Cleaning coolant overflow tank

[Russ Maki]

Hi Louis --
I wouldn't use CLR in the cooling system because it's very acidic. I believe
the label on the bottle recommends using rubber or vinyl gloves when
handling it. With the Audi's aluminum head, I'd just want to be very careful
with the stuff.

The citric acid is an easier issue. Here's a link from one of the Mercedes
diesel lists that offers some tips on flushing a cooling system with a
citric acid solution. http://cathey.dogear.com/SDLcool.html#acid

Please note that to prep the system for a citric acid flush, MB recommends
flushing the system first with a degreaser solution to clean out any
residual oil. The shadetree crowd at www.mbz.org recommends liquid
dishwashing detergent for that.

All that said, I haven't heard of a lot of scaling up problems in the
coolant jackets of Audi engines. Am I missing something?

Cheers,
Russ Maki
Ixonia, Wis.


----- Original Message ----- 
From: "L DC" <ldc007usa at yahoo.com>
To: "Russ Maki" <rinard at execpc.com>
Cc: <quattro at audifans.com>
Sent: Friday, April 16, 2004 10:51 AM
Subject: RE: Cleaning coolant overflow tank


> Hi Russ!!
>
> Can CLR be used to flush entire cooling system by
> running the engine, say 10 minutes or so, without
> adverse effects?
>
> "Mercedes-Benz specifies citric acid to clean out
> cooling system scale."
>
> Where can one get that stuff, besides the stealership?
>
> Best Regards,
>
> -Louis
>
>
>
>
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