BMW M3 Forum (E90 E92)

BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read


Go Back   M3Post - BMW M3 Forum > E90/E92 M3 Technical Topics > Engine, Transmission, Exhaust, Drivetrain, ECU Software Modifications
 
INDustry distribution
Post Reply
 
Thread Tools Search this Thread
      02-19-2020, 10:46 AM   #1
MentholGuy
MentholGuy's Avatar
United_States
174
Rep
1,497
Posts

Drives: 11 E90 M3
Join Date: Dec 2007
Location: S. Cal

iTrader: (12)

Rhythmical thumping sound under the car at idle

Hello guys,

My 2011 E90 M3 started making this weird sound recently.

You can hear the sound from this video, not the engine sound, but behind it.



I only can hear this sound and feel the very slight vibration at idle and is rhythmical.

Sounds like it's coming from spinning object, because it gets louder then quieter over and over but I don't hear it from the engine bay.

What could be? Mine is DCT by the way.

Please advise.

Thank you!
Appreciate 0
      02-19-2020, 10:57 AM   #2
tdott
Brigadier General
3327
Rep
3,528
Posts

Drives: M3
Join Date: Nov 2010
Location: South FL / 6ix

iTrader: (4)

Need to rev it a little.
Appreciate 0
      02-19-2020, 11:00 AM   #3
MentholGuy
MentholGuy's Avatar
United_States
174
Rep
1,497
Posts

Drives: 11 E90 M3
Join Date: Dec 2007
Location: S. Cal

iTrader: (12)

Quote:
Originally Posted by tdott View Post
Need to rev it a little.
Thanks! I will get that video later today, but as I remember, that sound goes away when I rev or drive.
Appreciate 0
      02-20-2020, 06:59 AM   #4
MentholGuy
MentholGuy's Avatar
United_States
174
Rep
1,497
Posts

Drives: 11 E90 M3
Join Date: Dec 2007
Location: S. Cal

iTrader: (12)

Quote:
Originally Posted by MentholGuy View Post
Quote:
Originally Posted by tdott View Post
Need to rev it a little.
Thanks! I will get that video later today, but as I remember, that sound goes away when I rev or drive.
Other video clip under the car with rev.

Thumping noise is like background music.



And this one is engine bay, that noise near the intake is normal?

Appreciate 0
      02-20-2020, 07:42 AM   #5
Helmsman
Major General
Helmsman's Avatar
Sweden
3608
Rep
6,567
Posts

Drives: 2011 AW E90 M3 ZCP
Join Date: Mar 2014
Location: Stockholm, Sweden

iTrader: (0)

Believe I have the same thump in the background, only hear at idle really. Think it always been there so hasn't worried me. You know for certain that it suddenly started, you didn't swop to a quiet exhaust system or so to start hearing it?
Appreciate 0
      02-20-2020, 07:54 AM   #6
MentholGuy
MentholGuy's Avatar
United_States
174
Rep
1,497
Posts

Drives: 11 E90 M3
Join Date: Dec 2007
Location: S. Cal

iTrader: (12)

Quote:
Originally Posted by Helmsman View Post
Believe I have the same thump in the background, only hear at idle really. Think it always been there so hasn't worried me. You know for certain that it suddenly started, you didn't swop to a quiet exhaust system or so to start hearing it?
I didn't really noticed this until recent, and have stock exhaust system (only resonator deleted).

I have changed engine and mission mounts recently though.

X-pipe leak could make this noise / vibration?
Appreciate 0
      02-20-2020, 09:04 AM   #7
Helmsman
Major General
Helmsman's Avatar
Sweden
3608
Rep
6,567
Posts

Drives: 2011 AW E90 M3 ZCP
Join Date: Mar 2014
Location: Stockholm, Sweden

iTrader: (0)

Quote:
Originally Posted by MentholGuy View Post
I didn't really noticed this until recent, and have stock exhaust system (only resonator deleted).

I have changed engine and mission mounts recently though.

X-pipe leak could make this noise / vibration?
Ouch, you lost previous engine?
Appreciate 0
      02-20-2020, 09:05 AM   #8
MentholGuy
MentholGuy's Avatar
United_States
174
Rep
1,497
Posts

Drives: 11 E90 M3
Join Date: Dec 2007
Location: S. Cal

iTrader: (12)

Quote:
Originally Posted by Helmsman View Post
Quote:
Originally Posted by MentholGuy View Post
I didn't really noticed this until recent, and have stock exhaust system (only resonator deleted).

I have changed engine and mission mounts recently though.

X-pipe leak could make this noise / vibration?
Ouch, you lost previous engine?
No haha, I meant engine mounts and mission mounts
Appreciate 0
      02-20-2020, 09:57 AM   #9
Helmsman
Major General
Helmsman's Avatar
Sweden
3608
Rep
6,567
Posts

Drives: 2011 AW E90 M3 ZCP
Join Date: Mar 2014
Location: Stockholm, Sweden

iTrader: (0)

Quote:
Originally Posted by MentholGuy View Post
No haha, I meant engine mounts and mission mounts
Puh, that sounds better!

Lets see what the other guys chime in with reg the noise.

Cheers

Ps. Took a quick clip. Can't say that I hear much, but will try to remember to take another one while colder:

Last edited by Helmsman; 02-20-2020 at 11:03 AM..
Appreciate 0
      01-04-2022, 02:13 PM   #10
E90FOUR
New Member
6
Rep
18
Posts

Drives: BMW M
Join Date: Sep 2021
Location: NJ

iTrader: (0)

Doesn't seem like the cause of this noise on a DCT car was ever identified, does anyone have any input on this?

Found another video with a similar noise from the interior (this one is 6MT, not DCT, but it's the same noise).



Thanks!
Appreciate 0
      01-16-2022, 03:42 PM   #11
E90FOUR
New Member
6
Rep
18
Posts

Drives: BMW M
Join Date: Sep 2021
Location: NJ

iTrader: (0)

Bump. Any ideas?
Appreciate 0
      01-17-2022, 12:09 PM   #12
JPSurratt2005
Private First Class
57
Rep
138
Posts

Drives: 2009 E92 M3 DCT
Join Date: Dec 2015
Location: Muskogee

iTrader: (1)

Quote:
Originally Posted by E90FOUR View Post
Bump. Any ideas?
Maybe something on the driveshaft? There's a center bearing that could cause an issue, and a trans to shaft connecting guibo. Maybe something is loose/worn there.
Appreciate 0
      01-17-2022, 01:03 PM   #13
Ajolives
Captain
599
Rep
744
Posts

Drives: E90 M3
Join Date: Mar 2019
Location: Tampa

iTrader: (0)

I have the same, per what I read I thinks it's the throw out bearing making that helicopter noise. Goes away when I engage the clutch.
Appreciate 1
DrFerry2744.00
      01-21-2022, 02:32 PM   #14
E90FOUR
New Member
6
Rep
18
Posts

Drives: BMW M
Join Date: Sep 2021
Location: NJ

iTrader: (0)

Thanks for the responses. Have not been able to get underneath yet to inspect, but can check those joints. Interestingly, it is not constant but periodic at relatively consistent intervals. If it were the shaft I would think it would be a constant whirring. Also, I primarily hear it in the cabin, doesnít seem to be present in engine bay or next to the car. It is relatively subtle, but present.

The sound does sound just like the helicopter noises of the TOB that Iíve heard. This is DCT though (does DCT have TOB or slave cylinder?).

Thanks!
Appreciate 0
      01-21-2022, 04:10 PM   #15
DrFerry
Field Marshal
DrFerry's Avatar
United_States
2744
Rep
793
Posts

Drives: '08 E92 M3
Join Date: Jul 2010
Location: Greenville, SC

iTrader: (0)

Garage List
2008 BMW M3  [0.00]
2015 BMW X5  [0.00]
Quote:
Originally Posted by E90FOUR View Post
Bump. Any ideas?
Long shot.... Wrong oil viscosity i.e. too thin. ? . The background thumping at idle sounds very similar to faint rod knock. IF the oil viscosity were too thin, then perhaps it might exacerbate low oil pressure at idle. Hence, faint rod knock being heard if the bearings are worn. Then as RPMs increase oil pressure increases and the faint rod knock disappears. Just my two cent theory.
__________________
'08 E92 M3 DCT Melbourne Red/Bamboo Beige Leather/EDC/HARROP Supercharger/SSP Spec-R DCT clutch discs/SSP Pro-Gold DCT Fluid/Quaife LSD/3:45 Final Drive by Diffs Online/BE Bearings & ARP Bolts/Vibra Technics Engine Mounts/M3 World HFC X-Pipe/Pipercross Air Filter/LUX H8 180/NGK Racing Iridium R2556B-9/BPM Sport Tune for Harrop SC/BPM Sport DCT Tune/PFC Z-Rated Pads/ECS Brass Brake Caliper Bushings/Alex Shop Solid Sub-frame Bushings/Motul 600/Tint/APEX SM-10 18X11 ET44 + 12mm Spacers/APEX 75mm Stud Kit/
Appreciate 2
      01-21-2022, 05:02 PM   #16
Ajolives
Captain
599
Rep
744
Posts

Drives: E90 M3
Join Date: Mar 2019
Location: Tampa

iTrader: (0)

Quote:
Originally Posted by DrFerry View Post
Quote:
Originally Posted by E90FOUR View Post
Bump. Any ideas?
Long shot.... Wrong oil viscosity i.e. too thin. ? . The background thumping at idle sounds very similar to faint rod knock. IF the oil viscosity were too thin, then perhaps it might exacerbate low oil pressure at idle. Hence, faint rod knock being heard if the bearings are worn. Then as RPMs increase oil pressure increases and the faint rod knock disappears. Just my two cent theory.
There goes my good night's sleep, lol.
Appreciate 1
DrFerry2744.00
      01-22-2022, 04:12 AM   #17
Helmsman
Major General
Helmsman's Avatar
Sweden
3608
Rep
6,567
Posts

Drives: 2011 AW E90 M3 ZCP
Join Date: Mar 2014
Location: Stockholm, Sweden

iTrader: (0)

Quote:
Originally Posted by Ajolives View Post
There goes my good night's sleep, lol.
Hahaha, mine too!
Appreciate 0
      01-22-2022, 08:20 PM   #18
Erickuokwa
Second Lieutenant
Erickuokwa's Avatar
270
Rep
266
Posts

Drives: E90 M3
Join Date: Apr 2017
Location: California Los Angeles

iTrader: (0)

I'm 6mt, I have that sound but when I press the clutch it goes away. How I keep check of unsure sounds over time is to see if the sound becomes irregularly louder or increasingly worse when I raise the rpm
Appreciate 0
      02-16-2022, 07:51 PM   #19
i.mc.m3
Registered
0
Rep
1
Posts

Drives: 2011 E90 M3
Join Date: Feb 2022
Location: FW, Tx

iTrader: (0)

Following this thread, I've been having the same noise for over a year now and can't find the cause. Does anyone have any updates on this issue and has it been resolved?
Appreciate 0
      02-17-2022, 02:04 AM   #20
jun_e92
Private First Class
jun_e92's Avatar
95
Rep
189
Posts

Drives: 2011 E92 M3 ZCP
Join Date: Dec 2018
Location: Bay Area, CA

iTrader: (2)

Rhythmical thumping sound under the car at idle

Quote:
Originally Posted by i.mc.m3 View Post
Following this thread, I've been having the same noise for over a year now and can't find the cause. Does anyone have any updates on this issue and has it been resolved?
The same voice has been heard for more than half a year, but in the cabin, the reason has not been found. This noise makes me not want to drive! Late last year, during a series of operations to replace the oil filter gasket, a bolt under the engine protection plate was found to be loose. Finally found a solution to this noise!
Appreciate 2
DrFerry2744.00
Post Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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 Off



All times are GMT -5. The time now is 09:24 AM.




m3post
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2022, vBulletin Solutions Inc.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST