Oil leak in crank seal and shredded serpentine belt

dgliango · 08-31-2011, 11:41 AM

I own a 2007 335i that went out of warranty a few months ago. I was wondering if it was common for just the serpentine belt to be shredded and for there to be a leak in my crank seal?

petermatan · 08-31-2011, 11:43 AM

Probably this

petermatan · 08-31-2011, 11:45 AM

http://n54tech.com/forums/showthread.php?t=11957

The Power steering pulley comes in contact with the subframe, then the belt is compromised and it eventually breaks. Then it will wrap around the crank and break the seal. I was able to catch mine before the catastrophic breaking of the belt. It is known to wrap itself around the crank and break the main seal.

dgliango · 08-31-2011, 11:47 AM

Thanks for the help. I Wish this happened when I was still under warranty...

themyst · 08-31-2011, 12:10 PM

heard this is an issue with 07s, but was corrected in later years.

08-31-2011, 11:41 AM	#1
dgliango Private First Class 19 Rep 110 Posts Drives: 2007 335i E90 Join Date: Aug 2008 Location: Chicago iTrader: (2)	Oil leak in crank seal and shredded serpentine belt I own a 2007 335i that went out of warranty a few months ago. I was wondering if it was common for just the serpentine belt to be shredded and for there to be a leak in my crank seal?
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08-31-2011, 11:43 AM	#2
petermatan New Member 0 Rep 24 Posts Drives: 2007 335i Join Date: Apr 2010 Location: Novato iTrader: (0)	Probably this
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08-31-2011, 11:45 AM	#3
petermatan New Member 0 Rep 24 Posts Drives: 2007 335i Join Date: Apr 2010 Location: Novato iTrader: (0)	http://n54tech.com/forums/showthread.php?t=11957 The Power steering pulley comes in contact with the subframe, then the belt is compromised and it eventually breaks. Then it will wrap around the crank and break the seal. I was able to catch mine before the catastrophic breaking of the belt. It is known to wrap itself around the crank and break the main seal.
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08-31-2011, 11:47 AM	#4
dgliango Private First Class 19 Rep 110 Posts Drives: 2007 335i E90 Join Date: Aug 2008 Location: Chicago iTrader: (2)	Thanks for the help. I Wish this happened when I was still under warranty...
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08-31-2011, 12:10 PM	#5
themyst Major General 177 Rep 6,631 Posts Drives: '16 MK7 GTI Join Date: Feb 2009 Location: NYC iTrader: (8)	heard this is an issue with 07s, but was corrected in later years. __________________ E90 LCI N54 6AT
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