Repair Procedures: Inspection

WARNING: This page is about a different car, the 2023 Kia Seltos. However, it is still accessible from the selected car via links, so may be relevant.

Immerse the thermostat in water and gradually heat the water.

Courtesy of KIA MOTORS AMERICA, INC.
Check the valve opening temperature.
Valve opening temperature:

82 ± 1.5°C (179.6 ± 2.7°F)

Full opening temperature: 95°C (203°F)

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

Valve lift: 8 mm (0.3 in) or more at 95°C (203°F)

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