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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1291 (Engine Cooling System) >> Repair Instructions >> Thermostat Replacement >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2003 Pontiac Vibe. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT: Position the air bleed valve facing upward.
  1. Install the thermostat.
  2. Install a new thermostat O-ring.
    Fig 1: Installing New Thermostat O-Ring
    G01547058Courtesy of GENERAL MOTORS CORP.
  3. Install the thermostat housing to the cylinder block.
    NOTE: Refer to FASTENER NOTICE in Cautions and Notices.
  4. Use the 2 nuts (1) in order to secure the thermostat cap.

    Tighten 

    • On low output engine, tighten the thermostat cap nuts to 11 N.m (8 lb ft).
    • On high output engine, tighten the thermostat cap nuts to 10 N.m (7 lb ft).
  5. Fill the radiator using approved coolant. Refer to DRAINING AND FILLING COOLING SYSTEM   .
  6. Start the engine.
  7. Run the engine until the coolant is at operating temperature. The coolant is at operating temperature when the following conditions exist:
    • The hoses feel warm.
    • The coolant is flowing through the radiator.
  8. Inspect for leaks in the cooling system.
  9. Turn off the engine.
  10. Install the radiator cap.
    Fig 2: Installing Thermostat Housing To Cylinder Block
    G01547059Courtesy of GENERAL MOTORS CORP.
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