Radiator Cap: Testing and Inspection

Radiator Cap Valve Opening Pressure Check





1. Use a cap adapter to attach the cap to the tester.
2. Increase the pressure until the indicator of the gauge stops moving.
Limit: 65 kPa (9.2 psi)
Standard value: 75 - 105 kPa (11 - 15 psi)
3. Replace the cap if the reading does not remain at or above the limit.

NOTE: Be sure that the cap is clean before testing, since rust or other foreign material on the cap seal will cause an improper indication.