Acidizing chemical plant process piping to remove corrosion and deposits with minimal attack of the good stuff is done with inhibited muriatic (hydrochloric) acid--often with heat and almost always with circulation. I would not recommend it for motor vehicle (c3oo)ling systems as the inhibitors prevent attack of metallic components and are carefully selected and dosed for the job. Disposal of spent acid solution must also be done carefully to protect the environment, eyes, skin, paint, garage floors, sewer piping and the wastewater treatment plant. If you decide to play boy chemist, rubber gloves and goggles are recommended--as well as plastic (not galvanized) buckets to catch the cleaning solution. C-300'ly, Rich Barber 1955 Chrysler C-300 -----Original Message----- From: Chrysler300@xxxxxxxxxxxxxxx [mailto:Chrysler300@xxxxxxxxxxxxxxx] On Behalf Of mgoodknight@xxxxxxxx Sent: Wednesday, September 02, 2009 10:48 AM To: jblken@xxxxxxxxxxx Cc: allynentertainment@xxxxxxxxx; Chrysler300@xxxxxxxxxxxxxxx Subject: Re: [Chrysler300] Radiator Clean Out Oxalic acid crystals are available from cleaning chemical companies. Formerly that was the primary component of Dupont #7 radiator cleaner----if my memory serves me correctly. Similarly you must follow the cleaning routine with a neutralizer, usually baking soda. I don't think that is as harsh as muriatic acid. ----------------mg ---------- Original Message ---------- From: Kenneth Wilson <jblken@xxxxxxxxxxx> To: Matt Allyn <allynentertainment@xxxxxxxxx>, Chrysler300@xxxxxxxxxxxxxxx Subject: Re: [Chrysler300] Radiator Clean Out Date: Tue, 01 Sep 2009 22:18:44 -0700 Matt; I used Murattic acid (a gallon of pool cleaner will do). Run it through the system for a bit - re-flush it out and with baking soda to neutralize any residue acid. Another product I use to use was Ironcad (or was it Irontite- I think that is thecorrect name). May be hard to find and is expensive but was the best radiator cleaner (it's is a two part cleaner). ken wilson 62 H and sport 300 Matt Allyn wrote: >Some of the tubes in my 1962 300 are somewhat plugged with good old rust flakes. > >Is a good flush in order? >OR >Is there any good product out there that helps disolve and rid of the flakes ALONG with flushing the system and adding a new gallon of coolant? > >Thanks! > >Matt Allyn > > ------------------------------------ To send a message to this group, send an email to: Chrysler300@xxxxxxxxxxxxxxx For list server instructions, go to http://www.chrysler300club.com/yahoolist/inst.htm For archives go to http://www.forwardlook.net/300-archive/Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Chrysler300/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/Chrysler300/join (Yahoo! ID required) <*> To change settings via email: mailto:Chrysler300-digest@xxxxxxxxxxxxxxx mailto:Chrysler300-fullfeatured@xxxxxxxxxxxxxxx <*> To unsubscribe from this group, send an email to: Chrysler300-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/