run the car for a few minutes with the radiator cap off and all the bubbles should flow out the top. if not get the special tool that hooks on top of the radiator and has a connection to a air compressor it has a switch and it you turn it one way it will suck out all the air in your system and there is another hose you stick down in a gallon of anti freeze turn the switch the other way and it will fill your radiator with anti freeze. disconnect and top off, your problem should be solved. (only do this if the first option dont work)