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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N55 Turbo Engine Tuning and Exhaust Modifications - 335i Tuning > Engine oil leak



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      02-20-2021, 09:26 PM   #1
Nickster2304
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2011 335i xdrive N55. Having trouble finding engine oil leak. At first thought it was the turbo oil return line since it looked to be possible cause. Replaced both O rings and hose clamps since the one use clamps were loose. This did not fix the oil leak. Any ideas where it could be coming from based on pics? Or other areas to look? Pics looking up from bottom passenger side
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      02-23-2021, 12:37 PM   #2
Street of Rage
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That's the water pump.. Could possibly be the valve cover gasket leak from passenger side
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      02-23-2021, 12:51 PM   #3
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I would suspect its coming from the valve cover.
Have you tried just running a paper towel or a clean rag around the sides of the valve cover?
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      02-23-2021, 06:16 PM   #4
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Other places to look:

Timing chain tensioner
Camshaft position sensor
Exhaust vanos solenoid

Worst case, but not likely: bedplate gasket
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      Yesterday, 08:53 PM   #5
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Thanks all. Now cannot get hood open. Drivers side hood release cable must of popped off. Pulled left front tire off and wheel well cover off only to find cable off on drivers side. Passenger side still works.
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