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2004 MINI Cooper - cold weather overheating

cold weather overheating

On possibility, if coolant was too dilute with water thereby raising the freezing point, coolant could have frozen and not circulated through the engine. Don’t ask how I know this…lol

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That’s my guess, too! Your anti-freeze wasn’t a high enough concentration to prevent freezing, so it froze up. You might now have a leak when it thaws out - a big one.

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