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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1776 (Engine Cooling System) >> Repair Instructions >> Thermostat Replacement (4.2L Engine) >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2002 Oldsmobile Bravada, 2002 GMC Envoy XL, 2002 GMC Envoy, and 2002 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
  1. Install the thermostat housing to the engine block.
    Fig 1: View Of Thermostat Housing & Bolts
    GM637656Courtesy of GENERAL MOTORS CORP.
    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).

  3. Lubricate the inner diameter of the radiator hose with engine coolant.
  4. Install the outlet hose to the thermostat housing (1). Secure the hose with the clamp.
    Fig 2: Removing/Installing Radiator Hose To Thermostat
    GM753670Courtesy of GENERAL MOTORS CORP.
  5. Install the generator. Refer to GENERATOR .
  6. Fill the cooling system with specified coolant and concentration. Refer to Draining and Filling Cooling System .
  7. Inspect all sealing surfaces for leaks after starting the engine.
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