GM Service Manual Online
For 1990-2009 cars only

Tools Required

J 42041 Front Crankshaft Seal Installer

Removal Procedure

  1. Remove the crankshaft balancer. Refer to Crankshaft Balancer Replacement .

  2. Object Number: 287895  Size: SH
  3. Do not gouge the front cover when prying out the front cover seal. The seal will remove easily.
  4. Remove the front cover seal with a small pry bar or a flat-bladed tool.

Installation Procedure


    Object Number: 287912  Size: SH
  1. Place the front seal (1) onto the mandrel of the installation tool.

  2. Object Number: 287915  Size: SH
  3. Slide the mandrel onto the screw of the installation tool.
  4. Thread the J 42041 in the crankshaft. Ensure you engage at least ten threads of the J 42041 before pressing the seal in place.

  5. Object Number: 287897  Size: SH
  6. Push the seal into position by tightening the nut on the installation tool until the mandrel bottoms out on the crankshaft sprocket.

  7. Object Number: 287916  Size: SH

    Important: The seal should NOT be flush with the front cover.

  8. Check the installed depth of the seal (1). The seal should protrude 1-2 mm (0.039-0.078 in) from the front cover.
  9. Install the crankshaft balancer. Refer to Crankshaft Balancer Replacement .