I had this problem at little sahara. It would constantly get up into the 230 degree range and kept spitting out coolant even when i wasn't ripping it. It turned out to be a bad head gasket letting compression into the cooling system, which forced coolant to spew out, thus, overheating. This also got hot and caused the stock impellar to warp, which wasn't helping things, we replaced that, and the head gasket, and now it runs cooler than ever.