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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 958 (Engine Mechanical - 6.6L (2 Of 5)) >> On-Vehicle Repair Instructions >> Valve Rocker Arm, Shaft, and Push Rod Replacement >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2007 GMC Sierra and 2007 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: View Of Rocker Arm Components
    GM667358Courtesy of GENERAL MOTORS CORP.
  1. Lubricate the rocker arm shaft (7) and the inside of the rocker arms with clean engine oil, if necessary.
  2. Install the rocker arm bracket (12) and bolt (1) on one end of the rocker arm shaft, if necessary.
  3. Install the intake rocker arm (9), spring (10), exhaust rocker arm (11), and bracket (12) with bolt (1). Continue in the same sequence to the last bracket, if necessary.
  4. Push the bracket (12) to compress the springs and then install the bolt (1), if necessary.
    5. Fig 2: View Of Pushrods, Valve Spring Caps & Valve Lifter Bridges
    GM660488Courtesy of GENERAL MOTORS CORP.
  5. Lubricate the top of the valves, the valve bridge stem, the valve lifter bridge, and the valve spring caps with clean engine oil.
  6. Install the valve bridge.
  7. Install the valve bridge pins.
  8. Lubricate the valve lifter end of the pushrod with clean engine oil.
  9. Install the pushrods.

    To ensure the pushrod is properly installed, gently pull up on the pushrod. Resistance should be felt from the pushrod trying to lift the valve lifter.

    10. Fig 3: View Of Rocker Arm Shaft
    GM663833Courtesy of GENERAL MOTORS CORP.
    NOTE: The pushrods must be correctly seated in the valve lifter and valve rocker arms before the rocker arm shaft assembly is torqued into place. Improper seating of the pushrods can cause damage to the pushrods or the valve rocker arm shaft assembly components.
  10. Install the rocker arm shaft assembly.
    11. Fig 4: Rocker Arm Shaft Bolts Tightening Sequence
    GM721463Courtesy of GENERAL MOTORS CORP.
    NOTE: Refer to Fastener Notice .
  11. Tighten the rocker arm shaft bolts in the sequence shown.

    Tighten:  Tighten the bolts to 41 N.m (30 lb ft).

  12. Adjust the valve clearance. Refer to Valve Lash Adjustment .
  13. Install the lower valve rocker arm covers. Refer to Valve Rocker Arm Cover Replacement - Lower Left Side  or Valve Rocker Arm Cover Replacement - Lower Right Side .
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