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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1819 (Engine Mechanical - 3.5L (L66)) >> Repair Instructions >> On Vehicle Repair Instructions >> Valve Rocker Arm and Shaft Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2007 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
    IMPORTANT: Identify parts as they are removed so they can be installed in their original locations if used again. When removing or installing the rocker arm shaft assembly, do not remove the rocker arm shaft mounting bolts. The bolts will retain the springs and rocker arms onto the shaft.
  1. Remove the valve rocker arm cover. Refer to Valve Rocker Arm Cover Replacement - Left Side  and Valve Rocker Arm Cover Replacement - Right Side .
    2. Fig 1: View Of Valve Rocker Arm Cover
    GM897124Courtesy of GENERAL MOTORS CORP.
  2. Loosen the adjusting nuts (217) and bolts (216).
    3. Fig 2: Identifying Rocker Shaft Retaining Bolts
    GM897125Courtesy of GENERAL MOTORS CORP.
  3. Loosen the left side rocker shaft retaining bolts in sequence. Loosen the valve rocker shaft mounting bolts 2 turns at a time in sequence, to prevent damaging the valves or rocker arms.
    4. Fig 3: Rocker Shaft Right Side Retaining Bolt Loosening/Tightening Sequence
    GM1308051Courtesy of GENERAL MOTORS CORP.
  4. Loosen the right side rocker shaft retaining bolts in sequence. Loosen the valve rocker shaft mounting bolts 2 turns at a time in sequence, to prevent damaging the valves or rocker arms.
    5. Fig 4: View Of Bolts, Valve Rocker Arm & Shaft Assemblies
    GM1336941Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Identify parts as they are removed so they can be installed in their original locations if used again. When removing or installing the rocker arm shaft assembly, do not remove the rocker arm shaft mounting bolts. The bolts will retain the springs and rocker arms on the shaft.
  5. Remove the bolts (1) and valve rocker arm and shaft assemblies.
  6. Remove the lash adjusters (2).
    7. Fig 5: Exploded View Of Intake Valve Rocker Arms
    GM1336942Courtesy of GENERAL MOTORS CORP.
  7. Remove the intake valve rocker arms as an assembly (4) from the shaft (1). Refer to Separating Parts .
  8. Remove the exhaust valve rocker arms (6) and springs (5) from the shaft (7).
  9. Remove the nuts (3) and bolts (2).
    10. Fig 6: View Of Exhaust Valve Rocker Arms
    GM1336943Courtesy of GENERAL MOTORS CORP.
  10. Note the installed location of the exhaust valve rocker arms (2).
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