Radiator Cap Testing
WARNING: This page is about a different car, the 2018 Kia Cadenza. However, it is still accessible from the selected car via links, so may be relevant.
- Remove the radiator cap, wet its seal with engine coolant, and then install it on a pressure tester.
- Apply a pressure of 79.43-122.58 kpa (0.81-1.25 kg/cm2 , 11.52-17.78 psi).
- Check for a drop in pressure.
- If the pressure drops, replace the cap.