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6A2-14
1 9 7 7 PONTIAC SERVICE MANUAL
8. Remove hub as described and remove timing gear
cover.
9. Remove the two camshaft thrust plate screws by
working through holes in the camshaft gear (Fig. 6A2-29).
Fig.
6A2-29
Removing Camshaft Thrust Plate Screws
10. Remove the camshaft and gear assembly by pulling
it out through the front of the block. (Support shaft carefully
when removing so as not to damage camshaft bearings).
Disassemble
1. If the gear must be removed from the shaft, use press
plate and adaptor J-97 1 on press.
2. Place tools on table of a press. Place the camshaft
through the opening in the tools. Press shaft out of gear using
socket or other suitable tool (Fig. 6A2-30).
C A UTI 0 N: Thrust plate must be so positioned
that woodruffkey in shaft does not damage it when
the shaft is pressed out o f gear.
Assemble
To assemble camshaft gear, thrust plate and gear spacer
ring to camshaft, proceed as follows:
1. Firmly support shaft at back of front journal in an
arbor press using press plate adaptors.
2. Place gear spacer ring and thrust plate over end of
shaft, and install woodruff key in shaft keyway.
3. Install camshaft gear and press it onto the shaft until
it bottoms against the gear spacer ring. The end clearance of
the thrust plate should be .0015" to .0050" (Fig. 6A2-31). If
less than .00 15 ", the spacer ring should be replaced. If more
than .0050", the thrust plate should be replaced.
Replace
1. Install the camshaft assembly in the engine block,
being careful not to damage bearings or cam .
2. Turn crankshaft and camshaft so that the valve timing
marks on the gear teeth will line up. Install camshaft thrust
plate to block screws and tighten to 75 lb. in.
3. Install timing gear cover and gasket.
4. Install hub.
5. Line up keyway in hub with key on crankshaft and
slide hub onto shaft. Install center bolt and torque to 160 lb.
ft.
Fig.
6A2-30
Removing Camshaft Timing Gear
Fig.
6A2-3 1
Installing Camshaft Timing Gear and
Checking Thrust Plate End Clearance
6. Install valve lifters and push rods. Install side cover
with a new gasket. Install distributor as follows:
Turn crankshaft to firing position of number one
cylinder (number one exhaust and intake valve lifters both
on base circle of camshaft and timing mark on harmonic
balancer indexed with top dead center mark on timing pad).
Install distributor in its original position and align shaft
so that rotor arm points toward number one cylinder spark
plug contact. It will also be necessary to turn oil pump drive
shaft so it will index with distributor shaft.
7. Install fuel pump.
8. Pivot rocker arms over push rods. With lifters on base
circle of camshaft, tighten rocker arm nut.
9. Install spark plugs.
10. Add oil to engine. Install water pump pulley and fan
belt and adjust using tension gage.
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