Tools Required

1. Remove the timing belt. Refer to Timing Belt Replacement .
2. Remove the crankshaft gear bolt while counterholding with J 42065 .
3. Remove the crankshaft gear and collar.



4. Carefully drill a small, shallow, pilot hole into the steel ring of the seal. Use caution when drilling the hole so as not to damage the area around and behind the seal.
5. Screw in a self-tapping screw.
6. Use pliers to pull the front main oil seal to remove the front main oil seal.
7. Clean all the sealing surfaces.

1. Coat the lip of the front main oil seal with a small amount of GM P/N 1052497 chassis grease or equivalent to aid in installation.
2. Use the J 35268-A Camshaft/Front Main Seal Installer to tap the front main oil seal into place.
3. Ensure the front main oil seal is fully and evenly seated.



4. Install the crankshaft gear and collar.

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

5. Install the crankshaft gear bolt.

Tighten
Tighten the crankshaft gear bolt, while counterholding with J 42065 , to 250 N·m (184 lb ft) + 45 degrees + 15 degrees.

6. Install the timing belt. Refer to Timing Belt Replacement .