THERMOSTAT(for Engine Coolant) INSPECTION

PROCEDURE


  1. INSPECT THERMOSTAT


    1. A004K38

      Immerse the thermostat in water and then gradually heat the water.

      Tech Tips

      Hold the thermostat with a wire or the like, so that the thermostat does not come into contact with the bottom of the container.

    2. Check the valve opening temperature of the thermostat.

      Standard valve opening temperature
      86 to 90 °C (187 to 194 °F)

      Tech Tips

      If the valve opening temperature is not as specified, replace the thermostat.

    3. Check the valve opening temperature.

    4. A004H82E02
      Text in Illustration
      *a Valve lift

      Check the valve lift.

      Valve lift
      8.0 mm (0.315 in.) or more at 95 °C (203 °F)

      Tech Tips

      If the valve lift value is not as specified, replace the thermostat.

    5. When the temperature of the thermostat drops below 83 °C (181 °F), check that the valve is fully closed.

      Tech Tips

      If the valve is not fully closed, replace the thermostat.