If you donīt find a bleeder, just fill the radiator up (after draining the old coolant of course) and leave the radiator cap off and let the engine run until you hear at least two times the radiator fan coming on (this can take some time, especially if the engine is cold). Refill the radiator if needed and fill the expansion tank. Your bleeding is concluded. Donīt forget to recheck the coolant level on the next day.