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Home >> Chevrolet >> 2005 >> Aveo Base, 4D Hatchback >> Repair and Diagnosis >> External Pages >> Different car >> Section 37 (Engine Cooling System) >> Repair Instructions >> Thermostat Replacement (1.2L SOHC) >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2004 Suzuki Swift + and 2004 Chevrolet Aveo. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: View Of Radiator Hose
    GM1223081Courtesy of GENERAL MOTORS CORP.
    CAUTION: As long as there is pressure in the cooling system, the temperature can be considerably higher than the boiling temperature of the solution in the radiator without causing the solution to boil. Removal of the pressure cap while the engine is hot and pressure is high will cause the solution to boil instantaneously - possibly with explosive force - spewing the solution over the engine, fenders and the person removing the cap.
  1. Disconnect the lower radiator hose and drain the coolant. Refer to Draining and Filling Cooling System .
  2. Disconnect the upper radiator hose.
  3. Fig 2: View Of Thermostat Housing, Gasket, And Bolts
    GM1223134Courtesy of GENERAL MOTORS CORP.
  4. Remove the thermostat bolts (2).
  5. Remove the thermostat housing (3).
  6. Remove the thermostat with the gasket (1).
  7. Inspect the gasket for cracks or other damage.
  8. Inspect the valve seat for foreign matter that could prevent the valve from seating properly.
  9. Inspect the thermostat for proper operation. Refer to Thermostat Diagnosis .