Both the front & rear cores in my '88 need changing. At least I'm assuming so,
since I can't immagine a hose leak etc..creating such a volume of loly-pop
smell. I'm part way through removal of dash. any tips? I bought my  vanagon
with 100k on him, is the heater core problem common, and is it related to the
phosfate free antifreeze usage? secondly, I am considering just temporarily
by-passing the rear heater core (never use it) with a short piece of pipe.
does anyone think it would be smart to take advantage of this bypass, and add
a flushing tee here for easy access? thanks for any advice.