Radiator Cap Pressure Check

NOTE: Be sure that the cap is clean before testing. Rust or other foreign material on the cap seal will cause an improper reading.

Use a cap adapter to attach the cap to the tester.

Fig 1: Using Cap Adapter To Attach Cap To Tester
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
Increase the pressure until the indicator of the gauge stops moving.
1. Minimum limit: 83 kPa (12 psi)
2. Standard value: 93 - 123 kPa (14 - 18 psi)
Replace the radiator cap if the reading does not remain at or above the limit.