Pontiac FIREBIRD 1972 Service Manual page 585

V-8 ENGINE 6-73
Fig. 6-1
22
Harmonic Balancer
-
Typical
On all but 307 engine, remove harmonic balancer by
sliding it off end of crankshaft.
On 307 engines, install tool J-23523 to harmonic ba-
lancer and turn puller screw to remove balancer from
crankshaft (Fig. 6-123).
Remove tool on 307 engine.
Remove crank pulleys and reinforcing plate.
CAUTION: Do not pry on O.D. of harmonic
balancer. Hamonic balancer is a rubber
mounted inertia member and balance could be
affected.
All except 307 Engine:
a. Install new harmonic balancer by reversing above
steps, lining up keyway in balancer with key on
crankshaft.
b. Tighten harmonic balancer attaching bolt to 160
lb. ft. (Remove flywheel cover and lock flywheel
before tightening balancer bolt).
L J
Fig. 6-1 23 Removing Harmonic Balancer
9. 307 Engine:
C AUTI 0 N: It is necessary to use installer tool
to prevent the inertia weight section from walk-
ing o f f the hub during installation of balancer.
a. Coat front cover seal contact area (on balancer)
with engine oil.
b. Place balancer in position over key on crankshaft.
c. Pull balancer onto crankshaft as follows:
1. Install appropriate threaded end of tool J-
23952 into crankshaft (Fig. 6-124).
CAUTION: Install tool in crankshaft so that at
least l/2" of thread engagement is obtained.
2. Position balancer on crankshaft, aligning ba-
lancer with key on crankshaft.
3. Install plate, thrust bearing and nut to com-
plete tool installation.
4. Pull balancer into position.
d. Remove tool from crankshaft.
e. Install balancer retaining bolt and torque to 60 lb.
ft., then install accessory drive pulley.
f. Install fan pulley and fan.
Fig. 6-1
2 4
Installing Harmonic Balancer