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:
Valve opening temperature: 82 ±1.5°C (180 ±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 compare the valve height when the thermostat is fully open.

Standard value:
Full-opening temperature: 95°C (203° F)
Amount of valve lift:
[2.4L Engine] 8.5 mm (0.33 inch) or more
[3.8L Engine] 9.0 mm (0.35 inch) or more