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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 907 (Engine Cooling System) >> Repair Instructions >> Thermostat Replacement (4.3L) >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2003 GMC Sonoma, 2003 GMC Jimmy, 2003 Chevrolet S10 Pickup, and 2003 Chevrolet Blazer. However, it is still accessible from the selected car via links, so may be relevant.

Important:  In order to prevent leakage, thoroughly clean all parts and sealing surfaces.

  1. Install the thermostat.
    Fig 1: Installing Thermostat
    G01978170Courtesy of GENERAL MOTORS CORP.
  2. Install a new gasket or O-ring.
  3. Install the water outlet housing to the lower intake manifold.
    Fig 2: Installing Water Outlet Housing To Lower Intake Manifold
    G01978171Courtesy of GENERAL MOTORS CORP.
    NOTE: Refer to FASTENER NOTICE in Cautions and Notices.
  4. Install the water outlet housing mounting bolts.

    Tighten 

    Tighten water outlet housing mounting bolts to 19 N.m (14 lb ft).

    Fig 3: Installing Water Outlet Housing Mounting Bolts
    G01978172Courtesy of GENERAL MOTORS CORP.
  5. Install the throttle body bracket to the throttle body.
  6. Install the throttle body bracket nuts.

    Tighten 

    Tighten the throttle body bracket nuts to 10 N.m (89 lb in).

  7. Fill the cooling system. Refer to DRAINING AND FILLING COOLING SYSTEM  .
  8. Inspect for coolant leaks.
    Fig 4: Installing Throttle Body Bracket To Throttle Body
    G01978173Courtesy of GENERAL MOTORS CORP.