Signs you need a Coolant Flush
Don’t wait until your coolant is discolored and funky looking. Make sure to flush your antifreeze coolant at the time and mileage recommended by the automaker.
In some cases, if the coolant goes long enough without service, it will start to darken and become brownish in color. But you don’t want to let it get to that point. That’s why you should have your coolant flushed per the recommended service schedule.
If you’ve got antifreeze gunk build-up in your radiator or radiator hose, your car is long overdue for a coolant flush. Deteriorated coolant becomes acidic and eats away at metal cooling system components in your radiator and other parts of the engine. Eventually, the un-flushed coolant/debris mixture, in your radiator, turns into a brown sludge that can clog vital parts in your radiator hose and other parts of your engine, leading to engine overheating. A good routine flush of your antifreeze coolant system helps us avoid this problem.