Rear Oil Seal (Late)

Crankshaft Rear Oil Seal Replacement (Late)

Tools Required

^ J42841 Crankshaft Rear Oil Seal Remover

^ J 44642 Crankshaft Rear Oil Seal Installer


Removal Procedure

1. Remove the flywheel.





2. Place the J42841 on to the crankshaft.

3. Install the J42841 retaining bolts.





4. Using a drill motor, variable speed preferred, with a socket adapter, install eight 25 mm (1.0 in) self-drilling screws into the seal using the guide holes in the removal tool. When drilling, make sure you reduce the drill speed when the screw begins threading into the seal.





5. With all 8 removal screws installed, remove the J42841 retaining bolts.





6. Install the center forcing screw.





7. Tighten the center screw on the J42841 to pull the seal assembly oft the end of the crankshaft.


Installation Procedure





Important: Make sure the drain is clear before installing the new crankshaft rear oil seal. Failure to clear the drain could cause the crankshaft rear oil seal to leak.

1. Clean any debris from the crankshaft rear oil seal drain (1) using wire or an unbound plastic tie-wrap (2).

2. Place a small amount of Gasket Maker, GM P/N 1052942 (Canadian P/N 10953466) or equivalent, at the crankcase split line across the end of the upper/lower crankcase seal.

3. Coat the outer diameter of the cylinder block crankshaft rear oil seal area with clean engine oil GM P/N 12345501 (Canadian P/N 992704) or equivalent.





Important: DO NOT allow any engine oil on the area where the crankshaft rear oil seal is to be pressed onto the crankshaft. The green coating pre-applied to the inner diameter of the crankshaft rear oil seal must not be contaminated.

4. Wipe the outer diameter of the flywheel flange clean with a lint-free cloth.

Important: DO NOT put any engine oil on the green coating pre-applied to the inner diameter of the crankshaft rear oil seal. This coating is a sealant that must not be contaminated.

5. Lubricate the outer rubber surface (1) of the crankshaft rear oil seal with clean engine oil GM P/N 12345501 (Canadian PIN 992704) or equivalent.





6. Loosen the center bolt of the J 44642 until the center hub protrudes approximately 13 mm (0.5 in) beyond the outer plate. It is not necessary to completely unthread the center bolt and separate the 2 pieces of the J 44642.

7. Install the J 44642 to the rear of the crankshaft.





8. Thread the 2 mounting bolts into the crankshaft flange.

9. Tighten the bolts until the J 44642 is tirmly mounted on the crankshaft.





10. Install the crankshaft rear oil seal by tightening the center bolt until the J 44642 bottoms against the crankcase.

11. Loosen the center bolt to release pressure on the crankcase.





12. Loosen the 2 mounting bolts.

13. Remove the J 44642 from the crankshaft flange.

14. Inspect to ensure the installation depth is equal around the crankshaft rear oil seal's circumference.

^ If the depth is not equal reinstall the J 44642 and repeat the installation procedures.

15. Install the flywheel.