Hey what quick and great responses to my puzzler. Some progress has been
Made!  The findings lead me to knew questions.

With complete skepticism I took the cover off my back heat exchanger and
found wetness under it!  I guess that explains the coolant smell from the
back heater.  This never came from the front.  only from the back when the
fan was on.  Could this be flowing way back?  Is it necessary to replace
the whole unit?  Now I'm wondering if I'm leaking from two areas?

Keep the tips coming I am making some progress.

Eric

Eric and Peggy
84 Westfalia, Wolfsburgh, GL
Ithaca, NY