543411
Replacing water pump - alternator
drive belt
If this is not so, turn the screw (7) appropriately. Lock the
screws (4 and 6) at the required tightening torque.
Unscrew the screw (7) by two turns and lock the nut (8) at
the required torque.
Mount the radiator assembly and the remaining parts as
described for refitting the engine assembly.
Disassemble the compressor drive belt, if there is one, as
described under the relevant heading.
Cancel the action of the automatic tightener (2) with the
screw (3) and remove the water pump - alternator drive belt
(1).
Figure 13
543910
Replacing air-conditioning compres-
sor drive belt
Disassembly
Set the vehicle on a lift or over a pit.
From underneath the vehicle, detach the central
soundproofing guard.
Loosen the screws (4 and 6) fixing the tensioner (5) and the
nut (8).
Remove the belt (10) driving the compressor.
50958
Mount the drive belt (10), taking care to position its
ribs properly in the respective races of the pulleys.
Turn the screw (7) to lightly tension the belt (10).
Turn the crankshaft by one turn. Using the ap-
propriate instrument, check that in section B, com-
pressor/crankshaft, the frequency is 160
±10 Hz,
corresponding to a load of 500
± 50 N.
Assembly and adjusting belt tension
Disassembly
Assembly and adjusting belt tension
Mount the drive belt (1) taking care to position its ribs
correctly in the respective races of the pulleys.
Turn the screw (3) to release the automatic tightener (2).
Turn the crankshaft by one turn to settle the belt.
With suitable equipment, measure the tension of the belt (1)
in the section A, crankshaft / water pump / alternator, that
should be 140
± 5 Hz.
Mount the compressor drive belt, if there is one, and adjust
the tension as described under the relevant heading.
543411
Changing the timing system driving
belt
Disassembly
Following the procedures described for removing the engine,
take out the radiator assembly without disconnecting the
air-conditioning system pipes from the condenser and from
the drier filter and put it suitably aside in the engine bay.
For this operation it is not necessary to remove the
bumpers, it is sufficient to remove the air duct from
the radiator and, for vehicles with engine 8140.63,
to remove the screws securing the intake filter air
inlet to the radiator.
NOTE
ENGINES 8140
17
D
AILY
Base - May 2004