, then dry off. Use compressed air

if
available.
SAFETY FIRST!
•
Treat
compressed air with respect. Always wear

goggles
to protect your eyes.
•
Never
allow the airline nozzle near any of the body Sep apertures.
H INSIDE INFORMATION! Check the height of the valve
springs against new ones if possible, but if not, compare
them with each other. If any are shorter than the others,
play safe and replace the complete set. They are bound
to have suffered fatigue which could cause premature
valve failure. H
G Step 19: To install the valves, start from one end.
Lubricate a valve stem with fresh engine oil and slide it in to its
guide.
G Step 20: Locate a new valve stem seal over the stem of

the valve
(if applicable) and push down into contact with the
guide. Position the seal on its seat using a suitable metal tube.
G Step 21: Refit the flat washer and spring seat.
G Step 22: Position the inner and outer springs and the

spring
cap.
G Step 23: Re-apply the valve spring compressor and

compress
the springs enough to allow you to engage the split
collets
in
the stem grooves.
D INSIDE INFORMATION! Grease the grooves so that the
collets will 'stick' in place. The collets are easily fitted by
'sticking' the backs of them onto the end of a screw-
driver with some grease and feeding them into
position. B
G Step 24: Carefully release the spring compressor and

check
that the collets are correctly located. Tap the end of the

stem with
a hammer, to bed them in.
G Step 25: Fit the remaining valves.
Job 5. Petrol engine -
dismantling.
G Step 1: Familiarise yourself with the layout of the engine.

Refer to
illustration Job
2-1
for an exploded view of the

engine
components.
G Step 2: Drain the engine oil. Remove the cylinder head.
See
Job 2.

G Step 3: Remove the distributor. See PART D: IGNITION
• Step 4:
Remove the petrol
pump and spacer
block, if the
mechanical type
(a). (Electric fuel
pumps are in the
fuel tank.)
• Step 5:
Remove and
discard the oil filter
illustration Job
5-4,

• Step 6: Remove the water pump complete with its distri-
bution pipe, and the power steering pump (if fitted).
Q Step 7: Remove the alternator, the crankshaft pulley, the
crankshaft and camshaft sprockets, the cam belt tensioner
and the cam belt cover backplate.
• Step 8:
Remove the
auxiliary shaft
sprocket...
• Step 9: ...the
end plate and
seal, and remove
the auxiliary shaft.
• Step 10:
Undo and remove
the clutch, and
then the flywheel.
• Step 11: Turr
engine assembly c
remove the sump
and remove the crankcase breather (see
part b) with its pipe.

• Step 24:
Remember to retrieve

the
two thrust
washers from the

end
main bearing in
the block. There are
none in the cap.
If so, you will probably need a new housing. If you are
replacing the camshaft, fit new followers as well.
IMPORTANT NOTE: All bearings, shells, piston rings and
ALL seals that bear on moving parts MUST be copiously
lubricated with fresh engine oil as the engine is being
reassembled. Work ONLY in clean conditions, with clean
components and clean hands. Re-assemble in the reverse
order of the dismantling procedure and take note of the
following steps which will help you carry out a smooth
operation.
Engine Reassembly lob 6. Petrol engine -
checking and reassembly.
Q INSIDE INFORMATION: It is good policy to change the
oil pump when carrying out an engine overhaul. A
replacement engine supplied by your FIAT agent would
include a new pump. D
Checking for Wear
GENERAL
All parts must be thoroughly cleaned for inspection
-
still
keeping them in the right order for reassembly in case they

are to
be re used. Check each component as follows:
CYLINDER BLOCK

Look
for any cracks in the casting, particularly at bolt holes

and
between cylinders. Check the bores for score marks,
caused by burned pistons or broken rings. Check for a wear

ridge just
below the top of the bore where the top piston ring

ends its
travel. If any of these defects are present in any of the
cylinders, they will have to be rebored. Ask your FIAT dealer or

engine
specialist to inspect and measure the bores for wear if

you
are unsure. It is sometimes possible to 'glaze bust' the

bores and
fit new piston rings, assuming the pistons and bores

to be in
reasonable condition. All of this work can be carried

out by
your FIAT dealer.
CRANKSHAFT
Check
all
the mains journals and crankpins for any signs of
wear ridges round the circumference or scoring of the surface.

Check
for ovality with a suitable micrometer, 0.005 mm being

the maximum
permissible amount. Check the shell bearings,

which
should have an even, dull grey finish. If this has worn

through
to the copper coloured backing, or if the crankshaft

has any
of the previously mentioned faults, the crankshaft

should
be reground by your specialist who will also supply the

new shell
bearings and thrust washers.

Check
the crankshaft end float by using a feeler gauge
between the thrust washer and the crankshaft. Thicker

washers
are available if required, see Chapter
3,
Facts and
Figures.
CAMSHAFT
Check each cam lobe for wear, which can be quite rapid once
started. The cam followers should also be checked, particularly

where
they contact the cam lobe. Check the five camshaft

bearings
and their corresponding surfaces in the housing for a

smooth
shiny surface without wear ridges. Check the cam
follower bores in the camshaft housing for pitting or scoring.
Job 6-1
Q Step 1: Make sure you have all the necessary gaskets,
available from your FIAT dealership.
CRANKSHAFT
• Step 2: Apply some
grease to the smooth side of
the thrust washers and 'stick'
them in position either side of
No. 1 main bearing.

• Step 7: Using a suitable screwdriver, prise out the old oil
seal from the front housing or drift it out, as shown.
PISTON/CONNECTING ROD ASSEMBLIES
• Step 11:
Fitting the
gudgeon pin in
connecting rod -
piston assembly.
Fit new circlips to the ends of the gudgeon pins.
• Step 12: Note the
correct piston offset
relative to the auxiliary
shaft (1). Note the
positions of the con-rod
cylinder bore numbers (2).
Q Step 5: Screw the bolts in finger tight and check that the
crankshaft rotates freely and smoothly.
Q Step 6: Tighten the bolts evenly and progressively until
the specified torque setting is reached. See Chapter
3,
Facts
and Figures. Check again that the crankshaft rotates
smoothly.
• Step 3: Make sure
the bearing seats in the
block are perfectly clean
and locate the shells so
that their tabs engage
with the slots. Lubricate
the shells liberally with
fresh engine oil and
lower the crankshaft
into position.
• Step 4: Fit the remaining halves of the shells into the
bearing caps, lubricate threm and position the caps the right
way round and in the correct order.
Fit the piston in the
connecting rod,
positioning it so
that the flat part of
the crown is facing
the same way as
the cylinder bore
number on the connecting rod. See Step 12.
Job
6-12

• Step 13 A:
Make sure the
bores and
pistons are
clean. Position
the piston ring
gaps at equal
intervals round
the pistons
circumference
and lubricate
well. Make
sure the rings are fitted with the word 'TOP' facing upwards
where marked.
1
• Step 9: Refit the housing
with a new gasket and make
sure that the housing face is
flush with the face of the
cylinder block by using a
straight edge across the
surfaces, then tighten the
bolts.
• Step 10: Take the rear oil
seal housing and repeat Step
7 to Step 9
Q Step 8: Clean the oil seal recess in the housing and drive
the new seal into position, preferably using a suitably sized
socket
-
the lip of the seal facing in towards the block.
Lubricate the seal with copious
amounts of fresh engine oil.
• Step 13B:
Alternatively, use
a special piston
ring fitting tool,
if you have one
-

or have your
dealer do it for
you.

G Step 14: Locate a ring
clamp over the piston rings and
tighten enough to close the

ring
gaps, but not too tight!
Lubricate the rings so that they
compress and slide easily within

the
clamp.
• Step 15: With the ring

clamp
touching the cylinder
block, use a hammer shaft to
carefully tap the piston through

the
clamp and into the bore.
Q Step 27: Refit the cam belt tensioner and lock,
temporarily, in the non-tensioning position.
IMPORTANT NOTE:
When refitting the
crankshaft pulley nut,
note that the stepped
side must face the
engine.
• Step 29: Fit the
timing belt. See Job 1.
• Step 17: Fit the other
half of the big-end shell to

the
bearing cap and
lubricate. Offer the cap to

the
connecting rod and make

sure
that the numbers match.
Screw
in
the fixing bolts and
tighten progressively to the
correct torque. See Chapter

3, Facts
and Figures.
• Step 18: Fit the
remaining piston/conrod
assemblies and stand the
engine upside down on a

clean
surface.
• Step 19: Lubricate the
auxiliary shaft bearings and
position the shaft in the
cylinder block.
• Step 20:
Fit the
auxiliary shaft

end
plate

complete
with

a
new seal

and
gasket.
G Step 16: Locate the upper
half of the big end shell
bearing in the conrod, making

sure
that the mating surfaces

are clean.
Lubricate the
crankpin and the big-end

shell
and draw the conrod
down the bore so that the

big end
locates with the
crankpin.
• Step 21:
Prime the oil
pump with
new oil. Fit
the pump and
the oil return
pipe, tight-
ening the
bolts to their
specified
torque. See
Chapter
3,
Facts and Figures. The three larger bolts, shown
here, locate the pump to the block.
• Step 24: Turn the engine over so that it is now standing
on its sump.
• Step 25: Refit the cylinder head, the camshaft housing
and camshaft assembly. Refer to Job 3.
Q Step 26: Refit the two inner parts of the timing belt
cover.
• Step 23: Place a new
gasket on the cylinder
block and fit the sump.
Make sure that the
securing nuts and bolts
have their plates under
them and tighten them
progressively.
• Step 22: Apply FIAT
sealing compound No.
5882442 (or Loctite
equivalent) to the joints
between the cylinder
block and the front and
rear oil seal housings.
• Step 28: Fit the crankshaft, auxiliary and camshaft
sprockets, and tighten
to their correct torques.
See Chapter
3,
Facts
and Figures.

• Step 30: Fit
the crankshaft
pulley and
tighten. See
Chapter 3,
Facts and
Figures.
• Step 31: Fit the
water pump and
distribution pipe.
• Step 32A: Refit the
flywheel. Do not unbolt the
TDC sensor (1) from the oil seal
housing at its mounting plate
bolts
(2)
unless it is essential to
do so.
• Step 32B: If
the sensor
mounting plate has
to be disturbed, you
will need the FIAT
special tool illus-
trated here (inset) in
order to reposition it
correctly. Position
the timing mark on
the crankshaft
pulley with the zero
degrees mark on the outer timing belt cover (and double
check that the timing mark on the flywheel
-
rubber bung
removed
-
is aligned at zero degrees).
With the bracket fitted to the oil seal housing, fit the FIAT
special tool onto the bracket in place of the sensor with a slot
in the tool fitting exactly over the TDC pin on the flywheel.
When everything is lined up, position the bracket accurately
and tighten the bolts. Remove the tool and refit the sensor.
IMPORTANT NOTE: During assembly, a shear-bolt will
have been fitted to prevent accidental movement of the
bracket. If you need to undo it, you will need to drill it
out and you should replace it with a new one obtained
from your FIAT dealership.
• Step 33: Refit the clutch. See PARTB: TRANSMISSION,
Job 4.
Q Step 34: Refit the fuel pump and pushrod using new
gaskets on both sides of the spacer block, 0.3 mm thick
between the spacer and the engine and 0.7 mm between the
spacer and the pump. See PART F: FUEL AND EXHAUST for
information on setting the pump position.
• Step 35:
Lubricate the sealing
ring and screw on a
new oil filter.
• Step 36:
Before refitting the
distributor, (see
PART D: IGNITION)
refit, if necessary,
the oil pump drive
gear.
• Step 37: Refit
all remaining
auxiliary compo-
nents (including the
oil vapour recovery
device, shown here),
using new gaskets
as necessary and
referring to
Chapter
3,
Facts
and Figures for the
torque settings.
Q Step 38: Reconnect the engine to the transmission. See
Job 11.
Q Step 39: Refit the complete unit to the car. See Job
9.

• Step 40: fl INSIDE INFORMATION! Before fitting the
spark plugs and with a fully charged battery, turn the
engine on the starter until the oil warning light goes
out. This primes the lubrication system and gives more
immediate oil pressure on initial start up after overhaul-
a critical time in the life of an engine. B
• Step 41: Fit the spark plugs and start the engine
-
this
might take a few seconds more than normal on the initial start
up.
• Step 42: Allow the engine to warm up on fast idle
until
it
reaches working temperature and then slow it down to its
normal speed (if adjustable
-
see PART F: FUEL AND
EXHAUST)

G Step 43: Stop the engine and allow it to cool, check the

oil
and coolant levels and look for any leaks.
G Step 44: Avoid over-rewing or overloading the engine
during its settling down period of 600 miles. We recommend

an oil
and filter change at this mileage
-
this will help to
extend the life of your new engine.
Job 7. Petrol engine.
Valve clearances - adjustment.
0 INSIDE INFORMATION! Adjustment should always be
made with the engine cold. B
G Step 1: Remove the camshaft cover and the spark plugs.
Jack up a front wheel and engage top gear. Turning the wheel
will rotate the engine and therefore the camshaft. If the
engine
is
out of the car, use a socket and long lever on the
crankshaft pulley nut. If the cylinder head is detached, turn

the
camshaft belt sprocket, by hand.
G Step 2: The inlet and exhaust valves use different clear-

ances
which are checked when each cam lobe is pointing
directly away from its follower. See Chapter
3,
Facts and
Figures.
G Step 3: The order in which the valves are fitted in the
cylinder head is:
Inlet: 2-3-6-7
Exhaust: 1-4-5-8

from
the timing cover end.
G Step 4: Select a feeler blade which is about the thickness

of the
correct valve clearance and insert it between the heel of

the cam
and the cam follower shim when the cam lobe is
uppermost. If necessary, select different thicknesses of feeler
blade until a small amount of drag can be felt as the blade is
pushed in and out. Record the total blade thickness. This is the
valve clearance for this valve.
G Step 5: Rotate the camshaft and repeat this operation on

each
of the remaining seven valves, noting their respective
clearances. Those which have clearances within limits
obviously don't need any further attention.
Q Step 6: The remaining valves will now need to have their
shims (arrowed) changed for thicker or thinner ones, bringing
their clearances to within the specifications shown in Chapter
3, Facts and Figures
Ll Step 7: A special tool is needed to depress the cam
follower and allow extraction of the shim. This is available
from your FIAT dealer, or you will have to make a lever with a
fork that locates nicely on the rim of a cam follower allowing
removal of the shim by prising it from the follower.
• Step 8: The
thickness of a shim
is engraved on it in
mm (arrowed). If
this is worn away,
you will have to
measure the
thickness with a
metric micrometer
-

or have your FIAT
dealer do it for you.
Your FIAT dealer can
also supply any new
thickness of shim
you may require.
• Step 9: Where
a clearance is too
small with the thinnest shim in position, the valves should be
removed and the stem ground just sufficiently to make the
correction. Your FIAT dealer can do this, keeping the end
square and retaining a smooth finish.
fjfefe^ | Job 7-10
Q Step 10: Be sure to use a new gasket when the cover is
replaced.

Job 8. Petrol engine/transmission
- removal.
IMPORTANT NOTE: See PARTB: TRANSMISSION for
gearbox removal by itself.
H INSIDE INFORMATION! The complete engine/trans-
mission unit is removed and replaced from under the car
- and this applies to all types. Make sure you can raise
the front of the car high enough (and support it safely
and securely!) to allow the power unit to be pulled clear
from underneath, before starting work! 13
• Step 1: Remove the bonnet
-
see PARTI: BODY AND
INTERIOR, Job 1.
• Step 5:
Disconnect the
carburettor or
injector fuel lines,
choke and throttle
cables and hoses and
electrical connections
(arrowed).
Q Step 6: Disconnect the starter motor cables, HT leads,
fuel pump lines, sensors and electrical connectors arrowed.
Job
8-7

• Step 2: Disconnect the battery earth lead.
• Step 3: Drain the cooling system and the engine oil.
Disconnect all hoses shown.
• Step 7: Disconnect the clutch cable (3) or clutch slave
cylinder, if hydraulic, the earth cable (2) and the reversing
lights switch cable
(1)
from the top of the gearbox.
• Step 8: Disconnect the alternator cables.
Q Step 9: Slacken the front wheel bolts, raise the car and
support securely on axle stands. Remove the wheels.
• Step 10: Drain
the gearbox oil.
• Step 4:
Remove the air
filter-to-engine
connections
-

earlier type illus-
trated. (There are
some hose
connections
underneath on
the later type,
mounted on top
of the engine.) Disconnect the electrical connection and all
other hoses from the filter housing.
• Step 11:
Remove the buttons
(gearbox side,
arrowed) fixing the
dust shield to the
wheel arch on each
side.

• Step 16: Unbolt

the
lower suspension

arms
(arrowed)...
• Step 17:

...remove
the

drive
shaft

assemblies
from
their housings in

the
gearbox...
• Step 15: Undo

and
remove the
suspension strut to

stub axle
nuts and

bolts
(arrowed
-
two

each side).
Pull the

tops
of the stub axles

clear
of the struts.
• Step 12:
Disconnect both
trackrod ends from

their
steering arms.
• Step 13:

Remove
the fixing

bands
(arrowed) on

the
protective boots

on the
inner ends of

the
drive-shafts.
• Step 14: Unplug

the brake
pad wear

sensors
(a) if fitted.
Unbolt (see arrows)

the
complete caliper
support bracket.

Hang
each caliper

and
bracket in their
wheelarches, taking

care
not to strain or

damage
the hydraulic
hoses.
• Step 21:
Remove the nuts (1)
holding the centre
support to the
gearbox, and those
(2) holding the
flywheel shield.
• Step 22:
Remove the centre
support/mounting (a)
and the flywheel
shield (b).
• Step 18: and
remove each
complete front hub,
drive-shaft and brake
disc assembly.
Job 8-18
Q Step 20: Support the power unit, just keeping its weight
off the mountings.
E3 INSIDE INFORMATION! This can be done from under-
neath with a trolley jack and piece of wood on its pad to
prevent damage
-
or by means of a hook from above. B
• Step 19:
Disconnect the gear
selector linkage and
place it out of the
way, in the lower
part of the engine
compartment.
Job 8-19
Job 8-13
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