Tools Required

J 41479  Crankshaft Rear Oil Seal Installer. See Special Tools .

Fig 1: Identifying Oil Seal
Courtesy of GENERAL MOTORS CORP.
IMPORTANT: Note the installation direction of the oil seal. The new design oil seal is a reverse-lip type seal. For proper orientation, THIS SIDE OUT has been marked on the seal, as shown.
1. Lubricate the outside diameter (OD) and inside diameter (ID) of the oil seal with clean engine oil.
2. Inspect the seal and identify the THIS SIDE OUT markings for proper orientation.
Fig 2: View Of Crankshaft Rear Oil Seal
Courtesy of GENERAL MOTORS CORP.
3. Lubricate the rear housing oil seal bore with clean engine oil.
Fig 3: Installing Crankshaft Rear Oil Seal Using J 41479
Courtesy of GENERAL MOTORS CORP.
4. Install the J 41479  cone (2) and bolts onto the rear of the crankshaft. See Special Tools .
5. Tighten the bolts until snug. Do not overtighten.
6. Install the rear oil seal onto the tapered cone (2) and push the seal to the rear seal bore. Install the oil seal with the markings THIS SIDE OUT facing away from the engine.
7. Thread the J 41479  threaded rod into the tapered cone until the tool (1) contacts the oil seal. See Special Tools .
8. Align the oil seal onto the tool (1).
9. Rotate the handle of the tool (1) clockwise until the seal enters the rear housing and bottoms into the seal bore.
10. Remove the tool.