RDX AWD L4-2.3L Turbo (2010)
Thermostat: Testing and Inspection
Thermostat Test
Replace the thermostat See: Service and Repair/Thermostat Replacement if it is stuck in the open position at room temperature.
To test a closed thermostat:
1. Suspend the thermostat assembly (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 again when it is fully
open.
3. Measure the lift height of the thermostat when it is fully open.
Standard Thermostat