OK. the car is beginning to annoy me.
EGR is gone, so no more soot, but the oil is still collecting in there.
WHO took away the oil separator? I understand that moving the air filter to the fender made it difficult, but the 240 had one in the engine bay... why not keep one in the circuit?
anybody modded their 603's to put one inline?

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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!

My 603 didn't seem to put that much oil into the intake in the first place The design of the valve cover would tend to separate the oil out, the gasses have to travel nearly its full length to exit out of the breather.

-J

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1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket

Tesla Model 3. 205,000 miles. Been to 48 states!
Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels.
2014 Cadillac ELR
2013 Fiat 500E.

I never have oil out there?

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hum.....
1987 300TD 311,000M Stolen. Presumed destroyed

well, I'm sure most of these cars if the vapor is collecting on the intake, it just gets burned. however, on mine, the intake gasket must not seal all the way. I'm getting oil seepage out the bottom of a few runners.
I'd like a dedicated oil separator

__________________
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!

There shouldn't be much oil in there. I'd wonder about how effective an oil separator would be with so little oil. On my w123 oil manages to get past the separator.

i'm experiencing the same thing. what is this an indication of? anything that needs done? valve guides?

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85 190E 2.3(SOLD)
86 230E (-->300D) sold
87 300D (-->300TD) sold
68 250S w/ a 615 and manual tranny (RIP)
87 300TD (SOLD)
95 S280 "The KRAKEN" (Turbo 2.9 602 transplant) traded
86 190E 2.3... current project

hmmm....I 'm in the same boat except it's coming out of the gasket between the cross-over tube over the valve cover and the intake runners; dripping on the IP. I don't think there should be much oil in there at all, right? Isn't that an indication that the turbo seal is failing or failed? or is that oil coming from the valve cover tube into the air intake boot (pre-turbo)?

Sounds like a few have the same issue. The inside of the intake is wet with oil.

My EGR valve is blocked off too...

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1987 300TD 147,000 miles- Palomino leather interior, 1995 facelift and body cladding, E350 wheels, Rebuilt suspension and sport springs, rebuilt turbo, New Monarch injection pump and injectors....and the list goes on and on...

After cleaning my intake and valve cover, i plugged the EGR and the breather intake near the turbo and got a long pipe to vent the breather to atmosphere like an 18wheeler truck. Its very clean now.

How much oil comes out of the valve cover breather?

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1987 300TD 147,000 miles- Palomino leather interior, 1995 facelift and body cladding, E350 wheels, Rebuilt suspension and sport springs, rebuilt turbo, New Monarch injection pump and injectors....and the list goes on and on...

I looked into doing the oil separator myself but was cautioned because apparently it was done on purpose to help lubricate the turbo. Not sure if this is correct but I heard it from some reliable sources.

I recently replaced my Ventilation hose with a rubber elbow from Discount Auto, a couple double sided barbed fittings, and some clear hose. It stays fairly oily but there is no way to tell how much is flowing through there.

I think you just need to replace the gasket and at the same time, clean the manifold and crossover tube out. I pulled my crossover and scraped all sorts of gunk out of it. The cylinder/funnel the is on the passengers side had a lot of buildup. It was maybe 20% restricted. I cleaned it out but never noticed much improvement if any so I doubt is an issue. This was at 175k and the EGR was bypassed around 160k.

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1987 300TDT - 195,000 (Original #14 head)
1993 190E 2.3 - 105,000
1981 300D - 250,000

The oil from the breather does not come into contact with any bearing surfaces on the turbo. I can't see it helping the turbo, if anything it's slightly worse because it sticks to the vanes. But then again oil will leak past the turbo's seal getting on the vanes anyway. That's one of the main reasons I think a CCV re-route is not needed, the turbo will put oily vapors into the intake anyway.

-J

__________________
1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket

Tesla Model 3. 205,000 miles. Been to 48 states!
Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels.
2014 Cadillac ELR
2013 Fiat 500E.

sooooo... is this supposed to be normal? or is it blowby related?

__________________

85 190E 2.3(SOLD)
86 230E (-->300D) sold
87 300D (-->300TD) sold
68 250S w/ a 615 and manual tranny (RIP)
87 300TD (SOLD)
95 S280 "The KRAKEN" (Turbo 2.9 602 transplant) traded
86 190E 2.3... current project

I found my old thread about this:

603 Breather Hose to Oil Separator

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1987 300TDT - 195,000 (Original #14 head)
1993 190E 2.3 - 105,000
1981 300D - 250,000

It is normal to have oil vapors, but it shouldn't have enough to pool unless the engine is run cold a lot and the oil is condensing frequently on the inside of the alumium runners, or there's excessive blowby.

The cam cover is baffled to prevent oil getting into the breather system, but the more flow you have, the more oil you'll have.

If it doesn't affect the driveability of the car, I'd just re-gasket and run it.

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Gone to the dark side

- Jeff

I was working on the '87 today and noticed something that might be significant.

Originally, the crankcase breather tube was insulated. It probably wasn't for noise, and it wasn't for abrasion (a gap in the insulation for a grommet), so it must have been for heat.

If the oil vapors travel down a cool tube they will condense and drip into the rubber boot below. If the tube remains warm and doesn't cool the vapors, it should remain vapor in through the turbo and intake runners (hot after the turbo).

Try insulating the tube again?

__________________

Gone to the dark side

- Jeff