The Stovebolt Site Forums The Shop Area Engine Shop Radiator question on 37' pickup

I actually run an over flow tank on my 37 and I have it mounted inside the grill chin under the wind dam that goes from the front of the chin up to the bottom radiator. It is a nice size, but small enough to hide in that spot. I have found if I keep a piece of hose running from the radiator overflow tube into the bottom of the overflow tank, it will fill when hot and draw the water back into the radiator when it cools down. I haven't added any water or coolant to the radiator in years. It works like a closed system because I closed it with the overflow tank. Pressure on the cap doesn't make any difference as long as it is a "closed" system.