Chevrolet LIGHT DUTY TRUCK (SERIES 10-35) Service Manual page 487

6 A 1-26 IN-LINE 6
Fig. 6A 1-35--Removing Oil Seal Low er H a lf- T y p ic a l
rear main bearing cap.
2. Remove oil seal from the bearing cap by prying from
the bottom with a small screw driver (fig. 6A1-35).
3. 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. 6A1-
36).
4. Clean all sealant and foreign material from cylinder
case bearing cap and crankshaft, using a nonabrasive
cleaner.
5. Inspect components for nicks, scratches, burrs and
machining defects at all sealing surfaces, case assembly and
crankshaft.
6 . Coat seal lips and seal bead with light engine oil -
keep oil off seal mating ends.
7. Position tip of tool between crankshaft and seal seat
in cylinder case.
8 . Position seal between crankshaft and tip of tool so
that seal bead contacts tip of tool.
Make sure that oil-seal lip is positioned
NOTICE:
toward front of engine (fig. 6A1-37).
Fig. 6A 1-36-Removing Oil Seal Upper H a l f - T y p i c a l
L IG H T TR U CK SER V ICE MANUAL
9. Roll seal around crankshaft using tool as a "shoe­
horn" to protect seal bead from sharp corner of seal seat
surface in cylinder case.
CAUTION: Installation tool must remain
in position until seal is properly positioned
with both ends flush with block.
10. Remove tool, being careful not to withdraw seal.
11. Install seal half in bearing cap, again using tool as
a "shoe-horn", feeding seal into cap using light pressure
with thumb and finger.
12. Install bearing cap to case with sealant applied to
the cap-to-case interface being careful to keep sealant off the
seal split line (fig. 6A1-38).
13. Install the rear main bearing cap (with new seal)
and torque to 10-12 lb. ft. (14-16 N-m). Tap end of
crankshaft first rearward then forward with a lead hammer.
This will line up rear main bearing and crankshaft thrust
surfaces. Retorque bearing cap to 65 lb. ft. (
Fig. 6 A 1-38-Sealing Bearing Cap - Typical
N-m).
88
APPLY
SEALANT
TO SHADED
AREAS ONLY