GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2005 🢒 Allure 🢒 Engine 🢒 Engine Mechanical - 3.8L 🢒 Valve Rocker Arm Cover Replacement - Left Side

Removal Procedure
  1. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection.
  2. Remove the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement .

    3. Object Number: 97620 Size: SH
  3. Remove the right hand upper engine strut bolt from the engine bracket.
  4. Loosen (do not remove) the right hand upper engine strut bolt at the radiator core support and reposition the strut away from the engine.

    5. Object Number: 217748 Size: SH
  5. Remove the evaporative emission (EVAP) purge valve from the bracket on the engine.

    6. Object Number: 327736 Size: SH
  6. Remove the bolts from the aluminum section of the strut mount bracket.

    7. Object Number: 327637 Size: SH
  7. Loosen the bolts from the steel section of the strut mount bracket and remove the bracket.
  8. Disconnect the left spark plug wires from the spark plugs and coils. Refer to Spark Plug Wire Replacement.
  9. Remove the left spark plug wires and cover from the left valve rocker arm cover.

    10. Object Number: 406018 Size: SH
  10. Remove the left valve rocker arm cover bolts.

    11. Important: If the valve rocker arm cover adheres to the cylinder head, remove the valve rocker arm cover by bumping the end of the valve rocker arm cover with palm of hand or with a soft rubber mallet.

  11. Remove the left valve rocker arm cover.
  12. Remove the left valve rocker arm cover gasket.
  13. Clean the valve rocker arm cover mating surfaces.
  14. Clean the valve rocker arm cover bolts of all thread locking adhesive.

Installation Procedure

    Object Number: 406018 Size: SH

    Important: Ensure that valve the rocker arm cover gasket is seated properly in the valve rocker arm cover groove.

  1. Install the new valve rocker arm cover gasket.
  2. Install the left rocker arm cover.
  3. Apply thread lock compound GM P/N 12345493 (Canadian P/N 10953488) or equivalent, to the valve rocker arm cover bolt threads.

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

  4. Install the left valve rocker arm cover bolts.

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

  5. Install the left spark plug wires and cover to the left valve rocker arm cover.
  6. Connect the left spark plug wires to the spark plugs and coils. Refer to Spark Plug Wire Replacement.

    7. Object Number: 327637 Size: SH
  7. Position the strut mount bracket on the engine.

    8. Tighten
    Tighten the loose bolts in the steel section of the bracket to 50 N·m (37 lb ft).


    Object Number: 327736 Size: SH
  8. Install the bolts in the aluminum section of the strut mount bracket on the engine.

    9. Tighten
    Tighten the bolts in the aluminum section of the strut mount bracket on the engine to 50 N·m (37 lb ft).


    Object Number: 217748 Size: SH
  9. Install the EVAP purge valve to the bracket on the engine.

    10. Object Number: 97620 Size: SH
  10. Position the right hand upper engine strut to the bracket on the engine and install the bolt.

    11. Tighten

        • Tighten the right hand upper engine strut bolt to 30 N·m (22 lb ft).
        • Tighten the (already loose) right hand upper engine strut bolt at the radiator core support to 30 N·m (22 lb ft).
  11. Install the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement .
  12. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection.
  13. Inspect for oil leaks.