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Originally Posted by Fuzzball
Sarafin, I haven't figured that out yet. I'm trying to do all the easy things before I get too deep into the engine. All that talk about runaway diesel scared the stuffing out of me ! 
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The CCV air/oil seperator that comes on the US '83 240D (and maybe other US & non US models) and seperates the oil from the blow-by gasses is a real nifty little device and does help eliminate the possiablity of engine oil fired runaway. It may not help if you blow a hole in a piston or break a ring, but it will prevent the problem from excessive blow-by or accidential over fill of oil.
I have wondered in the past when looking at various 300's NA & Turboed why they didn't have the same setup as my 240D. The oil/air seperator on my car is about 4.5" wide and about 7" deep and plumbed back to oil sump. It was a great idea, but they made the lower connection rather poorly. A short tube type connector coming up from sump is over lapped by the pipe coming down from seperator and sealed with an "O" ring.

Needless to say these systems are always "marking their spot" as old Harley's & VW's do.

I removed the metal tubing from mine and replaced it with plastic tubing and clamps. Now the only thing leaking is the steering box.

"One thing at a time" is my moto these days.