Fig. 2.197. Special adapter for connecting the radiator cap to the tester
Use a special adapter to connect the radiator cap to the tester (Fig. 2.197).
Increase the pressure until the pressure gauge needle stops (valve opening pressure).
Main valve opening pressure: 107.9±14.7 kPa.
Main valve closing pressure: 83.4 kPa.
Make sure that the opening pressure of the cover valves is either equal to the nominal value or slightly higher.
(The article is borrowed 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.