Rick's Free Auto Repair Advice

Posts Tagged: change engine coolant

Why change engine coolant?

Do you really have to change your engine coolant? by Alex Steil Well, yes you do. The reason people ask the question in the first place is because the base fluids in coolant, like polyethylene glycol and polypropylene glycol don’t wear out and don’t lose their freeze protection properties. But engine coolant does more than just prevent freezing. Coolant also lubricates the water pump and prevents corrosion and galvanic action. What wears out in coolant? The anti-corrosion additives have a limited lifespan. Once they wear out, the dissimilar metals in … Read More


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