I'm guessing you've got combustion gasses in the system.  Not a good thing
from my own personal experience.

Donald Baxter
'85 GL
Iowa City, IA

----- Original Message -----
From: "MICHAEL POPE" <raskayamon@MSN.COM>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Saturday, December 27, 2003 8:24 AM
Subject: Coolant Overflowing!

Hey now volks,

Well I have been battling some drips on my main rad pipes for a couple of
weeks, seems like I have it temp fixed by adding a couple of more clamps(
till I can afford to replace the pipes) has been dry for at least a week.
anyway I have been having a hard time getting all of the air out of the
system( using Boston Bob method) I can see the air in the small plastic
pipes in engine compartment. When I drive on hwy overflow tank eventually
fills up and spits coolant everywhere (the van is not overheating I can
drive for long periods and it will not overheat just puke coolant). Going to
take it in for pressure and leak down as soon as I can. Had combustion
gasses in system when I bought van/ new heads 10,000 miles ago. Is this same
problem or am I just not getting all the air out as a lot probably got in
with those pipes leaking for almost a month off and on? Thanks for the help.

Michael
89 Westy-Rosebud