Tools Required

1. Remove the engine flywheel. Refer to Engine Flywheel Replacement .




Important: Rear crankshaft seal removal cannot be performed on an engine stand. If the engine is out of the vehicle, properly support the engine on a bench or on the floor. If the engine is in the vehicle the seal can be removed after the transaxle and engine flywheel are removed.

2. Place theJ 42841-A onto the crankshaft.
3. Install the J 42841-A retaining bolts.



4. Using a drill motor (variable speed preferred) with a socket adapter, install 8 one-inch 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 J 42841-A retaining bolts.



6. Install the center forcing screw.



7. Tighten the center screw on the removal tool to pull the seal assembly off the end of the crankshaft.

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 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 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.



5. Lubricate the outer rubber surface (1) of the crankshaft rear oil seal with clean engine oil.

Important: It is not necessary to completely unthread the center bolt and separate the two pieces of the J 42842 .

6. Loosen the center bolt of the J 42842 until the center hub protrudes approximately 13 mm (0.50 in) beyond the outer plate.



7. Install the J 42842 to the rear of the crankshaft.



8. Thread the 3 mounting bolts into the crankshaft flange.
9. Tighten the bolts until the J 42842 is firmly mounted on the crankshaft.



10. Install the crankshaft rear oil seal by tightening the center bolt until the J 42842 bottoms against the crankcase.
11. Loosen the center bolt to release pressure on the crankcase.



12. Loosen the 3 mounting bolts.
13. Remove the J 42842 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 42842 and repeat the installation procedure.
15. Install the engine flywheel. Refer to Engine Flywheel Replacement .