That is probably a stupid question but I have had two Ford Rangers and the coolant reservoirs in both were always empty but I have never had any cooling problems. My Impala on the other hand, seems to be over filled. It is above the hot line when the engine is warm. Can this be harmful? One of my local shops filled it recently when they fixed a coolant leak.
As long as the actual radiator is filled to capacity, what is the clear plastic reservoir for?
As long as the actual radiator is filled to capacity, what is the clear plastic reservoir for?