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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 432 (Engine Mechanical - 2.2L (On-Vehicle)) >> Repair Instructions >> Valve Rocker Arm Cover Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2002 GMC Sonoma and 2002 Chevrolet S10 Pickup. However, it is still accessible from the selected car via links, so may be relevant.
  1. Drain the cooling system. Refer to DRAINING AND FILLING COOLING SYSTEM .
  2. Disconnect the power brake booster vacuum hose.
  3. Remove the air cleaner outlet resonator.
  4. Remove the throttle body. Refer to THROTTLE BODY .
    Fig 1: Power Brake Booster Vacuum Hose
    G01658826Courtesy of GENERAL MOTORS CORP.
  5. Remove the spark plug wire harness retainer from the thermostat assembly.
  6. Remove the spark plug wires from the spark plugs.

    Important:  Do not bend the thermostat assembly pipe out of the way in order to remove the valve rocker arm cover.

  7. Remove the water outlet housing. Refer to THERMOSTAT REPLACEMENT (2.2 L) or THERMOSTAT REPLACEMENT (4.3 L) .
    Fig 2: Spark Plug Wire Harness Retainer
    G01658827Courtesy of GENERAL MOTORS CORP.
  8. Disconnect the fuel injector harness electrical connector.
  9. Remove the fuel injector harness electrical connector from the bracket on the valve rocker arm cover.
  10. Remove the engine wiring harness from the bracket.
  11. Move and secure the engine wiring harness out of the way.
    Fig 3: Fuel Injector Harness Electrical Connector
    G01658828Courtesy of GENERAL MOTORS CORP.
  12. Remove the engine wiring harness bracket at the rear of the engine using the following procedure:
    1. 12.1. Loosen the bolt at the rear of the cylinder head.
    2. 12.2. Remove the 2 bolts that secure the bracket to the valve rocker arm cover.
    3. 12.3. Slide the bracket off of the bolt at the rear of the cylinder head.
    Fig 4: Engine Wiring Harness Bracket & Bolts
    G01658829Courtesy of GENERAL MOTORS CORP.
  13. Remove the air cleaner outlet resonator bracket.
    Fig 5: Air Cleaner Outlet Resonator Bracket
    G01658830Courtesy of GENERAL MOTORS CORP.

    Important:  The valve rocker arm cover gasket is reusable. Only replace the valve rocker arm cover gasket if it is damaged.

  14. Remove the rocker arm cover bolts, stud (1) and bracket (2).
  15. Remove the rocker arm cover.
  16. Remove the rocker arm cover gasket.
  17. Clean all sealing surfaces and the valve rocker arm cover. Refer to VALVE ROCKER ARM COVER CLEANING AND INSPECTION .
    Fig 6: Rocker Arm Cover, Bolts, Stud & Bracket
    G01658831Courtesy of GENERAL MOTORS CORP.
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