Thanks. I am thinking it may be a mixture of not being bled correctly,
and the expansion tank cap not being tight enough. I went to add coolant
yesterday and the cap  came off quite easy. I noted the position of the
cap before I removed it, and upon installation it easily turned past
that point. Do these caps have a torque value. I looked in my Bentley,
but couldn't find anything on it.

I used a procedure that Joel recommended, but it did not reveal
anything.

Anyway, I am going to drive it for a while keeping a close eye on the
coolant level. If it stays constant then I will assume that this was my
problem, and proceed with bleeding the system.
--
Chip Shaner
4 kids and 1 cookin'.......
http://www.fament.com/chip/vw/vw.html  - The Un-named VW page