Tyler If you were losing coolant into one of the cylinders it would show up in the exhaust, also your plugs would show this as well. If the engine is runing strong and takes a while to overheat your problem is probably not internal. I agree with Stuart, take a good close look at you waterpump, radiator and hose fittings, don't forget to check your heater core. It may be worht your time to have the system pressure checked at a radiator shop. Good luck and let us know what you find.
