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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Oil Leak - Rear Main Seal



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      03-18-2023, 02:19 PM   #1
mikeyoooooo
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Oil Leak - Rear Main Seal

Was changing my oil today and noticed behind the drain bolt looked to be wet with oil. Car has 105k on it at this point and turbos are def shot. Coupd it be anything else but turbos and read main seal?
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      03-28-2023, 02:48 PM   #2
iqraceworks
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Could be the oil pain gasket, or valve cover leaking down the side of the block. Take that bottom pan cover off, get under the car, clean everything off rely good with degreaser, run the car for a while, them see where the oil is coming from.

Oil pan and valve cover gasket are pretty common leak points.
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      03-29-2023, 12:32 AM   #3
feuer
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It’s all caked there. Has been leaking for a while. Probably oil pan gasket.
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      04-23-2023, 08:50 AM   #4
mikeyoooooo
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That was suspicion was oil pain gasket. I’ll have to get into it next weekend. Heard oil pan gasket is a huge PITA
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      04-23-2023, 02:28 PM   #5
Pittz1
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Huge PIA and costly. Time consuming.
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      04-23-2023, 04:16 PM   #6
Saif2018
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Quote:
Originally Posted by Pittz1 View Post
Huge PIA and costly. Time consuming.
Unfortunately that's typical for N54, pretty much every single gasket and seal you can think off.
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      04-23-2023, 05:45 PM   #7
Pittz1
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Nah, I will take OFHG and VCG twice over before OPG.
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