[eagle]

First thing, don't buy the old wives tale about water pump pumping so fast that water piles up in the top tank before it can flow through the radiator. The water pump can only move water, not produce it. I would first make sure you don't have any leaks, antifreeze will seep and the leaks are not always noticeable if parked on gravel or dirt. Second, as others have mentioned, find a way to check actual coolant temps. Third, its simple enough to attach a hose onto the overflow tube and run it to a jug. That will give you an indication of where its going. The combustion gasses check in the radiator is simple and easy so that would also be a good check. Don't just accept some overheating! I've heard it a hundred times "Oh that's just how a Model A is, you can't push them too hard when going up hill". Baloney, if cooling system is in order they cool very well. However, this is all contingent on running the correct advance. Any Model A will overheat if you run them too retarded, and will be really tough on bearings if too advanced.