E90Post
 


Extreme Powerhouse
 
BMW 3-Series (E90 E92) Forum > BMW E90/E92/E93 3-series General Forums > General E90 Sedan / E91 Wagon / E92 Coupe / E93 Cabrio > Whistling noise coming from rear of car? (VIDEO)



Reply
 
Thread Tools Search this Thread
      10-26-2012, 01:59 AM   #1
dav_e92
New Member
3
Rep
16
Posts

Drives: 2011 e92 335i BSM
Join Date: Sep 2012
Location: Toronto, Canada

iTrader: (0)

Whistling noise coming from rear of car? (VIDEO)

First off, hello everybody, I have been browsing this forum for a while but just joined recently as I picked up my e92 lci 335i. Great forum, very helpful!

Now my problem: I have a whistling noise coming from the rear of the car. I suspect it might be the muffler but I really have no idea. I can only hear it while inside the car and not outside. It sounds like very slight vacuum/whistle kind of noise that happens constantly at 25km/h. There is no relationship RPM/transmission at all, as I tried different variations of gears and RPM's and the noise persists just at around 25km/h constantly. This noise can also be heard as I start up the car. Also, as I get to higher RPM's, the noise will be more random. But the noise just happens constantly around at 25km/h.

Here's a video of the noise. If you turn up your volume you'll hear a little whistling noise at 0:04 seconds in.



I brought the car to the dealer and they thought that it was a muffler problem. They replaced the driver's side muffler, but I picked up my car today and the noise is still there .

I thought about trying the golf tee mod to see if the problem would go away, as this seems to be somewhat related.

What do you guys think?
Appreciate 0
      10-27-2012, 05:03 PM   #2
dav_e92
New Member
3
Rep
16
Posts

Drives: 2011 e92 335i BSM
Join Date: Sep 2012
Location: Toronto, Canada

iTrader: (0)

Anyone?
Appreciate 0
      10-27-2012, 05:16 PM   #3
smallseafishie
Colonel
109
Rep
2,017
Posts

Drives: AW 07 e92 335i + AW 11 X5 35d
Join Date: Jun 2007
Location: Atlanta GA

iTrader: (13)

Garage List
2007 E92 335i  [0.00]
blow off valve?
Appreciate 0
      10-27-2012, 07:23 PM   #4
dav_e92
New Member
3
Rep
16
Posts

Drives: 2011 e92 335i BSM
Join Date: Sep 2012
Location: Toronto, Canada

iTrader: (0)

I doubt that's the blow off valve as there's no relationship between the throttle and the noise. The only time I can make this noise on purpose is every time I pass 25km/h.
Appreciate 0
      10-27-2012, 07:29 PM   #5
edirtaynine
Major General
81
Rep
6,092
Posts

Drives: e92
Join Date: Mar 2011
Location: SoCal

iTrader: (0)

and the tips go woo wooo
__________________
e90post killed plastidip
Just say no to painted stock wheels

jm3as hooks it up
Appreciate 0
      10-30-2012, 12:15 PM   #6
dav_e92
New Member
3
Rep
16
Posts

Drives: 2011 e92 335i BSM
Join Date: Sep 2012
Location: Toronto, Canada

iTrader: (0)

Bump, anyone else have an idea of what might be causing the noise?
Appreciate 0
      10-30-2012, 12:34 PM   #7
galahad05
Brigadier General
galahad05's Avatar
158
Rep
3,158
Posts

Drives: '07 335i e90
Join Date: Mar 2008
Location: Long Island NY

iTrader: (0)

Honestly I couldn't hear it.
__________________
Always do right. This will gratify some people and astonish the rest.
--Mark Twain
Appreciate 0
      10-30-2012, 12:57 PM   #8
dav_e92
New Member
3
Rep
16
Posts

Drives: 2011 e92 335i BSM
Join Date: Sep 2012
Location: Toronto, Canada

iTrader: (0)

If you turn up your volume louder you'll hear a little whistle/vacuum sound like.. a "zew" sound at the end of 0:04 seconds. Hard to make out at first but once you hear it it's pretty obvious.
Appreciate 0
      10-30-2012, 08:40 PM   #9
galahad05
Brigadier General
galahad05's Avatar
158
Rep
3,158
Posts

Drives: '07 335i e90
Join Date: Mar 2008
Location: Long Island NY

iTrader: (0)

Okay, yeah I heard that.

Still don't know what it is though. Sounds vaguely like a turbo bypass valve running.

Ideally you'd do the ol' "mechanic's stethoscope" routine on it, to isolate where it's coming from. I take it you can't reproduce the sound revving the engine while parked?
__________________
Always do right. This will gratify some people and astonish the rest.
--Mark Twain
Appreciate 0
      10-30-2012, 09:09 PM   #10
VNeBLOB42
Lieutenant Colonel
VNeBLOB42's Avatar
United_States
50
Rep
1,677
Posts

Drives: 14' GMC Terrain SLT-2
Join Date: May 2011
Location: Folsom, Ca

iTrader: (0)

Garage List
007 335i E92  [7.66]
Quote:
Originally Posted by edirtaynine View Post
and the tips go woo wooo
^^^

Sounds like you have the bad case of the Woo Woo Tips

__________________

SOLD:: PTF Pro eTune by Dzenno / COBB S1+ E50
Alpina B3 Flash / ETS FMIC / ER CP / CPE DCI
Appreciate 0
      10-30-2012, 10:29 PM   #11
N55
ⒸⒺⓇⓉⓘⒻⒾⒺⒹ✬ⓃⒾⓃⒿⒶ
N55's Avatar
United_States
137
Rep
1,475
Posts

Drives: 🚀
Join Date: Nov 2010
Location: Pittsburgh

iTrader: (3)

Garage List
Flo Rida is in your trunk!!!
__________________
2008 335xi E90 - Sold - > 2011 335xi E90 - Sold - > 2012 335IS E92 Crimson Red - SOLD > 2015 M4 Yas Marina Blue SOLD> 2019 McLaren 570s SOLD 2015 Lamborghini Huracan

Appreciate 0
      10-30-2012, 11:16 PM   #12
will bleich
First Lieutenant
27
Rep
394
Posts

Drives: pos
Join Date: Sep 2012
Location: Pennslyvania

iTrader: (1)

sounds to me like you need some whistler tips and youll forget all about that noise

woooooo woooo

Appreciate 0
      10-31-2012, 02:44 AM   #13
dav_e92
New Member
3
Rep
16
Posts

Drives: 2011 e92 335i BSM
Join Date: Sep 2012
Location: Toronto, Canada

iTrader: (0)

That's the weird thing! I can't replicate the noise in any way whatsoever unless I hit around 20km/h. That's when I hear it every single time. I would say that at higher RPM's the noise comes on at random times too, but the weird thing is that when I hit 20km/h, I'd hear it every time . I have found no relationships with the RPM's or the shifting at all.

I'm thinking it might be either the muffler or the turbos causing this and since my dealer swapped out the muffler already, I take it as it's probably the turbos?

On another note... lmao.. I didn't get that joke until I watched that video.
Appreciate 0
      11-05-2012, 05:32 AM   #14
dav_e92
New Member
3
Rep
16
Posts

Drives: 2011 e92 335i BSM
Join Date: Sep 2012
Location: Toronto, Canada

iTrader: (0)

So I found the culprit of this noise. Just for the record if anybody experiences this noise also, it was the exhaust flap opening and closing. I did the golf tee mod and the noise was gone. Although I still doubt that this noise is normal as I haven't heard it in other 335i's that I've driven. Weird thing is though, my dealer swapped out the muffler and the noise did not go away. Anyhow, I love how my exhaust sounds with the golf tee mod now, especially those farts and burbles . Just a little bit of drone at low RPMs that I can live with.
Appreciate 0
      11-05-2012, 09:22 AM   #15
E90_boostjunky
Lieutenant Colonel
E90_boostjunky's Avatar
91
Rep
1,644
Posts

Drives: BMW 335I E90 SGM
Join Date: Dec 2011
Location: USA, IL

iTrader: (1)

Quote:
Originally Posted by Lowandslow115 View Post
sounds to me like you need some whistler tips and youll forget all about that noise

woooooo woooo

what the hell, haha at 1:51 he drives on the wrong side of the road, then blows a stop sign on video LOL
Appreciate 0
      11-05-2012, 05:22 PM   #16
will bleich
First Lieutenant
27
Rep
394
Posts

Drives: pos
Join Date: Sep 2012
Location: Pennslyvania

iTrader: (1)

Quote:
Originally Posted by E90_boostjunky View Post
what the hell, haha at 1:51 he drives on the wrong side of the road, then blows a stop sign on video LOL
hahahahahahahahah its so funny i hope to one day be as cool as bub rub
Appreciate 0
Reply

Bookmarks

Tags
exhaust, muffler, noise, rear, vacuum

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 03:38 AM.




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