GM Service Manual Online
For 1990-2009 cars only

Tools Required

J 33049 Universal Camshaft Bearing Remover and Installer Set


    Object Number: 4985  Size: SH
  1. Remove the camshaft bearings using the following procedure:
  2. 1.1. Remove the rear camshaft plug.

            Important: The rear camshaft bearing must be removed from the front of the block and the front camshaft bearing must be removed from the rear of the block. This allows the tool to remain centered.

    1.2. Insert the driving bar of the J 33049 with the correct expanding driver into the camshaft bearing (collet 4 for camshaft bearings one through four, and collet 3 for camshaft bearing five).
    1.3. Turn the J 33049 until the collet has tightened in the bearing.
    1.4. Push the guide cone against the block and into the first bearing bore in order to center the tool.
    1.5. Drive the bearing from the block.
    1.6. Repeat this procedure in order to remove the remaining camshaft bearings.

    Object Number: 65012  Size: SH
  3. Remove the block drain plugs.
  4. Remove the cup plugs and the block heater.
  5. Remove the engine oil pressure sensor switch.

  6. Object Number: 65013  Size: SH
  7. Remove the side oil gallery plugs.

  8. Object Number: 65014  Size: SH
  9. Remove the rear oil gallery plugs. An oil gallery plug is located inside the rear main bearing cap land.

  10. Object Number: 66576  Size: SH
  11. Pry out the oil filter bypass valve using a screwdriver.
  12. Remove the oil cooler bypass valve using the following procedure:
  13. 8.1. Install a sheet metal screw into the hole in the cup plug.
    8.2. Using side cutters or pliers, pry out the cup plug.
    8.3. Pry out the oil cooler bypass valve using a screwdriver.

    Important: 

       • The piston oil nozzles are made of aluminum and are pressed fit into the block. Certain cleaning solutions can damage the nozzles.
       • Do not damage the nozzle bore.
       • Do not damage the cylinder bore or deck surface.


    Object Number: 65017  Size: SH
  14. Remove the piston oil nozzles.

  15. Object Number: 65025  Size: SH
  16. Using a brass drift, drive the piston oil nozzles out of the block.