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Old 05-12-2015, 10:09 AM   #6
djmarchand's Avatar
City: Litchfield, Ct/Punta Gorda, Fl
Country: USA
Vessel Model: Atlas Pompano 23
Join Date: Aug 2012
Posts: 4,904
Circulating is the best approach but filling and soaking will also work. But...

Make sure that the tubes of the heat exchanger are clear and open. Remove the end caps and look inside and rod them out with a dowel, brazing rod, gun cleaning rod, etc. They need to at least have some opening or the cleaning solution won't do any good on that tube.

And BTW, if your engine has a sea water cooled aftercooler, disassemble, clean, grease, reassemble and pressure test before acid cleaning. Otherwise you might get an engine full of acid.

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