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X3 E83 (2004 - 2010)
Talk about the E83 BMW X3 in this forum!

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  #1  
Old 12-03-2016, 04:57 PM
Acidic Acidic is offline
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Mein Auto: 06 Infiniti M35
Horrid noise from 08 X3 with 56k miles

Hey,

I just bought an 08 x3 with 56k miles and it's great except the horrid noise it makes. I'll post a video at the bottom. You cannot feel any problems with power steering, transmission the alt seems to be making power fine, no lights are on and it can happen sitting still or moving. The engine runs smoothly and seems to be making plenty of power. There is no change to the power/idle of the engine whether it's making the sound or not. It seems to be connected to the RPM of the engine but not directly. There is some lag. I thought it might be something on the accessory belt so I swapped the pulleys and belt but it didn't make a difference. Oh and it's not the fan, at least not the electric one in the front.

We've driven it twice now on a 3 hr drive south and around town. The noise started on the first cold start since we purchased it and got worse over a couple weeks of driving it. Any ideas? When it first started it sounded like a card in bike spokes...

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  #2  
Old 12-03-2016, 05:36 PM
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Q4 Q4 is offline
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Mein Auto: 2008 x3
Air or vacuum leak. Need to fix that.
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  #3  
Old 12-03-2016, 05:39 PM
Acidic Acidic is offline
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I made a second video... seems like it's coming from the power steering reservoir. I moved the steering wheel around in the beginning. You can see the linkage moving. The sound changed a bit when the cap came off and it also sounds loudest at the PS reservoir cap.

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Last edited by Acidic; 12-03-2016 at 05:41 PM.
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  #4  
Old 12-03-2016, 06:13 PM
BMWaufKS BMWaufKS is offline
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Have you checked the fluid level in the PS?
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  #5  
Old 12-03-2016, 07:37 PM
swampX3 swampX3 is offline
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page 26 shows vacuum pump

get a mechanics stethoscope and probe for sounds from a failing power steering pump or vacuum pump shown on page 26

maybe easier to probe from below with the stone guard popped off

http://hartgens.nl/z4/wp-content/upl...N52-Engine.pdf


put he last seven of your VIN into realoem.com and get your exact engine and accessories layout ...best wishes
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Old 12-03-2016, 07:41 PM
swampX3 swampX3 is offline
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typical 08 N52 X3 LCI vacuum pump

from realoem.com

http://www.realoem.com/bmw/enUS/show...diagId=11_3758


also ....power steering pump

http://www.realoem.com/bmw/enUS/show...diagId=32_1645

Last edited by swampX3; 12-03-2016 at 07:42 PM. Reason: add info
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  #7  
Old 12-03-2016, 07:44 PM
swampX3 swampX3 is offline
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sound files etc of typical bmw power steering pump failure

https://www.google.com/search?client...UTF-8&oe=UTF-8
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  #8  
Old 12-04-2016, 08:51 AM
Acidic Acidic is offline
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Quote:
Originally Posted by BMWaufKS View Post
Have you checked the fluid level in the PS?
Yes, you can see it in the second video. I will take the stone guard off this morning and get my stethoscope out. I used it before but couldn't get down to the pump...

Last edited by Acidic; 12-04-2016 at 04:25 PM.
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  #9  
Old 12-04-2016, 10:07 AM
BMWaufKS BMWaufKS is offline
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OK. Turn the steering wheel lock to lock a few times (slow to moderate speed; parked; engine on; preferably with the front wheels off the ground -- be safe!) to help get any air out. If still bad (and obivously affected by the steering wheel movement), then I see a pump and fluid change in your near future. And a new filter/bottle.
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  #10  
Old Yesterday, 06:58 PM
Acidic Acidic is offline
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So it was too cold on Sunday to spend all day troubleshooting. Took it in to a local euro car specialty place and it turned out to be the alternator. Go figure. Glad I didn't spend all day messing with power steering.
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  #11  
Old Yesterday, 09:05 PM
BMWaufKS BMWaufKS is offline
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Glad it is solved! Interesting on it being the alternator -- I've heard various sounds from bad bearings in them, but not like that.
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