GM Service Manual Online
For 1990-2009 cars only

Tools Required

    • J 35268-A Camshaft Front Main Seal Installer
    • J 42065 Crank Hub Holding Tool
    • J 42098 Crank Hub TORX Socket

    Object Number: 894304  Size: SH
  1. Install the oil pump gasket.

  2. Object Number: 894795  Size: SH
  3. Install the oil pump and align with the guide pins. Ensure that the mating surface is clean and free of oil or grease.
  4. Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 894300  Size: SH
  5. Apply Permatex Threadlocker Blue P/N 21485278, or equivalent, to oil the pump bolts and install the bolts.
  6. Tighten
    Tighten the oil pump bolts to 27 N·m (20 lb ft).


    Object Number: 894296  Size: SH
  7. Install the oil pump collar.
  8. Install the front main oil seal. Coat the lip of the front main oil seal with a small amount of clean engine oil in order to aid in installation.
  9. Use the J 35268-A to install the front main oil seal.
  10. Ensure that the front main oil seal is fully and evenly seated.

  11. Object Number: 894304  Size: SH

    Notice: The oil pump bolts must be re-tightened after the generator mounting bolt has been tightened to specifications to allow for uniform compression of the oil pump gasket.

  12. Temporarily mount the generator and install the generator mounting bolts.
  13. Tighten
    Tighten the generator mounting bolts to 40 N·m (30 lb ft).

  14. Tighten the oil pump bolts in sequence.
  15. Tighten
    Tighten the oil pump bolts to 27 N·m (20 lb ft).

  16. Remove the generator bolts and the generator.
  17. Lubricate the new oil pump pickup tube O-ring with motor oil.
  18. Install the oil pan baffle.
  19. Tighten
    Tighten to 8 N·m (71 lb in).

    Important: Ensure that the oil pump pickup tube O-Ring is installed prior to pickup tube installation.


    Object Number: 896094  Size: SH
  20. Install the oil pump pickup tube.
  21. Install the oil pump pickup tube bolts.
  22. Tighten
    Tighten the oil pickup tube bolts to 8 N·m (71 lb in).