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Old 06-16-2022, 06:17 PM   #3
VeryTangled
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Join Date: May 2010
Location: (Not far enough...) Outside of DC
Posts: 3,387
Default Re: Flathead Coolant

I run 50/50 with distilled water. The water pump builder I use (Skip Haney) recommends water wetter but I hadn't found it necessary for either of my cars to run within acceptable boundaries.
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