Hello to everyone. Anyone have any thoughts or experience with
derusting a spit cooling system with phosphoric acid? I was pondering
filling my system with 0.1 molar phosphoric acid and running it for
maybe 20 minutes and then letting it sit overnight, then another 20
minute run, then 2 or 3 flushes to dilute the acid/rust out. I don't
think the acid would do any damage but I'm not sure. My system has a lot
of rust in it. I ran the engine at 2k rpm for a half hour and the temp
gauge equilibrated at the center of its range, also the engine never
felt/showed any symptoms of excessive heat. But, of course, I'm
concerned about local hot spots in the engine due to local coolant
blockage caused by rust deposits. This is a mk2 that sat for 10 years,
and has probably never had the cooling system cleaned. Also, anyone know
where can I obtain phosphoric acid?
Thanks, David
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