i know its not my powerstroke but i cracked my radiator last night and just got back from picking a new one. i took my old one out but here is my question. i put that crappy stop leak in my truck before i took the cracked radiator out and now i want to get it out, how do i flush my cooling system with the radiator out because i dont wanna put my new one in and get that junk in there. thanks for the help in advance
