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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1115 (Engine Cooling System) >> Repair Instructions >> Thermostat Bypass Pipes Replacement >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2004 Pontiac Aztek and 2004 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.
  1. Apply engine coolant to the bypass pipe seal in order to ease installation.
  2. Install the thermostat bypass pipe.
    3. Fig 1: Removing/Installing Thermostat Bypass Pipe Hose
    GM187083Courtesy of GENERAL MOTORS CORP.
  3. Install the thermostat bypass pipe hose.
    4. Fig 2: Identifying Thermostat Bypass Pipes
    GM315719Courtesy of GENERAL MOTORS CORP.
  4. Install the thermostat bypass pipe hose clamp (5).
    5. NOTE: Refer to Fastener Notice in Cautions and Notices.
  5. Install the thermostat bypass pipe bolt (4).

    Tighten:  Tighten the thermostat bypass pipe bolt to 11 N.m (98 lb in).

  6. Install the thermostat bypass pipe to cylinder head nut (3).

    Tighten:  Tighten the thermostat bypass pipe nut to 25 N.m (18 lb ft).

  7. Install the thermostat bypass pipe to throttle body hose clamps (1).
    8. Fig 3: Locating Heater Pipe Nut
    GM54419Courtesy of GENERAL MOTORS CORP.
  8. Install the thermostat bypass pipe to throttle body nut.

    Tighten:  Tighten the thermostat bypass pipe nut to 25 N.m (18 lb ft).

  9. Install the heater hose to the bypass pipe.
  10. Install the left engine mount strut to the engine.
  11. Install the upper radiator hose to the engine.
  12. Install the air inlet duct. Refer to Air Cleaner Intake Duct Replacement in Engine Controls - 3.4L.
  13. Install the spark plug wire harness to the thermostat bypass pipe.
  14. Fill the cooling system. Refer to Draining and Filling Cooling System .
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