thanks again for the insight..I wish I had done this job when I changed the pan a few weeks back...oh well...it is a PROJECT car..LOL

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-SpecialDelivery
1985 300CD Silver/Blue H&R Suspension (Sold, still cryin over that)
1982 300SD Silver/Blue '85 OM617 (Sold)
1982 300D - Blue/Blue (Sold)

Since the replacement valve is no longer available as a stand alone product , are there cleaning agents could be used to prolong the life of the valve?

Hammerwerfer

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1985 300DT 241,000 miles
1979 300SD 202,000 miles

I most often use spray carburetor or brake cleaner.

If the valve is removed, I have used kerosene, diesel, and many other chemicals.


.

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1985 300SD
1983 300D
1984 190D
2003 Volvo V70
2002 Honda Civic

https://www.boldegoist.com/

Do all 617 equipped with this check valve? I have 85 300D turbo, Californian version. I couldn't find any check valve in there, after opening the oil pan. Unlike in Dave's picture(#12), it's just an empty hole. It wasn't in the oil pan and it wasn't on the ground either.
Thanks

The 85 kali kar does not have the drain tube going into the upper pan. the 85 Federal version does have this drain tube and Check valve.

Your 85 has the Air Filter behind the R/F Headlight. all the other Turbo W123`s 82 - 84 and 85 Fed have this drain tube.

If you notice the tube from the Valve Cover to the Air Filter has a piece 1/2 way in between that splits off to the air intake to the Turbo. this gives it the suction it needs to pull the blow-by gasses out of the engine. some get into the air filter housing and make a mess in the bottom of the housing.

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

Thank you Charlie. That's the 1st difference I've learned among 617 engines.

T.T.T. .

I just discovered this thread 3.8.2019, thanx fellas .

FWIW, the fiber discs in these check valves don't like carby/brake cleaners, better to use Rollgay's SAMS CLUB de greaser or 'AWSOME" products instead .

? Are Dave & Shell (?) still here and driving old Mercedes' ? .

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-Nate
1982 240D 408,XXX miles
Ignorance is the mother of suspicion and fear is the father

I did then what I knew how to do ~ now that I know better I do better

Thanks for finding this old thread. I thought that drain tube has a check-valve since I felt it pop open when I blew slightly on the drain tube (via a rubber hose). I wonder if essential. If minimal blow-by, there shouldn't be high air velocity and resulting pressure drop in the PCV tube, so oil mist that is captured into drops on the tube walls should run down into the pan under gravity. It seems the factory design allows build-up of oil in that tube when running, then when the engine is off, the valve will pop open under enough liquid oil "head" to drain down.

My 1985 CA 300D engine has a unique design. There is no oil separator, just a rubber Y which lets oil drops/mist flow directly into the turbo inlet duct. That gunks the compressor wheel. There is no port for an oil drain on the upper oil pan. My 1985 now has an earlier engine, but I kept the frame-mounted air filter (no oil separator). I ran that tube from the Y to the oil drain tube so it doesn't gunk the turbo. I then did the same in my 1984 300D, since I prefer the frame-mounted air cleaner (engine filter brackets shake and break).

Others have plumbed an after-market cone air filter on the turbo inlet. They plumbed the PCV tube to an after-market "oil mist catch can", which many gas turbo tuner guys use (buy on ebay). I assume they drain oil from the catch can periodically and perhaps pour it into the engine (or pour into used oil recycle jug).

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1984 & 1985 CA 300D's
1964 & 65 Mopar's - Valiant, Dart, Newport
1996 & 2002 Chrysler minivans