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Home >> Buick >> 2008 >> Allure CXL >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 3 (Engine Mechanical - 5.3L) >> Repair Instructions - On Vehicle >> Valve Rocker Arm and Push Rod Replacement >> Installation Procedure

Installation Procedure

WARNING: This page is about a different variant/trim than selected.
IMPORTANT:
  • When reusing the valve train components, always install the components to their original location and position.
  • Valve lash is net build, no valve adjustment is required.
    Fig 1: View Of Valve Rocker Arm Pivot Support
    GM260141Courtesy of GENERAL MOTORS CORP.
  1. Lubricate the valve rocker arm and pushrod with clean engine oil.
  2. Lubricate the flange of the valve rocker arm bolt with clean engine oil.
  3. Install the valve rocker arm pivot support.
    4. Fig 2: View Of Pushrods
    GM260142Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Make sure that the pushrod seats properly to the valve lifter socket.
  4. Install the pushrod.
    5. Fig 3: View Of Rocker Arms & Bolts
    GM260140Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Ensure that the pushrod seat properly to the ends of the rocker arm. DO NOT tighten the rocker arm bolt at this time.
  5. Install the rocker arm and bolt.
  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.

    7. NOTE: Refer to Fastener Notice .
  7. With the engine in the number one firing position, tighten the following valve rocker arm bolts:

    Tighten: 

    • Tighten cylinders 1, 2, 7, and 8 exhaust valve rocker arm bolts to 30 N.m (22 lb ft).
    • Tighten cylinders 1, 3, 4, and 5 intake valve rocker arm bolts to 30 N.m (22 lb ft).

  8. Rotate the crankshaft 360 degrees.
  9. Tighten the following valve rocker arm bolts:

    Tighten: 

    • Tighten cylinders 3, 4, 5, and 6 exhaust valve rocker arm bolts to 30 N.m (22 lb ft).
    • Tighten 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 Side  and/or Valve Rocker Arm Cover Replacement - Right Side .
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