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Old 12-24-2002, 11:45 AM
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Join Date: Sep 2002
Location: San Diego, CA
Posts: 64
Question Citric Acid Flush or the Degreaser, which 1st

I conducted a search and only came up with some info but not the answer I was looking for. I changed the head gasket and need to flush out the cooling system. I went to the local dealer and purchased the citric acid powder and a degreaser powder the tech said I should use as well. I have read about on this site as well as a degreaser type powder. Which one should I use first? Dealer guy said drain insert degreaser and water, run for 10 minutes and repeat with the same process with the citric acid. He said I might just have to do it twice with each.

The degreaser looked pretty toxic as the warning labels showed " drop of acid eating through a finger"

Thanks for the help.
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Old 12-24-2002, 12:01 PM
jbaj007's Avatar
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Join Date: Jun 2001
Location: Santa Monica, CA
Posts: 2,053
Degreaser first, so the citric acid can reach the "scale" to work secondly.
The Golden Rule

1984 300SD (bought new, sold it in 1988, bought it back 13 yrs. later)
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Old 12-27-2002, 12:32 PM
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Join Date: Sep 2002
Location: San Diego, CA
Posts: 64
Thanks, makes sense.
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