I was looking at wikipedia and noticed an interesting photo in the OM617 entry.

http://upload.wikimedia.org/wikipedia/en/3/3f/300SD_OM617.jpg

Look closely...

The air filter mod is pretty cool, I have seen it before and considered doing it myself, but I am not exactly sure how to re-route the crank case ventalaton. Any one know how it's done, or have a link to a good tutorial or photos?

The Vaccum Modulators on the top of the camshaft cover are missing. Would that mean this SD has a manual trans?

Also, there is a strange brass fitting (bottom right) in between the clear tube coming off the back of the intake manifold, and the clear tube going to the pump. What is that all about? I cleaned the bolt that holds the banjo onto the back of the intake on my car and it really helped performance, but I never thought to do anything with that module that the clear tube connects to and it look like he replaced his. Any ideas?

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1987 250D
1984 300TD
1983 300D
2002 Chevy 2500HD Diesel
1995 Dodge 12 valve Cummins Dually
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