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BMW 3-Series (E90 E92) Forum
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Can’t find my oil leak help :(
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02-25-2020, 09:43 PM | #1 |
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Can’t find my oil leak help :(
Hello everyone! So I own an 07 335i sedan. Lately my car has been leaking oil onto the ground when I park, I smell oil burning and will see slight smoke from the hood. The cars valve cover gasket has been replaced 10,000 miles ago along with oil pan gasket. I got new turbos less than 5,000 miles ago. Any ideas on where to look? I noticed exhaust was getting on my downpipe towards the bottom right next to the connection of the downpipe to the rest of the exhaust. Any help/ideas/tips would be GREATLY appreciated. Thanks for reading
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02-25-2020, 10:36 PM | #2 |
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Drives: 89 E30 325is, E92 335i N54
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Oil filter housing leaking, cracked valve cover?
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02-26-2020, 08:39 AM | #3 |
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02-26-2020, 08:41 AM | #4 |
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Drives: 09 E90 335i M-Sport 6MT RWD
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Pain to check but if its neither of those, have a look at the turbo feed/drains? its possible a bolt is slightly loose or the line as a crack somewhere.
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02-26-2020, 12:00 PM | #5 |
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02-26-2020, 12:32 PM | #6 |
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Cheater trick, run Liqui Moly Molygen for your next oil change. After a few days take a black light in a dark garage to the engine bay. It has an additive that'll glow under UV light.
As for leak locations, it sounds like you have a good plan for points to check. I'll say the oil feed tubes even on recently replaced turbos are beyond common, and usually one of my first places to check. -James |
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02-26-2020, 12:51 PM | #7 | |
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Quote:
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02-27-2020, 03:15 PM | #8 |
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I'd shine a light around the exhaust manifold and look for oil stains. It could be incorrectly torqued valve cover bolts, an incorrectly seated VCG or cracked valve cover. The OFHG doesn't really leak onto anything except a belt, pulley or belly pan.
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