Basically any O ring that is about the size would do, I guess.  The real one
is flat.  I have reinstalled one before with Right Stuff, $15, and it is
holding well for years.  Right Stuff is a real saver.
Zoltan

----- Original Message -----
From: "Robert Keezer" <warmerwagen@YAHOO.COM>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Tuesday, December 01, 2009 4:45 PM
Subject: Rear heater core valve o-ring source?

Hi- is there a vendor who sells a rear heater core valve o-ring ?
My heater core is fine, just that it leaks at the o-ring. The o-ring is old.
What are the tricks to fix? A $4.00 tube of silicone sealant or a $2.00
o-ring? Or a $3.00 o-ring? Or a .99 cent o-ring with 10.00 S&H? Just kidding
on the last one.
It looks like a special o-ring, or is this just the way it looks, with a
groove on one side, after many years?

thanks
Robert
1982 Westfalia