This summer I will be driving from Florida to Oklahoma. There are several routes that I can take, but more then likely I will be staying in warm areas. My AC went out a few years ago and I never bothered to replace but I am thinking about putting a new compressor in (pretty sure that's the problem). Will running AC lead to my motor overheating? I plan on staying on highways for the trip. My Jeep is a 98 w/175K.