Tools Required

J 38817-A 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-A . The garter spring should face the engine.
4. Thread the J 38817-A 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.