1. Inspect the thermostat for the following.WARNING:
During inspection, the thermostat and water are extremely hot and can cause severe burns. Do not touch the thermostat and water.
The valve should not open under normal temperature.
Opening temperature and valve lift
If there is malfunction, replace the thermostat.
Thermostat initial-opening temperature
80—84 °C {176—183 °F}
Thermostat full-open temperature
97 °C {207 °F}
Thermostat full-open lift
More than 8.0 mm {0.31 in}