Volks,
Since I purchased my '85 every time I turned on the rear heater out came
heat but also a sickening sweet smell.  I never noticed a coolant leak
but replacing the core was on my list of things to do.  Last night I got
around to it, very easy process.  I thought that I would report that
some times that sweet syrup smell really is syrup.  Did I mention my van
is a Westy. I don't know how it spilled in there but after wiping out
the inside of the housing the smell is gone.
Stephen DeMocko
('85 Westy Luci)