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:
[ 2.4L Engine] 87± 1.5°C (189± 3°F)
[3.8L Engine] 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