I think that I need a heater core. Last night needed heat and antifreeze came out. But today used car and no leak, did not require heat . Is it still heater core. I thought that if it were heater core i would always have antifrezze coming into cablin regardless of it the heat is on or not?? Can any one Help in this . thank you. If I need heater core does anyone know how much I;m looking at . and should I have dealership handle or my foreiggn mechanic?? thanks howie