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10-13-2009, 12:50 PM | #1 |
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Strange Noise
I have a strange noise coming from the underside of my 2009 E92 M3, and I thought maybe you all can help.
It is a metal "clang" coming from the underside, front/mid section, usually only at low speed, and usually when the clutch (6 speed here) is engaged - like coasting to a stop or pulling ahead slowly into a parking garage, etc. It doesn't happen a lot, but it is there every so often. Dealer couldn't replicate it, of course. Thoughts?
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2009 E92 M3 - Jerez Black/Black w/ black carbon leather interior, 6 spd., Cold, Premium, Technology, 19" OZ Racing wheels (black), iPod/USB. Mods: aPe air filter, Borla exhaust, H&R sport springs, UUC Evo3 SS w/ DSSR, Power Pulley Kit, carbon kidney grills, Vorsteiner front air dam, carbon side gills, smoked side markers
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10-13-2009, 12:59 PM | #2 |
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Normal drivetrain slow-speed 'clunk' (tranny/diff slop). Yes, it's more noticeable on this car than others I've owned/driven, but there's nothing to worry about IMO. Consider it an idiosyncrasy . These cars are not quiet by any means. Take care.
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10-13-2009, 01:01 PM | #3 |
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Really? A loud "clang" is normal slop in the drivetrain? THAT loud? Weird.
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2009 E92 M3 - Jerez Black/Black w/ black carbon leather interior, 6 spd., Cold, Premium, Technology, 19" OZ Racing wheels (black), iPod/USB. Mods: aPe air filter, Borla exhaust, H&R sport springs, UUC Evo3 SS w/ DSSR, Power Pulley Kit, carbon kidney grills, Vorsteiner front air dam, carbon side gills, smoked side markers
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10-13-2009, 01:04 PM | #4 |
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Don't know how loud it is buddy, so if you're worried, get it checked. Or drive other cars. All 3 M3s I drove had it, but can't read your mind as far as loudness. You might need to change your driving technique as well. Good luck.
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10-13-2009, 01:04 PM | #5 |
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Its probably a stone caught up in the area of the brake disc backing plate. You can sometimes dislodge it by reversing or it will eventually fall out by itself.
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10-13-2009, 01:25 PM | #6 |
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You should mount a video cam in the engine compartment and drive around. Record the sound that way, then play it for your service manager. That would help them. If you can tell them what you were doing while the recorded sound occurs, that would be really helpful.
Or maybe there's something else in the wheel well that you can strap it to. That might be better b/c it would be less engine noise and closer to the suspension. Get a small cheap cam and a bunch of zip ties. I'm sure there's a way. |
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10-13-2009, 05:13 PM | #7 |
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Search other threads. This seems to be the best explanation. I had it a couple times myself and then it went away.
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10-13-2009, 05:42 PM | #8 |
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I talked to a couple other forum members about this noise that I experienced which is similar to OP's, " cling clang " noise that is consistent as the wheels spin, coming from rear section under panel. We took off the wheel and checked the brake and found nothing caught inside. the OP in this thread http://www.m3post.com/forums/showthread.php?t=248082 found out the noise is coming from a lose bolt in the midsection after pushing the car hard (which is what I and another forum member did according to his friend). I have yet to check on my own, but will do so this weekend. However the noise is not present anymore as of today, crossing my fingers
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10-13-2009, 08:59 PM | #9 |
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I think you've got it right there.. I also drive the 6MT and from what the OP is describing, this is the most likely culprit. I've had other manual cars that had the same characteristic. Smoother clutch disengagement and proper gear selection usually correct the issue/noise.
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10-13-2009, 10:06 PM | #10 | |
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You can also duplicate the clunk by letting the rpm drop too much and allowing the engine to get jerky near idle. By the way, there's no mistaking the gear-slop clunk with a rock on the brakes; totally different noises. Good evening folks. |
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10-13-2009, 10:20 PM | #11 | |
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Quote:
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