1988 FIAT TEMPRA set clock

FACT FILE: DIGIPLEX DISTRIBUTOR
REMOVAL
25E. If the distributor has to be removed
for any reason, it is ESSENTIAL that the
PRECISE position of the rotor arm in
relation to the distributor body and the
position of the distributor body (2) in relation to the
cylinder head
-
via the spacer (1)
-
are clearly marked so
that they can be
replaced in
EXACTLY the
same position.
Note that the
locator
(arrowed) only
gives an approx-
imate, not a
precisely correct
location of the
spacer.
25F. D INSIDE
INFORMATION:

Use
touch-up
paint
and
let it
dry before
removing the
unit. D
SETTING THE RPM AND TDC SENSOR POSITION
25G. This job can not
be carried out without
the FIAT special tool
illustrated. The sensor
is correctly positioned
when the engine is
produced and to
prevent accidental
tampering, one of the
two bolts holding the
sensor in place is a
shear bolt and will have to be renewed if removed.
IMPORTANT NOTE: The slots in the distributor body are
NOT used to alter the advance setting, as on a conven-
tional distributor. This operation is carried out by the
position of the TDC sensor
-
see later.
CHECKING THE IGNITION ADVANCE can be carried out in an
approximate manner using the same method as described in

25C.
However, you must make sure that the following steps

are
taken:
•
the
vacuum pipe between the electronic control unit and

the
inlet manifold must remain connected and be in good
condition
-
neither blocked nor split.
•
the
engine must be at its normal operating temperature.
•
the
idle speed/mixture/CO adjustments must be correct
-

see Job 35.
•
with
the engine idling at between 800 and 900 rpm, the

mark on
the crankshaft pulley should be at approximately 12
degrees BTDC.
IMPORTANT NOTE: The only marks are for 0, 4 and 10
degrees BTDC, so you will have to make a guess at the
correct position for 12 degrees.
FACT FILE: TIMING MARKS
y-; • It appears that some earlier engines
H. j may be fitted with different types of
J timing marks. There might be a metal
pointer fitted to the timing belt cover.
Other engines may have their timing marks in the
flywheel housing, so that you need to take out a rectan-
gular rubber bung and look out for the fixed timing
mark on the flywheel housing and the timing settings

on
the flywheel itself.
• It always helps to paint all of the timing marks with
white paint or typists' correction fluid so that they are
easier to see when the timing light is operating.
1. Line up the mark on the crankshaft pulley with the 0
degrees (TDC) mark on the timing belt cover. See 25C.
2. Without moving the crankshaft from this position, undo the
screws holding the rpm and TDC sensor to the sensor carrier
plate. Fit the tool no. 1895898000 in place of the sensor.
Check that the flywheel pin or lug (3) must fit in the groove of
the tool and the bolts must tighten easily. If not, carry out the
following procedure:
3. Slacken the bolts securing the carrier plate behind the
sensor.
4. Move the plate so that the tool slips freely into the sensor's
hole and the bolts tighten easily.
5. Tighten the bolts holding the sensor carrier plate in place.
6. Remove the tool and refit the sensor.
ON BOTH TYPES: As the distributor is turned (clockwise to
advance, anti-clockwise to retard), the timing mark on the
flywheel will be seen to move relative to the pointers. Move
the distributor so the timing marks are aligned correctly, and
retighten the clamp nut or bolts.
• Job 26. Check/adjust drive belt/s.
26A. Depending on
your Tipo or Tempra
model, access to the
alternator belt and
adjustment fixings will
probably be possible
from the engine bay.
V-BELTS ONLY
Check the belt, and if there is any sign of cracking, 'polishing',
fraying or severe wear on the inner face, replace it. The belt
should deflect by about 10 mm when firm thumb pressure is
applied to the belt between the pulleys in the direction of the
arrow. Too little tension and the belt might slip; too much,
and belt and bearing wear will increase.

IMPORTANT NOTE: • All Tipo/Tempra diesel engines are
self-bleeding and there should be no need to bleed air
out of the system manually.
• If the engine does not eventually re-start, check all the
unions for the fuel inlet pipe and the other unions,
replacing the sealing washers if necessary, to eliminate
any air leaks.
Q Job 35. Check/adjust petrol engine idle and
emissions.
Setting the idle speed and mixture is not just a matter of

making
the car run smoothly and economically; it's also a
question of allowing it to run within the legal hydrocarbon
(HC), Nitrous Oxide (NO) and carbon monoxide (CO) emission
limits. If it
is
outside limits, the car will fail the annual test.
(However, a worn engine will fail even if the carburettor or
injection system is correctly set up.)
FACT FILE: ESSENTIAL
PREPARATIONS
• When tuning the engine you should
adjust the carburettor (when fitted) last
of all, as its settings will be affected by
the state of tune of the rest of the engine.
• Ignition dwell angle and timing must be correct, the
air
filter
should be clean, there should be no air leaks

on
the induction system, and all electrical components

and
the air conditioning (if fitted) should be switched
off.
• Get the engine to full operating temperature before
checking and adjusting.
• If
you
warm the engine on tick-over (instead of on a
journey), it won't be hot enough until you have heard
the electric cooling fan cut in twice.
Q INSIDE INFORMATION: These jobs require the use of a
tachometer (rev-counter) and an exhaust gas analyser to
achieve any degree of accuracy. If you don't own them -
and relatively inexpensive tools are now available
-
you

may
wish
to have the work carried out by your local FIAT
dealer. D

ROUGH
GUIDE: Within each section is a description of how
you
can
get the car running tolerably well without any

specialist
equipment, so that you can take it to your FIAT

dealership
for accurate (and MoT-able!) tuning.
35A. Check the float
level with the carburettor
in the position shown.
Distance (c) should be
30mm with gasket fitted.
Bend tab (2) to adjust
-

but the tab should
remain virtually perpen-
dicular. Do NOT adjust
items (1)or (3)1
35B. IDLE SPEED
ADJUSTMENT: Connect a
rev-counter according to
the maker's instructions,
and check the idle speed.
clockwise increases the
idle speed, anti-clockwise
reduces it. Set the idle
speed in accordance with
Chapter
3,
Facts and
Figures.
ROUGH GUIDE: Turn the screw until the engine is running at
the slowest speed at which it runs smoothly and evenly.
MIXTURE ADJUSTMENT: Check that the idle speed is correct
and make sure that the engine is at full operating temper-
ature. Connect an exhaust gas analyser as instructed by the
maker. If the CO reading is outside the range shown in
Chapter
3,
Facts and Figures, adjustment as follows:
Use a narrow-blade screwdriver and turn the screw (2)
clockwise to weaken (reduce) or anti-clockwise to richen
(increase) the reading.
ROUGH GUIDE: Turn the mixture screw inwards (clockwise).
As you do so, the tick-over speed will increase, until the point
comes where the engine starts to run 'lumpily'. Back off the
screw until the engine runs smoothly again, and then some
more until the speed just starts to drop. At this point, screw
the adjuster back in by a quarter-turn and you'll be
somewhere near the optimum setting for smooth running.
IMPORTANT NOTE: After setting the mixture adjustment,
re-check and, if necessary, re-adjust the idle speed.
CARBURETTOR MODELS ONLY
TAMPER PROOFING: All Tipo carburettors originally had a
tamper-proof seal placed over the mixture adjustment screw.

These
seals are to prevent anyone unauthorised from altering

the
mixture and exhaust emissions. In certain countries these

seals
must be retained by law.

If the
seal
is
a plastic cap placed over the adjuster screw, it can

be
broken
off with pliers. If it is a plug within the screw recess,

force
it out with a sharp object.
35C. This illustration
shows the correct
settings for the
choke fast idle
adjustment (manual
choke only) and the
automatic anti-
flooding device
adjustment. See
following page.

50A. Remove the two

bolts
(one or both of
them also the wheel
positioning stud/s)...
50B. ...and remove
the
drum.
Clean the
inside of the drum and
the brake with aerosol

brake
cleaner. If the
drum is badly scored

or cracked,
replace it.
50F. So that you don't
have to bleed the
system, release and
disconnect the parking
brake cable (arrowed)
and lift the caliper out
of the way, suspending
it on a piece of wire so
that no strain is placed
on the flexible hydraulic
hose.
50G. The brake pads are simply lifted away.
50E. Using a pair of
spanners, as shown,
remove the two
retaining bolts. These
bolts are self-locking
and FIAT recommend
that they should be
replaced each time they
are removed or if they
become loose.
Examine the brake

shoes
for wear or oil
contamination. If the
latter, the wheel cylinder is probably leaking (see 50C) and the

shoes will
have to be scrapped. FIAT recommend a minimum

1.5 mm
shoe lining thickness, but it's advisable to replace

shoes
well before they're this thin.
50C. Fold back each of

the
two rubbers on

the wheel
cylinder.
Any
fluid
found inside
requires a new
cylinder. However,
newish cylinders will

have a
little of their
special grease still in
there.
. """
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| 50D|

50D. Take
special care

to wash
all the brake

dust
away from the
automatic adjuster
mechanism with
aerosol brake cleaner.

Make
sure that it is

not seized
but if it is,

you will
have to strip

down
the assembly (see Chapter
6,
Repairs and

Replacements)
and free off or replace. Add brake grease very
sparingly (NOT ordinary grease) to the mechanism.
IMPORTANT NOTE: For information on replacing missing
or damaged springs, brake shoes or wheel cylinders, see
Chapter
6,
Repairs and Replacements.
DISC REAR BRAKES

With
the rear of the car raised and safely supported (see

Chapter 1,
Safety First) and the rear wheels removed, brake

pad
inspection can be carried out by looking through the
aperture in the caliper body. However, as for the front brakes,

you are
recommended to remove the calipers. See notes at

the
start of Job
49.
The pads should be replaced as detailed in

Chapter 6,
Repairs and Replacements. Minimum thickness

is 1.5 mm -
but don't let them get this low!
• Job 51. Check/adjust handbrake.
The handbrake is intended to 'set' itself in use as the rear
brake self-adjusters operate. If the handbrake seems not to
work, even though lever travel is not excessive, remove the
rear drums and examine the brake shoes (see Job 50) and the
self-adjuster mechanism, to ensure that it has not seized. The
handbrake may need adjusting when, after a time, the
handbrake cable stretches or if the rear brake friction materials
are replaced.
IMPORTANT NOTE: On rear disc brake cars, the
handbrake-end of the mechanism is the same as for
drum brake cars. At the brakes, the clearance is adjusted
automatically, provided that the adjuster, built in to the
caliper assembly, has not seized. If it has, replace the
caliper.
SAFETY FIRST!
Raise the rear of the car to adjust the handbrake. It
is

ESSENTIAL to ensure the front wheels are securely
chocked in both directions, and that axle stands are
used to support the car.
IMPORTANT NOTE:
• Follow Job 49
carefully for further
information such as
on checking the
caliper seals, the
condition of the disc,
and lubricating the
pad backing plates.
• Before fitting new
pads, turn the caliper
piston clockwise until it goes fully in.
• Pump the brake pedal repeatedly to adjust the pad
positions and top up with fresh brake fluid.

Q Step B11: Undo the belt tensioner nut (see illustration
Job 13-B10, part d), then remove the timing belt.
Q Step B12: Undo the nuts securing the brake vacuum
pump to the cylinder head (see illustration Job
16-1),
and
remove it.
• Step B13: Fit FIAT tool no. 1860932000 (for setting
camshaft timing) to the vacuum pump end of the camshaft,
matching the camshaft groove (1) with the lug (2) on the tool

Secure
the tool to the cylinder head, positioning the centring

dowel
(3) as shown. The dowel must be perfectly centred on

the tool,
and if it isn't, you should adjust the hexagonal bolt

(4) with
a spanner, and centre it with tiny movements.
• Step B14:

Remove
the bolt
(arrowed) which

secures
the front

cover
to the engine

block,
then fit the
timing belt on the
crankshaft sprocket.
• Step B16:
Lock the injection
pump sprocket (see
StepA13). Now,
using FIAT tool no.
1860831000,
slacken the bolt
securing the
camshaft sprocket.
• Step B17: Continue fitting the timing belt in the
following sequence: crankshaft sprocket, fixed tensioner,
injection pump sprocket, timing sprocket, belt tensioner... and
check that the mark on the injection pump lines up with the
fixed mark on the rear cover.
• Step B18: Use the timing belt tensioner to correctly
tension the belt.
B INSIDE INFORMATION: If you do not have the correct
tensioning tool, follow Steps A16 and A17. B
• Step B19: Tighten the camshaft sprocket bolt to the 1
specified torque (see Chapter
3,
Facts and Figures).
Q Step B20: Turn the crankshaft by two revolutions
(clockwise), tighten the belt tensioner to the specified torque
(see Chapter
3,
Facts and Figures) and remove the
tensioning tools. If the belt is correctly tensioned you should
just be able to twist it through a quarter-turn when gripping it
between thumb and finger in the centre of its longest run
between sprockets. Adjust as necessary.
O Step B21: Refit the remaining components in the reverse
order of removal, then check the injection timing. See
Chapter
5,
Servicing Your Car, Job 25.
Job 14. Diesel engine.
Cylinder head - removal.
• Disconnecting the high pressure pipes on a diesel
injection system can be dangerous!
• Read the Safety First! information at the start of
PART F: FUEL AND EXHAUST SYSTEMS before
starting work.
Q Step 1: Refer to Job
13
and remove the timing belt.
• Step 2: Drain the cooling system and disconnect the air
pipes from the inlet manifold.
Q Step 3: Disconnect
and remove the oil vapour
pipes from the cylinder
block device.
Job 13-B13
• Step B15: Fit

FIAT tool
No.
1860933000 for

precise
determination

of TDC
on cylinder

No. 1. The
tool must

be secured
firmly by

two bolts
to the
crankshaft sprocket,

and by
another bolt

to the
crankshaft front cover (where the bolt was previously
removed in Step B14).

over stop and will also reach its 'maximum speed' stop with
the pedal fully depressed.
Job 8. Mechanical fuel pump,
petrol engine (carburettored) -
replacement.
O Step 1: Disconnect the battery earth lead.
• Step 2: Find the pump on the forward facing side of the
cylinder block near the timing cover end. Disconnect the two
fuel lines from the pump and plug the ends, (labelling them
for correct refitment).
• Step 3: Undo the two
mounting bolts and
remove the pump (a) and
spacer block (b).
• Step 4: Clean off any
old gasket particles and
refit in reverse order using
new gaskets. Check that
the hose connections are
sound.
D INSIDE INFORMATION! Where the fuel pump is of the
pushrod type, the inner gasket should always be 0.3 mm
thick. The outer one is available in 0.3, 0.7 and 1.2 mm
thicknesses from your FIAT dealer, allowing for fuel
pressure adjustment. Pressure is higher with a thin
gasket and lower with a thick one, and the correct
pressure is 0.176 bar. Q
/ # lfyou h"ve a m/cromefer
ff (y - or a good vernier caliper,
clean the old gaskets,
measure their thickness, and fit new gaskets of the
same thickness.
Job 9. Electric fuel pump, petrol
engine (S.P.I.) - replacement.
• Step 2: Lift
the luggage
compartment
floor covering
and remove the
dust cover from
above the fuel
pump (arrowed). .
• Step 3:
Disconnect the
electrical plugs
from the pump and fuel gauge sender.
• Step 4: Unscrew the fuel gauge sender unit by twisting
the two opposing lugs anti-clockwise.
D INSIDE INFORMATION! FIAT use special tool for this
(see illustration Job
9-2,
inset) but it can be done
without, by using a little care. Use two vertically held
screwdrivers against the lugs and another levering
between them as low as possible. H
Q Step 5: Remove the safety plate and disconnect the fuel
supply pipe (the white union)...
Q Step 6: ...and the return pipe (the black union).
1-1 Step 7: Undo the large ring nut securing the pump to the
tank, ideally, using tool 1854041000 and a polygonal spanner
or by making up a tool of your own!
SAFETY FIRST!
• Do NOT drift the nut because of the risk of
causing

sparks.
Q Step 8: Remove the pump
from the fuel tank.
Q Step 9: Refit in reverse
order making sure all electrical
and fuel connections are sound
and correctly made.
• Step 10: Remember to
refit the fuel pump relay and
reconnect the battery.
SAFETY FIRST!
• Depressurise the fuel system before starting work
-
this
is important because fuel remains under pressure in the
system long after the engine has been switched off.
• Step 1A: Depressurise the fuel system by unplugging
the fuel pump relay (a) and running the engine until it
stops. The relay (b) is for the injection system; (c) and (d)
are fuses for the Lambda sensor and the fuel pump,
respectively.
• Step 1B: Switch off the ignition and disconnect the
battery leads, starting with the earth lead.