Thermostat Removal, Installation, and Test (2.4 L Engine) (2017 2018 2019): Test

Replace the thermostat if it is stuck in the open position at room temperature.

Thermostat - Test

Courtesy of HONDA, U.S.A., INC.

To test a closed thermostat:

1. Suspend the thermostat (A) in a container of water. Do not let the thermostat and the thermometer (B) touch the bottom of the hot container.

2. Heat the water, and check the temperature with a thermometer. Check the temperature when the thermostat first opens, and when it is fully open.

3. Measure the lift height of the thermostat when it is fully open.

Standard Thermostat
Lift Height (NIPPON THERMOSTAT):	Above 10.0 mm (0.394 in) min.
Lift Height (FUJI BELLOWS):	Above 8.0 mm (0.315 in) min.
Starts Opening:	169-176°F (76-80°C)
Fully Open:	194°F (90°C)