Can someone tell me how the crankcase ventilation works on a 1987 300 SDL. The reason I am asking is that I allways see oil around and outside of the filler cap. The gasket looks good, but still loosing oil. Suggestions and comments welcome.

I have looked and searched, but cannot find answer. Experts please read and respond. Thanks for your help. Jack

The breather stuff is within the valve cover... then the tube runs to the turbocharger intake boot. Pretty simple.

You need to replace the gasket on the filler cap. Looks are deceptive.

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I'm not a doctor, but I'll have a look.

'85 300SD 245k
'87 300SDL 251k
'90 300SEL 326k

Six others from BMW, GM, and Ford.

Liberty will not descend to a people; a people must raise themselves to liberty.[/IMG]

How much pressure should be on the valve cover cap if I remove it while the engine is running? Can someone give me an idea?

you should be able to take the cap on and off without fear of it blowing out of your fingers.
Report back on this. You may have blowby.
DDH

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'95 E320 Wagon my favorite road car. '99 E300D wolf in sheeps body, '87 300D Sportline suspension, '79 300TD w/ 617.952 engine at 367,750 and counting!

Isn't the pinhole along the valve cover aft of the crossover pipe part of the PCV system?

Sixto
87 300D