Pontiac FIREBIRD 1972 Service Manual page 589

V-8 ENGINE 6-77
and timing chain cover on all but 307 engines is
retained and re-installed during assembly.
11. On all.but 307 engine, remove push rod cover.
12. Loosen rocker arm ball retaining nuts so that rocker
arms can be disengaged from ~ u s h rods and turned
sideways.
13. 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.
14. Remove harmonic balancer.
15. Remove fuel pump (and pushrod
-
307 engine).
16. Remove four oil-pan-to-timing-chain-cover screws
(all except 307 engine) or remove oil pan (307 en-
gine).
17. Remove timing chain cover and gasket.
18. On all but 307 engine, remove fuel pump eccentric
and fuel pump bushing.
19. Align timing marks on timing chain sprockets and
remove timing chain and sprockets. Refer to Figs.
6-127 and 6-128.
20. Remove camshaft thrust plate.
2 1. Carefully pull camshaft from engine, exercising cau-
tion so as not to damage bearings in block.
On 307 engine, it will be necessary to install two
5/16"
-
18 x 4" bolts in camshaft bolt holes to remove
camshaft.
The clearance for camshaft removal is very limited
and, in cases where engine mounts are worn exces-
sivel'
it may be necessary to raise the front of the
engine to permit removal.
22. Stuff clean rags through openings in engine block as
an aid in preventing foreign material or parts of bear-
ing remover tool from dropping into block.
CAUTION: It is imperative that operator exer-
cise extreme caution when inserting bearing
remover adapters or key through openings in
engine block to prevent them from dropping
into engine.
CAMSHAFT BEARING
REMOVE
1. All except 307 Engine:
Fig. 6-13 1 Positioning Index Collar
ing to act as a support for shaft J 6173- 1 (Fig.
6-131).
I f front bearing is to be replaced, insert installer
adapter in center bearing to act as support for
shaft.
I f rear bearing is to be removed, it will be neces-
sary to remove camshaft rear plug.
b. Insert replacer adapter J 6 173-3 into rear of bear-
ing to be removed so that shoulder on remover
bears against rear edge of bearing.
c. Place indexing collar J 6173-6 on threaded end of
shaft with open side toward unthreaded end and
start thrust washer and nut on shaft (Fig. 6-13 1).
d. Insert shaft and indexing collar through remover
and replacer adapters and position lug on index-
a. Insert remover adapter J 6173-4 into front bear-
Fig. 6-1 3 2 Removing Camshaft Bearing