Fig. 2.6. Special adapter for connecting the radiator cap to the tester
Use a special adapter to connect the radiator cap to the tester (Fig. 2.6).
Increase the pressure until the pressure gauge needle stops (valve opening pressure).
Main valve opening pressure: 83-110 kPa.
Vacuum valve opening pressure: 7 kPa.
Make sure that the opening pressure of the cover valves is either equal to the nominal value or slightly higher.
(The basis of the material is information from the website: hyundaibook.ru)
Replace the radiator cap if the valve opening pressure is below the nominal value.
Note: Make sure the radiator cap is clean before checking, as rust or other foreign matter on the cap gasket may cause incorrect pressure gauge readings.