Thermostat: Testing and Inspection

1NZ-FE COOLING: THERMOSTAT (for Hatchback): INSPECTION

1. INSPECT THERMOSTAT

(a) Immerse the thermostat in water and gradually heat the water.





(b) Check the valve opening temperature of the thermostat.

Valve opening temperature:

80 to 84°C (176 to 183°F)

If the valve opening temperature is not as specified, replace the thermostat.

(c) Check the valve lift.





Text in Illustration





Valve lift:

8.5 mm (0.335 in.) or more at 95°C (203°F)

If the valve lift is not as specified, replace the thermostat.

(d) Check that the valve is fully closed when the thermostat is at low temperatures (below 77°C (171°F))

If not fully closed, replace the thermostat.