Positioning Index Collar; Removing Camshaft Bearing - Pontiac Grand Prix Service Manual

V-8 ENGINE
6-57
8. Remove distributor hold-down clamp and remove
distributor.
9. Remove intake manifold and gaskets.
NOTE: Make certain O-ring seal between intake
manifold and timing chain cover is retained and
installed during assembly.
10. Remove push rod cover.
11. Loosen rocker arm ball retaining nuts so that
rocker arms can be disengaged from push rods and
turned sideways.
12. Remove push rods and hydraulic lifters. Store push
rods in stand and lifters in a lifter box so they can be
reinstalled in original positions.
13. Remove harmonic balancer.
14. Remove fuel pump.
21. Stuff clean rags through openings in engine block
as an aid in preventing foreign material or parts of
bearing remover tool from dropping into block.
CA UTION: It is imperative that operator exercise
extreme caution when inserting bearivg remover
adapters or key through openings in engine block to
prevent them from dropping into engine.
CAMSHAFT BEARING
-
REMOVE
1. Insert remover adapter J 6173-4 into front bearing
to act as a support for shaft J
6173- 1 (Fig. 6-98).
NOTE: Iffront bearing is to be replaced insert installer
adapter in center bearing to act as support for shafi.
2. Insert replacer adapter J 6173-3 into rear of bearing
to be removed so that shoulder on remover bears
against rear edge of bearing.
NOTE: If rear bearing is to be removed, it will be
necessary to remove camshaft rear plug.
15. Remove four oil-pan-to-timing-chain-cover screws.
3. Place indexing collar J 6173-6. on threaded end of
shaft with open side toward unthreaded end and start
16. Remove timing chain cover and gasket.
thrust washer and nut on shaft (Fig. 6-98).
17. Remove fuel pump eccentric and fuel pump
4. Insert shaft and indexing collar through remover
bushing.
and replacer adapters and position lug on indexing
collar in ventilator hole in front of block (Fig. 6-98).
18. Align timing marks on timing chain sprockets and
This indexes shaft so that it cannot rotate.
remove timing chain and sprockets.
5. Slip key J 6173-5 into notches in shaft behind
19. Remove camshaft thrust plate. bearing to be removed (Fig. 6-99).
20. Carefully pull camshaft from engine, exercising 6. Turn nut on front of shaft to pull key against
caution so as not to damage bearings in block. remover adapter J 6173-4, then continue to turn nut
NOTE: The clearance for camshaft removal is very
until bearing is pulled out of its hole.
limited an4 in cases where engine mounts are worn
CAMSHAFT BEARING - REPLACE
excessively, it may be necessary to raise the front of the
engine to permit removal.
1. Place a clean rag against each side of transverse
member just below bearing hole to catch any shavings
Fig. 698 Positioning Index Collar Fig. 6-99 Removing Camshaft Bearing