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Home >> Chevrolet >> 2007 >> Chevy Express G2500, Van Cargo, 6.6 6 >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 20 (Engine Mechanical - 4.3L) >> Repair Instructions - On Vehicle >> Cylinder Head Replacement - Left Side >> Removal Procedure

Removal Procedure

WARNING: This page is about a different variant/trim than selected.
    Fig 1: Locating Power Steering Pump Mounting Bracket Stud
    GM475833Courtesy of GENERAL MOTORS CORP.
  1. Disconnect the battery negative cable. Refer to Battery Negative Cable Disconnection and Connection .
  2. Remove the engine cover. Refer to Engine Cover Replacement .
  3. Drain the engine coolant. Refer to Draining and Filling Cooling System (Static Fill) or Draining and Filling Cooling System (Vac N Fill) .
  4. Remove the fan shroud. Refer to Engine Coolant Fan Upper Shroud Replacement (4.3L, 4.8L, 5.3L, 6.0L) and Engine Coolant Fan Lower Shroud Replacement (4.3L, 4.8L, 5.3L, 6.0L)
  5. Remove the drive belt. Refer to Drive Belt Replacement .
  6. Remove the air conditioning compressor discharge hose, if equipped.
  7. Remove the air conditioning compressor suction hose, if equipped.
    8. Fig 2: Air Conditioning Compressor Mounting Bolts
    GM300811Courtesy of GENERAL MOTORS CORP.
  8. Remove the mounting bolts (2) for the air conditioning compressor (1), if equipped.
  9. Move the compressor aside and support.
  10. Remove the drive belt idler pulley if not equipped with A/C. Refer to Drive Belt Idler Pulley Replacement - without Air Conditioning .
  11. Remove the power steering pump pulley. Refer to Power Steering Pump Pulley Replacement .
    12. Fig 3: Power Steering Pump & Mounting Bolts
    GM288829Courtesy of GENERAL MOTORS CORP.
  12. Remove the 3 bolts holding the power steering pump to the power steering pump mounting bracket.

    The power steering pump can remain on the engine.

    13. Fig 4: Accessory Mounting Bracket
    GM188295Courtesy of GENERAL MOTORS CORP.
  13. Remove the 3 bolts and nut holding the power steering pump mounting bracket to the engine.
  14. Slide the power steering pump mounting bracket off the stud and power steering pump.
  15. Remove the power steering pump mounting bracket stud from the cylinder head.
  16. Remove the lower intake manifold. Refer to Lower Intake Manifold Replacement .
  17. Remove the exhaust manifold. Refer to Exhaust Manifold Replacement - Left Side (4.3L) .
    18. Fig 5: Rear Of Cylinder Head Ground Wires
    GM375408Courtesy of GENERAL MOTORS CORP.
  18. Remove the ground wires at the rear of the cylinder head.
  19. Remove the transmission control cable bracket.
  20. Remove the valve pushrods. Refer to Valve Rocker Arm and Push Rod Replacement .
    21. Fig 6: View Of Engine Coolant Temperature Sensor
    GM387769Courtesy of GENERAL MOTORS CORP.
  21. Remove the engine coolant temperature sensor if applicable.
    22. Fig 7: Engine Coolant Temperature Gage Sensor
    GM387767Courtesy of GENERAL MOTORS CORP.
  22. Remove the engine coolant temperature gage sensor if applicable.
    23. Fig 8: View Of Spark Plugs (Left)
    GM328582Courtesy of GENERAL MOTORS CORP.
  23. Remove the spark plugs.
    24. Fig 9: Locating Spark Plug Wire Support
    GM328588Courtesy of GENERAL MOTORS CORP.
  24. Remove the bolts and the spark plug wire support.
    25. Fig 10: Locating Cylinder Head Bolts (Left)
    GM480533Courtesy of GENERAL MOTORS CORP.
  25. Remove the cylinder head bolts.
    26. Fig 11: Removing/Installing Cylinder Head (Left)
    GM480536Courtesy of GENERAL MOTORS CORP.
  26. Remove the cylinder head.
    27. Fig 12: View Of Cylinder Head Gasket And Alignment Pins - Left
    GM334299Courtesy of GENERAL MOTORS CORP.
  27. Remove and discard the cylinder head gasket.
    28. Fig 13: View Of Cylinder Head Locator Pins
    GM330548Courtesy of GENERAL MOTORS CORP.
  28. Remove the dowel pins cylinder head locator if required.
  29. Clean the engine block and the cylinder head sealing surfaces.
    30. 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.
  30. Clean the cylinder head bolts and the engine block bolt holes.
  31. For further service to the cylinder head refer to the following: Cylinder Head Disassemble , Cylinder Head Cleaning and Inspection , Valve Guide Reaming/Valve and Seat Grinding  or Cylinder Head Assemble .
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