I want to know if the reservoir for the radiatior is vitally improtant.
I know it holds liquid for the radiator but am unsure how it works.
I get it that when there is to much liquid in the cooling system it flows out to this tank, but does it flow the other way???
I ask because I want to get rid of it and just run the overflow hose down the side of radiator or somthing and off to the ground.