Thermostat: Testing and Inspection
THERMOSTATINSPECTION
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] 82 ± 1.5° C (180 ± 3° F)
[3.8L Engine] 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 compare the valve height when the thermostat is fully open.
Standard value:
Full-opening temperature:
[2.4L Engine] 95° C (203° F)
[3.8L Engine] 100° C (212° 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