GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2002 🢒 GMC C Sierra - 2WD 🢒 Engine 🢒 Engine Controls - 6.6L 🢒 Valve Rocker Arm Cover Replacement - Lower Right Side

Removal Procedure

    Object Number: 660474 Size: SH
  1. Remove the upper right valve rocker arm cover. Refer to Valve Rocker Arm Cover Replacement - Upper Right Side .
  2. Disconnect injector wiring harness 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. Remove the encapsulated injector wire terminal nuts on each injector.
  5. Remove both injector harnesses.

    6. Object Number: 660476 Size: SH
  6. Remove the 12 bolts for the lower valve rocker arm cover.
  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. Remove the bolt grommets from the lower valve rocker arm cover.

    11. Object Number: 663626 Size: SH
  11. Clean the cylinder head cover. Remove any sludge or other deposits.
  12. Clean the lower valve rocker arm cover sealing surfaces.
  13. Inspect the lower valve rocker arm cover for cracks or any damage.
  14. Inspect the lower valve rocker arm cover sealing surfaces for damage.
  15. Replace the lower valve rocker arm cover if any damage is found.

Installation Procedure

    Object Number: 660476 Size: SH
  1. Install the gasket in the lower valve rocker arm cover.
  2. Install the bolt grommets in the lower valve rocker arm cover.
  3. Install the lower valve rocker arm cover.

    4. Object Number: 663902 Size: SH
  4. Install the 12 bolts for the lower valve rocker arm cover.

    5. The lower valve rocker arm cover is tightened 2 times in the numerical order.

    Bolts number 1 and 2 are used to position the cover.

    Tighten

    1. Tighten the lower valve rocker arm cover to 10 N·m (89 lb in) in the proper sequence.
    2. Retighten the lower valve rocker arm cover bolts to 10 N·m (89 lb in) in the proper sequence.

    Object Number: 660474 Size: SH
  5. Install the injector harnesses.
  6. Install the injector harness bracket bolts.

    7. Tighten
    Tighten the injector harness bolts to 9 N·m (80 lb in).

  7. Install the injector wire terminals and nuts to the injectors.

    8. Tighten
    Tighten the injector wire terminal nuts to 1.5 N·m (13 lb in).

  8. Connect injector wiring harnesses connectors.
  9. Install the right upper valve rocker arm cover. Refer to Valve Rocker Arm Cover Replacement - Upper Right Side .