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.