Does anyone know where the oil drain tube for the crankcase vent goes on a 300D? i bought an aftermarket intake for my 300SD and it doesn't have that tube so i need to retrofit something...I don't remember the tube going into the oil pan on my old 300D. now i just have 2 open hoses and i am losing oil through both of them. i also need to make a fitting for the elbow of the intake for the blowby vent.

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• 1993 Mercedes-Benz 400E *146,000 Miles*
• 1985 Mercedes-Benz 300SD Turbo Diesel Biodiesel *SOLD @ 346,000 Miles*
• 1984 Mercedes-Benz 300D Turbo Diesel Biodiesel *SOLD @ 284,000 Miles*

Probably not the answer you're looking for, but I don't take it as a good sign of part quality when the aftermarket kit doesn't have provisions for allowing the normal operation of something important such as the crankcase vent system.

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'81 MB 300SD, '82 MB 300D Turbo (sold/RIP), '04 Lincoln Town Car Ultimate

Sooner or later every car falls apart, ours does it later!
-German Narrator in a MB Promotion Film about the then brand new W123.

The tube on a turbo 300D is located near the Air cleaner housing bracket. Snakes down to the oil pan near the turbo oil line. Now a 300D/SD '85 turbo Cali version, there is no tube.

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1983 123.133 California
- GreaseCar Veg System

I vent mine to the ground behind firewall.I don't want that greasy air in my turbo.

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1999 w140, quit voting to old, and to old to fight, a god damned veteran

i do have the cali version. i have had the pan off on a 300D before and i don't remember the tube actually feeding into it. i didnt wanna vent mine into the turbo either but i am tired of smellin blowby it is the worst thing to breath. it is actually a good setup its just not made for the cali version.

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• 1993 Mercedes-Benz 400E *146,000 Miles*
• 1985 Mercedes-Benz 300SD Turbo Diesel Biodiesel *SOLD @ 346,000 Miles*
• 1984 Mercedes-Benz 300D Turbo Diesel Biodiesel *SOLD @ 284,000 Miles*

Not very nice to the pavement, the earth or anything that lives on it. Not a big hassle to make/install a oil vapor sep unit.

I use a seperator to catch 90% of oil.Its the smelly greasy gases I don't want.

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1999 w140, quit voting to old, and to old to fight, a god damned veteran

So you ARE nice to the pavement...

I'd like to weld me up a larger one.I cut mine out of stock air cleaner.Really not the best.

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1999 w140, quit voting to old, and to old to fight, a god damned veteran

so the question is if i make a fitting in the side of my oil pan for a drain tube will it work? the problem i can see is if there is a positive pressure and oil gets pushed up the drain tube. i know the stock tube goes into the top of the casting that the drain pan is mounted to.

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• 1993 Mercedes-Benz 400E *146,000 Miles*
• 1985 Mercedes-Benz 300SD Turbo Diesel Biodiesel *SOLD @ 346,000 Miles*
• 1984 Mercedes-Benz 300D Turbo Diesel Biodiesel *SOLD @ 284,000 Miles*

Your right. That is why the stock oil separator setup has check valve. You can still make a fitting on the side of the oil pan, in addition installing a check valve to prevent oil from pushing up.

But the question I have is.. Why the change? The '85 Cali setup flows very good already. It would be hard to make it better, even with aftermarket stuff.

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1983 123.133 California
- GreaseCar Veg System

because there has to be somewhere for the oil to go.

__________________

• 1993 Mercedes-Benz 400E *146,000 Miles*
• 1985 Mercedes-Benz 300SD Turbo Diesel Biodiesel *SOLD @ 346,000 Miles*
• 1984 Mercedes-Benz 300D Turbo Diesel Biodiesel *SOLD @ 284,000 Miles*