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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> Engine Mechanical >> Cooling System (Mechanical) >> Engine Cooling System >> Repair Instructions >> Thermostat Replacement (4.3 L) >> Removal Procedure

Removal Procedure

  1. Partially drain the cooling system. Refer to Draining and Filling Cooling System .
  2. Remove the air cleaner outlet duct.
  3. Remove the throttle body bracket nuts and reposition the bracket.
    Fig 1: Throttle Body Bracket & Nuts (4.3L)
    G01661441Courtesy of GENERAL MOTORS CORP.
  4. Remove the water outlet housing mounting bolts.
    Fig 2: Water Outlet Housing Mounting Bolts (4.3L)
    G01661442Courtesy of GENERAL MOTORS CORP.
  5. Remove the water outlet housing from the lower intake manifold and set aside.
  6. Remove the gasket or O-ring.
    Fig 3: Water Outlet Housing (4.3L)
    G01661443Courtesy of GENERAL MOTORS CORP.
  7. Remove the thermostat.
  8. Clean all the sealing surfaces of the water outlet housing.
  9. Clean the sealing surface on the lower intake manifold.
    Fig 4: Thermostat (4.3L)
    G01661444Courtesy of GENERAL MOTORS CORP.
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