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Home >> Chevrolet >> 2005 >> Aveo Base, 4D Hatchback >> Repair and Diagnosis >> External Pages >> Different car >> Section 85 (Engine Cooling System) >> Repair Instructions >> Engine Coolant Thermostat Replacement (1.4/1.5L SOHC) >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2008 Suzuki Swift +, 2008 Pontiac Wave, and 2008 Chevrolet Aveo. However, it is still accessible from the selected car via links, so may be relevant.
    CAUTION: To avoid being burned, do not remove the radiator cap or surge tank cap while the engine is hot. The cooling system will release scalding fluid and steam under pressure if radiator cap or surge tank cap is removed while the engine and radiator are still hot.
    Fig 1: View Of Upper Radiator Hose
    GM1241808Courtesy of GENERAL MOTORS CORP.
  1. Drain the coolant. Refer to Cooling System Draining and Filling .
  2. Remove the timing belt rear hood. Refer to Timing Belt Replacement.
  3. Loosen the hose clamp on the upper radiator hose at the thermostat housing.
  4. Disconnect the upper radiator hose from the thermostat housing.
  5. Fig 2: View Of Thermostat Housing
    GM1241809Courtesy of GENERAL MOTORS CORP.
  6. Remove the mounting bolts that hold the thermostat housing to the cylinder head.
  7. Remove the thermostat housing from the cylinder head.
  8. Remove the thermostat from its recess in the cylinder head.
  9. Inspect the valve seat for foreign matter that could prevent the valve from sealing properly.
  10. Clean the thermostat housing and the cylinder head mating surfaces.