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Old 03-22-2018, 04:40 AM   #7
JFP in PA
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Join Date: Feb 2005
Location: It's a kind of magic.....
Posts: 6,617
Quote:
Originally Posted by rexcramer View Post
Here is a topic I have never seen discussed. Has anybody used a 'flush chemical' prior to refilling? I am going to guess the OEM fluid group hasn't. What about the Prestone faithful? Prestone makes a 'flush and cleaner.' Back in the day when the earth was flat, I always used a flush on my cast iron blocks before replacing the anti-freeze.

Most threads/videos speak to flushing once or twice with distilled only.
Unless you want to replace your water pump, I would suggest against it. We only use flush chemicals in the case of an intermix, other wise just flush it with clear water.
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