Camshaft And/Or Camshaft Bearing; Timing Chain And Sprockets - Pontiac Grand Prix Service Manual

6-56 1969
PONTIAC SERVICE MANUAL
11. Remove O-ring seal from recess in intake manifold
water recirculation passage.
12. Remove timing chain cover gasket and thoroughly
clean gasket surfaces on block and cover. Use care to
prevent gasket particles and other foreign material
from falling into oil pan.
13. Inspect front oil pan gasket and replace if
damaged. If new gasket is installed, it should be
cemented to oil pan.
14. If new fuel pump eccentric and bushing are to be
installed, remove camshaft sprocket retainer bolt and
retaining washer and remove the eccentric and
bushing. Place fuel pump bushing over eccentric with
rolled flange toward camshaft sprocket (Fig. 6-96).
NOTE:
Bushing retaining flange should be between
eccentric and sprocket for retention of bushing in
operation.
Install bushing and eccentric, indexing tang on
eccentric with keyway cutout in camshaft sprocket.
Insert retaining screw with retainer washer and tighten
securely.
15. Position new timing chain cover gasket over studs
and dowels against block.
16. Transfer water pump to new timing chain cover if
new cover is to be installed.
17. Install new O-ring seal in water recirculation
passage of intake manifold.
18. Position timing chain cover on engine indexing
over dowels, install bolts and nuts and tighten securely.
19. Install four oil pan to timing chain cover screws
and tighten to 12 lb. ft. torque.
20. Install harmonic balancer, retainer bolt with
retainer, and tighten to 160 lb. ft. torque.
2 1. Connect lower radiator hose to pump inlet.
22. Position pulley and fan on water pump hub and
install attaching bolts. Tighten to 20 lb. ft. torque.
23. Install power steering pump and belt on cars so
equipped.
24. Install generator adjusting strap.
25. Install fan belt and accessory drive belts. Adjust to
proper tension.
26. Install fuel pump.
27. Refill cooling system and check for leaks.
TIMING CHAIN AND SPROCKETS
-
REMOVE
AND REPLACE
1. Remove timing chain cover, making certain O-ring
seal and hollow dowels are retained for installation at
assembly.
2. Remove fuel pump eccentric, bushing and timing
chain cover oil seal.
3. Align timing marks to simplify proper positioning of
sprockets during reassembly (Fig. 6-97).
4. Slide timing chain and sprockets off ends of
crankshaft and camshaft.
5. Install new timing chain and/or sprockets, making
sure marks on timing sprockets are aligned exactly on
a straight line passing through the shaft centers (Fig. 6
97). Camshaft should extend through sprocket so that
hole in fuel pump eccentric will locate on shaft.
6. Install fuel pump eccentric and bushing, indexing
tab on eccentric with keyway cut-out in sprocket.
Install retainer bolt with retainer washer and tighten
securely.
7. Making certain hollow dowels are in place in block,
place timing chain cover gasket over studs and dowels.
8. Install timing chain cover, making sure O-ring seal
is in place.
CAMSHAFT ANWOR CAMSHAFT BEARING
The camshaft and camshaft bearings can be replaced
with engine installed in car or with engine removed
and disassembled for overhaul; however, to replace the
rear camshaft bearing without removing and com-
pletely disassembling engine, the propeller shaft,
transmission and clutch housing must first be removed.
To replace the camshaft and/or the rear center, center,
front center or front camshaft bearing without remov-
ing and completely disassembling the engine, proceed
as follows:
CAMSHAFT
-
REMOVE
1. Drain radiator.
2. Remove carburetor air cleaner.
3. Disconnect all water hoses, vacuum hose and spark
plug wires.
4. Disconnect carburetor linkage, fuel lines and wires
to thermogauge unit.
5. Remove hood latch brace.
6. On air-conditioned cars, remove generator mounting
bracket and generator.
7. Remove crankcase ventilator hose, and remove both
rocker arm covers and gaskets.