Quiz: What role do coolant and coolant systems play in maintaining May 19, 2025 by Alex Turner What role do coolant and coolant systems play in maintaining engine performance? Discover more about Vehicle Engine and Automobile at our home page. A) They regulate the engine temperature and prevent overheating. B) They enhance fuel efficiency by increasing combustion rates. C) They lubricate engine components to reduce friction. D) They filter out impurities from the fuel before combustion. Submit Answer