Pontiac FIREBIRD 1972 Service Manual page 555

SIX CYLINDER ENGINE 6-43
9. Install coil and push rod covers.
10. Install push rods, move rocker arms into position and
tighten rocker arm nuts.
11. With lifter on base circle of camshaft, tighten rocker
arm nut until all valve train play is removed. Tighten
nut one additional turn.
12. Install spark plugs.
9. Remove connecting rod bearing caps with bearings
and identify each for reinstallation.
10.
Push connecting rod and piston assemblies away
from crankshaft.
11. Remove main bearing caps with bearings and identify
for reinstallation.
12. Remove crankshaft.
13. Install rocker arm cover.
REPLACE
CRANKSHAFT
REMOVE
1. Remove engine from vehicle.
2. Mount engine on suitable stand.
3.
Remove spark plugs.
4. Remove fan and fan pulley.
5. Remove harmonic balancer using tool 5-6978.
6. Remove oil pan and oil pump assembly.
7. Remove timing gear cover.
8. Remove crankshaft timing gear with tool 5-6978 (Fig.
6-7
1).
1. With upper bearings installed position crankshaft in
block.
2. Install main bearing caps (with lower bearings), but
do not tighten cap bolts.
3. Pull connecting rods (with upper bearings installed)
and pistons into place.
4. Install rod bearing caps (with bearings), but do not
tighten nuts.
5. With rubber mallet hit both ends of crankshaft to
center thrust bearing.
6. Tighten main bearing caps to 65 lb. ft.
7. Tighten connecting rod bearing caps to 35 lb. ft.
8. Install key from old crankshaft keyway in new crank-
shaft.
9. Install crankshaft timing gear with installer tool J-
5 154 (Fig. 6-72).
Fig.
6-7
1 Removing Crankshaft Timing Gear
Fig. 6-72 Installing Crankshaft Timing Gear