Hey fellas, I"ve got a problem with my 3600 gasser. I"m losing water somewhere in the system and I can"t figure out where. When I run the engine under a moderate load for an hour or so the temp gauge reaches red. The radiator overflow hose spits out steam/water. After it cools down I check the water level and it is always down about a gallon. The water pump is circulating, the thermostat has been checked, no water in the oil, and no visible leaks. Before each use I top off the radiator and every time I end up losing about a gallon.I don"t know if all the water loss is from the overflow tube or if I"m losing it somewhere else which would cause overheating and the radiator tube is just blowing off steam. Is it possible the head gasket is blown on the exhaust side? It runs fine. Thanks for any help or suggestions!