Welcome to Bimmerfest -- The #1 Online Community for BMW related information! Please enjoy the discussion forums below and share your experiences with the 200,000 current, new and past BMW owners. The forums are broken out by car model and into other special interest sections such as BMW European Delivery and a special forum to voice your questions to the many BMW dealers on the site to assist our members!

Please follow the links below to help get you started!

Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 5 Series > E39 (1997 - 2003)

E39 (1997 - 2003)
The BMW 5-Series (E39 chassis) was introduced in the United States as a 1997 model year car and lasted until the 2004 when the E60 chassis was released. The United States saw several variations including the 525i, 528i, 530i and 540i. -- View the E39 Wiki

Reply
 
Thread Tools Display Modes
  #1  
Old 11-11-2012, 06:33 PM
Psalm11_6 Psalm11_6 is offline
Registered User
Location: Kansas
 
Join Date: Oct 2012
Posts: 56
Mein Auto: 98 540iA Sport
Odd squeal coming from front, increases with acceleration

98 540iA has some odd squealing sound coming from what I believe to be the front under the hood, and I'm just not sure what the heck it is at this point. I've done a bit of searching on the forum, but nothing looks to be ringing a bell or matching the symptom.

Seems to be aggravated by the cold, not as likely to happen when warm out... Definitely not the brakes, much higher pitch than that (and I checked the pads as well as their backs to be sure this wasn't the culprit.

Once the car is fully warmed up, everything seems to be fine (not just engine temp, as it takes 5-10 miles or so after temp needle reaches 12 O'Clock). Only thing I can think of at this point is either something related to the drive shaft (?) or perhaps a wheel baring (though I don't know what that would sound like).

Is there anything common that I might have missed or any possible suggestions anyone might have? Difficult to narrow the dang thing down as I have to be moving to hear it and only REALLY hear it after 15-20mph and up :-(

Hope everyone had a decent weekend!
Reply With Quote
Ads by Google
  #2  
Old 11-11-2012, 06:42 PM
Psalm11_6 Psalm11_6 is offline
Registered User
Location: Kansas
 
Join Date: Oct 2012
Posts: 56
Mein Auto: 98 540iA Sport
Something I just realized I forgot to mention: while I thought it was likely unrelated, I turned the fan up a few notches, then all the way off - no noticeable change in squealing

Please forgive any grammatical errors, sent from mobile
Reply With Quote
  #3  
Old 11-14-2012, 02:21 PM
Psalm11_6 Psalm11_6 is offline
Registered User
Location: Kansas
 
Join Date: Oct 2012
Posts: 56
Mein Auto: 98 540iA Sport
Still trying to narrow this down... It's weird that it only happens in the cold. I'm getting to the point where I'm about to just replace the front brake pads anyway on the off chance this is what's doing it.

So far I only know it has to do with SOMETHING rotating as it only happens after getting under way lol
Reply With Quote
  #4  
Old 11-14-2012, 02:36 PM
johnstern's Avatar
johnstern johnstern is offline
Officially Welcomed to the 'Fest
Location: Cape Neddick, Maine
 
Join Date: Mar 2007
Posts: 633
Mein Auto: 2000 BMW 528iT/5, S/C
Could it be your serpentine or A/C belt? Perhaps one of the tensioners has worn out.
Reply With Quote
  #5  
Old 11-14-2012, 02:47 PM
Mikes530 Mikes530 is offline
Officially Welcomed to the 'Fest
Location: Toronto
 
Join Date: Mar 2011
Posts: 286
Mein Auto: 530
+1 on the belts and/or tensioners as the most common cause of squealing.

Is the noise engine speed or road speed related?
Reply With Quote
  #6  
Old 11-14-2012, 02:50 PM
Swat17 Swat17 is offline
Registered User
Location: Fairview, OR
 
Join Date: Oct 2010
Posts: 17
Mein Auto: 2001 BMW 530i
It may sound weird but try melting some wax onto the Serpentine Belt, or spraying some WD-40 and see if the sound goes away. if it does then it's probably your belt tensioner.
Reply With Quote
  #7  
Old 11-14-2012, 03:32 PM
Psalm11_6 Psalm11_6 is offline
Registered User
Location: Kansas
 
Join Date: Oct 2012
Posts: 56
Mein Auto: 98 540iA Sport
I'll give that a shot next time I drive it. Might be the weekend as im still milking two wheels as much as I can :-D.

It appears to be relates to road speed though, not engine speed, which led me to something wheel or drive shaft.

I'll update once I have anything of note.

Thank you all for the input!

Please forgive any grammatical errors, sent from mobile
Reply With Quote
  #8  
Old 12-07-2012, 10:26 AM
Psalm11_6 Psalm11_6 is offline
Registered User
Location: Kansas
 
Join Date: Oct 2012
Posts: 56
Mein Auto: 98 540iA Sport
Well, I pulled off each wheel and did a ton of lubricating on anything that looked like it needed it. Pic attached of mid-process :-)

No dice. One thing that did come to mind - I replaced the later OEM Textar pads with Jurid pads in the rear and these cover a larger part of the rotor than the Textars did. I thought perhaps the squeak was related to the wearing of the rust ring around the rotor by the new pads, but this has since worn down and the squeak persists.

Now I'm wondering if having the Textars still up front and the difference in grip is what's screwing with me. I check for free rotation up front and it seems fine. There's some tension in the rear in neutral, but this is expected. Still nothing catching that I've found.

I'm going to continue to tinker and plug away. Maybe I'll start going through the process of upgrading the braking components while I'm at it :-)
Attached Thumbnails
Click image for larger version

Name:	540iSqueak.jpg
Views:	37
Size:	168.5 KB
ID:	352252  
Reply With Quote
  #9  
Old 12-07-2012, 11:17 AM
AnotherGeezer's Avatar
AnotherGeezer AnotherGeezer is online now
Hofmeister Kink
Location: ManchVegas, New Hampster
 
Join Date: Dec 2009
Posts: 3,723
Mein Auto: 2003 530i/5
Check for hitchhikers.
__________________
Reply With Quote
  #10  
Old 12-07-2012, 12:26 PM
mbell666 mbell666 is offline
Officially Welcomed to the 'Fest
Location: Austin, TX
 
Join Date: Jul 2012
Posts: 220
Mein Auto: e39 2002 540i6
Is the sequel related to road speed, engine speed (revs) or acceleration/throttle position?

If it revs need to look at belts, pulleys etc. Acceleration I be looking a vacuum leak on the engine. Road speed i be looking at brakes and suspension, running gear etc.
__________________
An e39 is like a beautiful wife, needs constant attention, lots of money, lets you down at the worse times but you’d never be without it.
Reply With Quote
  #11  
Old 12-07-2012, 12:33 PM
Psalm11_6 Psalm11_6 is offline
Registered User
Location: Kansas
 
Join Date: Oct 2012
Posts: 56
Mein Auto: 98 540iA Sport
I mentioned it earlier, but it is a ways up in the thread. It seems to be road speed related only. It also goes away after 10 minutes or so of driving which I thought was weird, probably related to moving parts warming up...
Reply With Quote
  #12  
Old 12-07-2012, 12:40 PM
AnotherGeezer's Avatar
AnotherGeezer AnotherGeezer is online now
Hofmeister Kink
Location: ManchVegas, New Hampster
 
Join Date: Dec 2009
Posts: 3,723
Mein Auto: 2003 530i/5
Secondary Air Pump?
__________________
Reply With Quote
  #13  
Old 12-07-2012, 12:44 PM
Psalm11_6 Psalm11_6 is offline
Registered User
Location: Kansas
 
Join Date: Oct 2012
Posts: 56
Mein Auto: 98 540iA Sport
As it seems to be directly related to road speed, I'm not sure how it could be the secondary air pump... Though I could easily be missing something. Could you clarify?
Reply With Quote
  #14  
Old 12-07-2012, 12:53 PM
AnotherGeezer's Avatar
AnotherGeezer AnotherGeezer is online now
Hofmeister Kink
Location: ManchVegas, New Hampster
 
Join Date: Dec 2009
Posts: 3,723
Mein Auto: 2003 530i/5
I'm just spitballin'

Mine gives a quick squeal in cold weather only but I have heard others say that theirs has acted similar to what you've described. I also had a wicked bad tear in my intake boots that caused a nice falsetto on acceleration. but happened all the time and was temperature independent.

How are your forward inner fender liners? If they are damaged or missing? Your pump could get gunk on it and cause it to act weird or straight up fail. When I bought my car, they were both missing and I never drove it in wet or snowy conditions until I replaced them.
__________________
Reply With Quote
  #15  
Old 12-07-2012, 12:56 PM
Psalm11_6 Psalm11_6 is offline
Registered User
Location: Kansas
 
Join Date: Oct 2012
Posts: 56
Mein Auto: 98 540iA Sport
Fender liners are all in place and in good shape :-)

A good deal of the fun for this car (at least for me) is working on it. I refuse to give up till I find the problem lol

I'm actually wondering if a wheel baring could cause something like this squeak at this point... Though in my experience if a baring starts going, it's a grind and not a squeak.
Reply With Quote
  #16  
Old 12-07-2012, 02:35 PM
Albo's Avatar
Albo Albo is offline
Der ursprünglich....Albo
Location: Southern California
 
Join Date: Apr 2004
Posts: 830
Mein Auto: OO=[][]=OO
Can you take video of sound?
__________________
Want to learn about your E39 5 Series?

Click Me

Albo's Official Upgrade Thread: http://www.bimmerfest.com/forums/sho...d.php?t=532572


2003 530iA - Mumbo Jumbo

Quote:
Originally Posted by edjack View Post
If you don't want to do nothing, you must want to do something.
Reply With Quote
Reply

Bookmarks


Forum Navigation
Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 5 Series > E39 (1997 - 2003)
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 06:46 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
© 2001-2011 performanceIX, Inc. All Rights Reserved .: guidelines .:. privacy .:. terms