240D seperator works a little better then 300D's, but not much. I was raised up in my parents trucks stop and I have seen 2 runaways as a kid, (one puked its guts) and there have been any number of VW's & MB's that have runaway engine's when turbo oil seals fail and the think sucks oil direct into intake. We had a runaway DD generator on ship I was on caused by oil seal failure on turbo. A friend had a MB 300SD runaway in his shop as I walked it the shop one day, the only thing he figured that caused it was leaking seals & rings. (he was trained by MB in Germany at factory) He had changed oil & filter along with fuel filters. CO2 was the stopper on the engine and no engine damage. Matter of fact I saw the same car today still running fine 4 years later.
On all diesel engines & gas engines the CC is vented to somewhere, and if you seal off that vent it will look to vent somewhere else as back pressure builds. It will blow oil out dipsticks, past weak oil seals or rings and one way or the other you will be sorry sooner or later. My brother-in-law took off the CCV on his new '68 GTO and got about 2 miles down the road and romped it and blew out most of his oil out through the dipstick tube. The dipstick dented the hood on the car, I got a good laugh from that one. Dented hood & motor guts on the pavement. This was 1968 in Santa Anna, CA by the way.
