Coolant system flush

Cya

New Member
Aug 12, 2005
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Columbia, S.C>
I've flushed it three times now and im still getting brown fluid any suggestions?

Oh i've tried the Prestone Cleaner, Prestone Flush and hell and even tried the Simple green.
 

jdub

Official SM Expert: Motor Oil, Lubricants & Fil
SM Expert
Feb 10, 2006
10,730
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Valley of the Sun
Did you use Prestone Heavy Duty Cleaner? It's a two part powdered product that includes a neutralizer. If not get some oxalic acid from a chemical supply or ebay, it's the same chemical used in the Prestone. Neutralize with sodium carbonate (soda ash). If this doesn't clean it out, nothing will. Make sure you completely flush it out of the system.