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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 >> Installation Procedure

Installation 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: Heater Core, Retaining Bolt & Heater Pipe
    GM621745Courtesy of GENERAL MOTORS CORP.
  1. Remove the cap or plug from the heater core.
  2. Using a lint-free clean, dry cloth, carefully clean the sealing surfaces of the heater pipe assembly and the heater core.
  3. Lightly coat the new seal washers with coolant.
  4. Carefully slide the new sealing washers onto the heater pipe assembly until seated.
  5. Install the heater pipe assembly into position in the vehicle.
  6. Install the heater pipe assembly to the heater core.
    7. NOTE: Refer to Fastener Notice in Cautions and Notices.
  7. Install the heater pipe assembly retaining bolt.

    Tighten:  Tighten the bolt to 16 N.m (12 lb ft).

  8. Install the RH air injection pipe.
  9. Install the RH air injection pipe to RH cylinder head bolts.

    Tighten:  Tighten the bolts to 20 N.m (15 lb ft).

    10. Fig 2: RH Air Injection Check Valve To RH/LH Cylinder Head & Bolts
    GM63229Courtesy of GENERAL MOTORS CORP.
  10. Install the RH air injection check valve to LH cylinder head bolt.

    Tighten:  Tighten the bolt to 20 N.m (15 lb ft).

  11. Connect the hose and hose clamp to the RH air injection check valve.
    12. Fig 3: Heater Pipe Bracket & Cowl
    GM621749Courtesy of GENERAL MOTORS CORP.
  12. Install the heater pipe bracket into position.
  13. Install the heater pipe bracket retaining nut.

    Tighten:  Tighten the nut to 10 N.m (89 lb in).

    14. Fig 4: RH Air Injection Check Valve & Hose Clamp
    GM296265Courtesy of GENERAL MOTORS CORP.
  14. Install the heater inlet and outlet hoses to the heater pipes.
  15. Using the J 38185  , install the heater hose clamps.

    Align the heater hose clamps as shown.

  16. Install the intake manifold. Refer to Intake Manifold Replacement in Engine Mechanical.
  17. Install the battery heat shield. Refer to Battery Heat Shield Replacement in Engine Electrical.
  18. Refill the cooling system. Refer to Draining and Filling Cooling System in Engine Cooling.
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