Pulley squeal

Mikaeldarer · 09-22-2016, 11:15 AM

Hello,

Just reposting this from another forum to see if anyone can help out here:

Strange noise that occurs during down rev and sometimes continues during idle. No other symptoms other than noise and only happens once RPM's begin to drop. Changed the belt tensioner, belt, deflection pulley, and idler pulley. Seemed to help at first but after some harder driving the noise quickly returned. Here is a quick clip of the noise:

weehe126 · 09-22-2016, 11:18 AM

Man, third one this week and the others are still on the first page. You need a new valve cover.

Mikaeldarer · 09-22-2016, 12:45 PM

Quote:

Originally Posted by weehe126

Man, third one this week and the others are still on the first page. You need a new valve cover.

yup, saw the other threads after posting

. Thanks!

vespa · 09-22-2016, 04:10 PM

Yep, that's exactly the sound of a front main seal sucking in air. See the valve cover threads for diagnosis and repair.

09-22-2016, 11:15 AM	#1
Mikaeldarer Second Lieutenant 69 Rep 226 Posts Drives: 2011 e90 335i N55 Join Date: Feb 2015 Location: South Florida iTrader: (0)	Pulley squeal Hello, Just reposting this from another forum to see if anyone can help out here: Strange noise that occurs during down rev and sometimes continues during idle. No other symptoms other than noise and only happens once RPM's begin to drop. Changed the belt tensioner, belt, deflection pulley, and idler pulley. Seemed to help at first but after some harder driving the noise quickly returned. Here is a quick clip of the noise:
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09-22-2016, 11:18 AM	#2
weehe126 Brigadier General 1161 Rep 3,189 Posts Drives: 2017 340i Join Date: Apr 2014 Location: San Antonio iTrader: (2)	Man, third one this week and the others are still on the first page. You need a new valve cover.
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09-22-2016, 04:10 PM	#4
vespa First Lieutenant 217 Rep 245 Posts Drives: 2011 335i Join Date: Dec 2014 Location: Thousand Oaks iTrader: (0)	Yep, that's exactly the sound of a front main seal sucking in air. See the valve cover threads for diagnosis and repair.
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