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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1021 (Engine Mechanical - 8.1L) >> Repair Instructions >> On-Vehicle Repair Instructions >> Cylinder Head Replacement - Right >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis 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 (without HP2) in Engine Cooling.
  2. Remove the intake manifold. Refer to Intake Manifold Replacement .
  3. Remove the valve rocker arms and pushrods. Refer to Valve Rocker Arm and Push Rod Replacement .
  4. Remove the engine coolant temperature (ECT) sensor clip from the bracket.
  5. Remove the ECT sensor from the cylinder head.
    6. Fig 1: View Of ECT Sensor Electrical Connector
    GM843867Courtesy of GENERAL MOTORS CORP.
  6. Remove the indicator tube bolt.
  7. Remove the indicator tube bracket.
    8. Fig 2: View Of Indicator Tube Bracket
    GM843863Courtesy of GENERAL MOTORS CORP.
  8. Remove the O-ring seal from the indicator tube.
    9. Fig 3: View Of Heater Hose Bracket & Bolts
    GM750695Courtesy of GENERAL MOTORS CORP.
  9. Remove the heater inlet and outlet hoses from the hose bracket.
  10. Remove the heater hose bracket bolts and bracket from the cylinder head.
  11. Remove the water crossover. Refer to Coolant Crossover Pipe Replacement (8.1L) in Engine Cooling.
  12. Remove the exhaust manifold. Refer to Exhaust Manifold Replacement - Right (8.1L Engine) in Engine Exhaust.
  13. Remove and discard the cylinder head bolts (1, 2, and 3).
    14. Fig 4: View Of Right Cylinder Head Bolts
    GM470989Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Place the cylinder head on two wood block to prevent damage to the sealing surface.
  14. Remove the cylinder head.
    15. Fig 5: View Of Right Cylinder Head And Alignment Pin
    GM470991Courtesy of GENERAL MOTORS CORP.
  15. Remove and discard the cylinder head gasket.
    16. Fig 6: View Of Right Cylinder Head Gasket And Alignment Pins
    GM470992Courtesy of GENERAL MOTORS CORP.
  16. Clean and inspect the cylinder head. Refer to Cylinder Head Cleaning and Inspection .
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