It is flowing through the radiator. My Dad built this motor and before he could tune it, moved out of the country. He degreed the cam when he built it. The carb was new out of the box and I have not done anything with it except make sure the fuel air screws were out 2 1/2 turns. It also idles at 800 rpms. I have not got to the point of putting a new thermostat in. Thanks for the suggestions.