Thermostat - Inspection

  1. Inspect the thermostat at room temperature. If the thermostat is open, it must be replaced.
  2. To check the thermostat is opening at the correct temperature, suspend the thermostat in a suitable container of water and raise the temperature of the water until the thermostat opens.
  3. Measure the water temperature with an accurate thermometer.
    4. * Refer to the coolant specifications section for the correct thermostat opening temperature.
  4. If the temperature at which thermostat opening takes place is incorrect, replace the thermostat.