Oil in Throttle body + EGR + Charge air line

mausmaus · 03-17-2017, 08:28 PM

2011 35d, 80k miles

CEL came on, so I hooked up INPA to find a valve actuator short circuit (43D1, 43D2).

I removed the charge air line from the throttle body and saw oil in both the throttle body and the air line. After removing I saw buildup in the EGR as well as more oil.

I have a replacement throttle body, but I need to chase down where the oil is coming from before replacing. Any ideas?

EGR and charge air line in view

Throttle body

EGR valve connection

Charge air line

jandref321 · 03-17-2017, 08:59 PM

WTH?

Valve cover gasket? My finest search skills about diesels yield:
"its comes mostly from poor oil/air seperation of the crankcase breather (and sometimes a turbo with tired oil seals)."

smyles · 03-17-2017, 10:40 PM

For 80k it's totally fine.... I mean, it's as expected. Just clean the EGR.

mausmaus · 03-17-2017, 11:52 PM

Quote:

Originally Posted by smyles

For 80k it's totally fine.... I mean, it's as expected. Just clean the EGR.

Good to hear. I do however suspect the oil as the culprit in short circuiting the throttle actuator. I'd like to find away to reduce the presence of engine oil flowing through.

smyles · 03-18-2017, 07:06 AM

There's a thread on xoutpost about it.

mausmaus · 03-18-2017, 07:30 AM

Quote:

Originally Posted by smyles

There's a thread on xoutpost about it.

thanks you!

Thecastle · 03-18-2017, 10:55 AM

Totally normal. In fact your egr looks really clean compared to most I've seen with that mileage.

Oil comes from the crank case vent, turbos and some leaks around the valve stem seals. So having oil in the intake is totally normal and not preventable.

serge1 · 03-19-2017, 12:26 AM

Poor separation in crank case breather. Totally preventable.
Lookup "ProVent" in that other forum.

I had exact same issue at 90K miles, with addition of crank case return hose (the one going back to intake) decomposing and leaking oil all over engine side.

Increased oil consumption as well.

Since ProVent install (not that hard for DIY), no increase in consumption and throttle body is dry.

socale39 · 03-19-2017, 02:34 PM

Here's how my EGR looked at around your same mileage:

Then after some cleaning with Acetone:

03-17-2017, 08:28 PM	#1
mausmaus New Member 2 Rep 5 Posts Drives: 2011 X5 35d, 328i xDrive LCI Join Date: Nov 2015 Location: Connecticut iTrader: (0)	Oil in Throttle body + EGR + Charge air line 2011 35d, 80k miles CEL came on, so I hooked up INPA to find a valve actuator short circuit (43D1, 43D2). I removed the charge air line from the throttle body and saw oil in both the throttle body and the air line. After removing I saw buildup in the EGR as well as more oil. I have a replacement throttle body, but I need to chase down where the oil is coming from before replacing. Any ideas? EGR and charge air line in view Throttle body EGR valve connection Charge air line
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03-17-2017, 08:59 PM	#2
jandref321 Captain 344 Rep 728 Posts Drives: 2012 X5M Join Date: May 2014 Location: United States iTrader: (1)	WTH? Valve cover gasket? My finest search skills about diesels yield: "its comes mostly from poor oil/air seperation of the crankcase breather (and sometimes a turbo with tired oil seals)." __________________ 2020 G01 X3 30e CURRENT M Sport Package 2019 Ford Raptor SuperCrew CURRENT 802A, KN Drop-in, RB Flaps, Husky Well Liners 2012 E70 X5M SOLD Stg 1+ Turbos, DPs, Velos Stg 2+, JB4, Race Cats, Bavauto Coils 2003 E46 M3 SOLD aFe CAI, AP Axleback, SSK, H&R Springs, TMS CMBR Arms, PF RTABs
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03-17-2017, 10:40 PM	#3
smyles Major 1023 Rep 1,168 Posts Drives: '21 X5 Join Date: Jan 2012 Location: DC iTrader: (0)	For 80k it's totally fine.... I mean, it's as expected. Just clean the EGR.
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03-18-2017, 07:06 AM	#5
smyles Major 1023 Rep 1,168 Posts Drives: '21 X5 Join Date: Jan 2012 Location: DC iTrader: (0)	There's a thread on xoutpost about it.
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03-18-2017, 10:55 AM	#7
Thecastle Major 307 Rep 1,146 Posts Drives: F10 550i Join Date: Apr 2015 Location: Houston, TX iTrader: (0) Garage List 2020 BMW M340i [0.00] 2019 RAM 3500 [0.00] 2020 BMW X3 [0.00] 2016 BMW 550i [0.00] 2000 Ford F450 7.3l ... [0.00]	Totally normal. In fact your egr looks really clean compared to most I've seen with that mileage. Oil comes from the crank case vent, turbos and some leaks around the valve stem seals. So having oil in the intake is totally normal and not preventable.
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03-19-2017, 12:26 AM	#8
serge1 First Lieutenant 32 Rep 389 Posts Drives: X5 35d Join Date: Oct 2011 Location: Seattle iTrader: (0) Garage List 2011 BMW X5 35d [0.00]	Poor separation in crank case breather. Totally preventable. Lookup "ProVent" in that other forum. I had exact same issue at 90K miles, with addition of crank case return hose (the one going back to intake) decomposing and leaking oil all over engine side. Increased oil consumption as well. Since ProVent install (not that hard for DIY), no increase in consumption and throttle body is dry.
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03-19-2017, 02:34 PM	#9
socale39 Major 209 Rep 1,044 Posts Drives: 04 545i SMG Join Date: Jan 2011 Location: California iTrader: (0)	Here's how my EGR looked at around your same mileage: Then after some cleaning with Acetone:
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