GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2005 🢒 Impala 🢒 Engine 🢒 Engine Mechanical - 3.4L 🢒 Valve Rocker Arm Cover Replacement - Left Side

Removal Procedure
  1. Partially drain the cooling system. Refer to Cooling System Draining and Filling in Engine Cooling.
  2. Remove the left spark plug wires. Refer to Spark Plug Wire Replacement in Engine Controls - 3.4L.
  3. Remove the right engine mount strut at the engine. Refer to Engine Mount Strut Replacement - Right Side .
  4. Remove the thermostat bypass hose and the pipe. Refer to Thermostat Bypass Pipes Replacement in Engine Cooling.
  5. Remove the positive crankcase ventilation (PCV) valve from the left valve rocker arm cover.

    6. Object Number: 61833 Size: SH

    Important: The valve rocker arm cover gasket sealant must be trimmed away from the lower intake manifold gasket. Failure to do so may damage the lower intake manifold gasket, causing a severe oil leak.

  6. Remove the valve rocker arm cover bolts.

    7. Important: When removing the valve rocker arm cover, ensure the gasket stays in place attached to the cylinder head.

  7. Remove the left 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.

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

Installation Procedure

    Object Number: 190588 Size: SH
  1. Install a new left valve rocker arm cover gasket to the valve rocker arm cover.
  2. Apply sealant GM P/N 12378577  (Canadian P/N 89022195) or equivalent at the cylinder head to lower intake manifold joint at the rear of the lower intake manifold (1).

    3. Object Number: 190589 Size: SH
  3. Apply sealant GM P/N 12378577  (Canadian P/N 89022195) or equivalent at the cylinder head to lower intake manifold joint at the front of the lower intake manifold (1).

    4. Object Number: 61833 Size: SH
  4. Install the left valve rocker arm cover.

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

  5. Install the valve rocker arm cover bolts.

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

  6. Install the PCV valve to the left valve rocker arm cover.
  7. Install the thermostat bypass hose and pipe. Refer to Thermostat Bypass Pipes Replacement in Engine Cooling.
  8. Install the right engine mount strut. Refer to Engine Mount Strut Replacement - Right Side .
  9. Install the left spark plug wires. Refer to Spark Plug Wire Replacement in Engine Controls - 3.4L.
  10. Fill the cooling system. Refer to Cooling System Draining and Filling in Engine Cooling.