What If I Overfill My Coolant
What If I Overfill My Coolant . How a radiator overflow tank works. The above posters are right in that 'excess' coolant will just be pushed out of the reservoir tank when the system expands. Mishimoto Coolant Reservoir Install StanceCoalition from stancecoalition.com Your coolant system is designed to handle a certain amount of pressure. That being said, when i had the cooling system overhauled on my 330ci i had to have the level just below/on the minimum as coolant kept escaping from the (also new) pressure cap if it was any higher. Best is to siphon excess coolant using a turkey baster and save it in the coolant bottle in your garage.