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Home >> Buick >> 2007 >> Lucerne CX >> Repair and Diagnosis >> External Pages >> Different car >> Section 203 (Engine Mechanical - 3.5L) >> Repair Instructions >> On-Vehicle Repair Instructions >> Valve Rocker Arm Cover Replacement - Right >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2006 Pontiac Montana SV6, 2006 Chevrolet Uplander, and 2006 Buick Terraza. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: View Of Ignition Coil Bracket
    GM1238979Courtesy of GENERAL MOTORS CORP.
  1. Disconnect the negative battery cable. Refer to BATTERY NEGATIVE CABLE DISCONNECT/CONNECT PROCEDURE in Engine Electrical.
  2. Remove the drive belt. Refer to Drive Belt Replacement .
  3. Remove the generator. Refer to GENERATOR REPLACEMENT (LX9) in Engine Electrical.
  4. Remove the generator bracket. Refer to GENERATOR BRACKET REPLACEMENT (RPO LX9) in Engine Electrical.
  5. Remove the right spark plug wires. Refer to Spark Plug Wire Replacement in Engine Controls - 3.5L.
  6. Disconnect the vacuum hoses from the evaporative emission (EVAP) purge valve.
  7. Remove the EVAP purge valve.
  8. Remove the ignition coil bracket with the coils. Refer to Ignition Coil(s) Replacement in Engine Controls - 3.5L.
  9. Remove the ignition coil bracket studs.
  10. Remove the vacuum hose from the grommet in the right valve rocker arm cover.
    11. Fig 2: View Of Valve Rocker Cover & Bolts
    GM61834Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Valve rocker arm cover gasket and sealant must be carefully trimmed away from the lower intake manifold gasket. Failure to do so will damage the lower intake manifold gasket, causing a severe oil leak.
  11. Remove the right valve rocker arm cover bolts.
    12. IMPORTANT: When removing the valve rocker arm cover, ensure the gasket stays in place attached to the cylinder head.
  12. 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.

    13. Fig 3: Identifying Cylinder Head To Lower Intake Manifold Joint
    GM190588Courtesy of GENERAL MOTORS CORP.
  13. Trim the valve gasket and sealant away from the lower intake manifold gasket at the cylinder head to lower intake manifold joints (1).
  14. Remove the valve cover gasket.
  15. Clean the sealing surface on the cylinder head with degreaser.
  16. Clean the valve rocker arm cover. Refer to Valve Rocker Arm Cover Cleaning and Inspection .
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