If you replace the stock breather with an air filter going straight into the turbo, where does the breather tube out of the top of the valve cover port to? If you send it straight to the oil pan it would pressurize the case wouldn't it.

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I LOVE CATS....AND FRIES

1981 300sd
1983 300sd
1985 300d
1983 300cd
1991 350sdl

Crankcase is already pressurized enough.

In the old days it was vented to atmosphere.

No matter what kind of intake you should be able to pipe it into some of the intake plumbing.

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Jim

I think you'll be challenged to find a better-than-stock air filter setup, why mess with a good thing? Need the space for sumpin else?

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Cheers!
Scott McPhee

1987 300D

3 of cars have trampoline springs to dampen the vibration to keep the breather rattling and from breaking the breather bracket AGAIN. I just want to simplify things a bit on a couple of my cars.

Another question: I blocked off my EGR valve an checked my boost. Its 9 psi at WOT. I am happy with the power, but if I leave the fuel alone and increase boost via the waste gate will it increase my fuel economy at all?

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I LOVE CATS....AND FRIES

1981 300sd
1983 300sd
1985 300d
1983 300cd
1991 350sdl

You need a oil vapor separator unit- it takes the "pressure" (pressurized oil vapor and air) and converts the oil vapor to oil and allows it to drain back into the crankcase and the air gets sucked into the air intake. However the air and oil vapor are never 100% separated so some oil ends up coating the intake. I've plumbed mine via a stand alone 240D oil sep unit to the crankcase for the oil and then the "air" feeds into a vented catch can filled with fishing line. The fishing line creates surface area for the remaining oil vapor to cling to, and then less of it is vented to the atmosphere. I don't wish for my intake to be gunked up.

MTUpower, your intake won`t get gunked up with the oil vapor, it will if your EGR is working. then the soot mixed with the oil puts that nice slimy coating.

The 78 - 79 300SD W116 (not sure about the 80) ran the oil vapor line directly into the Turbo air intake "U" Tube.

Charlie

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there were three HP ratings on the OM616...

1) Not much power
2) Even less power
3) Not nearly enough power!! 240D w/auto

Anyone that thinks a 240D is slow drives too fast.

80 240D Naturally Exasperated, 4-Spd 388k DD 150mph spedo 3:58 Diff

We are advised to NOT judge ALL Muslims by the actions of a few lunatics, but we are encouraged to judge ALL gun owners by the actions of a few lunatics. Funny how that works

i woldnt put a filter directly on the turbo unless you isolated it from the underhood heat. sucking up that heat is bad for the maf sensor and horsepower.

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1993 e300
1995 e320
1994 e320
2006 s500 4matic
2004 Jeep wj overland
2001 Ducati 748
2004 Honda shadow aero

What Charlie said. block off EGR. Then install the filter of your choice. get a oil separator from a 240d (not sure the year) it can bolt to the fender if you want. then plumb the oil back into the pan, and the vent into the intake tube.

If you wanted to have a super clean looking install. get the manifolds from a 78-79 300SD. they don't have EGR at all... no one will know its blocked off if its completely gone

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maf sensor

what is this crazy technobabel

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maf..... oh that must be somptin those new high tech cars have after 85


The 82 - 83 240D have the seperate oil seperator.

Charlie

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there were three HP ratings on the OM616...

1) Not much power
2) Even less power
3) Not nearly enough power!! 240D w/auto

Anyone that thinks a 240D is slow drives too fast.

80 240D Naturally Exasperated, 4-Spd 388k DD 150mph spedo 3:58 Diff

We are advised to NOT judge ALL Muslims by the actions of a few lunatics, but we are encouraged to judge ALL gun owners by the actions of a few lunatics. Funny how that works

Nahhh, it's gotta be a gasser thing... none of my 87's have one

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!

Definately use the oil seperator, it will cut down on oil consumption, and maybe save it from an untimely death if anything happens to cause much oil, or mist to form under the valve cover, which if sufficient in volume would result in a runaway engine..

Point of note for those not familiar....the 78 and 79 300SD had no oil seperator at all.

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Proud owner of ....
1971 280SE W108
1979 300SD W116
1983 300D W123
1975 Ironhead Sportster chopper
1987 GMC 3/4 ton 4X4 Diesel
1989 Honda Civic (Heavily modified)
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Section 609 MVAC Certified
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"He who fights with monsters might take care lest he thereby become a monster. And if you gaze for long into an abyss, the abyss gazes also into you." - Friedrich Nietzsche