Whistling at 30mph in cold weather (228i) - Bimmerfest - BMW Forums



Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 1 Series & 2 Series > F22 / F23 2 Series (2014 - Current)

F22 / F23 2 Series (2014 - Current)
The 2 Series coupe is the replacement for the E82/E88 1 series coupe. Production starts in November 2013 on the 228i (N20) and M235i (N55) coupes. Look for them in dealerships in February 2014. The convertible F23 2 series will follow in the fall of 2014.

Reply
 
Thread Tools Display Modes
  #1  
Old 10-17-2017, 02:08 PM
sandrik93 sandrik93 is offline
Registered User
Location: San Antonio
 
Join Date: Oct 2017
Posts: 3
Mein Auto: 2016 228i
Whistling at 30mph in cold weather (228i)

Hi,
I have a whistling noise in the car every time its at 30mph. then till 33~34mph it pitches up and then disappears. Only happens in cold weather so below 18C. Dealership service has no clue what it is. I still can't figure out where it's coming from. Blowoff valve changed, still the same, so not that. Doesn't matter if on or off throttle as long as the speed is at 30. Fairly loud usually. Sound like the wind noise when something's not sealed properly but can't figure out what it might be. Windows up/down, AC on/off doesn't change anything. Any ideas?
Reply With Quote
Sponsored Links
Advertisement
 
  #2  
Old 10-18-2017, 09:31 AM
MSgtMel's Avatar
MSgtMel MSgtMel is offline
Familienwappen
Location: nicht zu hause
 
Join Date: Feb 2011
Posts: 890
Mein Auto: F23 M235xi, F25 X3 35xi
WAG, door, hood, trunk seals?
__________________

Wir koennen alles. Ausser Hochdeutsch
Reply With Quote
  #3  
Old 10-18-2017, 09:47 AM
sandrik93 sandrik93 is offline
Registered User
Location: San Antonio
 
Join Date: Oct 2017
Posts: 3
Mein Auto: 2016 228i
Maybe, not sure how to check that though. Got to record it this morning. Sounds like coming from the front but can't be sure. Doubt it's very helpful but here it is: https://vocaroo.com/i/s0IQA5z9QT5y
Reply With Quote
Sponsored Links
Advertisement
 
  #4  
Old 10-18-2017, 07:47 PM
MSgtMel's Avatar
MSgtMel MSgtMel is offline
Familienwappen
Location: nicht zu hause
 
Join Date: Feb 2011
Posts: 890
Mein Auto: F23 M235xi, F25 X3 35xi
Agree that it sounds like a whistle. But that would mean that it also should whistle in temps >62F (18C) with a corresponding increase in speed that would give the same air mass flow over the problem opening.

Current thoughts are that this is going to be a big headache in trying to track down even with the help of a physicist with experience in acoustics.

If there were some way to to create an air mass flow = 30mph @ 18C that was relatively small and quiet, then by trial and error you could move it around over the front end and hopefully find it. But, wow, that would most likely take a long time unless you got lucky.

Good luck in finding it. I know all too well how once you hear something not right you can't un-hear it until it's fixed and gone.
__________________

Wir koennen alles. Ausser Hochdeutsch
Reply With Quote
  #5  
Old 10-19-2017, 05:08 AM
Northwest240 Northwest240 is offline
Registered User
Location: Oregon
 
Join Date: Oct 2017
Posts: 26
Mein Auto: M240i
The only thing I can suggest is to have someone ride with you with a smart phone and a decibel meter app, listening around the cabin while you drive to see if that person can hear where it's coming from. A decibel meter, which you can usually get for free on iOS or Android, may be useful to find places in your car with consistently higher sound levels. I can't guarantee it will work, but it definitely sounds like a two-person job.
Reply With Quote
  #6  
Old 10-19-2017, 03:17 PM
sandrik93 sandrik93 is offline
Registered User
Location: San Antonio
 
Join Date: Oct 2017
Posts: 3
Mein Auto: 2016 228i
Quote:
Originally Posted by Northwest240 View Post
The only thing I can suggest is to have someone ride with you with a smart phone and a decibel meter app, listening around the cabin while you drive to see if that person can hear where it's coming from. A decibel meter, which you can usually get for free on iOS or Android, may be useful to find places in your car with consistently higher sound levels. I can't guarantee it will work, but it definitely sounds like a two-person job.
I'll try that. At least I have to figure out where it's coming from. I thought that since it's affected by temperature, might be the rubber contracting and letting air in. What, other than bonnet (hood) and moonroof(unlikely) can it be so I can tape the gaps one by one and test?

Thank you for ideas
Reply With Quote
  #7  
Old 11-13-2017, 08:44 AM
USA-RET's Avatar
USA-RET USA-RET is offline
Officially Welcomed to the 'Fest
Location: SW Florida
 
Join Date: Sep 2016
Posts: 381
Mein Auto: C7 Corvette Mini CooperF5
Quote:
Originally Posted by sandrik93 View Post
I'll try that. At least I have to figure out where it's coming from. I thought that since it's affected by temperature, might be the rubber contracting and letting air in. What, other than bonnet (hood) and moonroof(unlikely) can it be so I can tape the gaps one by one and test?

Thank you for ideas
The tape idea sounds reasonable as something can can do by yourself. I'd try the moon-roof first.

I have heard of guys who have replaced the stock mirror cap w/ the M style (wings), can get whistling sounds when driving. I assume you did not swap mirror caps.

Sounds like this could be a long process trying to run down that whistle.

This just came to me so I thought I'd add it. Window indexing may be off. After getting in your car, hit the up button for both windows and see if they "snug up". Had his in my Mini. Wind noise at different speeds.
__________________

Last edited by USA-RET; 11-22-2017 at 07:19 AM.
Reply With Quote
Reply

See More Related BMW Stories

Tags
228i, noise, whistle, whistling noise


Forum Navigation
Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 1 Series & 2 Series > F22 / F23 2 Series (2014 - Current)
Today's Posts Search
Thread Tools
Display Modes

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 On



Forum Jump


All times are GMT -7. The time now is 09:56 AM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
© 2001- VerticalScope Inc. All rights reserved.