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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 9 (Engine Mechanical - 6.6L - On Vehicle Repair Instructions) >> On-Vehicle Repair Instructions >> Valve Rocker Arm, Shaft, and Push Rod Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different variant/trim than selected.
  1. Remove the lower valve rocker arm covers. Refer to Valve Rocker Arm Cover Replacement - Lower Left  or Valve Rocker Arm Cover Replacement - Lower Right .
  2. Loosen the valve clearance lock nuts on each rocker arm.
  3. Loosen the valve clearance adjusting screw on each rocker arm in order to relieve tension on the valvetrain.
    Fig 1: View Of Valve Clearance Adjusting Screw
    GM660481Courtesy of GENERAL MOTORS CORP.
  4. Remove the rocker arm shaft assembly bolts in the sequence shown. Leave the bolts in the rocker arm shaft brackets.
    Fig 2: Rocker Arm Shaft Bolts Loosening Sequence
    GM660486Courtesy of GENERAL MOTORS CORP.
  5. Remove the rocker arm shaft assembly from the cylinder head.
    Fig 3: View Of Rocker Arm Shaft Assembly
    GM663833Courtesy of GENERAL MOTORS CORP.
  6. Remove the valve bridge pins.
  7. Remove the valve bridges.
  8. Remove the pushrods.
    Fig 4: View Of Pushrods, Valve Spring Caps & Valve Lifter Bridges
    GM660488Courtesy of GENERAL MOTORS CORP.
  9. Remove the rocker arm shaft bracket bolts (1), if necessary.
    Fig 5: View Of Rocker Arm Components
    GM667358Courtesy of GENERAL MOTORS CORP.
  10. Remove the bracket (12), rocker arm (11), and spring (10), if necessary.
  11. Remove the remaining rocker arms, springs, and brackets, if necessary.
  12. If required, clean and inspect the valve rocker arm and shaft. Refer to Valve Rocker Arm and Shaft Cleaning and Inspection .
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