compression ratio FIAT TEMPRA 1988 Service And Repair Manual

26B. If adjustment is
necessary, slacken the
tensioning nut (A) and
the alternator pivot (B),
on all models. (These
are two typical
layouts.)
Use a length of wood
to pivot the alternator
away from the engine
block but take great
care not to damage the
alternator casing.
Tighten the nuts/bolts
when the tension is correct.
RIBBED BELTS ONLY
If your vehicle is fitted with a ribbed belt, pivot the alternator
as described above and tighten it when you can just twist the
belt by 1/4 turn in the middle of its longest run.
IMPORTANT NOTE:
• Belt tension should only be adjusted when the engine
is cold.
• After adjustment, run the engine for 15 to 30 seconds,
to allow the belt to bed-in, then check again.
• Experience mechanics claim that belts often go slack
when the engine heats up, producing belt squeal.
• If this happens on your vehicle, adjust the belt again
when the engine is hot. Wear industrial leather gloves
and long-sleeved overalls and take very great care not to
burn yourself on the hot engine or exhaust.
If there is an auxiliary unit, such as an air conditioning pump,
driven by a separate drive belt, examine and adjust it as
described here.
Q Job 27. Check electric fan operation.
Drive the car until it is at normal operating temperature. Park
outdoors and, with the gearbox in neutral (or 'P' in the case of
an automatic) leave the engine running. At just above normal
temperature the electric cooling fan should come on, and
then go off again when the temperature drops. Refer to your
temperature gauge, if fitted. If the fan doesn't behave, check
the thermo-switch on the radiator, along with all connections
and wires in its circuit with the fan motor. See Job 13 and
Chapter
6,
Repairs and Replacements.
• Job 28. Run diagnostic ignition/injection test.
DIAGNOSTIC TEST
28A. Have your FIAT dealer
carry out a diagnostic test,
plugging his tester into the
diagnostic socket tucked away
at the front of the passenger-
side footwell.
EMISSIONS TESTS
Vehicles fitted with the Mono-Jetronic fuel injection system
are not fitted with adjustment screws. The system is self-
regulating. However, specified annual checks carried out with
an exhaust gas analyser will provide essential information on
the condition of the injection/ignition system, the catalytic
converter and the engine itself.
28B. The checks are carried out twice: once with the test
sensor at least 300 mm into the end section of the exhaust
pipe (a). (If the shape of the end section of the exhaust pipe is
such that the sensor cannot be completely introduced, a
special extension pipe must be added ensuring that the joint
with the car's tail-pipe is sealed.); the second after undoing
the cap or nut on the exhaust pipe upstream of the catalytic
converter (b).
The following table shows the test limits for carbon monoxide,
unburned hydrocarbons (in parts per million) and carbon
dioxide:
CO (%) HC (p.p.m.) C02(%)
Upstream of the catalyzer (a) 0,4 -h 1 500/600* >12
Downstream of the catalyzer (b)
=£
0,35 =s 90 >13
* FIAT's figures vary.
IMPORTANT NOTE: The engine must be at its normal
operating temperature and normal tick-over speed.
• if the percentage concentration of CO upstream of the
catalytic converter is not within the limits in the table,
check:
• the Lambda sensor
-
see Job 37.
• air penetration around the Lambda sensor housing.
• faults in the ignition or injection systems. (First try
renewing the spark plugs, distributor cap and HT leads.)
If, at the same time, the concentration of hydrocarbons
is not less than 500/600 parts per million (FIAT'S figures
vary), check:
• the ignition timing (see Job 25).
• the valve clearances (see Job 9).
• the valve gear timing (see Job 12).
• the engine compression. (You will need to remove the
spark plugs, fit a compresson tester to each plug
aperture in turn and crank the engine. See the FACT FILE
on page 51.)

Job 8. Automatic gear selector
control cable - replacement.
• Step 4:
Release the
outer cable
centring bush
from its
housing in the
gearbox.
• Step 5: H INSIDE INFORMATION! To
do this, you will have to make a simple
tool as shown here. There is no FIAT
'special tool'
-
each dealer has to make
this one himself! Use the tool to push
lightly upwards, so that the cable
centring bush (illustration Job
6-4

arrowed) comes out of its seat. B
• Step 6: Fit the new cable in the reverse
order. Use a new gasket when refitting the
sump.
IMPORTANT NOTE: Readjust the cables if
necessary. See Jobs 7 and 8.
Q Step 7: Refill the transmission with
automatic transmission fluid. See Chapter
3,
Facts and
Figures.
Job 7. Kickdown cable (automatic
transmission) - adjustment.
Refer to the illustrations in Job 6.
Q Step 1: Check that the slow running speed is correct and
the accelerator cable is correctly adjusted, with just a small
amount of slack.
Q Step 2: Disconnect the kickdown cable from the idler
pulley and ensure that it is perfectly free in its operation.
• Step 3: With the selector lever in 'P', start the engine and
let it idle.
Q Step 4: Pull the inner cable by hand until resistance is felt,
caused by the compression of the valves. The cable end should
now line up with its locating slot in the idler pulley
-
if not,
adjust nuts (7) and (8).
[_l Step 5: Reconnect the cable and then switch off the
engine.
• Step 6: Check that when the accelerator pedal is hard
down, there is
1
mm of further movement left on the
kickdown cable, otherwise, make further adjustments on nuts
(7) and (8).
Refer to illustration Job 6, Step 3.
• Step 1: Raise the car and support it securely on axle stands.
• Step 2: Remove the cover from the gear selection
mechanism and familiarise yourself with the drawing referred
to here.
Q Step 3: Manually select the 'P' (park) position, using the
lever beneath the gearchange (see illustration Job
6-3,
part
6).

• Step 4: Disconnect the cable from the selector eyelet (3)
and detach from the slot in the front end of the bracket (5).
Q Step 5: Disconnect the inner cable from the gearlever (6)
and release the outer casing from its gearbox mounted
bracket (7). Remove the cable.
Q Step 6: Ensure that 'P' (park) is still engaged by moving
the gearlever (6
-
beneath the car) fully rearward.
IMPORTANT NOTE: When 'Park' is properly engaged you
will not be able to turn both front wheels in the same
direction at the same time. This is because the trans-
mission should be 'locked' when 'park' is engaged.
• Step 7: Connect the new cable at the bracket (7) and
then at the bottom of the gear lever (6).
• Step 8: Feed the other end of the cable through to the
inside of the car and fix the outer casing into the slot in
bracket (5).
• Step 9: Put the interior selector lever (2) in the 'P' (park)
position and with the inner cable taut, check that the eyelet
(3) aligns perfectly with the selector pin.
• Step 10: If necessary, slacken the adjustment nut (4) and
adjust the position of the eyelet (3) accordingly. Fit the eyelet
to the pin and tighten the nut (4).
• Step 11: Check that the gears engage in their correct
positions on the selector indicator.
T "I FACT FILE: CHECKING AUTOT
qp- TRANSMISSION SELECTION
EL
-
• Now that you have completed the
installation, and BEFORE USING THE
VEHICLE ON THE ROAD, carry out the
following check:
• The engine should only start when you have selected
either 'P' (park), or 'N' (neutral).
• The gear lever selector positions should agree with
those indicated on the display panel.
• When 'R' (reverse) is selected, the reverse light
should come on. With the ignition switched off, the
buzzer should sound if any position other than 'P'
(park) is selected.
Q Step 12: Refit the selection mechanism cover.
0
Job 6-5

SAFETY FIRST!
Step 1: Take note of the location and identification of the

main
components:
Q Step 2: Before starting to remove the unit, unplug all of

the
distributor cap
HT
leads.
M | The TDC and RPM sensor (illustration Job 4-
1, part 4) is correctly positioned during
production and its (adjustable) mounting
plate should not be moved. (In fact, the sensor can be
removed from and refitted to the mounting plate - only the
latter is adjustable.) To prevent the plate from being moved
accidentally, one of the bolts holding the mounting plate to
the engine is of the 'shear' type and has no flats. If there is a
need to adjust the sensor mounting plate, special FIAT tool
1895898000 is required and this then becomes a job for your
FIAT dealer, who will also replace the shear bolt.
• Step 8: FACT FILE: TOP DEAD
CENTRE/RPM SENSOR

PRECAUTIONS -
To be taken when working on a car

with this system:
i) - Never
attempt to start the car with poor battery
connections.

ii) - Do
not use a fast charger to start the engine.

iii) -
Don't disconnect the battery while the engine is
running.

iv) -
Before fast charging
-
disconnect the battery.

vj - Remove
the ECU (electronic control unit) before

putting
the car in a bodyshop paint oven over
80
degrees Celsius.
vi) -
Make sure the ignition is OFF before plugging in

or unplugging
the ECU multi-plug.

vii) -
When electric welding
-
disconnect the battery.
Q Step 5: Turn the engine so that No. 4 piston is at TDC
(compression stroke). See Chapter
5,
Servicing Your Car,
Job 25 Refit the distributor in the reverse order of removal1
with the nuts just loose enough to allow ration of the
distributor body.
• Step 6: E3 INSIDE INFORMATION! At this point a FIAT
agent would fit tool No.1895896000 (1) to the distributor
body and rotate it until the centre of the rotor arm (2) is
aligned with the '0' reference mark on the tool. If such a
tool is not for hire, exactly align the two halves of the
previously scribed mark. This will do the same job
providing the distributor was correctly positioned in the
first place! Tighten the securing nuts. Q
• Step 7: Refit the distributor cap and HT leads.
Job S. Electronic ignition.
FACT FILE: BREAKERLESS INDUCTIVE
DISCHARGE AND DIGIPLEX 2 ALL
ELECTRONIC IGNITION SYSTEMS
Unfortunately, it is not possible to check
either of the two systems described in this
manual without the use of the correct FIAT
diagnostic equipment. If your engine is malfunctioning and
you suspect the ignition, ask your FIAT agent to check it.
109
• Step 3:

Paint a
mark

across
the
distributor
mounting and

spacer lug
to

retain
the exact
positioning when
refitting. Note

the position
of

the rotor,
undo

the three
distributor securing nuts. Remove the vacuum pipe

from the
stub (arrowed). Withdraw the distributor.
• Step 4: If

the
mounting

spacer
is
removed, make

sure
it
is
refitted

with the
recess
(arrowed) facing
downwards.