Re: Sorry for repeated question but what to use when flushing cooling system out?
Flathead V8: Drained cooling system, filled with 2 gallons of white vinegar. Ran the car for almost 2 weeks. Drained cooling system, refilled with 2 cups of baking soda (added to water), then refilled system with water. Ran for an hour driving around. Drained system again, refilled with water. Worked great.
Jim
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