GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2003 🢒 GMC K Sierra - 4WD 🢒 Engine 🢒 Engine Controls - 6.6L 🢒 Valve Rocker Arm Cover Replacement - Lower Left Side

Removal Procedure

    Object Number: 660472 Size: SH
  1. Remove the upper left valve rocker arm cover. Refer to Valve Rocker Arm Cover Replacement - Upper Left Side .
  2. Disconnect the fuel injector electrical connectors.

    3. Important: Do not drop the injector harness bolts in the cylinder head oil return ports.

  3. Remove the injector harness bracket bolts for both injector harnesses.
  4. Loosen the encapsulated injector wire terminal nuts on each injector.
  5. Remove the injector harnesses.

    6. Object Number: 660473 Size: SH
  6. Remove the lower valve rocker arm cover bolts.
  7. Remove the lower valve rocker arm cover.
  8. Remove the gasket from the lower valve rocker arm cover.
  9. Inspect the lower valve rocker arm cover gasket for damage, replace if necessary. Otherwise reuse the old gasket.
  10. If required, clean and inspect the lower valve rocker arm cover. Refer to Valve Rocker Arm Cover Cleaning and Inspection - Lower .

Installation Procedure

    Object Number: 660473 Size: SH
  1. Install the lower valve rocker arm cover gasket.
  2. Install the lower valve rocker arm cover.

    3. Object Number: 663902 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 lower valve rocker arm cover bolts. Start with bolts 1 and 2, they are used to position the cover.

    4. Tighten the bolts in the sequence shown.

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


    Object Number: 660472 Size: SH
  4. Install the injector harnesses.
  5. Install the injector harness bracket bolts.

    6. Tighten
    Tighten the bolts to 9 N·m (80 lb in).

  6. Tighten the encapsulated injector wire terminal nuts on each injector.

    7. Tighten
    Tighten the nuts to 2 N·m (17 lb in).

  7. Connect the fuel injector electrical connectors.
  8. Install the upper left valve rocker arm cover. Refer to Valve Rocker Arm Cover Replacement - Upper Left Side .