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Home >> GMC >> 2006 >> Sierra 1500 HD, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 37 (Engine Mechanical - 6.6L - Off Vehicle Repair Instructions (2 Of 3)) >> Off-Vehicle Repair Instructions (Part 2) >> Valve Rocker Arm Cover Cleaning and Inspection - Upper

Valve Rocker Arm Cover Cleaning and Inspection - Upper

WARNING: This page is about a different variant/trim than selected.
  1. Remove the PCV cover screws.
  2. Remove the PCV cover, diaphragm, and spring.
    Fig 1: View Of PCV Cover, Diaphragm & Spring
    GM1336134Courtesy of GENERAL MOTORS CORP.
  3. Clean the upper valve rocker arm cover. Remove any sludge or other deposits.
  4. Clean the upper valve rocker arm cover mating surface.
  5. Inspect the upper valve rocker arm cover for cracks or other damage.
    Fig 2: Inspecting Upper Valve Rocker Arm Cover
    GM1336135Courtesy of GENERAL MOTORS CORP.
  6. Inspect the upper valve rocker arm cover mating surfaces for damage.
  7. Replace the upper valve rocker arm cover if any damage is found.
  8. Inspect the PCV cover, diaphragm, and spring for damage.
  9. Install the PCV spring.
    Fig 3: View Of PCV Cover, Diaphragm & Spring
    GM1336134Courtesy of GENERAL MOTORS CORP.
  10. Install the PCV diaphragm.
  11. Install the PCV cover.
    12. NOTE: Refer to FASTENER NOTICE .
  12. Install the PCV cover screws.

    Tighten:  Tighten the PCV cover screws to 4 N.m (35 lb in).

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