Crankshaft Front Oil Seal Installation (LS3, L99, or LSA)

Special Tools 

J 41478  Crankshaft Front Oil Seal Installer

Fig 1: View Of Crankshaft Front Oil Seal
Courtesy of GENERAL MOTORS COMPANY
NOTE:
• Do not lubricate the oil seal sealing surface.
• Do not use the crankshaft front oil seal again.
1. Lubricate the outer edge of the oil seal (1) with clean engine oil.
2. Lubricate the front cover oil seal bore with clean engine oil.
Fig 2: View Of Crankshaft Front Oil Seal Installation
Courtesy of GENERAL MOTORS COMPANY
3. Install the crankshaft front oil seal (1) onto the J 41478  seal installer.
4. Install the J 41478  seal installer threaded rod, with nut, washer, guide, and oil seal, into the end of the crankshaft.
5. Use the J 41478  seal installer in order to install the oil seal into the cover bore.
   1. Use a wrench and hold the hex on the installer bolt.
   2. Use a second wrench and rotate the installer nut clockwise until the seal bottoms in the cover bore.
   3. Remove the tool.
   4. Inspect the oil seal for proper installation. The oil seal should be installed evenly and completely into the front cover bore.