Re: 1937 120 Conv. Sedan - Blanche

Posted by kevinpackard On 2024/5/29 11:27:29

That tube is the overflow tube. If coolant level gets too high it drains out that tube and onto the ground. If your cooling system is unpressurized (I'm pretty sure it's unpressurized) then the tube sticks up a certain amount in the upper tank. Any coolant above that level goes in the tube and out to the road. My dad's '38 Super is this way, except the overflow tube is located under where the cap is.