Date: 11 Sep 95 07:15:00 PDT
Sender: Vanagon Mailing List <vanagon@vanagon.com>
From: BOWMANR%em.EDW@mhs.elan.af.mil (Mr.Roger Bowman)
Subject: Sierra Propylene Glycol Coolant?
--PartBoundary Mon Sep 11 07:16:58 6200524
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1. Can PROPYLENE Glycol be used in a Vanagon instead of of ETHYLENE Glycol?
2. Does VW have any official stance on this?
3. Does anyone on the list have any experience with this product?
Thanks in advance for the information.
Jim Davis
87 Syncro
88 Wolfsburg
_________________________________________________________________
The key, in my opinion, is the lack (for whatever reason) of phosphates.
Ethylene/propylene glycol provide the heat exchange fluid, just like water
would, and some additional additives (about 5% of the total volume) provide
the real corrosion protection. The glycol is just the fluid, with fewer of
the problems that water has (corrrosion-wise). Water, in fact, is a better
heat exchange fluid, but problematic; it boils, evaoprates, and corrodes
things; glycols do these things as well, but at higher tempratures, lower
rates, and lesser amounts respectivly.
I really don't understand the need to keep the phosphates out of the system,
but it does seem to be a requirement, and has been so since at least 1989
when my 1990 VW Vanagon was manufactured (!). Having spent some small
amount of time as a professional mechanic, I cannot recall even seeing
phosphate free coolant availible until....well, time came to change my VW
coolant. Even then, I had to look around, and pay a premium.
I would not object to refilling with the propylene glycol, provided it is in
fact "phosphate free"
bowmanr%em@mhs.elan.af.mil
Live Smart. Think for yourself. Transform the future.
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