GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 64275  Size: SH
  1. Remove the crankshaft balancer. Refer to Crankshaft Balancer Replacement .

  2. Object Number: 220622  Size: SH
  3. Remove the front crankshaft oil seal.

Installation Procedure

Tools Required

J 41478 Engine Front Cover Oil Seal Installer

Important: Do not lubricate the oil seal sealing surface.

Do not reuse the crankshaft front oil seal.


    Object Number: 63177  Size: SH
  1. Lubricate the outer edge of the oil seal with clean engine oil.
  2. Lubricate the front cover oil seal bore with clean engine oil.
  3. Install the crankshaft front oil seal onto the J 41478 guide.
  4. Install the J 41478 threaded rod (with nut, washer, guide, and oil seal) into the end of the crankshaft.
  5. Use the J 41478 to install the oil seal into the cover bore.
  6. 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 J 41478 .
    5.4. Inspect the oil seal for proper installation. The oil seal should be installed evenly and completely into the front cover bore.

    Object Number: 64275  Size: SH
  7. Install the crankshaft balancer. Refer to Crankshaft Balancer Replacement .