Group 21 Service procedures - engine
55
Timing gears, removing
(with the timing gear cover removed)
Special tools: 999 3590, 999 2658, 884994
The following method should be used to avoid damaging the
valve mechanism:
1
2
13
Install the coolant pump sealing ring retainer. See: Front
sealing ring for coolant pump, replacing”.
14
Fit the pulley and the outer torsional vibration damper (if
any). Torque 48 Nm (44.3 ft-lb)
Note: Check the condition of the sealing ring and the wear
ring.
15
Install:
The fan hub, the fan and the fan belts. The alternator
driving pulley on the coolant pump axle. The alternator
bracket and the alternator drive belts. The radiator along
with hoses and connections.
Connect the electrical wires to the alternator.
16
Fill up with coolant and set the electrical circuit breaker in
”on” position. Check to make sure that there are no leakag-
es.
Remove the plug in the flywheel. Fit tool 999 3590. Re-
move the inspection cover for the camshaft on the rear of
the engine. Rotate the engine until the marked hole on the
camshaft’s end is pointing up. See figure.
Undo the central screw on the polygon hub. Counter with
tool 999 3590. Pull off the polygon hub with tool 884994.
4
Release the tension in the camshaft drive’s screws.
Note: The camshaft must be fixed. If the motor is rotated,
the valves can be damaged if it is not synchronized with the
camshaft. The camshaft drive should be removed last.
Remove the vibration damper.
3
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