1. Remove the thermostat. (See THERMOSTAT REMOVAL/INSTALLATION [SKYACTIV-G 2.5].)
2. Visually check that the thermostat valve is closed.
3. Place the thermostat in water.WARNING:
During inspection, the thermostat and water are extremely hot and can cause severe burns. Do not touch the thermostat and water.
4. Heat the water and check the following.
Opening temperature and valve lift
If there is a malfunction, replace the thermostat.
Thermostat initial-opening temperature
80.5—83.5 °C {177—182 °F}
Thermostat full-open temperature
95 °C {203 °F}
Thermostat full-open lift
8.5 mm {0.33 in} or more