The gurgling is a sign that the fluid is being exposed to something hot
enough that the vapor pressure in the cooling system is not sufficient to
keep the coolant from boiling. Most likely the coolant is flashing off in
the engine and doing some damage along the way. Get the system topped off
and check the pressure cap for proper operation. Do you know where the
coolant is leaking? It is not normal for the level to drop.

Dennis

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
Jeff Palmer
Sent: Monday, May 30, 2016 11:05 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Gurgling rad?

Hi everyone - my coolant level dropped a bit over the winter (which happens
every year).  I noticed today after a 30 minute drive that when i shut the
motor off the rad gurgled.  Is that an air bubble that needs to be bled?

Thanks
Jeff
85 Westfalia auto with 2.1