high pitch whine at idle

Juicehead · 07-21-2011, 09:43 AM

Does anyone know WTH this noise is?

You will need to view it in HD due to the high pitch. The lower sample rate will not catch it.

http://www.youtube.com/watch?v=WzZ1JE7WeYs

Dackelone · 07-21-2011, 07:30 PM

Its probably one of the bearings in the serpintine belt going bad. It could also be the AC compressor or alterntor or PS pump as well. Anything driven by that polly ribbed belt serpintine belt.

First I would look real closely to the ribs on the belt for cracks. You could try some belt dressing sprayed on the belt... but I would just have your dealer look at it.

MilehighM3 · 07-21-2011, 11:23 PM

N55? Rear crank seal if it is...

Juicehead · 07-22-2011, 06:56 AM

no, N54. I figured it was a belt. I thought about the power steering as well, I need to check it.

07-21-2011, 09:43 AM	#1
Juicehead Lieutenant 100 Rep 562 Posts Drives: Raptor Join Date: Sep 2010 Location: Tampa, FL iTrader: (3)	high pitch whine at idle Does anyone know WTH this noise is? You will need to view it in HD due to the high pitch. The lower sample rate will not catch it. http://www.youtube.com/watch?v=WzZ1JE7WeYs
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07-21-2011, 07:30 PM	#2
Dackelone European Editor 10596 Rep 22,992 Posts Drives: N54 e82 Join Date: Feb 2010 Location: Bayern, Germany iTrader: (1)	Its probably one of the bearings in the serpintine belt going bad. It could also be the AC compressor or alterntor or PS pump as well. Anything driven by that polly ribbed belt serpintine belt. First I would look real closely to the ribs on the belt for cracks. You could try some belt dressing sprayed on the belt... but I would just have your dealer look at it.
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07-21-2011, 11:23 PM	#3
MilehighM3 Brigadier General 915 Rep 3,456 Posts Drives: Harrop E90 M3 Join Date: May 2011 Location: Colorado Springs iTrader: (14) Garage List 2009 E90 M3 [6.50]	N55? Rear crank seal if it is...
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07-22-2011, 06:56 AM	#4
Juicehead Lieutenant 100 Rep 562 Posts Drives: Raptor Join Date: Sep 2010 Location: Tampa, FL iTrader: (3)	no, N54. I figured it was a belt. I thought about the power steering as well, I need to check it.
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