Date:         Tue, 27 Apr 2004 09:01:59 -0700
Reply-To:     gary hradek <hradek@YAHOO.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         gary hradek <hradek@YAHOO.COM>
Subject:      why you're seeing a difference in temperature
Content-Type: text/plain; charset=us-ascii

Larry,
     While running the van with the front bleeder
valve off and coolant in the system it was easy to add
water and keep up with the loss from the bleeder hole.
With water alone the flow rate and loss of water was
scarey and very fast.   The viscosity of water  is was
makes this happen.   Glycol is a thicker like sugar,
higher viscosity means more friction.  Much slower,
much much slower.  gary


Date:    Mon, 26 Apr 2004 20:05:57 -0700
From:    gary hradek <hradek@YAHOO.COM>
Subject: Re: coolant system trivia

Larry,
      I am suggesting a lower gycol level for the
summer only with perhaps some additives.
This is why I call it trivia.
              regards gary
--- Larry Alofs <lalofs@rcn.com> wrote:
>
> Water is a better coolant than most any other liquid
> because
> of its high specific heat; it absorbs a lot of heat
> energy for
> a given increase in its temperature.  Pure water
> would be the
> best coolant, but of course it provides no corrosion
> resistance and it would tend to boil at the
> temperature that
> your engine should run at for good efficiency.  When
> you mix
> in antifreeze you sacrifice some of the cooling
> ability.  This
> is why you're seeing a difference in temperature,
> not because
> of a change in circulation rate.
>   BTW that IR thermometer from Radio Shack is "a
> good thing".
>
> Larry A.





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