Welcome to Bimmerfest -- The #1 Online Community for BMW related information! Please enjoy the discussion forums below and share your experiences with the 200,000 current, new and past BMW owners. The forums are broken out by car model and into other special interest sections such as BMW European Delivery and a special forum to voice your questions to the many BMW dealers on the site to assist our members!

Please follow the links below to help get you started!

Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 3 Series / 4 Series > E90/E91/E92/E93 (2006 - 2013)

E90/E91/E92/E93 (2006 - 2013)
The E9X is the 4th evolution of the BMW 3 series including a highly tuned twin turbo 335i variant pushing out 300hp and 300 ft. lbs. of torque. BMW continues to show that it sets the bar for true driving performance! -- View the E9X Wiki

Reply
 
Thread Tools Display Modes
  #1  
Old 06-03-2014, 07:12 PM
toksis toksis is offline
Registered User
Location: Auckland
 
Join Date: Jun 2014
Posts: 28
Mein Auto: 320i 2006
Weird Low Frequency Rumbling Sound at 30 to 40 kph.

Hi,

I had bought a BMW imported from japan. It is a 2006 320i. I just notice that there is a weird sound rumbling sound. It is like a bass sound wob wob wob. Like a big boat when I run between 30 to 40 kilometers per hour. Is this a normal thing? I'm driving the car on a smooth road.

Reply With Quote
Ads by Google
  #2  
Old 06-03-2014, 07:28 PM
wilt wilt is offline
Officially Welcomed to the 'Fest
Location: SF Bay area
 
Join Date: Jan 2014
Posts: 688
Mein Auto: 2011 328i
It could be low frequency rumble indicating wheel bearing(s) starting to go bad.

When you hear the rumble, try putting the car in neutral and letting engine RPM drop to idle, with the car continuing to roll, and see if the rumble continues in spite of transmission being out of gear and engine at idle. It is possible for a mechanic to put the car on a lift, rotate each wheel by hand and FEEL any roughness in a wheel bearing that is going bad. Two bad wheel bearings can set up a 'beat frequency' and make the wob-wob-wob effect. I once had a low frequency rumble at slow speeds during turns, and the dealer found I was right about wheel bearings in the process of going bad.

Last edited by wilt; 06-03-2014 at 07:32 PM.
Reply With Quote
  #3  
Old 06-03-2014, 07:32 PM
dmatre dmatre is offline
Officially Welcomed to the 'Fest
Location: was CLT, now LAX
 
Join Date: Sep 2011
Posts: 154
Mein Auto: 2011 E90 328i
More likely the tires are worn & feathered. I've had tires that were so loud that I've changed them with more than 1/2 tread left.




Sent from BimmerApp mobile app
Reply With Quote
  #4  
Old 06-03-2014, 08:27 PM
toksis toksis is offline
Registered User
Location: Auckland
 
Join Date: Jun 2014
Posts: 28
Mein Auto: 320i 2006
I will update you guys. I will try to do a neutral when speed will be at 40kph. Thank you.
Reply With Quote
  #5  
Old 06-03-2014, 11:24 PM
toksis toksis is offline
Registered User
Location: Auckland
 
Join Date: Jun 2014
Posts: 28
Mein Auto: 320i 2006
Hello guys,

I run the car now and then went to 40kph speed then set the Transmission to neutral. Rumbling is still their. What would be the problem?
Reply With Quote
  #6  
Old 06-04-2014, 03:37 AM
CALWATERBOY DUE's Avatar
CALWATERBOY DUE CALWATERBOY DUE is online now
Reregistered User
Location: Fog City, California
 
Join Date: May 2014
Posts: 907
Mein Auto: 09 E93 335i somewhat mod
Quote:
Originally Posted by toksis View Post
Hello guys,

I run the car now and then went to 40kph speed then set the Transmission to neutral. Rumbling is still their. What would be the problem?

Drivetrain and/or tires. Hard to tell exactly what from this end.
Reply With Quote
  #7  
Old 06-04-2014, 10:57 AM
wilt wilt is offline
Officially Welcomed to the 'Fest
Location: SF Bay area
 
Join Date: Jan 2014
Posts: 688
Mein Auto: 2011 328i
Try turning the car somewhat quickly to one side or the other, and increase noise in one direction is symptom of greater loading of the bearing in one direction.
Reply With Quote
  #8  
Old 06-06-2014, 07:04 PM
toksis toksis is offline
Registered User
Location: Auckland
 
Join Date: Jun 2014
Posts: 28
Mein Auto: 320i 2006
I will try that turn to the other side directly. Should the speed still 40kph?
Reply With Quote
  #9  
Old 06-06-2014, 08:30 PM
wilt wilt is offline
Officially Welcomed to the 'Fest
Location: SF Bay area
 
Join Date: Jan 2014
Posts: 688
Mein Auto: 2011 328i
Quote:
Originally Posted by toksis View Post
I will try that turn to the other side directly. Should the speed still 40kph?
The point is to try to start at the highest volume of sound while in straight line, unloaded state, then put load on one side (then the other) to see how load change affects the sound. Of course, doing so safely is important. If you can go to a large empty parking lot during the test antics, like sunrise on Sunday morning, great! No risk to others, lots of empty space for you to recover from being overly distracted conducting your test. The more clues you can provide the mechanic, the better that the trouble can be localized, diagnosed and properly fixed.

Last edited by wilt; 06-08-2014 at 07:01 AM.
Reply With Quote
  #10  
Old 06-06-2014, 10:56 PM
toksis toksis is offline
Registered User
Location: Auckland
 
Join Date: Jun 2014
Posts: 28
Mein Auto: 320i 2006
Hello,

I went to the dealer, and let him experience the sound. He told me that it is the tyre, I need to change the tyre after 10k. He also experience it on his A5 Audi.
Reply With Quote
  #11  
Old 06-06-2014, 11:52 PM
toksis toksis is offline
Registered User
Location: Auckland
 
Join Date: Jun 2014
Posts: 28
Mein Auto: 320i 2006
I will still try that advice wilt
Reply With Quote
  #12  
Old 06-07-2014, 12:32 AM
wilt wilt is offline
Officially Welcomed to the 'Fest
Location: SF Bay area
 
Join Date: Jan 2014
Posts: 688
Mein Auto: 2011 328i
To me, tire noise transfer is rather different than the metal-on-metal noise transfer of a bad bearing. Tire noise has a higher component of 'aural' (what you hear via air transfer, with windows rolled up vs. down). What is the calendar age of the tires (...see production date code)?
Reply With Quote
  #13  
Old 06-07-2014, 01:25 AM
toksis toksis is offline
Registered User
Location: Auckland
 
Join Date: Jun 2014
Posts: 28
Mein Auto: 320i 2006
For me, you can hear the noise when the windows is closed. So its Aural.

Back left DOT LMT4 A149 3108
Back right DOT LMT4 A1H9 3006


Front left DOT LMT4 A1H9 0310
Front right DOT LMT4 A1h9 0310

Thanks for replying.
Reply With Quote
  #14  
Old 06-07-2014, 05:13 PM
wilt wilt is offline
Officially Welcomed to the 'Fest
Location: SF Bay area
 
Join Date: Jan 2014
Posts: 688
Mein Auto: 2011 328i
One tire made in 2008, nearing what manufacturers say is replacement time. One made in 2006...8 years into its life, really ought to go into retirement. The 2010s are fine.
Department of Transportation recommends changing even new-looking tires once they hit 10 years old, and many manufacturers recommend swapping them out at six years old. Rubber deteriorates over time due to UV and environmental exposure and the result leaves tire structure brittle and more prone to failure...brittle rather than compliant...affects road noise production.

Last edited by wilt; 06-07-2014 at 05:17 PM.
Reply With Quote
  #15  
Old 06-07-2014, 10:09 PM
toksis toksis is offline
Registered User
Location: Auckland
 
Join Date: Jun 2014
Posts: 28
Mein Auto: 320i 2006
Thank you very much. I think i need to replace the tyres. Thank you.
Reply With Quote
  #16  
Old 06-08-2014, 04:25 AM
DSXMachina's Avatar
DSXMachina DSXMachina is offline
Non compos Mentos
Location: New Hampshire
 
Join Date: Dec 2007
Posts: 10,486
Mein Auto: 335i E92 TiAg 6MT ED
Award

You get the trophy for "Worst Video of All Time Demonstrating a Complaint About a Noise".

Truly awful. Surely you posted the wrong video, maybe the one where at midnight you were testing out your camera in a closet?

But yes, I agree, it's the tires.
Reply With Quote
  #17  
Old 06-08-2014, 06:13 PM
toksis toksis is offline
Registered User
Location: Auckland
 
Join Date: Jun 2014
Posts: 28
Mein Auto: 320i 2006
Did not focus on the video, I want you guys focus on the noise
Reply With Quote
Reply

Bookmarks

Tags
320i, bass, rumbling, sound


Forum Navigation
Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 3 Series / 4 Series > E90/E91/E92/E93 (2006 - 2013)
Today's Posts Search
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On



Forum Jump


All times are GMT -7. The time now is 07:19 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
© 2001-2011 performanceIX, Inc. All Rights Reserved .: guidelines .:. privacy .:. terms