Thermostat: Testing and Inspection

INSPECTION
Thermostat Check





1. Immerse the thermostat in water, and heat the water while stirring. Check the thermostat valve opening temperature.
Standard value: 88 ± 1.5 °C (190 ± 3 °F)





2. Check that the amount of valve lift is at the standard value when the water is at the full-opening temperature.

NOTE: Measure the valve height when the thermostat is fully closed, and use this measurement to calculate the valve height when the thermostat is fully open.

Standard value:
Full opening temperature 100 °C (212 °F)
Amount of valve lift
2.4L 8.5 mm (0.33 in.) or more
3.0L 9.0 mm (0.35 in.) or more