Date:         Thu, 21 Mar 2002 12:25:16 -0600
Reply-To:     Stan Wilder <wilden1@JUNO.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Stan Wilder <wilden1@JUNO.COM>
Subject:      Re: bubbles in coolant
Comments: To: wnsopc3@3RDM.NET
Content-Type: text/plain; charset=us-ascii

I've followed these antifreeze post for about a year. I don't have a
Water Cooled Vanagon.
I had an 83 Cadillac with an aluminum bock and aluminum heads, cast in
iron sleeves. As part of a recall Cadillac installed a new camshaft in
the engine when the vehicle had over 100K on it.
I ventured back into the prohibited shop area just to get a look and a
report on the progress of the camshaft installation.
The aluminum block and heads looked very good in the water cooling
jackets. We had always just used Prestone antifreeze. The inside of the
aluminum water pump also looked very good and exhibited no corrosion or
even discoloration.
There may be two completely different allows in the aluminum castings but
I know that Prestone and some other brands are manufactured with minute
particles of inert ingredients there to seal tiny pin holes in radiators,
the cooling system pressure sets them and apparently they stay there
until the system is vigorously flushed.
Part of the Prestone formulae is water pump lubricant.
Our mix was always 50/50% which calculated on volume was -30 degreesF.

Stan Wilder
83 Air Cooled Westfalia


On Thu, 21 Mar 2002 12:48:22 -0500 Walt Spak <wnsopc3@3RDM.NET> writes:
> Malcolm,
>
> I have had the same experience with orange anti freeze and have gone
> back to
> the green as well.  I have had heads off of quite a few Vanagons and
> have
> never seen any damage where the anti freeze touches the head no
> matter what
> color it was.  I believe the head corrosion is caused by
> condensation
> forming between the rubber head gasket & the head.  It forms, it
> sits there,
> and it corrodes.  Some engines do not display much corrosion if any.
>  Maybe
> because they were always used for long journeys that caused the
> engine heat
> to dissipate the condensation.
>
> Walt Spak
> Pittsburgh PA
> wnsopc3@3rdm.net
>
> ----- Original Message -----
> From: "Malcolm Stebbins" <Malcolm.Stebbins@MSVU.CA>
> To: <vanagon@GERRY.VANAGON.COM>
> Sent: Thursday, March 21, 2002 10:22 AM
> Subject: Re: bubbles in coolant
>
>
> | This may sound  goofy, but with Green coolant I have NO leaks,
> with the VW
> orange
> | coolant, I get seepage at most joints and even around the head
> gaskets.
> So I
> | switched back to Green coolant and I change it every year.  Try
> that?????
> |
> | You say that:  "I took the cap off and could see the air bubbles
> coming
> through out
> | the hose up the tank at idle."   I do not see BUBBLES, just see
> coolant
> streaming in
> | the (left) expansion/reservoir tank.  m2cw  Malcolm
>

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