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Home >> Buick >> 2007 >> Lucerne CX >> Repair and Diagnosis >> External Pages >> Different car >> Section 237 (Engine Mechanical - 3.9L) >> 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.
  1. Remove the generator. Refer to GENERATOR REPLACEMENT (LZ9) .
  2. Drain the cooling system, Refer to DRAINING AND FILLING COOLING SYSTEM (STATIC FILL) .
  3. Remove the coolant crossover pipe. Refer to COOLANT CROSSOVER PIPE REPLACEMENT - LZ9 (3.9L) .
    4. Fig 1: Identifying Positive Crankcase Ventilation (PCV) Fresh Air Tube
    GM1582009Courtesy of GENERAL MOTORS CORP.
  4. Disconnect the positive crankcase ventilation (PCV) fresh air tube from the air cleaner outlet duct. Refer to AIR CLEANER OUTLET DUCT REPLACEMENT .
  5. Remove the PCV fresh air tube from the right side valve rocker arm cover. Refer to PLASTIC COLLAR QUICK CONNECT FITTING SERVICE .
    6. Fig 2: Locating Engine Harness Electrical Connectors
    GM1675732Courtesy of GENERAL MOTORS CORP.
  6. Disconnect the engine harness electrical connector (1) from the manifold absolute pressure (MAP) sensor.
  7. Disconnect the engine harness electrical connector (2) from the ignition coil.
  8. Remove the heated oxygen sensor (HO2S) electrical connector clip from the ignition coil bracket.
    9. Fig 3: Identifying Ignition Coil Bracket Bolts & Nuts
    GM1587660Courtesy of GENERAL MOTORS CORP.
  9. Remove the spark plug wires from the ignition coil.
  10. Remove the ignition coil bracket bolts (1) and nuts (2).
  11. Remove the ignition coil with bracket (3) from the engine.
    12. Fig 4: View Of Right Valve Rocker Arm Cover
    GM1557668Courtesy of GENERAL MOTORS CORP.
  12. Remove the valve rocker arm cover bolts.
    13. IMPORTANT: When removing the valve rocker arm cover, ensure the gasket stays in place attached to the cylinder head.
  13. 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.
  14. 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.
  15. Remove the valve cover gasket.
  16. Clean the sealing surface on the cylinder head with degreaser.
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