I just got my Del Sol about a week ago, and just yesterday, it started over heating. The temp gage went all the way up, past "H". I am assuming this is the thermostat, and was just wondering on how much this would cost, and if it is something easy to do, or should I pay the money, and have a shop do it? Also, anything else that could be wrong?!! The radiator is ok....and the fans work. Thanks guys