A sticky stem - advice needed!

[Emperor Zurg]

I know of a couple penetrants (Kroil being the best one) that would most likely free it up but the trouble is you wouldn't want to smoke the pipe afterwords. Ever.

I would loose my patience with something like this pretty quickly. If the pipe is to be a smoker, then it needs to come apart. Period. It needs to be cleaned and probably needs the stinger removed too. (I hate them things) A pipe that can't be cleaned is worthless as a smoker (to me anyway) and the way I figure, it's impossible to ruin a turd. Therefore, at some point, I'd make up a couple of soft jaws to hold and support the shank and stem as firmly as possible and just wrench the bastard apart and let the chips fall where they may. If it shatters, it goes in the trash; if it comes apart, we move ahead from there. Either way the roadblock is gone.