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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 >> Off-Vehicle Repair Instructions >> Valve Rocker Arm and Push Rod Installation

Valve Rocker Arm and Push Rod Installation

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Important:  When using the valve train components again, 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
    G02079044Courtesy of GENERAL MOTORS CORP.

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

  4. Install the pushrods.
    Fig 2: Installing Pushrods
    G02079045Courtesy of GENERAL MOTORS CORP.

    Important:  Ensure 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
    G02079046Courtesy of GENERAL MOTORS CORP.
  6. Rotate the crankshaft until number one piston is at top dead center of 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. If viewing from the rear of the engine, the additional crankshaft pilot hole, non-threaded, will be in the 10:30 position.

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

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

    Cylinders 2, 4, 6, and 8 are 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 exhaust valve rocker arm bolts 1, 2, 7, and 8 to 30 N.m (22 lb ft).
    • Tighten intake valve rocker arm bolts 1, 3, 4, and 5 to 30 N.m (22 lb ft).
  8. Rotate the crankshaft 360 degrees.
    Fig 4: Rotating Crankshaft
    G02079047Courtesy of GENERAL MOTORS CORP.
  9. Tighten the following valve rocker arm bolts:

    Tighten 

    • Tighten exhaust valve rocker arm bolts 3, 4, 5, and 6 to 30 N.m (22 lb ft).
    • Tighten intake valve rocker arm bolts 2, 6, 7, and 8 to 30 N.m (22 lb ft).
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