BMW 1 Series Coupe Forum / 1 Series Convertible Forum (1M / tii / 135i / 128i / Coupe / Cabrio / Hatchback) (BMW E82 E88 128i 130i 135i)
 





 

Post Reply
 
Thread Tools Search this Thread
      09-20-2018, 06:39 PM   #1
JPuehl
Lieutenant
JPuehl's Avatar
101
Rep
413
Posts

Drives: 2011 135i N55 DCT
Join Date: Mar 2015
Location: Greater Seattle area

iTrader: (0)

A whistling sound, could it be a boost leak?

I get an odd whistling sound when I give it heavy throttle from low rpm's for a second or two. The sound is like if you lightly put your tongue at the roof of your mouth and whistled. I noticed it mostly after I changed the intercooler. I changed the CP after the intercooler and the sound is the same. My boost is really good and the sound goes away quickly. It reminds me of the sound the turbo would make spooling up. It's possible it's the sound of the turbo spooling because I added more volume with the bigger intercooler and it doesn't make the sound at higher boost levels, just when starting with almost no boost.
__________________
Jim
2011 135i DCT - FBO PS2


1Mpostr
Appreciate 0
      09-20-2018, 11:05 PM   #2
1smokehouse
Second Lieutenant
1smokehouse's Avatar
Guam
138
Rep
253
Posts

Drives: 2013 128i LE
Join Date: Feb 2015
Location: Guam

iTrader: (0)

Garage List
Sounds like a small boost leak somewhere. I know when I replaced my CP to the AFE aluminum one, there wasn't an o-ring in the kit to replace the old one that fit properly, so I get a bit of a whistle under full boost.
__________________
// '13 BSM 128i Limited Edition //
Appreciate 0
      09-24-2018, 12:47 PM   #3
JPuehl
Lieutenant
JPuehl's Avatar
101
Rep
413
Posts

Drives: 2011 135i N55 DCT
Join Date: Mar 2015
Location: Greater Seattle area

iTrader: (0)

Quote:
Originally Posted by 1smokehouse View Post
Sounds like a small boost leak somewhere. I know when I replaced my CP to the AFE aluminum one, there wasn't an o-ring in the kit to replace the old one that fit properly, so I get a bit of a whistle under full boost.
Thanks for the response. I get the whistle when the turbo is spooling up from almost no boost. I'm kind of thinking since it just started after the FMIC install and the whistle only lasts a second or 2 that the whistle is the turbo quickly spooling to "fill" the added volume of the new FMIC.
__________________
Jim
2011 135i DCT - FBO PS2


1Mpostr
Appreciate 0
      09-24-2018, 01:28 PM   #4
ShocknAwe
1Addict
ShocknAwe's Avatar
3197
Rep
7,859
Posts

Drives: E82 Mutt, M57 Truck
Join Date: Jul 2012
Location: Charleston

iTrader: (22)

Do a log. Check your wgdc. Leak will push that value up.

On your FMIC install... Did you use T bolt clamps? The answer should be YES. If no, order some and make sure they are tight.
__________________
2010 135i 6MT Jet Black
N54/3 FE82 Mutt | BUILD THREAD | GARAGE SALE
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 05:58 AM.




1addicts
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