I don't know how well it would work, but the principle should be ok. I
would descale the cooling system first. Otherwise you are wasting energy
treating rust flakes that will fall off anyhow and not getting to the root
of the problem. Is there anything in there the phosphoric acid will damage?
Patrick Bowen
-----Original Message-----
From: david [mailto:engstrom@tstonramp.com]
Sent: Wednesday, August 04, 1999 12:15 AM
To: spitfires@autox.team.net
Subject: cooling system
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
|