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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Engine Mechanical - 4.3L (On-Vehicle) >> Repair Instructions >> Valve Rocker Arm Cover Replacement - Right >> Removal Procedure

Removal Procedure

  1. Remove the PCV tube from the air cleaner outlet duct and the valve rocker arm cover.
  2. Disconnect the spark plug wires from the spark plugs for the right side of the engine.
  3. Remove the EVAP canister purge solenoid valve. Refer to EVAP CANISTER PURGE SOLENOID .
    Fig 1: PCV Tube
    G01661092Courtesy of GENERAL MOTORS CORP.
  4. Unfasten the heater hose retainer above the valve rocker arm cover.
  5. Move and secure the heater hoses aside.
    Fig 2: Heater Hose Retainer
    G01661093Courtesy of GENERAL MOTORS CORP.
  6. Remove the bolt (3) holding the engine wiring harness bracket to the generator.
  7. Disconnect the crankcase position (CKP) sensor electrical connector (2).
  8. Move and secure the engine wiring harness aside.
    Fig 3: Engine Wiring Harness Bracket Bolt & CKP Sensor Electrical Connector
    G01661094Courtesy of GENERAL MOTORS CORP.
  9. Remove the valve rocker arm cover bolts.
  10. Remove the valve rocker arm cover bolt grommets.
  11. Discard the valve rocker arm cover bolt grommets.
    Fig 4: Right Valve Rocker Arm Cover Bolts
    G01661095Courtesy of GENERAL MOTORS CORP.
  12. Remove the valve rocker arm cover.
    Fig 5: Right Valve Rocker Arm Cover
    G01661096Courtesy of GENERAL MOTORS CORP.
  13. Remove the valve rocker arm cover gasket.
  14. Discard the valve rocker arm cover gasket.
    Fig 6: Right Valve Rocker Arm Cover Gasket
    G01661097Courtesy of GENERAL MOTORS CORP.
  15. Clean the valve rocker arm cover in cleaning solvent.
  16. Dry the valve rocker arm cover with compressed air.
  17. Inspect the valve rocker arm cover for the following:
    • Damage to the PCV valve grommet (1)
    • Damage to the bolt holes (2)
    • A damaged valve rocker arm cover may interfere with the valve rocker arms.
    • Damage to the exterior of the valve rocker arm cover (3)
    • Gouges or damage to the sealing surface (4)
    • Damage to the oil fill tube grommet (5)
    • Restrictions to the ventilation system passages
    Fig 7: Inspecting Right Valve Rocker Arm Cover
    G01661098Courtesy of GENERAL MOTORS CORP.
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