Rear Crankshaft Main Bearing Seal: Service and Repair

REMOVAL PROCEDURE





1. Remove the transmission. Refer to Transmission Replacement in Automatic Transmission.
2. Remove the flywheel. Refer to Engine Flywheel Replacement.
3. Remove the rear crankshaft oil seal using the following procedure:
3.1. Drill a 1/8 inch hole in the metal body of the seal.
3.2. Use a slide hammer to remove the seal.

4. Seal removal with a flat blade screwdriver between the seal lip and the crankshaft is also possible but extreme care is required in order to avoid damage to the crankshaft sealing surface.

INSTALLATION PROCEDURE

^ Tools Required
- J 38817 Rear Main Seal Installer





1. Place a small amount of GM Gasket Maker, GM P/N 1052942 or equivalent, at the crankcase split line across the end of the upper/lower crankcase seal.
2. Lubricate the rear main seal sealing lips with clean engine oil.





3. Slide the seal over the arbor of the J 38817. The garter spring should face the engine.
4. Thread the J 38817 into the crankshaft flange.
5. Install the seal by turning the handle until the tool bottoms against the crankcase.
6. When properly installed, the outer surface of the seal should be 0.5 mm below the surface of the engine block.
7. Install the flywheel. Refer to Engine Flywheel Replacement.
8. Install the transmission. Refer to Transmission Replacement in Automatic Transmission.