GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 1582091  Size: SH
  1. Remove the intake manifold cover. Refer to Intake Manifold Cover Replacement .
  2. Remove the heater inlet and outer front pipe. Refer to Heater Inlet Hose/Pipe and Heater Outlet Hose/Pipe Replacement .

  3. Object Number: 1582012  Size: SH
  4. Disconnect the positive crankcase ventilation (PCV) foul air tube from the PCV valve. Refer to Plastic Collar Quick Connect Fitting Service .
  5. Remove the right engine mount strut. Refer to Engine Mount Strut Replacement - Right Side .

  6. Object Number: 1556824  Size: SH
  7. Remove the valve rocker arm cover bolts.
  8. Note: When removing the valve rocker arm cover, ensure the gasket stays in place attached to the cylinder head.

  9. Remove the valve rocker arm cover. If necessary, bump the end of the cover with the palm of your hand or a soft rubber mallet if the cover adheres to the cylinder head.
  10. Cut the RTV in the channel where the intake, cylinder head and valve rocker arm cover meet with a suitable tool.
  11. Remove the valve cover gasket.
  12. Clean the sealing surface on the cylinder head with degreaser.

Installation Procedure

Note: All gasket mating surfaces need to be free of oil and foreign material. Use cleaner to clean the surfaces. Refer to Adhesives, Fluids, Lubricants, and Sealers .


    Object Number: 190588  Size: SH
  1. Install a NEW valve rocker arm cover gasket into the groove in the valve rocker arm cover. Ensure that the gasket is properly seated in the groove of the valve rocker arm cover.
  2. Apply sealant at the cylinder head to the surfaces where the cylinder head and intake manifold meet (1). Refer to Adhesives, Fluids, Lubricants, and Sealers .

  3. Object Number: 1556824  Size: SH
  4. Install the valve rocker arm cover.
  5. Caution: Refer to Fastener Caution in the Preface section.

    Note: Use an alternating criss-cross pattern when tightening the valve rocker cover bolts. Failure to do so may result in oil leakage from the valve cover due to improper seating of the gasket.

  6. Install the valve rocker arm cover bolts and tighten to 10 N·m (89 lb in) .

  7. Object Number: 1582012  Size: SH
  8. Install the right engine mount strut. Refer to Engine Mount Strut Replacement - Right Side .
  9. Connect the PCV foul air tube to the PCV valve. Refer to Plastic Collar Quick Connect Fitting Service .

  10. Object Number: 1582091  Size: SH
  11. Install the heater inlet and outer front pipe. Refer to Heater Inlet Hose/Pipe and Heater Outlet Hose/Pipe Replacement .
  12. Install the intake manifold cover. Refer to Intake Manifold Cover Replacement .