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E90/E92/E93 M3 (2008 - 2014)
4th generation E90 M3 sedan, E92 M3 coupe and E93 M3 convertible. The last of the naturally aspirated M3s, powered by a 4.0 liter V8 making 414hp and 295 lb-ft of torque.

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  #1  
Old 02-03-2013, 06:21 PM
Jaysea7 Jaysea7 is offline
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Location: Upland, CA
 
Join Date: Feb 2011
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Mein Auto: 2011 M3 coupe
Question Oil Blowby from Filler Cap

I noticed some oil streaks around the oil filler cap. Is this normal?
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  #2  
Old 02-07-2013, 09:06 AM
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TeaRex714 TeaRex714 is offline
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I just discovered Monday that mine has started doing that! It hasn't before now, so I don't think it's normal. A new cap is about $20; I might just replace mine in case it's the seal getting stiff or something.
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Old 02-07-2013, 12:08 PM
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thekurgan thekurgan is online now
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Location: Sacramento, CA
 
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This is a known issue. There was a part change on the cap after '10 I believe. One key thing is to keep the cap rubber ring clean as well as the mating surface. Make sure neither surface is dry, or the rubber will bunch up. You can also gently bend the fasteners to make a tighter seal.
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Old 02-07-2013, 03:33 PM
Jaysea7 Jaysea7 is offline
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Thank you for the tip.

I'll have a look tonight.

Jaysea7
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