Pontiac firebird 1968 - Page 271

6-54
1968 PONTIAC SERVICE MANUAL
remove power steering pump belt from harmonic
balancer.
2. Position fan so wide angles will be at top and
bottom allowing access to balancer (Fig. 6-93).
3. Remove crank pulleys and reinforcing plate.
4. Remove harmonic balancer attaching bolt and
retainer washer.
5. Remove harmonic balancer by sliding It off end
of crankshaft.
NOTE: DO NOT PRY ON O.D. OF HARMONIC
BALANCER. HARMONIC BALANCER IS A RUB-
BER MOUNTED INERTIA MEMBER AND BAL-
ANCE COULD BE AFFECTED.
6. Install new harmonic balancer by reversing
above steps, lining up keyway in balancer with key
on crankshaft.
7. Tighten harmonic balancer, attaching bolt to
160 lb. ft. torque.
NOTE: Remove flywheel cover and lock flywheel
before tightening balancer bolt.
TIMING CHAIN COVER SEAL-
REMOVE AND REPLACE
1. Loosen generator adjusting bolts.
2. Remove fan and accessory drive belts.
3. Remove harmonic balancer.
4. Remove timing chain cover seal by prying out
of bore with a pry bar (Fig. 6-94).
5. Install new seal with lip of seal inward, using
seal installer J 21147.
6. Replace harmonic balancer.
7. Install drive belts and adjust to proper tension.
TIMING CHAIN COVER, GASKET, OR
FUEL PUMP ECCENTRIC-
REMOVE AND REPLACE
1. Drain radiator and cylinder block.
2. Loosen generator adjusting bolts.
3. Remove fan belt and accessory drive belt.
4. Remove fan and pulley from hub of water pump.
5. Disconnect lower radiator hose.
6. Remove fuel pump.
7. Remove harmonic balancer.
8. Remove front four oil-pan-to-timing-chain cover
screws.
9. Remove timing chain cover to block attaching
bolts and nuts and timing chain cover to intake
manifold bolt.
10. Pull timing chain cover forward to clear studs
and remove.
11. Remove O-ring seal from recess in intake
manifold water recirculation passage.
12. Remove timing chain cover gasket and thor-
oughly clean gasket surfaces on block and cover.
Use care to prevent gasket particles and other
foreign material from falling into oil pan.
. . 1
CRANKSHAFT TIMING CHAIN
Fig. 6-93 Harmonic Balancer Fig. 6-94 Timing Chain Cover Seal