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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 257 (Engine Mechanical - 4.0L (On-Vehicle)) >> Repair Instructions >> Cylinder Head Replacement - Right >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2002 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the following subassemblies:
  2. Disconnect the electrical connector (2) from the ECT sensor.
  3. Remove the nut (3) securing the coil cassette ground wire to the cylinder head.
  4. Remove the bolt securing the exhaust crossover pipe to the cylinder head.
  5. Fig 1: Removing Electrical Connectors & Nuts
    G01819527Courtesy of GENERAL MOTORS CORP.
  6. Raise and support the vehicle.
  7. Remove the bolt (1) securing the front transaxle brace (2) to the cylinder head.
  8. Loosen the bolts (3) attaching the transaxle brace (2) to the transaxle.
    Fig 2: Removing Transaxle Brace
    G01819528Courtesy of GENERAL MOTORS CORP.
  9. Remove the bolt (2) securing the rear transaxle brace (1) to the transaxle.
  10. Lower the vehicle.
  11. Remove the nuts (3) securing the rear transaxle brace (1) to the cylinder head.
  12. Remove the rear transaxle brace.
    Fig 3: Removing Rear Transaxle Brace
    G01819529Courtesy of GENERAL MOTORS CORP.
  13. Remove the three M6 external drive bolts from the front portion of the cylinder head.

    Important:  DO NOT reuse the M11 cylinder head bolts.

  14. Remove and discard the ten M11 internal drive cylinder head bolts.
    Fig 4: Removing Internal Drive Cylinder Head Bolts
    G01819530Courtesy of GENERAL MOTORS CORP.
  15. Remove the right cylinder head. Make sure that no dowel guide pins are stuck in the cylinder head.

    Important:  You must clean the thread sealant material from the cylinder head bolt holes in the cylinder block. Failure to do so could cause false torque readings during reassembly.

  16. After removing the cylinder head, remove any remaining bolt thread sealant material from the threaded cylinder block holes.
    Fig 5: Removing Cylinder Head
    G01819531Courtesy of GENERAL MOTORS CORP.

    Important:  DO NOT reuse the cylinder head gasket.

  17. Remove the right cylinder head gasket.
  18. Fig 6: Removing Right Cylinder Head Gasket
    G01819532Courtesy of GENERAL MOTORS CORP.
  19. Remove all remaining gasket material from the cylinder head and cylinder block using the J 28410. 
  20. Place the cylinder head on a flat, clean surface with the combustion chambers face-up in order to prevent damage to the deck face.
  21. Clean and inspect the cylinder head. Refer to CYLINDER HEAD CLEANING AND INSPECTION .