GM Service Manual Online
For 1990-2009 cars only

Special Tools

    • EN-47812 Installer Bolt
    • J 41478 Crankshaft Front Oil Seal Installer
    • J 41478-1A Crankshaft Front Oil Seal Installer Cone
         For equivalent regional tools, refer to Special Tools

    Object Number: 1704631  Size: SH

    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.

  3. Object Number: 2174069  Size: SH
  4. Using the EN-47812 bolt and the J 41478 installer , install the crankshaft front oil seal.
  5. Install the EN-47812 bolt threaded rod (1), nut, washer, the J 41478-1A installer cone  (2), and oil seal (3) into the end of the crankshaft.
  6. Use the J 41478 installer in order to install the oil seal into the cover bore.
  7. 5.1. Use a wrench and hold the hex on the installer bolt.
    5.2. Use a second wrench and rotate the installer nut clockwise until the seal bottoms in the cover bore.
    5.3. Remove the tool.
    5.4. Inspect the oil seal for proper installation. The oil seal should be installed evenly and completely into the front cover bore.