Thermostat

Replacement

NOTE: Use new gaskets and 0-rings when reassembling.

Testing

Replace thermostat if it is open at room temperature.

To test a closed thermostat:
1 . Suspend the thermostat in a container of water as shown.
2. Heat the water and check the temperature with a thermometer. Check the temperature at which the thermostat first opens and at full lift.
CAUTION: Do not let the thermometer touch the bottom of the hot container.

3. Measure the lift height of the thermostat when it's full open.
STANDARD THERMOSTAT Starts opening:
D15Z1:82±20C (180±4°F)
Others: 7812°C (172±4°F) Fully open:
D15Z1:950C (203°F)
Others: 90°C (194°F)
Lift height: 8.0 mm (0.31 in)