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Old 05-22-2020, 01:05 PM   #1
Neolin
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Squeaking sound when driving over 20 mph

The car is BMW 325ci e46 from 09/2002. Manual/petrol. Convertible.

Hi all, I've got this problem that happened to me recently. Pre history is I changed my rear brake rotors and pads a month ago and then my front ones two weeks ago (Textar/Bosch). I don't know if it helps. Also a few weeks ago I renewed my cooling system including radiator.

So it started a week ago. It was quieter at the beginning but now it's quite noisy. I can hear some squeaking sounds after driving for 2-3 miles and they won't stop. I've noticed I can't hear them when I am at slow speeds but when I am going 20-40 mph and more the car's front squeaks like crazy. My rpm at that time are within 1.5-2.3 range. The sound comes from both sides, then from one side then from both again. It stops when I am breaking. The car is quite old, I bought it recently and never had it taken to a car service.

Any ideas? I would be very grateful for your help!
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Old 05-22-2020, 01:44 PM   #2
pineapple_tree
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Sounds like you might have a bad CSB, and it's causing the driveshaft to spin inside of the CSB more freely. Drop the exhaust down ( you don't need to take it off if need be) And drop the heat shield to check the flex disc, and the CSB.
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theres so much i wanna do to my car but there's something called money and I don't have any
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Old 05-23-2020, 03:22 AM   #3
Anticdubai
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If CSB he would feel vibrations rather than sound/
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Old 05-23-2020, 06:58 AM   #4
MrMCar
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Need a little more help mate. Is the squeaking from the engine or the tires/suspension, as you elude to?

Get to the trouble area on a very quiet B road and put in neutral an shut the car off. Noise still there?
Divide and conquer.
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Old 05-25-2020, 03:13 PM   #5
Neolin
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Thank you for your suggestions, I did as instructed and it seems like the noise comes from the front brakes. Both of them. I lifted the car and tried spinning wheels and it seems like they spin with a light resistance. Not as freely as I remember them before installing new brakes and discs but they are not locked either. Is it supposed to be like that in a weeks time after the new brakes were installed or will it require some action?

Quote:
Originally Posted by pineapple_tree View Post
Sounds like you might have a bad CSB, and it's causing the driveshaft to spin inside of the CSB more freely. Drop the exhaust down ( you don't need to take it off if need be) And drop the heat shield to check the flex disc, and the CSB.
Quote:
Originally Posted by MrMCar View Post
Need a little more help mate. Is the squeaking from the engine or the tires/suspension, as you elude to?

Get to the trouble area on a very quiet B road and put in neutral an shut the car off. Noise still there?
Divide and conquer.
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Old 05-25-2020, 05:02 PM   #6
MrMCar
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I have Bosch Quietcast on my work truck. Tundra, guess what, they are noisy.
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Old 05-26-2020, 02:30 PM   #7
Neolin
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Quote:
Originally Posted by MrMCar View Post
I have Bosch Quietcast on my work truck. Tundra, guess what, they are noisy.
well, that's **** then ***x1f642; I'll wait for a month and then see what can be done
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