Thermostat: Testing and Inspection

FA20 COOLING: THERMOSTAT (for Engine Coolant): INSPECTION; 2013 MY FR-S [03/2012 -]

1. INSPECT THERMOSTAT

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





HINT
Hold the thermostat with a wire or the like, so that the thermostat does not come into contact with the bottom of the container.

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

Standard valve opening temperature:

86 to 90 °C (187 to 194 °F)

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

(c) Check the valve opening temperature.

(d) Check the valve lift.









Valve lift:

8.0 mm (0.315 in.) or more at 95 °C (203 °F)

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

(e) When the temperature of the thermostat drops below 83 °C (181 °F), check that the valve is fully closed.

HINT
If the valve is not fully closed, replace the thermostat.