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Go Back   E46Fanatics > Tuning & Tech > Driveline, Engine & DME Tuning

Driveline, Engine & DME Tuning
Talk about driveline improvements, NA tuning and DME tuning your E46 BMW here. This includes diffs, intakes, exhausts, chips, software and OBD tuning.

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Old 10-27-2012, 09:02 PM   #1
gzagenius
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Need help with an oil leak. Ive been sesrching...

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This is what it looks like (although its a sample pic)
The leak after cleaning, ive noticed is not the drain plug. Rather its something dripping down from up higher on the passenger side a little further up from this abnormally big bolt that some of you may be familiar with. I was told it could be the rear main seal but am hoping its not. There are no signs anywhere under the hood of leaking, not near the fan, oil filter housing or the left shield on the left side if the motor. Someone tell me it may not be a rear main seal and if it is what $ am i looking at more or less if i bring it to a shop.

Thanks for any input guys.
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Old 10-27-2012, 09:03 PM   #2
gzagenius
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I have a 2001 m3 with 90k by the way
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Old 11-08-2012, 12:17 AM   #3
silvrXI
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"Constant pressure valve". Its a small plug on the upper portion of the block behind the exhaust manifolds. Pretty common and when it leaks, IT LEAKS!!! Whats needed for replacement is a 3/8s drive PHILLIPS bit, basically a large screw driver turned into a socket. At the dealer, they will sometimes charge you labor to remove the manifolds to gain access, but a good technician will know how to get the job done. On realoem u can find this part, its no more than 30 bucks.
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