Wait...the 603's don't have an oil separator on the crankcase ventilation setup?

My 617 at least pretends to have an oil separator in the air cleaner assembly.

Also, is all of that crud from the crankcase ventilation or the EGR valve?

I'm starting to think it'd be worthwhile to pull and clean up my intake manifold...

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2001 VW Jetta TDI, 5 speed, daily driver
1991 Ford F-350, work in progress
1984 Ford F-250 4x4, 6.9l turbo diesel, 5 speed manual
Previous oilburners: 1980 IH Scout, 1984 E-350, 1985 M-B 300D, 1979 M-B 300SD, 1983 M-B 300D
Spark-free since 1999