E90 N52 Intake Manifold Oil Leak

Suvorovo · 04-02-2022, 02:18 PM

N52 Car is running fine, no issues with PCV. Is there a tiny oil leak coming out of the intake manifold due to failing PCV valve? Is this the normal amount of gunk/very slight dampness around the nooks and crannies of the engine block?

The valve cover and OFHG are completely dry. These cars don't have issues with head gaskets.

Photo is taken between one of the intake manifold ribs.

Not sure why image isn't posting:

https://ibb.co/MZVd6Wn

TGTIW · 04-03-2022, 10:34 AM

It's a bit hard to tell from the photo, but that looks like the usual amount of gunk that accumulates under the intake manifold. I can't really see anything that looks damp or could be fresh oil.

Suvorovo · 04-03-2022, 12:00 PM

Thanks a lot for confirming!

TGTIW · 04-03-2022, 12:26 PM

I've never heard of oil leaking from the intake manifold. Some people have reported what they felt was an unusual amount of oil sitting in it, but unless it's damaged that's where it stays. I think you be seeing some idle issues if there where any cracks and vacuum leaks.
Valve covers and OFHG are your main gremlins and valve covers leak on the exhaust side.

StradaRedlands · 04-03-2022, 02:23 PM

Quote:

Originally Posted by Suvorovo

Not sure why image isn't posting:

https://ibb.co/MZVd6Wn

Here's your image, I opened it in a new tab from the site that was hosting it:

04-02-2022, 02:18 PM	#1
Suvorovo Lieutenant 281 Rep 524 Posts Drives: Creaky e90 330xi 6MT Join Date: Feb 2022 Location: New Jersey iTrader: (0)	E90 N52 Intake Manifold Oil Leak N52 Car is running fine, no issues with PCV. Is there a tiny oil leak coming out of the intake manifold due to failing PCV valve? Is this the normal amount of gunk/very slight dampness around the nooks and crannies of the engine block? The valve cover and OFHG are completely dry. These cars don't have issues with head gaskets. Photo is taken between one of the intake manifold ribs. Not sure why image isn't posting: https://ibb.co/MZVd6Wn
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04-03-2022, 10:34 AM	#2
TGTIW Second Lieutenant 143 Rep 258 Posts Drives: 2010 328i Join Date: May 2013 Location: Knoxville iTrader: (2)	It's a bit hard to tell from the photo, but that looks like the usual amount of gunk that accumulates under the intake manifold. I can't really see anything that looks damp or could be fresh oil.
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04-03-2022, 12:00 PM	#3
Suvorovo Lieutenant 281 Rep 524 Posts Drives: Creaky e90 330xi 6MT Join Date: Feb 2022 Location: New Jersey iTrader: (0)	Thanks a lot for confirming!
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04-03-2022, 12:26 PM	#4
TGTIW Second Lieutenant 143 Rep 258 Posts Drives: 2010 328i Join Date: May 2013 Location: Knoxville iTrader: (2)	I've never heard of oil leaking from the intake manifold. Some people have reported what they felt was an unusual amount of oil sitting in it, but unless it's damaged that's where it stays. I think you be seeing some idle issues if there where any cracks and vacuum leaks. Valve covers and OFHG are your main gremlins and valve covers leak on the exhaust side.
	Appreciate 0 Quote