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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1498 (Engine Cooling System) >> Repair Instructions >> Thermostat Replacement (4.2L Engine) >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2003 Oldsmobile Bravada, 2003 GMC Envoy XL, 2003 GMC Envoy, and 2003 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
  1. Install the thermostat housing at the water inlet to the engine block.
    NOTE: Refer to FASTENER NOTICE in Cautions and Notices.
  2. Install the thermostat housing bolts.

    Tighten 

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

    Fig 1: Installing Thermostat Housing To Engine Block (4.2L Engine)
    G02129803Courtesy of GENERAL MOTORS CORP.
  3. Lubricate the inner diameter of the radiator hose with engine coolant.
  4. Install the outlet hose to the thermostat (1). Secure the hose with the clamp.
  5. Install the generator. Refer to CHARGING SYSTEM  or CHARGING SYSTEM  in Engine Electrical
  6. Fill the cooling system with specified coolant and concentration. Refer to DRAINING AND FILLING COOLING SYSTEM (BODY VIN CODE 6)   or DRAINING AND FILLING COOLING SYSTEM (BODY VIN CODE 3)   .
  7. Inspect all sealing surfaces for leaks after starting the engine.
    Fig 2: Installing Outlet Hose To Thermostat (4.2L Engine)
    G02129804Courtesy of GENERAL MOTORS CORP.
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