[s-cars] Gelling coolant

[Tom Green]

There are technical bulletins from Audi warning that mixing the red  
(or pink)
coolant with others can cause a brown sludge to form that can clog  
the cooling
system.  The recommendation is a thorough flush with a cleaner before  
switching
coolants.

I don't know the remedy after a coolant mix has gelled, but I assume  
the flush,
flush, flush with a cleaner should be done as soon as possible,  
including the
heater.

Tom

> Date: Mon, 16 Apr 2007 09:04:39 +0000
> From: " G?sli ?ttarsson " <gislio at gmail.com>
> Subject: [s-cars] Gelling coolant
> To: "S-car list" <s-car-list at audifans.com>
> Message-ID:
> 	<22d42dd20704160204s60fe63fao95e4ac282a5f86d6 at mail.gmail.com>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> I have noticed that the coolant in the expansion tank has a strange  
> texture
> to it.  It is almost like it is beginning to gel.
>
> Any ideas what the story might be?  Can this be due to some kind of  
> a mixing
> of incompatible coolants and all I need is a complete flush, or is  
> this
> something else, possibly worse.  Is there anything I should do or  
> some test
> I should run before I pull the trigger on the flush?
>
> Ideas?
>
>   Gisli,  ('01 S8)