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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 - Left >> 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. Partially drain the cooling system. Refer to Draining and Filling Cooling System (Static Fill) or Draining and Filling Cooling System (Vac-N-Fill) .
  2. Remove the intake manifold cover. Refer to Intake Manifold Cover Replacement .
    3. Fig 1: View Of Left Spark Plug/Coil Harness
    GM1582091Courtesy of GENERAL MOTORS CORP.
  3. Disconnect the left spark plug wires from the spark plugs.
  4. Remove the spark plug wire harness clip from the heater inlet and outlet front pipe bracket.
  5. Remove the heater inlet and outer front pipe. Refer to Heater Hose/Pipe Replacement - Inlet/Outlet .
    6. Fig 2: Identifying Positive Crankcase Ventilation (PCV) Foul Air Tube
    GM1582012Courtesy of GENERAL MOTORS CORP.
  6. Disconnect the positive crankcase ventilation (PCV) foul air tube from the PCV valve. Refer to PLASTIC COLLAR QUICK CONNECT FITTING SERVICE .
    7. Fig 3: Identifying Left Valve Rocker Arm Cover
    GM1556824Courtesy of GENERAL MOTORS CORP.
  7. Remove the valve rocker arm cover bolts.
    8. IMPORTANT: When removing the valve rocker arm cover, ensure the gasket stays in place attached to the cylinder head.
  8. 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.
  9. Cut the RTV in the channel where the intake, cylinder head and valve rocker arm cover meet with a suitable tool.
  10. Remove the valve cover gasket.
  11. Clean the sealing surface on the cylinder head with degreaser.
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