Thanks Dennis. I have a spare pressure cap I can swap in. How do you know if it's functioning properly?

I store my van for the winter in an unheated garage while the temp gets to -30. Seems like every year it loses coolant while stored and I never see evidence of it. I rarely add coolant during summer operation. 

It is a fairly new rad. 

Jeff

Sent from my iPhone

> On May 30, 2016, at 10:19 PM, Dennis Haynes <d23haynes57@hotmail.com> wrote:
> 
> 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