Oil leaking near water pump

northbranchroad · 11-11-2017, 05:01 PM

I understand that the 3 most common n55 oil leaks are OFHG, oil pan gasket, and valve cover gasket. I have oil all over my water pump, sway bar, and everything else down there. Can anyone help me pin point this leak?

57k

Bavarian Tech · 11-11-2017, 05:39 PM

OFH

juld0zer · 11-12-2017, 05:32 AM

Yeah start there. Oil dribbles down then airflow and fan operation blows it backwards.

Thoroughly degrease the entire engine afterwards. Pay attention to the side underneath the intake manifold

northbranchroad · 11-12-2017, 12:09 PM

I am just going to start by replacing the ofhg and the oil cooler gasket. Does anyone know on a 2011, if it’s required to take off the intake manifold / should I be replacing the intake mainfold seals?

Nebo · 11-12-2017, 07:41 PM

You can get away with just loosening the intake manifold.

northbranchroad · 11-12-2017, 09:45 PM

Thank you!

juld0zer · 11-13-2017, 06:03 AM

Quote:

Originally Posted by Nebo

You can get away with just loosening the intake manifold.

ie. Remove all nuts and bolts and elevate it

OneMoreAlex · 11-13-2017, 04:10 PM

as others said OFHG is probably to blame, I was able to see mine leaking only on cold start.

Just a heads up those 3 bolts strip VERY easily.. What should have been a (relatively) simple job took me hours to complete. There's very limited room to fit any kind of tool in there, proper tools are a must, you will need quality e-torx sockets, swivels, and extensions. I recommend replacing the bolts while you're at it.

11-11-2017, 05:01 PM	#1
northbranchroad Private 3 Rep 58 Posts Drives: 2011 Bmw 335i xdrive sedan Join Date: Aug 2017 Location: Denver Colorado iTrader: (0)	Oil leaking near water pump I understand that the 3 most common n55 oil leaks are OFHG, oil pan gasket, and valve cover gasket. I have oil all over my water pump, sway bar, and everything else down there. Can anyone help me pin point this leak? 57k Attached Images
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11-11-2017, 05:39 PM	#2
Bavarian Tech Major 270 Rep 1,206 Posts Drives: 335i Join Date: Jan 2007 Location: Pittsburgh/Harrisburg iTrader: (15) Garage List 2006 330i [10.00]	OFH
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11-12-2017, 05:32 AM	#3
juld0zer Lieutenant Colonel 480 Rep 1,600 Posts Drives: Prev 135i 7DCT, Now 130i 6sp Join Date: Jul 2016 Location: 2153 iTrader: (0)	Yeah start there. Oil dribbles down then airflow and fan operation blows it backwards. Thoroughly degrease the entire engine afterwards. Pay attention to the side underneath the intake manifold
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11-12-2017, 12:09 PM	#4
northbranchroad Private 3 Rep 58 Posts Drives: 2011 Bmw 335i xdrive sedan Join Date: Aug 2017 Location: Denver Colorado iTrader: (0)	I am just going to start by replacing the ofhg and the oil cooler gasket. Does anyone know on a 2011, if it’s required to take off the intake manifold / should I be replacing the intake mainfold seals?
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11-12-2017, 07:41 PM	#5
Nebo Private 17 Rep 57 Posts Drives: 2013 E92 M3 Join Date: Dec 2016 Location: WA iTrader: (0) Garage List 2013 E92 M3 [0.00] 2011 BMW 335i [0.00]	You can get away with just loosening the intake manifold.
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11-12-2017, 09:45 PM	#6
northbranchroad Private 3 Rep 58 Posts Drives: 2011 Bmw 335i xdrive sedan Join Date: Aug 2017 Location: Denver Colorado iTrader: (0)	Thank you!
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11-13-2017, 04:10 PM	#8
OneMoreAlex Second Lieutenant 45 Rep 194 Posts Drives: 2012 e92 335i Join Date: Aug 2015 Location: Long Island, NY iTrader: (0)	as others said OFHG is probably to blame, I was able to see mine leaking only on cold start. Just a heads up those 3 bolts strip VERY easily.. What should have been a (relatively) simple job took me hours to complete. There's very limited room to fit any kind of tool in there, proper tools are a must, you will need quality e-torx sockets, swivels, and extensions. I recommend replacing the bolts while you're at it. __________________ 12' 335i \| CP-E CP \| MHD \| VRSF DP \| ALPINA B3 \|
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