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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 148 (Engine Mechanical - 4.8L, 5.3L & 6.0L) >> Repair Instructions >> On-Vehicle Repair Instructions >> Valve Rocker Arm and Push Rod Replacement >> Installation Procedure

Installation Procedure

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Important:  When reusing the valve train components, always install the components to the original location and position.

Valve lash is net build, no valve adjustment is required.

  1. Lubricate the valve rocker arms and pushrods with clean engine oil.
  2. Lubricate the flange of the valve rocker arm bolts with clean engine oil.

    Lubricate the flange or washer surface of the bolt that will contact the valve rocker arm.

  3. Install the valve rocker arm pivot support.
    Fig 1: Installing Valve Rocker Arm Pivot Support
    G02078487Courtesy of GENERAL MOTORS CORP.

    Important:  Make sure that the pushrods seat properly to the valve lifter sockets.

  4. Install the pushrods.
    Fig 2: Installing Pushrods
    G02078488Courtesy of GENERAL MOTORS CORP.

    Important:  Make sure that the pushrods seat properly to the ends of the rocker arms. DO NOT tighten the rocker arm bolts at this time.

  5. Install the rocker arms and bolts.
    Fig 3: Installing Rocker Arms & Bolts
    G02078489Courtesy of GENERAL MOTORS CORP.
  6. Rotate the crankshaft until the number one piston is at top dead center (TDC) of the compression stroke.

    In this position, cylinder number one rocker arms will be off lobe lift, and the crankshaft sprocket key will be at the 1:30 position.

    The engine firing order is 1,8,7,2,6,5,4,3.

    Cylinders 1,3,5 and 7 are the left bank.

    Cylinder 2,4,6 and 8 are the right bank.

    CAUTION: 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.
  7. With the engine in the number one firing position, tighten the following valve rocker arm bolts:

    Tighten 

    • Tighten the cylinders 1,2,7 and 8 exhaust valve rocker arm bolts to 30 N.m (22 lb ft).
    • Tighten the cylinders 1,3,4 and 5 intake valve rocker arm bolts to 30 N.m (22 lb ft).
      Fig 4: Rotating Crankshaft To Position Number 1 Piston
      G02078490Courtesy of GENERAL MOTORS CORP.
  8. Rotate the crankshaft 360 degrees.
  9. Tighten the following valve rocker arm bolts:

    Tighten 

    • Tighten the cylinders 3, 4, 5 and 6 exhaust valve rocker arm bolts to 30 N.m (22 lb ft).
    • Tighten the cylinders 2, 6, 7 and 8 intake valve rocker arm bolts to 30 N.m (22 lb ft).
  10. Install the valve rocker arm cover. Refer to Valve Rocker Arm Cover Replacement - Left  or Valve Rocker Arm Cover Replacement - Right  .
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