GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2003 🢒 Century 🢒 Engine 🢒 Engine Mechanical - 3.1L 🢒 Valve Rocker Arm Cover Replacement - Left Side

Removal Procedure
  1. 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 - 3.1L.
  3. Remove the thermostat bypass hose and the pipe. Refer to Thermostat Bypass Pipes Replacement in Engine Cooling.
  4. Remove the positive crankcase ventilation (PCV) valve from the left valve rocker arm cover.

    5. Object Number: 61833 Size: SH
  5. Remove the left valve rocker arm cover bolts.
  6. Remove the left valve rocker arm cover.
  7. Remove the left valve rocker arm cover gasket.
  8. Clean the valve rocker arm cover.
  9. Clean the valve rocker arm cover gasket mating surfaces.

Installation Procedure

    Object Number: 190588 Size: SH

    Important: Apply sealant GM P/N 12346286 (Canadian P/N 10953472) or equivalent at the cylinder head to lower intake manifold joint.

  1. Apply sealant at the cylinder head to lower intake manifold joint at the rear of the lower intake manifold (1).

    2. Object Number: 190589 Size: SH
  2. Apply sealant at the cylinder head to lower intake manifold joint at the front of the lower intake manifold (1).
  3. Install a new left valve rocker arm cover gasket.

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

    5. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  5. Install the left 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 pipe. Refer to Thermostat Bypass Pipes Replacement in Engine Cooling.
  8. Install the left spark plug wires. Refer to Spark Plug Wire Replacement in Engine Controls - 3.1L.
  9. Fill the cooling system. Refer to Cooling System Draining and Filling in Engine Cooling.
  10. Inspect for leaks.