Getting coolant levels right is important for maintaining the engine and preventing it from overheating. Specific instances call for draining old coolant first.
The coolant in your car's radiator is not a forever liquid. Consumable fluids like engine oil, automatic transmission, and brake fluid need periodic replacement to keep your vehicle running reliably ...
The average car has around 30,000 parts and many fluids are used to keep them running properly. The most important fluids are motor oil, transmission fluid, brake fluid, washer fluid and coolant.