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03-12-2024, 02:33 PM | #1 |
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Noise coming from rear of car
When I'm at a stop and roll forward or backwards, I hear a faint noise coming from the rear of the car that sounds like some one crinkcling an empty bag of chips. Weird comparison I know, but its pretty accurate. Any ideas on what this could be? I jacked the rear end up and turned the wheels by hand but no noise.
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2008 328i e93- 3SIM, StageFP tune, magna flow #12148 muffler + vibrant resonator, BMS filters, Bilstein B8s, H&R sport springs, ECS sway bars, whiteline rear subframe bushings, rouge engineering trans mounts, custco front strut bar, M3 front lower control arms. Cosmis R1 18x8.5 245/40 front 18x9.5 255/35 rear.
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03-12-2024, 03:18 PM | #2 | |
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03-12-2024, 03:19 PM | #3 |
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you should try to repeat your test with the car sitting on all four tires and the transmission in neutral. Find a safe spot that is flat and quiet. Place the transmission in neutral, and then push the top of one of the rear tires to easily make the car roll forward and backward and listen for the noise.
It's possible the noise is only present at standard ride height, but when jacked up off the ground the suspension/tire positions change the location of whatever is rubbing or making the noise. Maybe someone is locked in your trunk and just finished a bag chips?
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03-12-2024, 03:22 PM | #4 | |
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2008 328i e93- 3SIM, StageFP tune, magna flow #12148 muffler + vibrant resonator, BMS filters, Bilstein B8s, H&R sport springs, ECS sway bars, whiteline rear subframe bushings, rouge engineering trans mounts, custco front strut bar, M3 front lower control arms. Cosmis R1 18x8.5 245/40 front 18x9.5 255/35 rear.
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03-12-2024, 08:45 PM | #5 |
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Sometimes the rear heat shield comes in contact with the drive shaft. Being that it’s super thin aluminum it sounds like a bush or scrapping can noise kinda. Just pull it away from the drive shaft to gain at least 1/2” clearance.
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03-12-2024, 10:27 PM | #6 |
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My muffler hanger weld competely deteriorated and separated and was making like brake squeak noise at cold start. This is the center metal hanger that the diffuser also attaches to.
I didn’t know until I recently installed new exhaust. Probably not the exact same issue but might be worthwhile to check it out. |
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03-13-2024, 08:08 PM | #8 |
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2008 328i e93- 3SIM, StageFP tune, magna flow #12148 muffler + vibrant resonator, BMS filters, Bilstein B8s, H&R sport springs, ECS sway bars, whiteline rear subframe bushings, rouge engineering trans mounts, custco front strut bar, M3 front lower control arms. Cosmis R1 18x8.5 245/40 front 18x9.5 255/35 rear.
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03-13-2024, 09:32 PM | #9 |
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After listening to the video above. What would yall say the issue?
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03-14-2024, 05:09 AM | #10 |
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which noise is it? the first noise sounds like the rotor on the backing plate the more faint noise sounds like the cv.
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03-14-2024, 05:31 AM | #11 |
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The crunchy/gritty noise. Which I'd assume is the cv axle. Just wondering if I'd need to replace the whole axle or not
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2008 328i e93- 3SIM, StageFP tune, magna flow #12148 muffler + vibrant resonator, BMS filters, Bilstein B8s, H&R sport springs, ECS sway bars, whiteline rear subframe bushings, rouge engineering trans mounts, custco front strut bar, M3 front lower control arms. Cosmis R1 18x8.5 245/40 front 18x9.5 255/35 rear.
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03-15-2024, 09:56 AM | #12 | |
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They said they removed the debris and the noise hasn't returned. |
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03-15-2024, 10:00 AM | #13 | |
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2008 328i e93- 3SIM, StageFP tune, magna flow #12148 muffler + vibrant resonator, BMS filters, Bilstein B8s, H&R sport springs, ECS sway bars, whiteline rear subframe bushings, rouge engineering trans mounts, custco front strut bar, M3 front lower control arms. Cosmis R1 18x8.5 245/40 front 18x9.5 255/35 rear.
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03-17-2024, 12:21 PM | #15 |
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So far, you're correct. I took the brake rotor off, cleaned it really well on the inside since there was a bunch if build up. Sprayed the parking brake down with brake cleaner and a fine wire brush. The noise hasn't come back yet
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2008 328i e93- 3SIM, StageFP tune, magna flow #12148 muffler + vibrant resonator, BMS filters, Bilstein B8s, H&R sport springs, ECS sway bars, whiteline rear subframe bushings, rouge engineering trans mounts, custco front strut bar, M3 front lower control arms. Cosmis R1 18x8.5 245/40 front 18x9.5 255/35 rear.
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