E90Post
 


 
BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N55 Turbo Engine Tuning and Exhaust Modifications - 335i Tuning > Weird sound after install axle back exhaust ...



Reply
 
Thread Tools Search this Thread
      01-04-2011, 01:27 AM   #1
skate0518
First Lieutenant
United_States
57
Rep
349
Posts

Drives: E46-E85-E92-F82
Join Date: Feb 2010
Location: LA

iTrader: (2)

Weird sound after install axle back exhaust ...

Just weld an axle back exhaust onto my e92 N55 Lci But when driving speed over 20 miles, it start making a high pitch static noise. I can't figure out what is causing this sound. Anybody know what could be the problem & any way to fix ?
Appreciate 0
      01-04-2011, 11:21 AM   #2
Bodie217
Second Lieutenant
Bodie217's Avatar
90
Rep
252
Posts

Drives: '10 135i, '14 WRX, '14 Sequoia
Join Date: Dec 2008
Location: Denver, CO

iTrader: (1)

can you post a video or sound clip?

Only thing that comes to mind is a shotty weld causing turbulence or an exhaust leak.

I'd also say it could be packaging material inside the new exhaust piping, but I'd hope the installer would've checked the exhaust before installing
__________________
-2010 BMW 135i - Titanium Silver - Procede v3/ETS 5" IC/AR Catless DP>N54mid>Berk Race/BMS OCC/VRSF Turbo Inlets & CP/SP rotors/Pagid RS29/APEX ARC8/Ohlins DFV/M3 Full Suspension and Bushings/Wavetrac LSD // 395rwhp/469rwtq on 91oct
-2014 Toyota Sequoia Platinum - Overlander
Appreciate 0
      01-04-2011, 11:36 AM   #3
Forcefed3
Banned
No_Country
127
Rep
4,733
Posts

Drives: 2008 335i
Join Date: May 2010
Location: South

iTrader: (2)

Garage List
2008 335i  [1.00]
What kind? Post a video.
Appreciate 0
      01-04-2011, 11:42 AM   #4
Kevin@AKMotorwerk
General
Kevin@AKMotorwerk's Avatar
United_States
290
Rep
28,154
Posts

Drives: THE GUY YOU LOVE TO HATE
Join Date: Mar 2009
Location: hillsborough, nj

iTrader: (1)

exhaust leak, loose clamp, or the exhaust is hitting something and vibrating against it
Appreciate 0
      01-04-2011, 11:44 AM   #5
Forcefed3
Banned
No_Country
127
Rep
4,733
Posts

Drives: 2008 335i
Join Date: May 2010
Location: South

iTrader: (2)

Garage List
2008 335i  [1.00]
Quote:
Originally Posted by Kevin@AKMotorwerk View Post
exhaust leak, loose clamp, or the exhaust is hitting something and vibrating against it
+1
Thats all it could be really.
Appreciate 0
      01-04-2011, 02:36 PM   #6
skate0518
First Lieutenant
United_States
57
Rep
349
Posts

Drives: E46-E85-E92-F82
Join Date: Feb 2010
Location: LA

iTrader: (2)

THX guys , I think it might be exhaust leak ! I will go check it out and post video if i can.
Appreciate 0
      01-04-2011, 05:15 PM   #7
skate0518
First Lieutenant
United_States
57
Rep
349
Posts

Drives: E46-E85-E92-F82
Join Date: Feb 2010
Location: LA

iTrader: (2)

Just back from shop, they said the exhaust is fine and the weld is fine too. They said our car doesn't come with quality x pipe & no resonators, which is bad and suggest me to custom one .... but they have no idea what is causing the high pitch, like radio frequency type of annoying noise(the tone will vary depend on speed). Now after driving for 15 mins, i am having serious headache. That noise is killing me .... Where should i go and have some real "pro" to check out for me ?

Last edited by skate0518; 01-04-2011 at 05:23 PM..
Appreciate 0
      01-04-2011, 08:01 PM   #8
NiVeDh
Major General
NiVeDh's Avatar
United_States
420
Rep
8,004
Posts

Drives: '08 E90 335i, '99 E36 M3
Join Date: Apr 2009
Location: Houston, TX & Atlanta, GA

iTrader: (132)

Garage List
Check to make sure the exhaust isn't rubbing on anything, like the heat shielding material.
Appreciate 0
      01-04-2011, 08:15 PM   #9
skate0518
First Lieutenant
United_States
57
Rep
349
Posts

Drives: E46-E85-E92-F82
Join Date: Feb 2010
Location: LA

iTrader: (2)

Checked ... nth is rubbing or ticking ... only when rev up, it comes on ! won't notice it when stationary. Geez .... hope back to stock is not the "only" way ...
Appreciate 0
      01-04-2011, 11:05 PM   #10
Bodie217
Second Lieutenant
Bodie217's Avatar
90
Rep
252
Posts

Drives: '10 135i, '14 WRX, '14 Sequoia
Join Date: Dec 2008
Location: Denver, CO

iTrader: (1)

What axle back exhaust did you install?

Very shocking that the exhaust shop who did the work couldn't figure out what was making the noise...

Posting a video will help a lot.
__________________
-2010 BMW 135i - Titanium Silver - Procede v3/ETS 5" IC/AR Catless DP>N54mid>Berk Race/BMS OCC/VRSF Turbo Inlets & CP/SP rotors/Pagid RS29/APEX ARC8/Ohlins DFV/M3 Full Suspension and Bushings/Wavetrac LSD // 395rwhp/469rwtq on 91oct
-2014 Toyota Sequoia Platinum - Overlander
Appreciate 0
      01-04-2011, 11:09 PM   #11
Bodie217
Second Lieutenant
Bodie217's Avatar
90
Rep
252
Posts

Drives: '10 135i, '14 WRX, '14 Sequoia
Join Date: Dec 2008
Location: Denver, CO

iTrader: (1)

Does the high pitch noise sound like this?

__________________
-2010 BMW 135i - Titanium Silver - Procede v3/ETS 5" IC/AR Catless DP>N54mid>Berk Race/BMS OCC/VRSF Turbo Inlets & CP/SP rotors/Pagid RS29/APEX ARC8/Ohlins DFV/M3 Full Suspension and Bushings/Wavetrac LSD // 395rwhp/469rwtq on 91oct
-2014 Toyota Sequoia Platinum - Overlander
Appreciate 0
      01-05-2011, 04:22 AM   #12
skate0518
First Lieutenant
United_States
57
Rep
349
Posts

Drives: E46-E85-E92-F82
Join Date: Feb 2010
Location: LA

iTrader: (2)

no I am sure its not Turbo making that sound, its like the air flow that is causing it because when i hit it over 5k rpm, it actually went away but once the rpm drop around 2k-4k it comes up .... I will try video it TMR but not sure if camera can capture it.
Appreciate 0
      01-05-2011, 06:33 PM   #13
skate0518
First Lieutenant
United_States
57
Rep
349
Posts

Drives: E46-E85-E92-F82
Join Date: Feb 2010
Location: LA

iTrader: (2)




from 00:34 to the end that noise is clearly there ...
Appreciate 0
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 06:50 PM.




e90post
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