Cold High Pitch Whine from engine area... - BMW Forum - BimmerWerkz.com
3-Series (E46, E90) Chat relating to the BMW 3-Series from 1999 to Current. Models include: BMW 316i, BMW 318i, BMW 318Ci, BMW 320i, BMW 323i, BMW 325i, BMW 330i, BMW 328 Ci, BMW 328i, BMW 325i/xi, BMW 330Ci, BMW 320d, BMW 330d, BMW 335d.

 
LinkBack Thread Tools Display Modes
#1 (permalink) Old 12-10-2009, 03:28 PM
Neutral Member
 
441tech's Avatar
 
Join Date: Nov 2005
Location: Toledo, OH
Posts: 91
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
441tech is on a distinguished road
(Thread Starter)
Question Cold High Pitch Whine from engine area...

I'm hoping someone else has had this problem...

I have a '99 323i E46 Sedan (M52 motor) Automatic. The car & trans. have 180,000 on the ticker, and the motor maybe has 110,000. When it's cold out (pretty much all the time now), as I accelerate through the gears (in D)there is a high pitch whining noise that seems to be coming from the engine compartment. It will slowly die off and go away as the car gets warmer. It really sounds very similar to a power steering pump that ran dry. If it's really cold, it doesn't seem to fully go away. The noise also changes directly with engine RPM, although I tried a free-rev once out of gear, and it didn't seem to do it, although after I put it back in gear and took off, the noise wasn't there anymore either. It's loudest under acceleration, quietist when I let off the gas.

The trans. shifts fine. (Although a little jerky until it warms up). No lights on in dash, engine runs fantastic. Full synthetic 5W-30 changed religously every 5,000 miles. The viscous fan is not siezed. No coolant leaks. The power steering system doesn't leak a drop, and the noise has absolutely no change when I turn the wheel (going around corners).

Could this be pulleys? Belts? Water Pump? Trans?

Any help/input would be GREATLY appreciated.

Officer: "I see you set the table for four."

Groucho Marx: "That's nothing--I set my alarm clock for eight."
441tech is offline  
Sponsored Links
Advertisement
 
#2 (permalink) Old 12-11-2009, 04:06 AM
Help from over the pond
 
marti5's Avatar
 
Join Date: Sep 2008
Location: IPSWICH. U.K.
Posts: 3,242
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
marti5 is on a distinguished road
It maybe your rear differential whining, the sound will be transmitted to the front of the car and the noise of a diff will go up and down with revs. Also with that sort of mileage when was the last time the trans had a fluid and filter change.

VELVET BLUE UK INDIVIDUAL , IM THE LAST
UNITED WE STAND DIVIDED WE FALL

I stepped in a plate of Pasta the other day - now I have to worry about my Carbonara footprint!
marti5 is offline  
#3 (permalink) Old 12-11-2009, 06:15 AM
42, The meaning of life
 
brettski's Avatar
 
Join Date: Jul 2009
Location: Melbourne, Australia
Posts: 2,405
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
brettski is just really nice brettski is just really nice brettski is just really nice brettski is just really nice brettski is just really nice
One way to isolate the diff is to get up to speed and slip into neutral/foor off the throttle, then listen for a change in the pitch. Given that you think its related to the revs, I'd be more inclined to think that its further up the drive train, into the gearbox or engine, or maybe the altenator/water pump/belt tensioner. Could it be an intake leak, or maybe some kind soul has installed a turbo when you weren't looking. Bless their hearts.
brettski is offline  
#4 (permalink) Old 12-11-2009, 07:10 AM
Help from over the pond
 
marti5's Avatar
 
Join Date: Sep 2008
Location: IPSWICH. U.K.
Posts: 3,242
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
marti5 is on a distinguished road
Quote:
Originally Posted by brettski View Post
One way to isolate the diff is to get up to speed and slip into neutral/foor off the throttle, then listen for a change in the pitch..
Not a good Idea in an automatic....

VELVET BLUE UK INDIVIDUAL , IM THE LAST
UNITED WE STAND DIVIDED WE FALL

I stepped in a plate of Pasta the other day - now I have to worry about my Carbonara footprint!
marti5 is offline  
#5 (permalink) Old 12-11-2009, 08:19 AM
Neutral Member
 
441tech's Avatar
 
Join Date: Nov 2005
Location: Toledo, OH
Posts: 91
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
441tech is on a distinguished road
(Thread Starter)
Thanks for the advice. Although I forgot to mention that I also replaced the rear end a few months ago with a 30,000 mile unit. Plus, before I put it in, I drained the fluid that was in it and refilled with Redline.

That being said, when I started the car this morning, I noticed that it was making a bit more racket than before at idle. I rolled down the window, and it kind of sounded like it was pulleys or something...I had to get to work, so I'm going to check it out over the weekend, and I'll keep this thread updated. Hopefully it's nothing serious.

Thanks again.

Officer: "I see you set the table for four."

Groucho Marx: "That's nothing--I set my alarm clock for eight."
441tech is offline  
#6 (permalink) Old 12-11-2009, 11:55 AM
Help from over the pond
 
marti5's Avatar
 
Join Date: Sep 2008
Location: IPSWICH. U.K.
Posts: 3,242
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
marti5 is on a distinguished road
Hmmmmm.....Im now thinking its the torque converter on its way out.

VELVET BLUE UK INDIVIDUAL , IM THE LAST
UNITED WE STAND DIVIDED WE FALL

I stepped in a plate of Pasta the other day - now I have to worry about my Carbonara footprint!
marti5 is offline  
#7 (permalink) Old 12-11-2009, 07:11 PM
Neutral Member
 
441tech's Avatar
 
Join Date: Nov 2005
Location: Toledo, OH
Posts: 91
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
441tech is on a distinguished road
(Thread Starter)
Quote:
Originally Posted by marti5 View Post
Hmmmmm.....Im now thinking its the torque converter on its way out.
Why do you say that?

Officer: "I see you set the table for four."

Groucho Marx: "That's nothing--I set my alarm clock for eight."
441tech is offline  
#8 (permalink) Old 12-11-2009, 10:49 PM
42, The meaning of life
 
brettski's Avatar
 
Join Date: Jul 2009
Location: Melbourne, Australia
Posts: 2,405
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
brettski is just really nice brettski is just really nice brettski is just really nice brettski is just really nice brettski is just really nice
Quote:
Originally Posted by marti5 View Post
Not a good Idea in an automatic....
Why is going to neutral whilst moving an issue with these gearboxs?

I have done this plenty of times in other cars, without any issues. I am not suggesting going Drive to Park whilst moving, but Drive - Neutral - Drive shouldn't be an issue unless there is something different about the way BMW configure their autos. If there is an issue please let me know because I'd like to be aware of it.
brettski is offline  
Sponsored Links
Advertisement
 
Reply

  BMW Forum - BimmerWerkz.com > BMW Model Specific Forums > 3-Series (E46, E90)


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
User Tag List

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
Please help.. high pitch sound from the hood youngs52 3-Series (E46, E90) 1 09-29-2009 10:05 AM
320D engine pitch intermittently changes high at 3000rpm? shuurajou 3-Series (E46, E90) 3 07-14-2009 01:52 PM
High pitch noise from transmission pulafets 5-Series (E12,E28, E34, E39, E60) 9 09-21-2008 04:09 AM
high pitch whine at 1500rpm Cronk325i 3-Series (E46, E90) 0 08-02-2004 05:47 PM
Help! 318I making horrible high pitch sound! jroberts312 3-Series (E36) 3 07-05-2004 09:15 AM

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
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome