Re: antifreeze problemo

["Fred Munro" <munrof@isys.ca>]

I just drained the coolant from my '91 200q. It was yellow. The OEM Autobahn
coolant I purchased to replace it is green. I don't think you can tell
whether the coolant is phosphate-free by it's colour.
    I seem to recall reading something about scaling resulting from
phosphate-based coolants - I think the scale was calcium-based. Corrosion
occurs under the scale deposits. If you are concerned, flush your system and
use the phosphate-free coolant. I don't think you have run the phosphate
coolant long enough to form scale.

HTH

Fred Munro
'91 200q  257k km  (currently O/S for it's 250k refurb)

-----Original Message-----
From: Virtual Bob <h93young@creighton.edu>
To: Audi q-list <quattro@coimbra.ans.net>
Date: Friday, August 28, 1998 6:23 PM
Subject: antifreeze problemo


>My local idiot of dealer replaced the supposedly red coolant with green
>one. Could someone tell me of green antifreeze contains phosphate or not?
>I notice many domestic coolant manufacturers still lable their
>phosphate-containing antifreeze "aluminum safe" -- and for now, this is
>the excuse the dealer is using. When I talked to the parts guy, he said
>yes, the OEM antifreeze is red (or pink, orange, whatever).
>
>So who's right? Should I be worried? Is green=phosphate or not? Is it
>aluminum safe? Is red=no phosphate? Can I mix green and red stuff?
>
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