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mass A man · 05-06-2019, 11:30 PM

I had the same problem until I drained the Prestone and switched to Sierra antifreeze, 50/50 mix. No more foaming. Costs a tad more but it works.

05-06-2019, 11:30 PM	#2
mass A man Senior Member Join Date: Jun 2010 Location: Danvers, Ma. Posts: 794	Re: Foaming Coolant I had the same problem until I drained the Prestone and switched to Sierra antifreeze, 50/50 mix. No more foaming. Costs a tad more but it works.