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E90/E91/E92/E93 (2006 - 2013)
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  #1  
Old 08-03-2014, 08:05 PM
bmrnoob bmrnoob is offline
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2011 328i Coupe Terrible Whining Noise

I was driving home and all of a sudden I hear this whining which kept on going after I parked -- below is a video of it.



My car is under manufacturer's warranty and I also have the extended maintenance -- any ideas what the sound is coming from? I'm going to take it to the dealer, but I'd like to have an idea of what the problem could be when I drop it off to them. I let the car sit for a couple of hours and started it up and it no longer made the sound.

This is the first time I am hearing this whining. My card has 50k miles on it.

Thanks in advance.

Last edited by bmrnoob; 08-03-2014 at 08:08 PM.
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  #2  
Old 08-03-2014, 08:20 PM
aleks001 aleks001 is offline
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Location: Brisbane, Australia
 
Join Date: Nov 2011
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Mein Auto: 2006 BMW 325i
Quote:
Originally Posted by bmrnoob View Post
I was driving home and all of a sudden I hear this whining which kept on going after I parked -- below is a video of it.



My car is under manufacturer's warranty and I also have the extended maintenance -- any ideas what the sound is coming from? I'm going to take it to the dealer, but I'd like to have an idea of what the problem could be when I drop it off to them. I let the car sit for a couple of hours and started it up and it no longer made the sound.

This is the first time I am hearing this whining. My card has 50k miles on it.

Thanks in advance.
Can only guess that it's something on belt system, alternator, power steering pump, pulleys etc. Also your car isn't idling properly.
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  #3  
Old 08-03-2014, 08:33 PM
wilt wilt is offline
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Originally Posted by aleks001 View Post
Also your car isn't idling properly.
The E46 engine control is programmed to idle at 650 rpm (BMW tech cannot adjust engine speed upward, even if they try!)
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  #4  
Old 08-03-2014, 09:09 PM
aleks001 aleks001 is offline
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Location: Brisbane, Australia
 
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Originally Posted by wilt View Post
The E46 engine control is programmed to idle at 650 rpm (BMW tech cannot adjust engine speed upward, even if they try!)
First of all this is a E90, Second, it can be changed. Thirdly, it's idling less than 650 in his video and it's bouncing around. Should be flat on 600-650 and not moving that much. Also, when it comes down after he revs it should be a smooth motion, his is chopping under 1000 RPM.

Last edited by aleks001; 08-03-2014 at 09:10 PM.
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  #5  
Old 08-03-2014, 09:40 PM
wilt wilt is offline
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Originally Posted by aleks001 View Post
First of all this is a E90, Second, it can be changed. Thirdly, it's idling less than 650 in his video and it's bouncing around. Should be flat on 600-650 and not moving that much. Also, when it comes down after he revs it should be a smooth motion, his is chopping under 1000 RPM.
I had an E46 which idled at 650 rpm. The oil pressure light was coming on at idle, immediately upon picking up the car up from dealer service for CCV replacement and oil pressure sender replacement.

SA said maybe a bit of sludge stirred up during the service work accounted for the new oil pressure problem, after playing with it for another day. I then asked them to adjust idle to 750-800 rpm because the light would go out if I gently put pressure on the accelerator pedal. In spite of the fact that before the dealer service had my car, it idled properly without oil pressure issues; but after their work, the oil pressure light would be on during idle. They tried, but could NOT adjust idle speed as an interim fix in the hopes the sludge cleared. So I eventually agreed to take the car as-is -- only with the SA reassurance that my reluctance to accept the car (with oil pressure light issue) was noted in the records so they I could bring the car back in the future to address the issue. But the engine control would not permit their adjustment of idle speed.
...A couple days later the problem went away on its own.

Last edited by wilt; 08-03-2014 at 09:43 PM.
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  #6  
Old 08-04-2014, 11:33 AM
Watchme Watchme is offline
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That sounds exactly like a slipping serpentine belt on a cold morning.
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  #7  
Old 08-05-2014, 02:55 PM
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BostonB6 BostonB6 is offline
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Quote:
Originally Posted by bmrnoob View Post
My card has 50k miles on it.

Thanks in advance.
2011 with 49.4k miles per the ODO....all I hear is an under the wire warranty repair. Make sure you don't go over the 50k mile mark. Shut it off and have it towed.
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Old 08-06-2014, 06:07 AM
Watchme Watchme is offline
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Listening to this again, sounds more like a combination of slipping belt and a "dry" bearing on either tensioner, PS, or alternator.
I would take the belt off and rotate each accessory and tensioner by hand, you will feel a bad bearing with your fingers right away.
That is if you want to tackle this for yourself, otherwise tow to dealership as above guy said.
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  #9  
Old 08-07-2014, 10:15 PM
bmrnoob bmrnoob is offline
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Got it back from the dealership yesterday

Thanks all for the responses...


OK -- I took it to the dealershp and got it back yesterday -- they fixed the following under warranty:

1 -- I gave them the video with the noise.

They replaced the valve cover assembly and gaskets including the buil-int oil seperator unit.

2 -- I complained about knocking/rattling noise around 2000 RPM.

VANOS unit had a retainer bolt that had fallen out -- found and removed the bolt from behind timing chain guides. Replaced both VANOS units and sensor wheels.

--

I am hoping this resolves the issue, no problem so far knock-on-wood.

I notice that my car is now idling around ~600 RPM.

Last edited by bmrnoob; 08-07-2014 at 10:16 PM.
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  #10  
Old 08-08-2014, 08:20 AM
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BostonB6 BostonB6 is offline
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Good to hear they took care of you. You're lucky that you were still under warranty.
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