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Originally Posted by 19Fordy
Great news. Glad it worked. Did you use straight white vinegar or did you dilute it?
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Yes, I did use 100% white vinegar. The Prestone flush I used foamed a great deal and when I drained the flush out the radiator interior was not even stained and the radiator cap interior was without rust or stain. Good stuff in my way of thinking. The only place I could find the Prestone flush was O'Reily's Auto Parts.