GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 1582009  Size: SH
  1. Remove the generator. Refer to Generator Replacement .
  2. Drain the cooling system, Refer to Cooling System Draining and Filling .
  3. Remove the coolant crossover pipe. Refer to Engine Coolant Crossover Pipe Replacement .
  4. Disconnect the positive crankcase ventilation (PCV) fresh air tube from the air cleaner outlet duct. Refer to Plastic Collar Quick Connect Fitting Service .
  5. Remove the PCV fresh air tube from the right side valve rocker arm cover.

  6. Object Number: 1675732  Size: SH
  7. Disconnect the engine harness electrical connector (1) from the manifold absolute pressure (MAP) sensor.
  8. Disconnect the engine harness electrical connector (2) from the ignition coil.
  9. Remove the heated oxygen sensor (HO2S) electrical connector clip from the ignition coil bracket.

  10. Object Number: 1587660  Size: SH
  11. Remove the spark plug wires from the ignition coil.
  12. Remove the ignition coil bracket bolts (1) and nuts (2).
  13. Remove the ignition coil with bracket (3) from the engine.

  14. Object Number: 1557668  Size: SH
  15. Remove the valve rocker arm cover bolts.
  16. Important: When removing the valve rocker arm cover, ensure the gasket stays in place attached to the cylinder head.

  17. Remove the valve rocker arm cover. 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.
  18. Cut the room temperature vulcanizing (RTV) sealer in the channel where the intake, cylinder head and valve rocker arm cover meet with a suitable tool.
  19. Remove the valve cover gasket.
  20. Clean the sealing surface on the cylinder head with degreaser.

Installation Procedure

Important: 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: 1557668  Size: SH
  4. Install the right valve rocker arm cover.
  5. Notice: Refer to Fastener Notice in the Preface section.

    Important: 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.
  7. Tighten
    Tighten the bolts to 10 N·m (89 lb in).


    Object Number: 1587660  Size: SH
  8. Install the ignition coil with bracket (3) to the engine.
  9. Install the ignition coil bracket bolts (1) and nuts (2).
  10. Tighten
    Tighten the bolts and nuts to 25 N·m (18 lb ft).

  11. Install the spark plug wires to the ignition coil.

  12. Object Number: 1675732  Size: SH
  13. Install the HO2S electrical connector clip to the ignition coil bracket.
  14. Connect the engine harness electrical connector (2) to the ignition coil.
  15. Connect the engine harness electrical connector (1) to the MAP sensor.

  16. Object Number: 1582009  Size: SH
  17. Install the coolant crossover pipe. Refer to Engine Coolant Crossover Pipe Replacement .
  18. Fill the coolant. Refer to Cooling System Draining and Filling .
  19. Install the PCV fresh air tube to the right side valve rocker arm cover.
  20. Connect the PCV fresh air tube to the air cleaner outlet duct. Refer to Plastic Collar Quick Connect Fitting Service .
  21. Install the generator. Refer to Generator Replacement .