BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read
Go Back   6Post.com | BMW 6-Series Forum > BMW 6 Series Forum > BMW M6 Forum (F12 / F13)

Post Reply
 
Thread Tools Search this Thread
      09-02-2014, 12:11 AM   #1
ChrisM6GC
Private
23
Rep
60
Posts

Drives: M6 GC
Join Date: Aug 2014
Location: Los Angeles

iTrader: (0)

New Member 14 M6 GC- weird "bird-chirping" sound from mid section???

Hi All,

Long time lurker here, 4 time BMW owner (330i, x5, m3, now m6GC).

Hoping you all can chime in / help. My car (14 M6 GC with comp pkg) is still under break in ~950 miles on the clock and just recently the car has developed this very strange noise on acceleration and deceleration but only when the engine/drivetrain is cold. Also happens during revs in neutral. I can only describe this sound as "birds chirping" and it seems to be coming from under the front driver and passenger section of the car (ie mid section). Since this noise only happens during warm up (completely goes away once car is at operating temp) I am guessing it's a faulty gasket of some sort in the exhaust system?

Video attached.

Also taking the car in tomorrow morning to Beverly Hills BMW. Interested to hear your thoughts...please chime in if anyone has had a similar experience. Car is 100 percent stock.



Cheers!

Last edited by ChrisM6GC; 09-02-2014 at 12:33 AM.. Reason: Video now attached!
Appreciate 1
Acexxon638.00
      09-02-2014, 04:38 AM   #2
RichardP
Lieutenant
United Kingdom
51
Rep
591
Posts

Drives: E39 M5 & M6 Gran Coupe
Join Date: Feb 2011
Location: North Yorkshire, UK

iTrader: (0)

Garage List
2013 BMW M6 Gran Coupe  [10.00]
1980 E26  [10.00]
2003 BMW M5  [10.00]
Sounds more like a bearing noise to me rather than blowing exhaust.
Appreciate 0
      09-02-2014, 08:35 AM   #3
bigbrian
riding on rails
bigbrian's Avatar
United_States
117
Rep
655
Posts

Drives: 2o13 m6 f13
Join Date: Apr 2014
Location: wichita kansas

iTrader: (0)

Let us know what you find out from the dealership. I had a similar noise (wasn't as loud). We put it up on the lift at BMW as it seemed to be coming from inside the exhaust (was not anything mechanical squeaking/rubbing). We kinda blew it off as nothing too important but it wasn't as loud as yours but similar. I am not sure if it's still there as I have not noticed it lately. Keep us posted though. Thanks!

Brian
Appreciate 0
      09-02-2014, 09:32 AM   #4
Palomequet
Captain
157
Rep
840
Posts

Drives: BMW F10 M5
Join Date: Mar 2014
Location: Abroad

iTrader: (2)

Garage List
IMO

It is absolutely in the exhaust system, the metal when gets hot expands and the sound disappear. Make the dealer check it starting from the cats down to the mufflers and replace as many parts of it until the sound vanish. Good luck and enjoy.
Appreciate 0
      09-02-2014, 11:33 AM   #5
M6-Coupe
Major General
M6-Coupe's Avatar
1125
Rep
6,064
Posts

Drives: F92 M8
Join Date: Feb 2014
Location: Bay area

iTrader: (0)

It's definitely exhaust. Either the valve or something else inside the exhaust.
I know a guy had dealer his exhaust replaced!
__________________
Current : 2020 F92 Black Sapphire M8 - ZF8
Gone : 2018 F80 Mineral Gray M3 - 6MT
Gone : 2016 F82 Austin Yellow M4 - 6MT
Gone : 2013 F13 Sakhir Orange M6 -7DCT
Gone: 2013 F13 Alpine White 650i -ZF8
Appreciate 0
      09-02-2014, 01:07 PM   #6
bigbrian
riding on rails
bigbrian's Avatar
United_States
117
Rep
655
Posts

Drives: 2o13 m6 f13
Join Date: Apr 2014
Location: wichita kansas

iTrader: (0)

Interestingly enough the sound in mine started when I had the OEM downpipes swapped out with the catless DPs (at least that is when I noticed it). Your sound is DEFINITELY louder than mine but it's the same "bird chirping sound" and the sound would come into play on mine when I revved it.

I am really interested to know what solution your dealership comes up with because I am going to re-visit my car to see if the sound is still there.

Brian
__________________
/// 2o13 m6 f13 . jb4 tuned . meth injected . msr intake . 21" adv1 wheels . eisenmann race w/ catless DPs . vorsteiner full aero . accuair e-level w/ bagged KW V3 struts . dinan sways . bel stir+ w/ alp jammer . jl audio subs
/// 2o13 x5m e70 . velos tuned . 22" adv1 wheels . dropped on kw variant3 coilovers . passport 9500ci radar & jammer. gets groceries fast
Appreciate 0
      09-03-2014, 12:55 AM   #7
ChrisM6GC
Private
23
Rep
60
Posts

Drives: M6 GC
Join Date: Aug 2014
Location: Los Angeles

iTrader: (0)

Thanks guys for the feedback, really appreciate it.

I dropped off the car this morning, explained what was happening, took the BMW tech on a ride along and then provided the vid. Service rep and BMW tech were both very cool and detailed so I am hoping for a good outcome. Also getting my break in service taking care of in parallel albeit a bit early (950miles).

Will definitely keep you guys posted.


Cheers!
Appreciate 0
      09-20-2014, 02:35 PM   #8
ChrisM6GC
Private
23
Rep
60
Posts

Drives: M6 GC
Join Date: Aug 2014
Location: Los Angeles

iTrader: (0)

Hi Guys,


Hope everyone is having a great weekend. Just giving everyone an update. After leaving my car at Beverly Hills BMW for 2 weeks (which ended up being ok because I was traveling during that time), I finally picked up my car.

Cause for the rattling/chirping noise on cold start was Exhaust Flange Gaskets (leaking), so the tech remove the exhaust system and replaces the gaskets throughout. Problem solved. He had to special order parts, etc hence the delay but otherwise all is well and good. It should be noted that my service adviser, Will Rodriguez was extremely helpful and just great guy overall, even allowed me to go into the shop and tour around, see my car, meet the shop foreman, etc.

One errant thing, when I got my car back there was a sizable gash in the front tire. Will is doing his best to get it replaced by the dealer, otherwise all is well and good.

Hope this helps anyone else that may have a similar problem.


Cheers,

Chris
Appreciate 0
      09-20-2014, 05:43 PM   #9
Roadrage
Second Lieutenant
34
Rep
273
Posts

Drives: M6 GC
Join Date: Feb 2014
Location: virginia

iTrader: (0)

Great news glad you were able to get your problem resolved.
__________________
2014 M6 Gran Coupe, Strasse Forged 22", AMS DP, H&R Springs, Vorsteiner Carbon Aero Lip, IND body parts, side markers, carbon mirrors and spoiler, carbon diffuser.
Appreciate 0
      09-22-2014, 10:58 AM   #10
C5driver
Major
C5driver's Avatar
3469
Rep
1,125
Posts

Drives: 55...just kidding.
Join Date: Sep 2014
Location: 33.6167° N, 117.8975° W

iTrader: (0)

Very helpful information. Thanks.
Appreciate 0
      09-25-2014, 08:47 PM   #11
CalifBrit
Private
United_States
6
Rep
66
Posts

Drives: 15 M6 MT Gran Coupe, Comp pkg
Join Date: Mar 2014
Location: Walnut Creek, California. South London exile.

iTrader: (0)

Chris. Thanks for the information. That did not sound too good. Glad you got it resolved.
Appreciate 0
      11-22-2016, 01:10 PM   #12
Acexxon
Captain
638
Rep
665
Posts

Drives: 2016 F06 M6 F87 M2
Join Date: Feb 2016
Location: CAN

iTrader: (0)

Thank you for the great info, I just starting to hear this noise from my car too, only near the left driver side. Our local dealers are really bad... they still couldn't identify the problem, maybe this is the same thing, I will ask them to check the exhaust flange gasket and hopefully it will solve the problem!!
Appreciate 0
      11-24-2016, 11:38 PM   #13
Dr Thrillride
Major
Canada
1382
Rep
1,050
Posts

Drives: 2022 M8cs
Join Date: May 2016
Location: Canada

iTrader: (0)

Garage List
Quote:
Originally Posted by Acexxon View Post
Thank you for the great info, I just starting to hear this noise from my car too, only near the left driver side. Our local dealers are really bad... they still couldn't identify the problem, maybe this is the same thing, I will ask them to check the exhaust flange gasket and hopefully it will solve the problem!!
Where are you in Canada friend?
Appreciate 0
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 06:28 AM.




6post.com
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, 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