Thermostat: Testing and Inspection

2UR-GSE COOLING: THERMOSTAT: INSPECTION

INSPECTION

1. INSPECT WATER INLET SUB-ASSEMBLY WITH THERMOSTAT
HINT: The water inlet sub-assembly with thermostat is stamped with the valve opening temperature.









(a) Immerse the water inlet sub-assembly with thermostat in water and gradually heat the water.
(b) Check the valve opening temperature.
Standard valve opening temperature:
80 to 84°C (176 to 183°F)
If the valve opening temperature is not within the specified range, replace the water inlet sub-assembly with thermostat.





(c) Check the valve lift.
Standard valve lift:
10.0 mm (0.394 in.) or more at 95°C (203°F)
If the valve lift is not as specified, replace the water inlet sub-assembly with thermostat.
(d) Check that the valve closes when the water inlet sub-assembly with thermostat is at a low temperature (below 77°C (171°F)).
If it does not close as specified, replace the water inlet sub-assembly with thermostat.