VIBRATION DAMPER
REMOVAL
(1) Disconnect negative battery cable.
(2) Remove accessory drive belt (Refer to 7 -
COOLING/ACCESSORY DRIVE/DRIVE BELTS -
REMOVAL).
(3) Install retaining lock for crankshaft/ring gear
(Fig. 28).
(4) Remove crankshaft center bolt and washer
(Fig. 28).
NOTE: If hub of belt pulley/vibration damper is
tight, use puller to remove. DO NOT tilt puller when
in use. Grooves of the puller must mesh fully into
the slots of the belt pulley.
(5) Remove the belt pulley/vibration damper (Fig.
28).
NOTE: If grooves can be felt in the belt pulley/vibra-
tion damper during inspection, the pulley/damper
must be replaced.
(6) Inspect hub at belt pulley/vibration damper for
wear grooves.
(7) Replace front crankshaft seal.
INSTALLATION
NOTE: Align parallel key, fix in place with grease.
Turn to ensure the slot is aligned with parallel key
in crankshaft.
NOTE: Front crankshaft seal must be replaced
before installing the belt pulley/vibration damper.
(1) Position the belt pulley/vibration damper.
(2) Install crankshaft center bolt and washer.
Tighten bolt in two stages. M8.8 bolt to 200N·m (148
lbs. ft.) then 90°, M10.9 bolt to 325N·m (240 lbs. ft.)
then 90°.
NOTE: Inspect accessory drive belt for wear.
Replace as necessary.
(3) Install accessory drive belt (Refer to 7 - COOL-
ING/ACCESSORY DRIVE/DRIVE BELTS - INSTAL-
LATION).
(4) Reconnect negative battery cable.
WARNING: USE EXTREME CAUTION WHEN THE
ENGINE IS IN OPERATION. DO NOT STAND IN A
DIRECT LINE WITH THE FAN. DO NOT PUT YOUR
HANDS NEAR THE PULLEYS, BELTS OR FAN. DO
NOT WEAR LOOSE CLOTHING.
(5) Start vehicle and inspect for leaks.
VACUUM PUMP
DESCRIPTION
The vacuum pump is operated by a slotted exten-
sion attached to the vacuum pump shaft. The vac-
uum pump shaft slotted extension fits into, and is
driven by, the exhaust camshaft gear.
The vacuum pump is a constant displacement,
vane-type pump. Vacuum is generated by vanes
mounted in the pump rotor. The rotor is located in
the pump housing and is pressed onto the pump
shaft.
The vacuum pump rotating components are inter-
nally lubricated.
The vacuum pump is not serviceable and must be
replaced as a unit. Do not disassemble or attempt to
repair the pump.
Fig. 28 VIBRATION DAMPER/CRANKSHAFT PULLEY
1 - SPECIAL TOOL #8932
2 - RETAINING BOLTS
3 - VIBRATION DAMPER/CRANKSHAFT PULLEY
4 - WASHER
5 - CRANKSHAFT BOLT
WG ENGINE 9a - 39
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