I recently bought an 03 GT and it has had an issue with over heating. If I let it run for a while it will get hot without the fan coming on until the engine temp reaches about 245 degrees farenheit. The fan will come on if I turn on the air conditioning, but it does not cool the car. The dealer that I bought it from has looked at it twice and came to the conclusion that the radiator cap was not holding pressure so they replaced it, but I still have the same problem. Can someone help me out a little bit?