E90Post
 


GetBMWParts
 
BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > AR downpipes, pronounced whistling / hissing noise accelerating at 75+mph?



Reply
 
Thread Tools Search this Thread
      02-03-2012, 08:06 PM   #45
cable96
Private First Class
2
Rep
187
Posts

 
Drives: threethreefive
Join Date: Oct 2009
Location: USA

iTrader: (5)

nope no rattling at all (only during cold starts), basically its a hissing sound that starts off low then as you speed up it becomes more audible. exactly how video 3 sounds.
Appreciate 0
      02-03-2012, 08:20 PM   #46
335iSSA
Captain
Poland
8
Rep
603
Posts

 
Drives: 07' E92 335i
Join Date: Nov 2009
Location: Frederick, MD

iTrader: (10)

Quote:
Originally Posted by cable96 View Post
nope no rattling at all (only during cold starts), basically its a hissing sound that starts off low then as you speed up it becomes more audible. exactly how video 3 sounds.
This is the same symptom I had. If I changed to a higher boost pressure map it got worse (more audible) than on the stock map. Again I had no under boost codes and WG DC was normal. Worth a look and if you can do it yourself the o-ring was $8. I dealt with it for more than a year so it caused no performance issues.
Appreciate 0
      02-03-2012, 08:49 PM   #47
cable96
Private First Class
2
Rep
187
Posts

 
Drives: threethreefive
Join Date: Oct 2009
Location: USA

iTrader: (5)

After looking up that part number it looks like it's located on the passenger side charge induction, i had that piece removed when i installed my Helix FMIC about a year ago so we can X out that possibility. the hissing only came about when the dps were installed, hopefully its a simple fix (if infact an issue).
Appreciate 0
      02-04-2012, 08:27 AM   #48
joed1
ED RN
joed1's Avatar
5
Rep
394
Posts

 
Drives: 2009 335xi coupe/2011 X3
Join Date: Jul 2009
Location: CT

iTrader: (0)

OP, 12/10 first post. I trust you have ruled out any gasket failure (exhaust leak). Have you bought this to a AR installer for a recheck?
Appreciate 0
      02-04-2012, 11:06 AM   #49
cable96
Private First Class
2
Rep
187
Posts

 
Drives: threethreefive
Join Date: Oct 2009
Location: USA

iTrader: (5)

have sched an appointment, waiting on some parts to come in before going back but wanted to get a prelim feedback before needing to do so.
Appreciate 0
      02-04-2012, 11:38 AM   #50
skim7x
Use it or Lose it
skim7x's Avatar
United_States
45
Rep
2,462
Posts

 
Drives: 335i e92
Join Date: Sep 2006
Location: Clifton, NJ

iTrader: (4)

Garage List
2007 335i  [5.00]
Quote:
Originally Posted by cable96 View Post
have sched an appointment, waiting on some parts to come in before going back but wanted to get a prelim feedback before needing to do so.
Awesome... please let us know... I thought it was wastegate rattling, but if it's not, it'd be good to know. Thanks!
__________________
'07 Space Gray 335i coupe w/ Sports Package | Comfort Access

Cobb S1+ | PTF e30 custom tune | AMS | CP-e | BMS OCC | Quaife
[Newark Photoshoot #1]
Appreciate 0
      02-04-2012, 03:27 PM   #51
zzster929
New Member
0
Rep
7
Posts

 
Drives: '09 335i
Join Date: Apr 2010
Location: Allen, Tx

iTrader: (0)

Hey man,
I've been following this post bc I got a helix intercooler and a ar dp during thanks giving n I had it Just installed yest n no hissing sound. Wanted to let u know. However I haven't installed jb4 yet. I wanted to see how the car responded first.
Appreciate 0
      03-22-2012, 11:23 AM   #52
dbudh001
Lieutenant
6
Rep
492
Posts

 
Drives: 2007 bmw 3351
Join Date: May 2010
Location: miami

iTrader: (1)

any updates ?

this post just stopped when it was getting interesting?

any updates ?
Appreciate 0
      03-22-2012, 01:07 PM   #53
cable96
Private First Class
2
Rep
187
Posts

 
Drives: threethreefive
Join Date: Oct 2009
Location: USA

iTrader: (5)

Went to 2 different shops to get it checked out

First shop stated there were no leaks but noticed that the vbands were loose so they retightened it, gaskets were fine, no carbon deposits.

Drove it around, same sound as before.

Went to a 2nd shop to get another opinion and the same thing, but they stated that the vbands were still loose so they retightened as well.

Drove around and now my cars even louder than before with the hissing, and sometimes i get a very very feint howling sound. .

Im guessing the Vbands are the culprit.. if i get them replaced it'll end up costing me more .
Appreciate 0
      03-22-2012, 03:57 PM   #54
08-335
Second Lieutenant
6
Rep
218
Posts

 
Drives: 2008 BMW 335i coupe
Join Date: Nov 2011
Location: Chicago, IL

iTrader: (0)

Honestly man, my car sounds the same and i think it sounds really really bad ass. Its your turbos spooling up!

Also, I hate this thread because it makes me paranoid that something is wrong with my car!
__________________
2008 BMW 335i e92-Agency Power DP's, Cobb stage 2, BMS DCI, BMW Performance Wheels
-Previously Owned-
2005 Volvo S60R (SOLD)-3.5" downpipe, 3" straight pipe all the way out, IPD custom tune, IPD Intake, AEM Methanol Injection Kit, Bell Intercooler, custom 4-guage piller pod.....best 1/4: 12.9 @ 111
Appreciate 0
      03-22-2012, 07:32 PM   #55
gboop
Second Lieutenant
Canada
2
Rep
260
Posts

 
Drives: 335i
Join Date: Sep 2010
Location: GTA

iTrader: (1)

I vote wastegate rattle!

I had very similar noise. Removed the AR downpipes, had turbos replaced. Now with stock downpipes, I can still hear it very faintly on quiet (no wind) days bouncing against walls etc. I am certain it will get greatly amplified if I put CL DP back on.

Based on all research and input from techs, it's loose wastegates. I couldn't stand the noise and just gave up. Would be great if you figure out that it's actually something else.

One other test you can do is a video of reving the car from 3500 rpm down while parked after some spirited driving (don't restart the car because the wastegate actutator will readjust). You should hear the signature trademark wastegate flutter.
__________________
Stage 123| DCI | ETS FMIC
Appreciate 0
      03-23-2012, 08:53 AM   #56
skim7x
Use it or Lose it
skim7x's Avatar
United_States
45
Rep
2,462
Posts

 
Drives: 335i e92
Join Date: Sep 2006
Location: Clifton, NJ

iTrader: (4)

Garage List
2007 335i  [5.00]
Quote:
Originally Posted by 08-335 View Post
Honestly man, my car sounds the same and i think it sounds really really bad ass. Its your turbos spooling up!

Also, I hate this thread because it makes me paranoid that something is wrong with my car!
Lol, you're not talking about the same sounds then... This sounds is NOT the turbos spooling up and does NOT sound bad ass.

I had this sound, had new turbos installed, and still had the noise, so maybe it's unavoidable. Although when i installed Cobb, the sounds is about 90% reduced.
__________________
'07 Space Gray 335i coupe w/ Sports Package | Comfort Access

Cobb S1+ | PTF e30 custom tune | AMS | CP-e | BMS OCC | Quaife
[Newark Photoshoot #1]
Appreciate 0
      04-01-2012, 01:12 PM   #57
MRE1986
New Member
MRE1986's Avatar
0
Rep
7
Posts

 
Drives: 335xi
Join Date: Aug 2011
Location: buffalo ny

iTrader: (0)

FYI I used AR designs gaskets and they were good for a day. They blew apart in about 1000 miles. They are just the paper ones. Next time I will use BMWs metal crush ring ones.
__________________
AR Catless DP AFE intake Custom Tune Cobb.
384 Wheel HP 465 FT LBS of Torque
Appreciate 0
      08-04-2012, 07:01 PM   #58
doraemon
Private
United_States
1
Rep
68
Posts

 
Drives: 2008 E90 335i JB4
Join Date: Feb 2011
Location: California

iTrader: (0)

Garage List
Send a message via MSN to doraemon Send a message via Skype™ to doraemon
Just got my JB4 and AR downpipe installed today, and I am getting the same kind of sound, I am assuming is normal.
Appreciate 0
      08-04-2012, 10:32 PM   #59
12beat
Second Lieutenant
12beat's Avatar
3
Rep
248
Posts

 
Drives: it's nice
Join Date: Jul 2012
Location: 2 cars ahead of you

iTrader: (2)

Normal.
Appreciate 0
      08-05-2012, 06:39 PM   #60
Ilma
Colonel
29
Rep
2,570
Posts

 
Drives: BMW
Join Date: Nov 2008
Location: hometown

iTrader: (0)

I also have the exact same sound after installing AR downpipes.

My mechanic forewarned me that I would get more wastegate rattle after downpipe install and IMHO that is exactly what this noise is.

The wastegates are rattling so fast it almost sounds like continuous round of machine gun fire.....or hissing as has been described here.

But there is no mistaking the metallic note to this sound, so metal is hitting metal here.
__________________
Sticky is an idiot
Appreciate 0
      10-31-2012, 08:36 AM   #61
cable96
Private First Class
2
Rep
187
Posts

 
Drives: threethreefive
Join Date: Oct 2009
Location: USA

iTrader: (5)

update..

After 7+ mo. since my last post, the whistling / hissing sound is even worse, super loud. My car literally sounds like a metro bus leaving a stop. Feint howling / siren noise still present upon acceleration at partial throttle. The police siren isnt obnoxiously loud but i can def here it in the cabin while the windows are up especially driving up my parking garage ramp since the sound bounces off the side walls.

Will need to bring it to a shop AGAIN and see if theres anything that could be done. I know most of you guys think this is normal but i can assure you that it isnt after comparing it with other peoples cars with the same setup. Very irritating to say the least.

It could be that the v clamps came loose after sometime, but tightening them didnt really solve the problem, as previously posted. Will letcha know when i find time to get them checked out.

Last edited by cable96; 10-31-2012 at 10:02 AM.
Appreciate 0
      10-31-2012, 11:50 AM   #62
ihc95
Major
ihc95's Avatar
12
Rep
1,166
Posts

 
Drives: TiAg E92 335i
Join Date: Jul 2011
Location: NJ

iTrader: (1)

Garage List
Keep us updated. I'm planning on getting AR DPs in the spring.
Appreciate 0
      10-31-2012, 01:33 PM   #63
Tiago@VRSF
BimmerPost Supporting Vendor
Tiago@VRSF's Avatar
United_States
108
Rep
7,574
Posts


 
Drives: E92 335i, F30 328i, F82 M4
Join Date: Dec 2007
Location: Hudson, MA

iTrader: (95)

Garage List
Send a message via AIM to Tiago@VRSF
The OEM gaskets at the turbo could be worn. Clamps loosening up will also cause a gasket to blow pre-maturely if there isn't enough pressure between the two surfaces to seal.

The OEM clamp part number have been replaced a couple times so if you're having trouble with them loosening up, they could be defective/worn. If the inner surface of the v-band stretches too much you won't be able to create enough pressure for a constant seal.
Appreciate 0
      10-31-2012, 01:37 PM   #64
cable96
Private First Class
2
Rep
187
Posts

 
Drives: threethreefive
Join Date: Oct 2009
Location: USA

iTrader: (5)

Thanks for your reply, back when i checked the dps, the gaskets were fine, no signs of wear or tear or carbon deposits, i had brought an extra set just incase and they stated it needed no replacement, ill definitely have the shop take a look again when i bring it in.
Appreciate 0
      10-31-2012, 01:50 PM   #65
Tiago@VRSF
BimmerPost Supporting Vendor
Tiago@VRSF's Avatar
United_States
108
Rep
7,574
Posts


 
Drives: E92 335i, F30 328i, F82 M4
Join Date: Dec 2007
Location: Hudson, MA

iTrader: (95)

Garage List
Send a message via AIM to Tiago@VRSF
It's really difficult to check for carbon deposits unless the DP's are removed since there's limited vision of the upper half of the pipes.
Appreciate 0
      10-31-2012, 02:27 PM   #66
cable96
Private First Class
2
Rep
187
Posts

 
Drives: threethreefive
Join Date: Oct 2009
Location: USA

iTrader: (5)

yep, totally aware of that, the shop had removed them and checked both the gaskets and the dps, and the outside part was fine and hadnt started flaking either. By now i wouldnt be surprised if they are a mess.
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
Forum Jump


All times are GMT -5. The time now is 05:08 PM.




e90post
Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
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