I just got done installing new Monark nozzles on my OM617.951 motor. It was running fine before, just wanted to do it to see if it would help with acceleration. Before the nozzle install, I never saw the Oil Pressure get up to 100 psi on the gauge, always about 80 at cold start. When I started it up, the oil pressure went to about 100 psi, which I dont think is really a problem. However, after driving it for 10 minutes and returning home, I noticed oil sprayed all over the bottom of the engine. Oil is leaking out of the turbo oil drain right at the grommet going into the pan.

One thing I also did was install an oil catch can. The crank case was simply connected directly to the air intake previously. I do not have the stock intake setup... I wanted to separate the oil so that oil wasnt spraying into the intake, so I installed an oil catch can. I really dont think that would have had any effect though, it is definitely flowing air just fine with no restriction.

Did the new nozzles result in higher oil pressure? Is that possible?

Seriously doubt new injectors will affect the engine oil-pressure....

More likely it was colder than usual and the oil in the pan thicker than normal....

Does your car have a mechanical or electrical oil-pressure gauge?

__________________
http://i190.photobucket.com/albums/z...0TDnoplate.jpg

Alastair AKA H.C.II South Wales, U.K. based member

W123, 1985 300TD Wagon, 256K,
-Most recent M.B. purchase, Cost-a-plenty, Gulps BioDiesel extravagantly, and I love it like an old dog.

W114, 1975 280E Custard Yellow,
-Great above decks needs chassis welding--Really will do it this year....

its your oil catch can. remove it and put it back to stock and you will have no more problems.

__________________
85 300D turbo pristine w 157k when purchased 161K now
83 300 D turbo 297K runs great. SOLD!
83 240D 4 spd manual- parted out then junked

Is your catch can system failing to relieve crankcase pressure?

__________________
1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13

... where is the catch can plumbed? do you have pictures? what kind of gauge do you have? most only read 45psi... obviously they peg with cold oil...

__________________
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!

the catch can has two ports on top (in/out) and a drain on the bottom. The crankcase is plumbed to the top of the catch can, the other top port is plumbed to the air intake. The drain at the bottom runs to the oil pan. I have an aftermarket electric oil pressure gauge and sender. I started it up, and the line going into the air intake has hot air blowing out from the catch can. Also, the air intake will be pulling the air as well so the crankcase is definitely venting...

Previously,

If the smallest passage in your Catch Can System is smaller than the smallest passage in the original system it can cause pressure to build up.

The Turbo drains by gravity. You might also check to be sure the Oil levek is not too High.

If your old Injector Nozzles were really bad the new ones could raise you idle speed a bit and increased Engine speed can increase the Oil Pressure at idle speed.

If you recently changed the 2 O-rings at the Bottom of the Oil Filter Cap Tube that can also raise your Idle Oil Pressure.

__________________
84 300D, 82 Volvo 244Gl Diesel

I did put a slightly smaller diameter hose on the line from the catch can to the intake. I will try replacing it with a larger hose. Does the catch can need to be vented back into the intake at all? Is there any difference between just venting it to air or should it go back to the intake?

617.951 would be a 300SD 81 - 85. You do not have the stock set up, so I presume you have installed a Cold Air Intake? A K&N or Chicom knock off style Filter?

Any restriction in the Blow-by fumes from the valve Cover to the intake can create back pressure and will cause some oil leakage some where, as the pressure has to escape from the crank case.

A Draft Tube from your catch can will work, but again, if you have restricted the hose diameter from stock, it won`t flow properly.

Try using a longer hose from the VC and let it hang down as a Draft Tube to see if your leakage stops. you will get oil dripping out of the hose, so be aware. this will be from the oil fumes condensing from the fumes.

If you can post a picture of your set up will help with the visual aspect of things.

Fuel pressure from your new nozzles and engine oil pressure are two unrelated things. you will get an increase in oil pressure with the increase in eng RPM`s.


Charlie

__________________
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 understand the difference between fuel pressure and oil pressure. I was more wondering if new nozzles resulted in better combustion/somehow result in higher oil pressure. I let the breather hose vent to atm yesterday and drove it around, no more leak out of the turbo drain line. However, the oil pressure is definitely running higher than it was before the new nozzles (this is a good thing I know, but it still makes me curious...)

So I have seen people say these diesels actually like the gasses circulated back into the intake. If it is in any way better to do this, then I will get a better setup to make it happen. But if it really makes no difference, then I will just vent it to atm.

My intake is very simple, it is a flexible 3" tube from the turbo to an inline airbox made by Spectre. Its 3" in/out with a 4" diameter middle section that houses the cone air filter. Spectre rates it at 400 CFM.

I wonder, Why you would want to change the original stock set-up to what you have now anyway! Lot of expense and work for nothing gained.
--Any perceived improvements in acceleration--will be purely psychological!

The stock set-up is perfectly adequate airflow wise, you can be sure M.B. designed it to perform well.

Crank-Case gasses should Never be vented to atmosphere--They are Carcinogenic (due to the oil-vapour/mists) and allegedly cause or contribute to Smog....

__________________
http://i190.photobucket.com/albums/z...0TDnoplate.jpg

Alastair AKA H.C.II South Wales, U.K. based member

W123, 1985 300TD Wagon, 256K,
-Most recent M.B. purchase, Cost-a-plenty, Gulps BioDiesel extravagantly, and I love it like an old dog.

W114, 1975 280E Custard Yellow,
-Great above decks needs chassis welding--Really will do it this year....

It does need to be vented and the vent needs to be at lest as large as the Hose ID.
Several Members have a Catch Can vented to the atmosphere with no issues.

Does the Turbo Drain Gromment need to be changed?

__________________
84 300D, 82 Volvo 244Gl Diesel