Tag Archives: fluid flush

Why do I need a coolant flush?

This is what clean coolant looks like. Coolant is a 50-50 mixture of antifreeze and water.

Question: My owner’s manual shows that I’m due for a coolant flush at 90,000 miles. What does coolant do? And do I really need a coolant flush?  Answer: A coolant flush or cooling system flush is modern-day terminology for ridding your radiator of rust, dirt, sludge and old antifreeze or “radiator fluid.” The fluid is more accurately known as coolant, which is a 50-50 mix of antifreeze and water. And yes, flushing the cooling system is an important part of your car’s preventive maintenance schedule. Why? Because coolant keeps your engine from overheating—which keeps you from sitting by the side … Continue reading