Crankshaft Rear Oil Seal Installation

Tools Required 

J 41479  Crankshaft Rear Oil Seal Installer

Important: 

• Do not lubricate the oil seal inside diameter (ID) or the crankshaft surface.
• Do not use the crankshaft rear oil seal again.

1. Lubricate the outside diameter (OD) of the oil seal (1) with clean engine oil.

   DO NOT allow oil or other lubricants to contact the seal surface.

   Fig 1: Lubricating Oil Seal

   Courtesy of GENERAL MOTORS CORP.
2. Lubricate the rear cover oil seal bore with clean engine oil.

   DO NOT allow oil or other lubricants to contact the crankshaft surface.

3. Install the J 41479  cone (2) and bolts onto the rear of the crankshaft.
4. Tighten the bolts until snug. Do not overtighten.
5. Install the rear oil seal onto the tapered cone (2) and push the seal to the rear cover bore.
6. Thread the J 41479  threaded rod into the tapered cone until the tool (1) contacts the oil seal.
7. Align the oil seal onto the tool (1).
8. Rotate the handle of the tool (1) clockwise until the seal enters the rear cover and bottoms into the cover bore.
9. Remove the tool.
   Fig 2: Installing Rear Oil Seal

   Courtesy of GENERAL MOTORS CORP.