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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1482 (Heating, Ventilation And Air Conditioning) >> Repair Instructions >> Coolant Bypass Valve Replacement >> Installation Procedure

Installation Procedure

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  1. Apply coolant to the end of the heater inlet hoses.
    IMPORTANT: When installing a new heater inlet hose, place the clamps on the hose before installing the hose to the inlet hose fitting at the engine block.
  2. Install the heater inlet hose to the inlet hose fitting at the engine block.
  3. Install the coolant bypass valve (6).
    NOTE: Refer to FASTENER NOTICE in Cautions and Notices.
  4. Install the nut retaining the coolant bypass valve to the cowl.

    Tighten 

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

  5. Install the vacuum hose to the coolant bypass valve.
  6. Install the inlet heater hose to the engine block.
    Fig 1: Installing Heater Inlet Hose To Engine Block
    G01596653Courtesy of GENERAL MOTORS CORP.
  7. Position the inlet heater hose clamp at the engine block using J38185.
  8. Connect the heater inlet hose to the heater core.
    IMPORTANT: Firmly push the quick connect onto the heater core pipe until you hear an audible click.
  9. Install the coolant recovery reservoir. Refer to COOLANT RECOVERY RESERVOIR REPLACEMENT in Engine Cooling.
  10. Fill the engine cooling system. Refer to DRAINING AND FILLING COOLING SYSTEM (BODY VIN CODE 6) or DRAINING AND FILLING COOLING SYSTEM (BODY VIN CODE 3) in Engine Cooling.
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