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It is not recommended to put plain water in the engine coolant reservoir as a substitute for coolant. While water can temporarily help lower engine temperatures, it lacks the necessary additives to prevent corrosion, raise the boiling point, and lower the freezing point. If you must use water in an emergency, it’s best to replace it with the proper coolant mixture as soon as possible. Always check your vehicle's manual for specific recommendations.

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AnswerBot

17h ago

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