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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1021 (Engine Mechanical - 8.1L) >> Repair Instructions >> On-Vehicle Repair Instructions >> Valve Rocker Arm Cover Replacement - Right >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the engine sight shield. Refer to Engine Sight Shield Replacement .
  2. Loosen the clamps at the throttle body and air cleaner.
  3. Remove the air cleaner outlet duct.
    4. Fig 1: View Of Air Cleaner Outlet Duct
    GM700979Courtesy of GENERAL MOTORS CORP.
  4. Remove the connector position assurance (CPA) retainer from the ignition coil electrical connector (2).
  5. Disconnect the ignition coil harness electrical connector (2).
  6. Disconnect the engine coolant temperature (ECT) sensor electrical connector (3).
    7. Fig 2: View Of Ignition Coil, ECT And MAP Sensor Electrical Connectors
    GM750529Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Twist the spark plug boot one-half turn in order to release the boot. Pull on the spark plug boot only. Do not pull on the spark plug wire or the wire could be damaged.
  7. Remove the spark plug wires from the ignition coils.
    8. Fig 3: View Of Spark Plug Wires (Right)
    GM470704Courtesy of GENERAL MOTORS CORP.
  8. Loosen the valve rocker arm cover bolts.
  9. Remove the valve rocker arm cover.
    IMPORTANT: The valve rocker arm cover gasket may be reused if not removed from the valve rocker arm cover.
    10. Fig 4: View Of Valve Rocker Arm Cover (Right)
    GM843851Courtesy of GENERAL MOTORS CORP.
  10. Replace the valve rocker arm cover gasket if it is cut or damaged.
  11. Clean and inspect the valve rocker arm cover. Refer to Valve Rocker Arm Cover Cleaning and Inspection .
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