I guess you didn't read the article.

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
Michael Snow
Sent: Wednesday, December 02, 2009 9:44 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Re: weak coolant - winter's approaching!

On Wed, Dec 2, 2009 at 6:38 PM, Mark <mbrush@gmail.com> wrote:
> So here's a question - maybe an easy one... So I'm in the middle of a
> flush-n-fill with ye olde bus. �I've probably got something like 70%
> distilled water and 30% coolant in there at the moment (given that it's
hard
> to flush ALL the coolant out). �I can't drain and refill with a 50/50 mix
> until the weekend. �But I live in Michigan and it's getting COLD!
�Supposed
> to get down to 20 degrees F on Friday morning. �Am I doomed? �Will the
> water/coolant in the van freeze and cause damage? Or will it just get
slushy
> and I'll be o.k. until Saturday? �I tested the coolant and the floaty
balls
> tell me I'm good until 20 degrees F.
>
> I found this info and chart from the Alaska Science Forum to be kind of
> neat. �Apparently, higher coolant mixes don't necessarily mean better
> protection:
>
> http://www.gi.alaska.edu/ScienceForum/ASF6/680.html
>
> thanks for you thoughts!
>
> --
> Mark
> 1990 Westy (2.1 - manual)
>

Coolant is cheap.  Engines are expensive.  Drain some of your mix and
add pure coolant until you are satisfied with the protection level.

-- 
Michael Snow
1987 Syncro TiiCo
1982 Westfalia 1.9TD
http://slowmachine82.blogspot.com/