[WHN]

As others have said, you have other problems besides your fan.

I would look at your radiator first. Than flush out your engine block.

Remember, like the Model T, the Model A is designed with a syphon cooling system. 32 gallons per minute if every thing is clean. The radiator being the most important part.

Take the bottom hose off your radiator, cover opening with duct tape.fill radiator with water now remove tape. Radiator should drain completely in a couple of seconds. If not you have a problem.

Leave radiator cap off. Good luck.