Oil leak

E92.Dom · 03-26-2019, 07:08 AM

I have a 2012 335i coupe and recently discovered an oil leak, was wondering if anyone could point me in the right direction of what it could be [IMG][/IMG]

robthewrench · 03-26-2019, 07:25 AM

Two most common leaks are the oil filter housing on the front driver's side of the engine and the valve cover gasket on the passenger side. And I when I say common, I mean really common, like it happens to every single one of us.

Based on your pictures, most of that oil appears to be on the passenger side, so I'd check the valve cover. That looks like a lot of oil. Either the leak is decently large, or it has been leaking for a long time. The top of the engine is tilted towards the passenger side, so oil pools against the valve cover on that side.

E92.Dom · 03-26-2019, 07:29 AM

I have a new oil filter housing cap ordered already should be delivered this week but it's leaking a lot of oil which has me worried it's something else

msjt · 03-26-2019, 07:51 AM

Looks like Oil Pan or Rear Main Seal.

robthewrench · 03-26-2019, 10:25 AM

Quote:

Originally Posted by E92.Dom

I have a new oil filter housing cap ordered already should be delivered this week but it's leaking a lot of oil which has me worried it's something else

After you change the cap, look at the base of the housing next to the engine block for continued leaks from the gasket between the housing and the block. This is really, really common for this to leak.

BKV122 · 03-29-2019, 07:50 PM

If its the cap or OFHG you'd see it around the OFH. Thats under the car, so like msjt said , might be rear main seal or oil pan

E92.Dom · 04-01-2019, 06:48 AM

Update: a friend and I got under the car after it started leaking way worse, as in had to put a quart in just to get to his house, we found the oil pan bolts got loose so we tightened them up and no leaks since

Oolien · 04-14-2019, 11:26 PM

have similar issue, did you ever change the oil pan prior to this leak happening?

Efthreeoh · 04-19-2019, 10:09 AM

Quote:

Originally Posted by Oolien

have similar issue, did you ever change the oil pan prior to this leak happening?

Oil pan leak is what your car has.

Speedy_12139 · 04-19-2019, 02:04 PM

That's a pan leak... I would probably suggest replacing that gasket soon...

And if you tightened the bolts. You likely stretched then way too much. So be prepared for them to snap when you go to remove them.

The aluminum fasteners on these cars take "nothing more than finger tight"

Ahahah or they strip/snap.

03-26-2019, 07:08 AM	#1
E92.Dom Private First Class 64 Rep 155 Posts Drives: 2012 bmw e92 335i Join Date: Oct 2018 Location: New Jersey iTrader: (0)	Oil leak I have a 2012 335i coupe and recently discovered an oil leak, was wondering if anyone could point me in the right direction of what it could be [IMG][/IMG] Attached Images
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03-26-2019, 07:25 AM	#2
robthewrench Captain 266 Rep 952 Posts Drives: 11 E90 335i Join Date: Aug 2014 Location: Columbus OH iTrader: (0)	Two most common leaks are the oil filter housing on the front driver's side of the engine and the valve cover gasket on the passenger side. And I when I say common, I mean really common, like it happens to every single one of us. Based on your pictures, most of that oil appears to be on the passenger side, so I'd check the valve cover. That looks like a lot of oil. Either the leak is decently large, or it has been leaking for a long time. The top of the engine is tilted towards the passenger side, so oil pools against the valve cover on that side. __________________ bone stock
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03-26-2019, 07:29 AM	#3
E92.Dom Private First Class 64 Rep 155 Posts Drives: 2012 bmw e92 335i Join Date: Oct 2018 Location: New Jersey iTrader: (0)	I have a new oil filter housing cap ordered already should be delivered this week but it's leaking a lot of oil which has me worried it's something else
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03-26-2019, 07:51 AM	#4
msjt First Lieutenant 160 Rep 305 Posts Drives: e92 335i Join Date: Jan 2013 Location: queens, nyc iTrader: (0)	Looks like Oil Pan or Rear Main Seal.
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03-29-2019, 07:50 PM	#6
BKV122 Major 47 Rep 1,160 Posts Drives: E90 Join Date: Feb 2009 Location: NY iTrader: (1) Garage List 2006 330xi [9.50]	If its the cap or OFHG you'd see it around the OFH. Thats under the car, so like msjt said , might be rear main seal or oil pan __________________ Monaco Blue 330xi - Terra Interior/6-MT/Sport/Premium/Cold/CSL's/M3 Spoiler Lip/Black Kidney's
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04-01-2019, 06:48 AM	#7
E92.Dom Private First Class 64 Rep 155 Posts Drives: 2012 bmw e92 335i Join Date: Oct 2018 Location: New Jersey iTrader: (0)	Update: a friend and I got under the car after it started leaking way worse, as in had to put a quart in just to get to his house, we found the oil pan bolts got loose so we tightened them up and no leaks since
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04-14-2019, 11:26 PM	#8
Oolien Enlisted Member 3 Rep 47 Posts Drives: 08 bmw 335xi n54 Join Date: Apr 2019 Location: canada iTrader: (0)	have similar issue, did you ever change the oil pan prior to this leak happening?
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04-19-2019, 02:04 PM	#10
Speedy_12139 Private 31 Rep 92 Posts Drives: 2011 335i xDrive Join Date: Jul 2018 Location: Ontario, Canada iTrader: (0)	That's a pan leak... I would probably suggest replacing that gasket soon... And if you tightened the bolts. You likely stretched then way too much. So be prepared for them to snap when you go to remove them. The aluminum fasteners on these cars take "nothing more than finger tight" Ahahah or they strip/snap.
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