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6A1-12
1977 PONTIAC SERVICE MANUAL
I
Fig. 6A1-29 Replacing Camshaft Bearings
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Fig. 6A1-26 Measuring Camshaft Lobe Lift
Fig. 6A1-30 Camshaft Bearing Alignment
Fig. 6A1-27 Camshaft Removal Tool Installed
Fig. 6A1-28 Depressing Valve Lifters
5. Remove camshaft cover as previously outlined.
6. Disconnect fuel line at carburetor.
7. Remove Pulse A.I.R. tubing.
8. Remove EGR thermal vacuum switch.
9. Remove ignition distributor.
10. Raise the car on a hoist, then disconnect the endne
from mounts at body attachment. Raise front of engineand
install wood blocks, approximately 1 1/2 inches thick,
between engine mounts and body then lower the car.
1 1. Install camshaft removal Tool J 2359 1 (Fig. 6A1-27)
to cylinder head as follows:
a. Position Tool J 23591 to cylinder head so that
attaching holes align with cam cover lower attaching holes.
NOTE: Make sure all valve cover gasket material is
removed from the cylinder head so that the tool seats
properly.
b. Align valve lifter depressing levers on Tool J 23591
so that each lever will depress both the intake and exhaust
valve for their respective cylinder (lever should fit squarely
in notches adjacent to valve lifters).
c. With Tool J 23591 aligned as in Step b, make sure
screws in bottom of tool are backed-off so that they do not
make contact with bosses beneath tool.
d. Install hardened screws, supplied with tool, to attach
J 23591 to cylinder head; torque screws securely.
e. Turn screws in bottom of tool downward until they
just seat against corresponding bosses on cylinder head.
f. Apply a heavy body lubricant to ball end of lever
depressing screws and tighten screws to depress the valve
lifters.
NOTE: .Set engine timing mark to 12 o'clock before
depressing valves. Use a torque wrench on pivot arm
screws (Fig. 6A 1-28).
DO NOT EXCEED 12 Ibs. ft. OF TORQUE to
depress valves. If more than 12 lbs. ft. is required, check
tool for proper installation then proceed cautiously to
prevent damage to depressing lever.
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