If you seal the separator, how does the blowby gas get out? I assume there is some gas that carries the oil vapors, which needs to get sucked back into the engine, not forced through the separator into the oil pan...

What am I missing?

Thanks!

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Current Diesels:
1981 240D (73K)
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Past Diesels:
1983 300D (228K), 1985 300D (233K), 1993 300D 2.5T (338k), 1993 300SD (291k)