Repair Procedures: Inspection: Thermostat

WARNING: This page is about a different car, the 2021 Hyundai Kona. However, it is still accessible from the selected car via links, so may be relevant.

Immerse the only thermostat part in water and gradually heat the water.

Courtesy of HYUNDAI MOTOR AMERICA
NOTE:
- Don't immerse connector part.
Check the valve opening temperature.
If the valve opening temperature is not as specified, replace the thermostat.

Valve Opening Temperature:

100±2°C (212±3.6°F)

Full Opening Temperature:

115°C (239°F)
Check the valve lift.
If the valve lift is not as specified, replace the thermostat.

Valve Lift:

8 mm (0.3 in.) or more at 115°C (239°F)