Oil in Vacuum Lines

rich_mane · 04-05-2018, 07:37 PM

So I went to change my vacuum lines and found the two coming from the valve cover to the pressure converter/exhaust flap filled with oil. Can't seem to find much information on the internet or the forums here. Only thing I found is pointing to the vacuum pump pumping oil through the system. I just would like to be sure there's not a seal or gasket that can be replaced or if I just need to buy a new vacuum pump. I'm gonna check the vacuum supply line to the valve cover tomorrow to see if it is also filled with oil just to be sure.

Anyone else have this problem?

Supermoon · 09-22-2019, 12:21 AM

Did you ever figure this out?
Mine's getting worse.

Supermoon · 09-22-2019, 12:42 AM

PCV failing?

rich_mane · 09-23-2019, 02:52 PM

Quote:

Originally Posted by Supermoon

PCV failing?

I never really looked too far into it since my motor was performing fine. I had eventually come to the conclusion that the valve cover is just bad, but that's purely on a hunch. Maybe a hairline crack in the vacuum reservoir that allows oil to creep in. I didn't have any other symptoms of a PCV failure like excessive vacuum on the oil cap. It was just oil in the vacuum lines.

Supermoon · 10-04-2019, 02:47 AM

My valve cover was fine.
It turned out to be a leaking diaphragm in the vacuum pump.

Pics:
https://bmwtechnician.com/2016/02/22...p-n54-and-n55/

Replacing the vacuum pump is fairly challenging:
https://www.newtis.info/tisv2/a/en/e...-pump/EIj0QQaf

The pump is $500+ and the labor costs just as much.

TheMidnightNarwhal · 10-04-2019, 09:22 AM

Quote:

Originally Posted by rich_mane

I never really looked too far into it since my motor was performing fine. I had eventually come to the conclusion that the valve cover is just bad, but that's purely on a hunch. Maybe a hairline crack in the vacuum reservoir that allows oil to creep in. I didn't have any other symptoms of a PCV failure like excessive vacuum on the oil cap. It was just oil in the vacuum lines.

Are you still running your car with the un-seized motor?

rich_mane · 10-08-2019, 10:29 AM

Quote:

Originally Posted by TheMidnightNarwhal

Are you still running your car with the un-seized motor?

Yessssir. About 1300 miles in so far. I don't drive it much. But it's still kicking!

Dave92N54 · 03-03-2021, 10:49 PM

Quote:

Originally Posted by rich_mane

Yessssir. About 1300 miles in so far. I don't drive it much. But it's still kicking!

Long shot but what ever happened with this car? I believe my pump diaphragm has begun leaking. I can do the job but dont exactly have time atm. Wondering how long ive got lol

04-05-2018, 07:37 PM	#1
rich_mane First Lieutenant 139 Rep 227 Posts Drives: 2011 E92 335i Join Date: Jan 2016 Location: S.FL iTrader: (1)	Oil in Vacuum Lines So I went to change my vacuum lines and found the two coming from the valve cover to the pressure converter/exhaust flap filled with oil. Can't seem to find much information on the internet or the forums here. Only thing I found is pointing to the vacuum pump pumping oil through the system. I just would like to be sure there's not a seal or gasket that can be replaced or if I just need to buy a new vacuum pump. I'm gonna check the vacuum supply line to the valve cover tomorrow to see if it is also filled with oil just to be sure. Anyone else have this problem?
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09-22-2019, 12:21 AM	#2
Supermoon Lieutenant 166 Rep 429 Posts Drives: 2011 e92 335xi Join Date: Aug 2015 Location: Seoul iTrader: (6) Garage List 2011 BMW 335i xDriv ... [10.00]	Did you ever figure this out? Mine's getting worse. __________________ 2011 E92 335i xDrive Pure Stage 1 \| DV+ & Inlet \| Injen Intake \| M3 Cowl \| ETS 5" FMIC & CP \| Aquamist HFS4 Direct Port \| CSF Radiator \| Wagner Catted DP \| BMW PE \| Apex FL-5 \| Michelin PS4S \| 335is Engine mount \| SDW Monoball thrust arms \| UUC Swaybars & SS Brake lines \| Bilstein B8 \| Dinan Springs & Shock mounts \| Whiteline RSFB \| M3 Rear Control arms \| Manzo Toe arms \| Wavetrac LSD
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09-22-2019, 12:42 AM	#3
Supermoon Lieutenant 166 Rep 429 Posts Drives: 2011 e92 335xi Join Date: Aug 2015 Location: Seoul iTrader: (6) Garage List 2011 BMW 335i xDriv ... [10.00]	PCV failing? __________________ 2011 E92 335i xDrive Pure Stage 1 \| DV+ & Inlet \| Injen Intake \| M3 Cowl \| ETS 5" FMIC & CP \| Aquamist HFS4 Direct Port \| CSF Radiator \| Wagner Catted DP \| BMW PE \| Apex FL-5 \| Michelin PS4S \| 335is Engine mount \| SDW Monoball thrust arms \| UUC Swaybars & SS Brake lines \| Bilstein B8 \| Dinan Springs & Shock mounts \| Whiteline RSFB \| M3 Rear Control arms \| Manzo Toe arms \| Wavetrac LSD
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10-04-2019, 02:47 AM	#5
Supermoon Lieutenant 166 Rep 429 Posts Drives: 2011 e92 335xi Join Date: Aug 2015 Location: Seoul iTrader: (6) Garage List 2011 BMW 335i xDriv ... [10.00]	My valve cover was fine. It turned out to be a leaking diaphragm in the vacuum pump. Pics: https://bmwtechnician.com/2016/02/22...p-n54-and-n55/ Replacing the vacuum pump is fairly challenging: https://www.newtis.info/tisv2/a/en/e...-pump/EIj0QQaf The pump is $500+ and the labor costs just as much. __________________ 2011 E92 335i xDrive Pure Stage 1 \| DV+ & Inlet \| Injen Intake \| M3 Cowl \| ETS 5" FMIC & CP \| Aquamist HFS4 Direct Port \| CSF Radiator \| Wagner Catted DP \| BMW PE \| Apex FL-5 \| Michelin PS4S \| 335is Engine mount \| SDW Monoball thrust arms \| UUC Swaybars & SS Brake lines \| Bilstein B8 \| Dinan Springs & Shock mounts \| Whiteline RSFB \| M3 Rear Control arms \| Manzo Toe arms \| Wavetrac LSD
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