I bought my first mustang a couple weeks ago, and while i was driving the timing belt snapped. I had a friend who is a mechanic replace it for me, but for some reason, there was not much power, and it took me forever to pull away from a red light. So i had another friend look at it, he re-adjusted the timing belt, now my car has the power its suppose to. BUT it overheats fast, and the fan will not turn on till the temperature needle is in the red. Or sometimes it wont turn on at all. Does anybody know what i can do?