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BMW 3-Series (E90 E92) Forum
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Me and my mechanic are stumped
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08-07-2023, 05:28 PM | #1 |
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Me and my mechanic are stumped
2006 325xi wagon with 113k miles. I have a rotational noise which I thought was coming from the front and which seems to get worse on hard right hand turns. I thought it was a left wheel bearing but could not definitively diagnose it so I brought it in to a local indie. He confirmed that he did not think it was a wheel bearing and said that all the wheel bearings were very quiet. I have pulled all the brakes and the rear CV axles in the hopes of identifying the source of the noise but I cannot figure it out and neither can my mechanic. It kind of sounds like the scuffing a brake pad against the rotor but I have checked this and I don't hear it with the car on jack stands. The frequency also seems to coincide with a rotation of a wheel. I wonder if it could be a bearing in the diff but I don't know how to diagnose it. My mechanic did not think it was due to tires but I wonder if he is correct. He did move tires around but the noise is still there. You have to go slow to hear it because at speed there is too much road noise. Anyone have any ideas of where to go from here? If I have a problem I would like to resolve it before it gets worse.
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08-11-2023, 08:08 AM | #2 |
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For clarity, did you pull the front axles and check the CV joints there as well? Also, when you pull the brakes, are you pulling them off and spinning the wheels and listening for the noise or just inspecting?
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08-11-2023, 08:16 AM | #3 |
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I did not pull the CV axles. I did pull the brakes and spun the wheels while listening with the electronic stethoscope. I did not hear any noises that would tell me that I needed to pull the CV axles as this is a major effort. It is definitive that the front driveshaft needs to be replaced. I will replace this and see if there is an improvement. If not my next move will be to replace the tires. They are getting very loud with road noise and are close to the end of their lifespan. If these two things don't resolve it then I will be back here asking more questions.
Here is the link to the electronic stethoscope, I found it very help for diagnosing and eliminating the issues: https://www.amazon.com/dp/B0796N3G4Z...roduct_details Last edited by sharadn; 08-11-2023 at 08:18 AM.. Reason: added link to stethoscope |
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08-14-2023, 02:00 PM | #6 |
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Drives: 2008 335xi 6spd Coupe
Join Date: Dec 2007
Location: Boston
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There's a heat shield type thing that could be the culprit. Some kind of shroud. I literally just had to bend mine back to stop the rotational sound.
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08-17-2023, 02:04 PM | #8 |
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I just received the driveshaft and will install it shortly. Does anyone know if there is an orientation on this? Both ends look the same to me with the exception that there is a weight on one end.
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08-18-2023, 07:25 AM | #9 |
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I just received the driveshaft and installed in. It seems to have eliminated the noise. Thank you Efthreeoh! If I have troubles with this driveshaft I will report back here but since it has a 12 month warranty and the bearings can be replaced I am not too worried.
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12-14-2023, 10:20 PM | #10 |
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Like a bit of a whining sound or whistle maybe? Try turning your cabin air fan off. Like your heating/cooling fan thingy. Now do the right hand turn.
If the sound stopped, just take out your blower motor and hit the middle spindle thing with some rust prevention spray. Like wd40 but a little thicker. Turn the blower a bit so the lube works its way down the spindle. Hit it from both ends. Let me know how it goes. |
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