GM Service Manual Online
For 1990-2009 cars only

Tools Required

J 42849 Crankshaft Rear Seal Installer

Important: Crankshaft rear oil seal and engine flywheel installation requires adequate space for installation. If the engine stand does not allow suitable space to use the J 42849 , install the crankshaft rear oil seal and engine flywheel with the engine properly supported on the floor.


    Object Number: 640011  Size: SH
  1. Make sure the crankshaft rear chamfer is free of grit, loose rust, and burrs. Correct as needed.
  2. Apply a very light film of oil onto the crankshaft sealing surface.
  3. DO NOT apply oil to the sealing surface of the engine block.

  4. Install the seal on the J 42849 .
  5. Position J 42849 against the crankshaft. Thread the attaching screws into the tapped holes in the crankshaft.
  6. Tighten the screws securely with a screwdriver in order to ensure that the seal is installed squarely over the crankshaft.
  7. Rotate the center nut until the J 42849 bottoms.
  8. Remove the J 42849 .