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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 >> Cylinder Head Replacement - Left >> Removal Procedure

Removal Procedure

  1. Disconnect the negative battery cable. Refer to BATTERY NEGATIVE CABLE DISCONNECT/CONNECT PROCEDURE .
  2. Drain the cooling. Refer to DRAINING AND FILLING COOLING SYSTEM .
  3. Remove the engine cooling fan assembly. Refer to FAN CLUTCH REPLACEMENT .
  4. Remove the drive belt. Refer to Drive Belt Replacement .
  5. Loosen the nut holding the power steering pump rear bracket to the side of the engine.
  6. Remove the nut holding the power steering pump rear bracket to the front of the engine
  7. Remove the three bolts and the nut holding the power steering pump mounting bracket to the engine.
  8. With the power steering pump and the A/C compressor still attached, slide the power steering pump mount bracket off of the stud and set aside.
    Fig 1: Power Steering Pump Brackets, Power Steering Pump & A/C Compressor
    G01661134Courtesy of GENERAL MOTORS CORP.
  9. Remove the power steering pump mounting bracket stud from the cylinder head.
  10. Remove the lower intake manifold. Refer to Intake Manifold Replacement - Lower .
  11. Remove the exhaust manifold. Refer to EXHAUST MANIFOLD REPLACEMENT - LEFT .
    Fig 2: Power Steering Pump Mounting Bracket Stud
    G01661135Courtesy of GENERAL MOTORS CORP.
  12. Remove the spark plug wire harness and the spark plug wire support.
  13. Remove the valve pushrods. Refer to Valve Rocker Arm and Push Rod Replacement .
    Fig 3: Spark Plug Wire Harness & Wire Support
    G01661136Courtesy of GENERAL MOTORS CORP.
  14. Remove the ground wire bolt and the ground wire from the rear of the cylinder head.
  15. Secure the ground wire out of the way.
  16. Remove the bolt holding the fuel pipe bracket to the rear of the cylinder head.
    Fig 4: Ground Wire, Ground Wire Bolt & Fuel Pipe Bracket Bolt
    G01661137Courtesy of GENERAL MOTORS CORP.
  17. Remove the engine coolant temperature sensor (if applicable).
    Fig 5: Engine Coolant Temperature Sensor
    G01661138Courtesy of GENERAL MOTORS CORP.
  18. Remove the engine coolant temperature gage sensor (if applicable).
  19. Remove the spark plugs.
    Fig 6: Engine Coolant Temperature Gage Sensor
    G01661139Courtesy of GENERAL MOTORS CORP.
  20. Remove the cylinder head bolts.
    Fig 7: Left Cylinder Head Bolts
    G01661140Courtesy of GENERAL MOTORS CORP.
    NOTE: After removal, place the cylinder head on two wood blocks to prevent damage.
  21. Remove the cylinder head.
    Fig 8: Left Cylinder Head
    G01661141Courtesy of GENERAL MOTORS CORP.
  22. Remove and discard the cylinder head gasket.
    Fig 9: Left Cylinder Head Gasket
    G01661142Courtesy of GENERAL MOTORS CORP.
  23. Remove the dowel pins (cylinder head locator) (if required).
    24. Fig 10: Left Cylinder Head Dowel Pins
    G01661143Courtesy of GENERAL MOTORS CORP.
  24. Clean the engine block and the cylinder head sealing surfaces.
    NOTE: Clean all dirt, debris, and coolant from the engine block cylinder head bolt holes. Failure to remove all foreign material may result in damaged threads, improperly tightened fasteners or damage to components.
  25. Clean the cylinder head bolts and the engine block bolt holes.
  26. For further service to the cylinder head refer to the following:
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