Just went through this and posted it on another post having a cooling problem. Get yourself a good laser temp gun. You will be able to see where the heat is and locate the problem. I also don't trust gauges until I check them with the laser. Sounds to me like you are having the same issue I just had. The cooling ports plugged at the head gasket causing a coolant flow restriction. The laser temp gun will allow you to pinpoint where the problem is, hope it helps. Troy
