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: Identifying Cap Adapter
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
Increase the pressure until the indicator of the gauge stops moving.
Minimum limit: 83 kPa (12 psi)

Standard value: 93-123 kPa (14-18 psi)
Replace the radiator cap if the reading does not remain at or above the limit.