I have a 96 xlt 3.0 liter and for some reason it started running hot so I replaced the waterpump, fanclutch, thermostat, tensioner pulley, air filter, radiator, and I changed the oil. I can't even run my ac. without my gauge going 3/4 up. Someone suggested blown head gasket but the oil looked fine and no oil in my coolant! I also changed a few sensors.. Any ideas???