117. Crankshaft Rear Oil Seal Installation

Crankshaft Rear Oil Seal Installation

Tools Required
^ J45930-A Crankshaft Rear Oil Seal Installer





Important: Crankshaft rear oil seal and engine flywheel installation requires adequate space for installation. If the engine stand does not allow suitable space to use the J45930-A install the crankshaft rear oil seal and engine flywheel with the engine properly supported on the floor or on a bench.

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

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.

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 P/N 992704) or equivalent.

Important: It is not necessary to completely unthread the center bolt and separate the two pieces of the J45930-A.

6. Loosen the center bolt of the J45930-A until the center hub protrudes approximately 13 mm (0.500 inch) beyond the outer plate.





7. Install the J45930-A to the rear of the crankshaft.





8. Thread the 3 mounting bolts into the crankshaft flange.
9. Tighten the 3 mounting bolts until the J45930-A is firmly mounted on the crankshaft.





10. Install the crankshaft rear oil seal by tightening the center bolt until the J45930-A bottoms against the crankcase.
11. Loosen the center bolt to release pressure on the crankcase.





12. Loosen the 3 mounting bolts.
13. Remove the J45930-A 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 J45930-A and repeat the installation procedures.