What Does Brown Sludge In Coolant Mean?
What Does Brown Sludge In Coolant Mean? What does brown sludge in coolant mean? Corrosion – this is the most common cause of sludge build-up in a radiator. Radiators, like most parts in your engine, are made of metal. Over time, antifreeze can degrade. As it degrades, coolant loses its protective qualities, PH levels change,