searched the archives and found about 400 posts on this subject.  Not having
the time to wade through all of them (at least I'm being honest!), I thought
I'd pose the question for a quick answer:

Last weekend I pulled my rear heater core (very easy) and found that there
was a small dried puddle of coolant under it.  There was also a little
wetness and white residue around the area where valve is located on the left
side of the core (where the inlet hose mounts).  The Bentley diagram does
not cover this model rear heater (at least the picture in the Bentley looked
nothing like my unit), so I'm wondering about the internals.

Is the typical source of this leak an o-ring inside that valve body where it
mates to the heater core?  If so, is it possible to change it without
introducing a bunch of air into the cooling system?  (i.e. use vise grips in
the heater hoses and bleed the heater core when done).

Thanks

Brent Christensen
'89 GL Syncro Westy
Santa Barbara, CA

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