GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2001 🢒 Regal (China) 🢒 Engine 🢒 Engine Mechanical - 2.5L (LB8) and 3.0L (LW9) 🢒 Valve Rocker Arm Cover Replacement - Left Side

Removal Procedure
  1. Drain the engine coolant. Refer to Draining and Filling Cooling System in Engine Cooling.
  2. Disconnect the left spark plug wires. Refer to Spark Plug Wire Harness Replacement in Engine Controls-2.5 L (LB8) and 3.0 L (LW9).
  3. Remove the right engine mount strut at the engine. Refer to Engine Mount Strut Replacement (Right) .
  4. Remove the thermostat bypass hose and 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
  6. Remove the left valve rocker arm cover bolts.
  7. Remove the left valve rocker arm cover.
  8. Remove the left valve rocker arm cover gasket.
  9. Clean the valve rocker arm cover. Refer to Valve Rocker Arm Cover Clean and Inspect .
  10. Clean the valve rocker arm cover gasket sealing surfaces on the cylinder head and the lower intake manifold.

Installation Procedure

    Object Number: 190588 Size: SH
  1. Install a new left valve rocker arm cover gasket into the valve rocker arm cover.

    2. Important: Apply sealant GM P/N 12345739 or equivalent at the cylinder head to lower intake manifold joint.

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

    3. Object Number: 190589 Size: SH

    Important: Apply sealant GM P/N 12345739 or equivalent at the cylinder head to lower intake manifold joint.

  3. Apply sealant 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: 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 valve rocker arm cover bolts.

    6. Tighten
    Tighten the valve rocker arm cover bolts to 10 N·m (89 lb in).

  6. Install the positive crankcase ventilation (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 at the engine. Refer toEngine Mount Strut Bracket Replacement - Right .
  9. Connect the left spark plug wires. Refer to Spark Plug Wire Harness Replacement in Engine Controls-2.5 L (LB8) and 3.0 L (LW9).
  10. Fill the engine cooling system. Refer to Draining and Filling Cooling System in Engine Cooling.