GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Oldsmobile 🢒 2004 🢒 Silhouette Ext. 🢒 Engine 🢒 Engine Mechanical - 3.4L 🢒 Valve Rocker Arm Cover Replacement - Right Side

Removal Procedure
  1. Remove the drive belt. Refer to Drive Belt Replacement .
  2. Remove the generator. Refer to Generator Bracket Replacement in Engine Electrical.
  3. Remove the generator bracket. Refer to Generator Bracket Replacement in Engine Electrical.
  4. Disconnect the engine right side spark plug wires. Refer to Spark Plug Wire Replacement in Engine Controls - 3.4 L.

    5. Object Number: 261279 Size: SH
  5. Disconnect the vacuum hoses from the evaporative emissions (EVAP) canister purge solenoid valve.
  6. Remove the EVAP canister purge solenoid valve. Refer to Evaporative Emission Canister Purge Solenoid Valve Replacement in Engine Controls - 3.4L.

    7. Object Number: 261282 Size: SH
  7. Remove the ignition module bracket with the coils.
  8. Remove the vacuum hose from the grommet in the engine right side valve rocker arm cover.

    9. Object Number: 60846 Size: SH

    Notice: Valve rocker arm cover gasket and sealant must be carefully trimmed away from lower intake manifold gasket. Failure to do so will damage the lower intake manifold gasket, causing a severe oil leak.

    Important: 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 bolts.
  10. Remove the valve rocker arm cover. Bump the end of the valve rocker cover with the palm of your hand or a soft rubber mallet if the cover adheres to the cylinder head.

    11. Object Number: 190588 Size: SH
  11. Trim the valve cover and sealant away from the lower intake manifold gasket at the cylinder head to the lower intake manifold joints (1).
  12. Remove the valve cover gasket.
  13. Clean the sealing surface on the cylinder head with degreaser.
  14. Clean the valve rocker arm cover. Refer to Valve Rocker Arm Cover Cleaning and Inspection .

Installation Procedure

    Object Number: 190588 Size: SH

    Important: Apply sealant GM P/N 12378521 (Canadian P/N 88901148) or equivalent, at the cylinder head to the lower intake manifold joint.

  1. Apply sealant at the cylinder head to the lower intake manifold joints (1).

    2. Object Number: 54369 Size: SH
  2. Install a NEW gasket to the valve rocker arm cover. Ensure that the gasket is properly seated in the groove of the valve rocker arm cover.
  3. Install the valve rocker arm cover.

    4. Notice: Refer to Fastener Notice in the Preface section.

  4. Install the valve rocker arm cover bolts.

    5. Tighten
    Tighten the bolts to 10 N·m (89 lb in).

  5. Install the vacuum hose to the grommet in the engine right side valve rocker arm cover.

    6. Object Number: 261282 Size: SH
  6. Install the ignition coil bracket with coils.
  7. Install the EVAP canister purge solenoid valve. Refer to Evaporative Emission Canister Purge Solenoid Valve Replacement in Engine Controls - 3.4L.

    8. Object Number: 261279 Size: SH
  8. Connect the vacuum hoses from the EVAP canister purge solenoid valve.
  9. Connect the engine right side spark plug wires. Refer to Spark Plug Wire Replacement in Engine Controls - 3.4L.
  10. Install the generator bracket. Refer to Generator Bracket Replacement in Engine Electrical.
  11. Install the generator. Refer to Generator Replacement in Engine Electrical.
  12. Install the drive belt. Refer to Drive Belt Replacement .