Straight Muriatic acid is very strong. Don't use it straight if you must
use it at all. The rad shops bottle must have been diluted. I used this
stuff to etch my concrete garage floor before I painted it. Its nasty
stuff! Just use off the shelf rad flush.
Peter S
----- Original Message -----
From: Craig Smith <CraigS@iewc.com>
To: 'david' <engstrom@tstonramp.com>; <spitfires@autox.team.net>
Sent: Wednesday, August 04, 1999 4:05 AM
Subject: RE: cooling system
>
> I was at a local shop and watched a guy take standard muratic acid and
pour
> some down a radiator be fore they went to put it in the "tub" to check for
> leaks.
> This stuff is cheap and can be bought most everywhere.
> The other acids even diluted might be a little strong.
>
>
> -----Original Message-----
> From: david [mailto:engstrom@tstonramp.com]
> Sent: Tuesday, August 03, 1999 11:15 PM
> 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
>
|