In my quest to troubleshoot excessive oil consumption (1 qt every 500-600 miles) here on the forum, I keep running across discussion of an "oil separator". My '81 240D has a hard plastic pipe that runs from the valve cover directly to the intake manifold. Nothing else is attached.

A couple of others in various threads seem to have something similar, but most seem to have some type of separator that magically cools down the vapor to extract some oil.

I'm still trying to find a good manual for the car as the ones I purchased off of eBay appear to be pirated copies and won't even install.

My 83 240D has an oil separator, but it is my understanding that some of the earlier cars do not. Someone with an 81 will know.

MB USA sells the non pirated CD's for $20 plus shipping/handling.

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RRGrassi


70's Southern Pacific #5608 Fairmont A-4 MOW car

13 VW JSW 2.0 TDI 193K, Tuned with DPF and EGR Delete.

99 W210 E300 TD Turbo, chipped. Still needs EGR Delete, 228K

90 Dodge D250 5.9 Cummins/5 speed. 400K

My 79 116 turbo lacks an oil separator. The vent line feeds directly into the intake plastic U tube from filter to turbo. I believe your 240d setup is OE for early models.

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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13