One of our ground power units' (big perkins diesel) air filter was SO clogged that the corrugated rubber hose between it and the turbo imploded absolutely flat while running. The engine was still able to do the job, though it gave a good puff of smoke when you put a sudden load on it!
A picture of that Lincoln part would be nice, sounds like what I was considering making. Was there a check valve in the drain line to oil pan?