I removed my rear heater core and pressure tested it for leaks.  Found
none in the core itself but the O-ring between the valve and the core
was leaking.  Replaced that, and cleaned everything.

I'm still getting some anti-freeze odor from the rear heater when it's
on.  Thinking it's perhaps in the carpet in that area and being drawn
into the airstream.  I did clean the carpet with a extraction-type
cleaner but would imagine that it would be pretty difficult to totally
remove all traces of old coolant that may have soaked in over the years.

Allan
--
1991 Vanagon GL.