Pontiac FIREBIRD 1972 Service Manual page 596

6-84 1972 PONTIAC SERVICE MANUAL
j.
Remove the cap and inspect the parting line to
,
insure that no seal material has been compressed
between the block and the cap. Clean as neces-
sary.
k. Apply a 1/16" bead of sealer from the center of
seal across to the external cork groove.
1. Reassemble the cap. Tighten to 120 1b. ft.
5. Upper Seal
-
307 Engine.
Remove oil seal from the bearing cap by prying
from the bottom with a small screw driver (Fig.
6- 143).
To remove the upper half of the seal, use a small
hammer to tap a brass pin punch on one end of
seal until it protrudes far enough to be removed
with pliers (Fig. 6-144).
Clean all sealant and foreign material from cylin-
der case bearing cap and crankshaft, using a
nonabrasive cleaner.
Inspect components for nicks, scratches, burrs
and machining defects at all sealing surfaces, case
assembly and crankshaft.
Coat seal lips and seal bead with light engine oil
-
keep oil off seal mating ends.
Position tip of small screwdriver between crank-
shaft and seal seat in cylinder case.
Position seal between crankshaft and tip of small
screwdriver so that seal bead contacts tip of tool.
(Make sure that oil-seal lip is positioned toward
front of engine).
h. Roll seal around crankshaft using screwdriver as
a "shoe-horn" to protect seal bead from sharp
corner of seal seat surface in cylinder case.
i. Remove small screwdriver, being careful not to
withdraw seal.
j.
Install seal half in bearing cap, again using small
screwdriver as a "shoe-horn", feeding seal into
cap using light pressure with thumb and finger.
k. Install bearing cap to case with sealant applied to
the cap-to-case interface being careful to keep sea-
lant off the seal split line (Fig. 6-145).
1. Install the rear main bearing cap (with new seal)
and torque to 75 lb. ft.
6. Install baffle and oil pump.
7. Install oil pan (see OIL PAN
-
REMOVE AND
M A I N BEARINGS
REMOVE
1. Remove oil pan (see OIL PA
REPLACE).
N
-
REh AOVE AND
2. To gain access to bearing caps, remove oil baffle. To
gain access to rear main, remove oil pump in addition
to oil baffle.
3. Remove bearing cap of main bearing to be replaced.
4. Make a tool for removing upper half of bearing shell
as shown in Fig. 6-146.
Fig. 6-143 Removing Oil Seal (Lower Half) Fig. 6-144 Removing Oil Seal (Upper Half)