Matthew, as I understand it, the culprit is the rubber seal (GoWesty
carries it) that fits in the on/off valve, unless it is the core
itself, of course. I've never done this as I have always replaced the
entire core with one from some stripping project. The fruits of my
addiction, you might say. Doesn't appear to be a difficult job.
Like Bob, I would send you one, but both of the ones I have available
are leaking at the valve, as evidenced by seepage in that area.
Miguel

On Mon, Aug 24, 2009 at 10:53 PM, Bob Stevens<mtbiker62@gmail.com> wrote:
> Matt,
> I have a rear heater that came out of my '87 Syncro Westy that you can have.
> You would need to find out if it is the same as the one in your bench for
> your '84.
> BD lists only "heater core" 867819121A for both the '84 and '87. But that
> may
> be the front. It's the one for $91.12. Maybe contact Ron at BD and as, then
> get back
> to me and if they're the same I'll ship this to you.
>
> bob
>
> On Mon, Aug 24, 2009 at 10:38 PM, Matthew Snook <matt@snooksband.com> wrote:
>
>> Tomorrow I'll pull the blown rear heater out of my '84 Westy (1.9
>> Wasserboxer).  Does anyone have advice on which part is most likely the
>> leaking culprit?  I'll start my investigation there...
>>
>> Also, I will need to buy those parts.  Anybody got a used one for sale that
>> works perfectly?  Or a suggestion on which parts place to try?  Also if it
>> is the core or a valve, which peripheral parts should I throw in?  Do any
>> of
>> those rear heater parts go out often enough that I should get an extra to
>> throw in the parts bucket?
>>
>> Thanks,
>>
>> Matt
>>
>

-- 
Miguel