I will make a comment as this thread relates to the current one on VW parts
quality. I recently went into a shop to buy one of these blue caps, they
were always bad enough anyway� but it seemed that every one of the Meyle
replacements I picked up off the shelf I could blow through both ways no
problem. The mechanic I was buying the parts from thought I was crazy
blowing through these caps, and when I tried to explain to him what I was
doing I could tell he really didn't understand how the vanagon cooling
system workes.

But here's my real question: would it be possible to buy some kind of
one-way valve that kept pressure inside the system but sucked coolant from
the "overflow" tank during cooldown, as the blue cap is designed to do, but
just spliced into the hose between the cap and the overflow tank?

It sure would make life a lot simpler in a world of crappy parts.

Jim

On Sun, Aug 25, 2013 at 4:05 PM, John Meeks <vanagon@gmail.com> wrote:

> Thanks Dennis. I fixed the symptom when I found a weak spring clamp at the
> coolant distribution tower. Now I can fix the cause.
>
> Every week or so the Vanagon would burp out a cup or two of coolant, no
> dripping otherwise. I'm guessing that the cap occasionally failed to open
> to the overflow tank.
>
> Thanks again for your reply.
>
> John Meeks
> '91 Multivan
> Stock 2.1 250k miles
>
> http://www.vanagonauts.com
> Vanagon Rescue Squad
> iPhone and Android apps
> On Aug 24, 2013 8:17 PM, "Dennis Haynes" <d23haynes57@hotmail.com> wrote:
>
> > Both should work! The 2 valve units seem to be common replacements.
> >
> > Dennis
> >
> >
> > -----Original Message-----
> > From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf
> Of
> > John Meeks
> > Sent: Saturday, August 24, 2013 6:37 PM
> > To: vanagon@GERRY.VANAGON.COM
> > Subject: Blue pressure cap, 1 valve or 2?
> >
> > 2.1 wbx. Cap that's on there now has one valve in the center. I picked
> up a
> > spare from a local mechanic and it has two. Anyone know if both are good?
> >
> > No part number but 'made in Germany'.  Thanks!
> >
> >
>