Date:         Wed, 23 Dec 2009 20:41:26 -0800
Reply-To:     Luke Bakken <luke.bakken@GMAIL.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Luke Bakken <luke.bakken@GMAIL.COM>
Subject:      Re: Expansion tank pressure cap - how tight?
In-Reply-To:  <6acc6ca40912232040s5004dd06ve0f7e96be3146d76@mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1

On Wed, Dec 23, 2009 at 7:34 PM, Don Hanson <dhanson928@gmail.com> wrote:
> Hope!  If indeed it is just a leaky/loose cap, you will be lucky.
>   Your description seems to say...head gasket .
>    Have you thought about that?  It matches all the indicators for a leaking
> head..
> too....

Actually I don't think it does - if I have researched correctly, a
leaky head gasket would fill the expansion (i.e. pressurized) tank
with gases and force coolant into the overflow (i.e. non-pressurized)
tank. I am not seeing this - the expansion (pressurized) tank has
absolutely no air or bubbles in it after a drive, ever. The fact that
the system appears to suck air into the expansion tank indicates a
leak somewhere around the tank, or maybe I'm not tightening the
pressure cap enough.