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Old 01-19-2022, 05:29 PM   #7
leon bee
Senior Member
 
Join Date: May 2017
Location: Arkansas
Posts: 611
Default Re: Any tired and true method or suggestions

Kinda low-tech, but I filled my old Buick radiator with vinegar and drove her some for a few days. Did that along with the pantyhose filter at the radiator input and couldn't hardly believe how much crud I got out. Haven't tried that on a flathead V8 yet.
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