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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1546 (Heating, Ventilation And Air Conditioning) >> Repair Instructions >> Heater Pipes Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2004 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: RH Air Injection Check Valve & Hose Clamp
    GM296265Courtesy of GENERAL MOTORS CORP.
  1. Remove the battery heat shield. Refer to Battery Heat Shield Replacement in Engine Electrical.
  2. Drain the cooling system. Refer to Draining and Filling Cooling System in Engine Cooling.
  3. Remove the intake manifold. Refer to Intake Manifold Replacement in Engine Mechanical.
  4. Using the J 38185  , release and reposition the heater inlet and outlet hose clamps.
  5. Separate the heater hoses from heater pipes.
  6. Disconnect the hose clamp and hose from the RH air injection check valve.
    7. Fig 2: RH Air Injection Check Valve To RH/LH Cylinder Head & Bolts
    GM63229Courtesy of GENERAL MOTORS CORP.
  7. Remove the RH air injection check valve to LH cylinder head bolt.
  8. Remove the RH air injection check valve to RH cylinder head bolts.
  9. Remove the RH air injection pipe.
    10. Fig 3: Heater Core, Retaining Bolt & Heater Pipe
    GM621745Courtesy of GENERAL MOTORS CORP.
  10. Remove the nut retaining the heater pipe bracket to the cowl.
  11. Remove the heater pipe to heater core retaining bolt.
    12. IMPORTANT: Be sure to cap or plug the open heater core to prevent contamination.
  12. Disconnect the heater pipe assembly from the heater core, allow any remaining coolant to drain, discard the seal washers and cap or plug the heater core to prevent contamination.
  13. Remove the heater pipe assembly from the vehicle.
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