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  #1  
Old 11-17-2020, 09:46 PM
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Metallic Scraping Noise While In Gear - (Not Brakes)

Hello! Long time lurker here, first time poster. Can't count how many times the information on this forum has saved my butt. Hoping I can solve this issue and leave behind a thread that could help someone else.

I have a rhythmic metallic scraping noise coming from under the driver side front that hasn't gotten any worse over the past month (800 miles) of driving. I've been trying to pinpoint the location of the noise since I first noticed it. Here are the symptoms / details.
2006 E53 X5 3.0i Auto - 116,000 Miles
  • Only occurs while in drive or reverse.
  • Only really hear it when giving it light throttle (between 1k - 2.5k RPM)
  • Tied to tire revolution
  • Indie claims there was no noise while on lift and in gear
  • Braking doesn't change it
  • Steering doesn't seem to change it
  • More audible after coming to a quick stop
  • Seems to be more audible while driving up an incline
Just changed the front calipers, rotors, and pads today due to a caliper seizing. The noise is still present.

Below are two videos of the noise.

https://drive.google.com/file/d/1Rxo...ew?usp=sharing

https://drive.google.com/file/d/1Z5t...ew?usp=sharing



Thank you for taking the time to read my post!
-qlty

Last edited by qlty; 11-18-2020 at 09:44 AM.
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  #2  
Old 11-17-2020, 11:25 PM
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Almost sounded like as you turned left the scraping stopped?

Just thinking out loud here but possibly a cv shaft and maybe when it was on the lift, tire and suspension hanging, it out enough pressure on the cv knuckle to make it quiet.


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Old 11-18-2020, 12:23 AM
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That sound more like it's in time with the front diff than it does the wheel?? Is that oil on the fender well ??
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Old 11-18-2020, 07:11 AM
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Quote:
Originally Posted by 80stech View Post
That sound more like it's in time with the front diff than it does the wheel?? Is that oil on the fender well ??
Same here. The frequency is definitely higher than wheel rotating and would more likely fit to front propeller / front diff intake side.
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Old 11-18-2020, 07:33 AM
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I've had a similar noise and it was the dust shield lost a bolt. It would go away on the turn because the steering can make the tie rod touch it if it's out of place, if so you'll be getting a sheetmetal rattle soon when the other bolts loosen up.

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Old 11-18-2020, 08:38 AM
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Quote:
Originally Posted by EODguy View Post
I've had a similar noise and it was the dust shield lost a bolt. It would go away on the turn because the steering can make the tie rod touch it if it's out of place, if so you'll be getting a sheetmetal rattle soon when the other bolts loosen up.

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Thatís kind of where I was, sheet metal sounding and on a lift the suspension and steering components sag so you wouldnít hear it. Iím thinking if it were the diff, lift or no lift, it would still make noise - I know mine did when it failed.


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Old 11-18-2020, 09:14 AM
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Thanks for all the replies! Took it to work this morning and it was a bit quieter than usual. It's in the 20's this morning in Boston, so it could be due to the cold?


Quote:
Originally Posted by Purplefade View Post
Almost sounded like as you turned left the scraping stopped?
Just thinking out loud here but possibly a cv shaft and maybe when it was on the lift, tire and suspension hanging, it out enough pressure on the cv knuckle to make it quiet.
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The noise goes away when I let off the throttle, I must have done that in the video. Just re-confirmed on the way to work this morning that it doesnít go away or change when turning.

I was thinking it could be related to the CV axel. The boot is in perfect condition though, didnít seem off at all visually.


Quote:
Originally Posted by 80stech View Post
That sound more like it's in time with the front diff than it does the wheel?? Is that oil on the fender well ??
Could be, I just know that it the rhythm increases in tempo with speed. Should have been clearer!
Thatís just the mess I left after doing the brake job, need to get that cleaned up!


Quote:
Originally Posted by EODguy View Post
I've had a similar noise and it was the dust shield lost a bolt. It would go away on the turn because the steering can make the tie rod touch it if it's out of place, if so you'll be getting a sheetmetal rattle soon when the other bolts loosen up.
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Havenít looked the the dust shield bolts at all, I did check for rocks and made sure it wasnít touching the rotor before and after the brake job. That could be making that kind of sound for sure, but wouldnít it happen if I was in neutral too? This noise only happens when in gear and on the throttle.

Last edited by qlty; 11-18-2020 at 09:43 AM.
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Old 11-18-2020, 09:22 AM
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Found a YouTube video of a pre-facelift, non-xdrive (2000-2003) X5 that was making the same noise with throttle. Not sure it this helps narrow it down. The poster claimed it was a "faulty GM gearbox". Not sure if he's referring the the transmission or transfer case.

https://youtu.be/T9PQxeChsAU

Last edited by qlty; 11-18-2020 at 09:44 AM.
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Old 11-18-2020, 09:47 AM
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I believe those had a 5 spd GM transmission in them, my guess is heís talking about the tranny.

Fingers crossed that isnít your issue - though they do sound similar unfortunately.

If the boots are in good shape I agree probably not the CV, I guess I would start by thoroughly inspecting the heat sheild and then maybe getting the front end in the air and taking a stethoscope to that side driveline all the way to the diff while someone slowly turns that wheel.

May also take it back to your mechanic and see if he can put it back on the lift and using a transmission jack, or something similar, slowly raise that control arm to load that side and see if he can duplicate the sound.


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Old 11-18-2020, 10:55 AM
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Quote:
Originally Posted by Purplefade View Post
I believe those had a 5 spd GM transmission in them, my guess is heís talking about the tranny.

Fingers crossed that isnít your issue - though they do sound similar unfortunately.

If the boots are in good shape I agree probably not the CV, I guess I would start by thoroughly inspecting the heat sheild and then maybe getting the front end in the air and taking a stethoscope to that side driveline all the way to the diff while someone slowly turns that wheel.

May also take it back to your mechanic and see if he can put it back on the lift and using a transmission jack, or something similar, slowly raise that control arm to load that side and see if he can duplicate the sound.


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Thank you for the help! I'll definitely get it back in the shop and have them look at the heat shield bolts and see if they can load the front end.
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