Save yerself the time, money and aggravation and just go to the dealer for
the correct O- Ring.  I did and they're cheep enough so I bought several to
stash in my tool box.

861 819 297, around $3 each.

My local dealer actually had them on their shelf as they do a lot of heater
core repairs.
--
Jim Thompson
84 GL 1.9 "Gloria"
84 Westfalia 2.1 "Ole Putt"
72 411 Station Wagon "Pug"
oldvolkshome@gmail.com
http://www.oldvolkshome.com
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On Tue, Dec 1, 2009 at 4:45 PM, Robert Keezer <warmerwagen@yahoo.com> wrote:

> 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