Hello all,
Thanks for all of the advice. OK here's the update:
exhaust smells like exhaus, not coolant, maybe faintly of diesel.

I cleaned the EGR with WD-40, didn't seem to do too much.
I tried the teakettle test: with the breather hose attached, the oil cap bounced a little bit, and no colored smoke (of any color) came out of the oil cap. With the hose off, when I plugged the intake, had the same result, cap bounced a little, no smoke, engine did not shut off when plugged.

Now, I am looking, when I rev it up to ~3k rpm I get a burst of real black/brown smoke, otherwise at low RPM it is a light grey smoke, and not too, too much of that, but enough, if you know what I mean.

I cleaned out the banjo bolt on the ALDA, it wasn't too bad, this didn't seem to have a big effect either.


So here's what I have next up:
a Diesel Purge treatment
Breather hose replacement
a valve adjustment

Sound reasonable? Any comments/new ideas from the symptoms here?
Looking forward to your sage advice,
Jim