i am interested in having a discussion about different types of cooling
systems.  specifically the design benefits and difference between the
types of cooling systems in other vw's and the type of cooling system in
the vanagon.  for point comparison we could use the 85-92 golf.  that
system has a expansion bottle with air in it, the air is at the highest
point in the system and it the system operates fine.  where as in our
vanagons we have a completely filled system with no air.  what is the
technical problem with having a little air at the highest point in the
system or in an expansion bottle.

if there is a technical name for systems with air and systems without air
i would be interested in what they are called.

jonathan