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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1353 (Engine Mechanical - 4.3L) >> Repair Instructions >> On-Vehicle Repair Instructions >> Cylinder Head Replacement - Left >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2003 GMC Sierra and 2003 Chevrolet Silverado. 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. Remove the drive belt. Refer to Drive Belt Replacement .
  3. Remove the lower intake manifold. Refer to Intake Manifold Replacement - Lower .
  4. Remove the left exhaust manifold. Refer to EXHAUST MANIFOLD REPLACEMENT - LEFT (4.3L ENGINE) .
    Fig 1: Junction Block Bracket, Bolt & Wiring Harness
    G02105883Courtesy of GENERAL MOTORS CORP.
  5. Remove the left side pushrods. Refer to Valve Rocker Arm and Push Rod Replacement .
  6. Remove the junction block bracket bolt.
  7. Position the bracket and wiring harness aside.
  8. Loosen the power steering (P/S) pump rear bracket nut.
  9. Remove the P/S pump rear bracket front nut.
  10. Remove the bolts and nut for the P/S pump bracket.
  11. Leave the air conditioning (A/C) compressor, if equipped, and the P/S pump on the bracket.
  12. Slide the P/S pump bracket off of the stud and set aside.
    Fig 2: Power Steering Pump Bracket, Nuts & Bolt
    G02105884Courtesy of GENERAL MOTORS CORP.
  13. Remove the P/S pump bracket stud.
    Fig 3: Power Steering Pump Bracket Stud
    G02105885Courtesy of GENERAL MOTORS CORP.
  14. Remove the harness ground bolt.
  15. Position the harness ground (4) and ground strap (5).
    Fig 4: Harness Ground & Ground Strap
    G02105886Courtesy of GENERAL MOTORS CORP.
  16. Remove the engine coolant temperature (ECT) sensor.
    Fig 5: Engine Coolant Temperature (ECT) Sensor
    G02105887Courtesy of GENERAL MOTORS CORP.
  17. Remove the spark plugs.
    Fig 6: Spark Plug
    G02105888Courtesy of GENERAL MOTORS CORP.
  18. Remove the spark plug wire support bolts and support.
    Fig 7: Spark Plug Wire Support & Bolts
    G02105889Courtesy of GENERAL MOTORS CORP.
  19. Remove the cylinder head bolts.
    Fig 8: Cylinder Head Bolts
    G02105890Courtesy of GENERAL MOTORS CORP.
  20. Remove the cylinder head.
    Fig 9: Cylinder Head
    G02105891Courtesy of GENERAL MOTORS CORP.
  21. Remove and discard the cylinder head gasket.
    Fig 10: Cylinder Head Gasket
    G02105892Courtesy of GENERAL MOTORS CORP.
  22. Remove the cylinder head locator pins, if necessary.
  23. Clean and inspect the cylinder head, if necessary. Refer to Cylinder Head Cleaning and Inspection .
  24. Disassemble the cylinder head, if necessary. Refer to Cylinder Head Disassemble .
    Fig 11: Cylinder Head Locator Pins
    G02105893Courtesy of GENERAL MOTORS CORP.
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