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Services > Auto Q & A > Cooling System Flush And Fill

Question: What is a cooling system flush and fill?

Answer: Most of the energy created from your vehicle’s gasoline is converted to heat energy. Your engine produces large amounts of heat that must be controlled by your engine’s cooling system. A cooling system keeps your vehicle’s engine from overheating, but it also allows the engine to become hot very quickly and stay at a constant temperature. Engines are less efficient and more prone to pollution when they are cold. Cooling systems use fluid called antifreeze to control the engine’s temperature. Engine coolants must be able to withstand temperatures below 0 degrees without freezing and above 250 degrees without boiling. Water is very capable of withstanding heat, but it also freezes at temperatures too high to be suited for your engine. Therefore, your vehicle uses a substance called ethylene glycol, which improves boiling and freezing points; ethylene glycol is mixed with water to control your engine’s temperature. This substance is also called antifreeze. Antifreeze is typically 50% water and 50% ethylene glycol. It travels through the engine’s pipes and passageways to absorb heat and cool the engine. It also contains rust and corrosion inhibitors as well as lubricants.A cooling system flush and fill is very simple. Your vehicle’s old engine coolant/antifreeze is drained from the radiator, your cooling system is flushed, and new antifreeze is added to the radiator.

Question: Why do you need a cooling system flush and fill?

Answer: Antifreeze protects your engine fluid from freezing or boiling. It is very important to check the level and condition of your antifreeze regularly. Coolant levels should be checked only when an engine is completely cool. Engine coolant may still be very hot and can lead to burns if you check your coolant levels too early. Any significant loss of antifreeze usually means you have a leak or your engine is running too hot. Driving on old engine coolant is one of the leading sources of cooling system failures. This means that your engine is too cold to start or overheats and shuts down. An engine that is overheating can soon self-destruct.

Question: When should you replaced your engine cooling fluid?

Answer: Antifreeze should be replaced every 2 years or 30,000 miles. Antifreeze contains certain rust and corrosion inhibitors that lose their effectiveness, which can lead to build up and overheating in your engine. A flush is required to clean the cooling system, and new engine coolant fluid/antifreeze is added to ensure your cooling system is working properly.