Radiator Cap: Testing and Inspection

Inspection

Radiator Cap Testing

1. Remove the radiator cap, wet its seal with engine coolant, and then install it on a pressure tester.




2. Apply a pressure of 93.16 - 122.58kPa (0.95 - 1.25kgf/cm2, 13.51 - 17.78psi).
3. Check for a drop in pressure.
4. If the pressure drops, replace the cap.