why does the coolant go into the overflow tank
it is not a resivior tank it is a pressure expansion tank and as the antifreeze flow through the engine it gets hot and goes through the radiator and the engine fan blows the heat out of it and the boiling hot antifreeze will expand and if it has nowhere to go the engine will overheat
Looking for a Used Ranger in your area?
CarGurus has 5,805 nationwide Ranger listings starting at $1,650.
Search Ford Ranger Questions
Ford Ranger Experts