Ok I guess I got the two mixed up. Thanks for clearing it up for me. Does anyone know when the high speed fan should come on? I have never seen the damn thing on and I am running a littel warm right now (doesn't over heat just runs right at the middle most of the time never use to get to the N). I have a 197 t-stat with under drive pulleys and a good mix of anti-freeze . Can you burp the cooling system while the car is cold, or do I have to warm her up? Thanks again for the help.