GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1998 🢒 GMC C-Series Medium Duty Truck B7 🢒 Engine 🢒 Engine Controls - 6.5L (L65) 🢒 Valve Rocker Arm Cover Replacement

Removal Procedure

    Object Number: 332410 Size: SH
  1. Disconnect the battery negative cable from the batteries. Refer to Battery Cable Replacement in Engine Electrical.
  2. Remove the left or the right front wheel housing panel. Refer to Wheelhouse Panel Replacement in Body and Accessories.
  3. Remove the air cleaner assembly with the mounting brackets from the engine assembly. Refer to Air Cleaner Assembly Replacement in Engine Controls-6.5L-L65.
  4. The crankcase depression regulator (CDR) valve from the right valve cover.
  5. Remove the upper intake manifold from the lower intake manifold. Refer to Intake Manifold Replacement .
  6. Remove the lower intake manifold from the cylinder heads. Refer to Intake Manifold Replacement .

    7. Important: Do not attempt to bend the fuel injector lines in order to ease the removal of the valve rocker arm covers. Bending the fuel injector lines will cause damage to the fuel injector lines.

  7. Disconnect the fuel injection lines. Refer to Fuel Injection Line Replacement in Engine Controls-6.5L-L65.
  8. Remove the engine oil level indicator tube and the bracket. Refer to Oil Level Indicator and Tube Replacement .
  9. Remove the transmission oil level indicator tube and the bracket.
  10. Disconnect the electrical connectors at the valve rocker arm cover.
  11. Disconnect the wiring harness and secure the harness to the side.

    12. Object Number: 358437 Size: SH
  12. Remove the stud/nuts at the valve rocker arm cover.

    13. Object Number: 358435 Size: SH
  13. Remove the valve rocker arm cover.
  14. Remove all of the oil and the grease from the sealing surfaces.

Installation Procedure

    Object Number: 60277 Size: SH
  1. Apply a 5 mm (3/16 inch) bead of RTV sealant GM P/N 12345739 to the valve rocker arm cover, inboard of the bolt holes. The sealer must be wet to the touch when the bolts are tighten.

    2. Object Number: 358435 Size: SH
  2. Install the valve rocker arm cover to the cylinder heads.

    3. Object Number: 358437 Size: SH

    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.

  3. Install the stud/nuts to the valve rocker arm cover.

    4. Tighten
    Tighten the stud/nuts to 22 N·m (16 lb ft).

  4. Install the fuel injection lines. Refer to Fuel Injection Line Replacement in Engine Controls-6.5L-L65.
  5. Install the lower intake manifold to the cylinder heads. Refer to Intake Manifold Replacement .
  6. Install the upper intake manifold to the lower intake manifold. Refer to Intake Manifold Replacement .
  7. Install the electrical connectors at the left side of the valve rocker arm cover.
  8. Install the engine oil level indicator tube and the bracket. Refer to Oil Level Indicator and Tube Replacement .
  9. Install the transmission oil level indicator tube and the bracket.

    10. Object Number: 332410 Size: SH
  10. Install the CDR valve and the hose on the right side.
  11. Install air cleaner assembly with the mounting brackets to the engine. Refer to Air Cleaner Assembly Replacement in Engine Controls-6.5L-L65.
  12. Install the left or the right front wheel housing panel. Refer to Wheelhouse Panel Replacement in Body Front End.
  13. Connect the battery negative cables to the batteries. Refer to Battery Cable Replacement in Engine Electrical.