Date:         Tue, 4 Nov 2003 09:40:16 -0800
Reply-To:     gary hradek <hradek@YAHOO.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         gary hradek <hradek@YAHOO.COM>
Subject:      freshly dissolved oxygen
Comments: cc: dhaynes@OPTONLINE.NET
Content-Type: text/plain; charset=us-ascii

Dennis,
       If anyone believes this you can boil your water
before adding it or put negative pressure.   Either
way will remove the fresh oxygen.
               gary
---Date:    Mon, 3 Nov 2003 18:39:36 -0500
From:    Dennis Haynes <dhaynes@OPTONLINE.NET>
Subject: Re: Coolant loss mystery

One of the worst things for a cooling system is the
regular topping off
of coolant. Every time you add coolant, you are also
adding water with
freshly dissolved oxygen. Corrosion, here it comes. It
is important for
the system to be tight.

The cooling system should not be opened or bleed with
a warm engine.
Water even with Antifreeze will vaporize as law as 140
or so. As soon
as
the system is opened, the vapor will make bleeding
difficult as you now
some steam. In addition, since the heads have areas
that get hooter
than
the coolant, the loss of pressure will cause some
"flashing" which will
cause uneven cooling and possible head warping, seal
damage. I have
also
found there is no benefit to raising the front. In
fact it makes it
harder for the water pump to push the coolant up hill.

As for the perplexing tale, make sure the pressure cap
is working
properly and have a leak down test performed to make
sure coolant is
not
leaking into the cylinders or combustion gasses
pushing the coolant out
while driving.

Dennis


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