Whirring noise under engine braking

RoundTwo · 07-31-2012, 07:43 PM

I've tried searching the forums and I cannot find anything exactly like what I am experiencing. The noise I'm trying to describe is only noticeable with a closed throttle and is louder at high speeds. (Think, coming off the highway on an offramp). It is a low pitch noise that drops in tone as you slow down. It could be something in the wheel well, like an unbalanced tire, or possibly something in the engine bay. The thing throwing me off is that there is no effect on ride quality and no shaking in the steering wheel, so that is why I am lead to believe that it isn't a tire issue.

Anyone out there have any experience with this, or can possibly chime in on factors that may be attributing to this whirring?

- Only previous incident I have had with the car was running over part of a shredded tire on the highway. It went under the center of the car.

Thanks!

GIdriver · 07-31-2012, 07:47 PM

Difficult with the info provided, at least for me. Can the sound by captured in a video?

RoundTwo · 07-31-2012, 07:56 PM

Possibly, may still not be audible enough to capture in the cockpit. The only thing I'm coming up with outside of this forum is a wheel bearing issue. Is that possible?

Echo M3 · 07-31-2012, 07:59 PM

Is it RPM-dependent? If so, it's your diff, and that's completely normal.

FogCityM3 · 08-03-2012, 11:39 PM

Happens in my car as well.

atruelunatic · 08-04-2012, 02:07 AM

Do you get it in 3rd gear around 2-3k RPM?

RoundTwo · 08-04-2012, 07:18 AM

It's happening in most gears when coasting, so yeah I would imagine 2-3k RPM range.

I question that it's my diff, because I never noticed this sound before. It's bothering me because it's like the engine braking doesn't sound smooth. It has this whir.

I have Hankook Ventus 285re and 265fr, and that could be the issue. I had my new wheels put on in April and really hadn't noticed it before that. The car is going to IND in a few days, so if they can't figure it out there, I'll be headed to the dealer once the car gets back.

Keep the thoughts comin guys.

X-ray man · 08-05-2012, 10:16 AM

Your not alone.

dmk08 · 08-06-2012, 07:42 AM

I had a similar noise which I thought was my diff. Ended up being a wheel bearing on my rear passenger side. Fixed at dealer under warranty and no noise since.

07-31-2012, 07:43 PM	#1
RoundTwo Riff Raff 31 Rep 368 Posts Drives: 2014 8 spd bicycle Join Date: Feb 2010 Location: Brooklyn, NY iTrader: (1) Garage List 2013 E92 M3 [0.00] 2004 325Ci [0.00]	Whirring noise under engine braking - Please chime in I've tried searching the forums and I cannot find anything exactly like what I am experiencing. The noise I'm trying to describe is only noticeable with a closed throttle and is louder at high speeds. (Think, coming off the highway on an offramp). It is a low pitch noise that drops in tone as you slow down. It could be something in the wheel well, like an unbalanced tire, or possibly something in the engine bay. The thing throwing me off is that there is no effect on ride quality and no shaking in the steering wheel, so that is why I am lead to believe that it isn't a tire issue. Anyone out there have any experience with this, or can possibly chime in on factors that may be attributing to this whirring? - Only previous incident I have had with the car was running over part of a shredded tire on the highway. It went under the center of the car. Thanks! Last edited by RoundTwo; 07-31-2012 at 07:52 PM..
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07-31-2012, 07:47 PM	#2
GIdriver Major 68 Rep 1,359 Posts Drives: 2014 E63 AMG-S Join Date: Dec 2010 Location: Somewhere in Time iTrader: (0)	Difficult with the info provided, at least for me. Can the sound by captured in a video? __________________ 2014 E63 AMG-S 2012 C63 AMG (P31) - gone 2011 E90 M3 FBO - gone
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07-31-2012, 07:56 PM	#3
RoundTwo Riff Raff 31 Rep 368 Posts Drives: 2014 8 spd bicycle Join Date: Feb 2010 Location: Brooklyn, NY iTrader: (1) Garage List 2013 E92 M3 [0.00] 2004 325Ci [0.00]	Possibly, may still not be audible enough to capture in the cockpit. The only thing I'm coming up with outside of this forum is a wheel bearing issue. Is that possible?
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07-31-2012, 07:59 PM	#4
Echo M3 Major 123 Rep 1,432 Posts Drives: E90 M3 Join Date: Sep 2009 Location: NY iTrader: (0)	Is it RPM-dependent? If so, it's your diff, and that's completely normal.
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08-03-2012, 11:39 PM	#5
FogCityM3 Colonel 499 Rep 2,400 Posts Drives: M3 (E90) & Porsche GT3 RS Join Date: Feb 2012 Location: San Francisco iTrader: (0)	Happens in my car as well.
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08-04-2012, 02:07 AM	#6
atruelunatic Lieutenant 96 Rep 473 Posts Drives: n/a Join Date: Jun 2011 Location: Seattle, WA iTrader: (1)	Do you get it in 3rd gear around 2-3k RPM? __________________ 2011 e92 JzB 6MT Akrapovic Evolution, ESS Tune, KW V3
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08-04-2012, 07:18 AM	#7
RoundTwo Riff Raff 31 Rep 368 Posts Drives: 2014 8 spd bicycle Join Date: Feb 2010 Location: Brooklyn, NY iTrader: (1) Garage List 2013 E92 M3 [0.00] 2004 325Ci [0.00]	It's happening in most gears when coasting, so yeah I would imagine 2-3k RPM range. I question that it's my diff, because I never noticed this sound before. It's bothering me because it's like the engine braking doesn't sound smooth. It has this whir. I have Hankook Ventus 285re and 265fr, and that could be the issue. I had my new wheels put on in April and really hadn't noticed it before that. The car is going to IND in a few days, so if they can't figure it out there, I'll be headed to the dealer once the car gets back. Keep the thoughts comin guys. Last edited by RoundTwo; 08-05-2012 at 05:09 PM..
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08-05-2012, 10:16 AM	#8
X-ray man Private 2 Rep 61 Posts Drives: 335i Join Date: Aug 2011 Location: East coast iTrader: (1)	Your not alone.
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08-06-2012, 07:42 AM	#9
dmk08 Gone Fishin’ 7318 Rep 12,125 Posts Drives: Walks Join Date: Jul 2012 Location: Atlanta iTrader: (19)	I had a similar noise which I thought was my diff. Ended up being a wheel bearing on my rear passenger side. Fixed at dealer under warranty and no noise since.
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