After cleaning my intake and valve cover, i plugged the EGR and the breather intake near the turbo and got a long pipe to vent the breather to atmosphere like an 18wheeler truck. Its very clean now.

How much oil comes out of the valve cover breather?

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1987 300TD 147,000 miles- Palomino leather interior, 1995 facelift and body cladding, E350 wheels, Rebuilt suspension and sport springs, rebuilt turbo, New Monarch injection pump and injectors....and the list goes on and on...

I looked into doing the oil separator myself but was cautioned because apparently it was done on purpose to help lubricate the turbo. Not sure if this is correct but I heard it from some reliable sources.

I recently replaced my Ventilation hose with a rubber elbow from Discount Auto, a couple double sided barbed fittings, and some clear hose. It stays fairly oily but there is no way to tell how much is flowing through there.

I think you just need to replace the gasket and at the same time, clean the manifold and crossover tube out. I pulled my crossover and scraped all sorts of gunk out of it. The cylinder/funnel the is on the passengers side had a lot of buildup. It was maybe 20% restricted. I cleaned it out but never noticed much improvement if any so I doubt is an issue. This was at 175k and the EGR was bypassed around 160k.

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1987 300TDT - 195,000 (Original #14 head)
1993 190E 2.3 - 105,000
1981 300D - 250,000