Rear Crankshaft Main Bearing Seal: Service and Repair

Removal Procedure

^ Tool Required
- J 42067 Rear Main Oil Sealer Installer
- J 36660-A Torque/Angle Meter.
- J 42098 Crank Hub Torx Socket.





1. Remove the transmission. Refer to Transmission Replacement in Transmission and Drivetrain.
2. Counterhold the crankshaft with J42098 and remove the flywheel bolts.
3. Remove the flywheel from the crankshaft.





4. Center punch the steel ring of the rear main oil seal.

Important: Use caution when drilling the hole so as not to damage the engine components on the opposite side of the rear main oil seal.

5. Carefully drill a small, shallow, pilot hole into the steel ring of the rear main oil seal.
6. Screw in a self-tapping screw.
7. Use pliers to pull the rear main oil seal out.
8. Clean all sealing surfaces.

Installation Procedure





1. Coat the lip of the rear main oil seal with a small amount of chassis grease, GM P/N 12377985 or equivalent.
2. Use the J 42067 to install the rear main oil seal.
3. Clean the rear crankshaft flange.





4. Install the flywheel to the crankshaft.

Notice: Refer to Fastener Notice in Service Precautions.

Important:
^ Use new flywheel bolts.
^ Coat the new flywheel bolts with thread retaining compound, GM P/N 12345493 or equivalent.

5. Install the flywheel bolts.
^ Counterhold the crankshaft with J42098.
^ Use the J 36660-A to tighten the flywheel bolts to 65 Nm (48 ft. lbs.) on the first pass, 30 degrees on the second pass and 15 degrees on the third pass.
6. Install the transmission. Refer to Transmission Replacement in Transmission and Drivetrain.