Mitsubishi 3000GT 1991 Service Manual page 301

COOLING - Service Adiustment Procedures.
ENGINE COOLANT LEAK CHECK
2. Confirm that the engine coolant level is up to the filler neck.
3. Install an adapter to the water outlet fitting and apply 160
checking for leakage from the radiator, hose or connec-
tions.
Caution
Be sure to completely clean away any moisture from
the places checked.
When
engine coolant from it.
Be careful, when installing and removing the tester and
when testing, not to deform the water outlet fitting.
4. If there is leakage, repair or replace the appropriate part.
CAP PRESSURE TEST
1. Use a special tool 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)
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.
ENGINE COOLANT REPLACEMENT
Refer to GROUP 00 - Maintenance Service.
ENGINE COOLANT CONCENTRATION TEST
Refer to GROUP 00 - Selection of Coolant.
the tester is removed, be careful not to spill any