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E46 M3 (2001-2006) Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006.


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Old Wed, Apr-19-2017, 05:52:20 AM   #1
nbriggs1988
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Default Need some help trying to pinpoint "Rumble" noise heard from inside cabin. Need some s

Firstly, let me apologize in advance for my crude attempt to describe the symptoms I experienced this evening on my commute home.

Everything started out fine, as usual. I will note, a suspect idler pulley has been making some minor "whirring" sound on cold starts (similar to supercharger whine), something i was planning to resolve in the next couple weeks. Sounds goes away once car gets to operating temp.

But after driving about 15 minutes of highway driving, and stop-and-go traffic off the highway, I made a pit stop. Car sat for about 5 minutes, and when I started it back up, was greeted by what I can best describe sounded like a rumble sound, like a really loud baseball card flapping on bicycle spokes (best analogy I can think of) or what I thought could be the fan clutch making contact against something. However, the sound was most pronounced inside the cabin, and sounded like it was coming from underneath the car, not from the engine.

Fearing the worst I pulled the oil filter housing, no metal flakes, or anything alarming. and from further careful monitoring on the drive home it would mainly make this weird noise which seemed unrelated to engine speed. Engine sounded smooth and silky, def no rod knocking noise, and only seemed most pronounced in first 2 gears, approx 2-4k rpms.

Again, the sound appeared like it was coming from under the car, or by exhaust manifold side, and seems most pronounced on take-offs or on deaccelaration, either in gear, or neutral coasting, just not at pronounced.

I'm wondering the the driveshaft was smacking some of the heat shielding around, or guibo/flex disk failure.

Any advice or similar experience would be appreciated!



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Old Wed, Apr-19-2017, 07:00:00 AM   #2
K0nArtist
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Default Re: Need some help trying to pinpoint "Rumble" noise heard from inside cabin. Need so

Get under the car and start checking stuff maybe a heat shield came loose or something a long those lines, might be driveshaft.
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Old Wed, Apr-19-2017, 11:26:21 AM   #3
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Default Re: Need some help trying to pinpoint "Rumble" noise heard from inside cabin. Need so

Center support bearing may be torn.
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Old Wed, Apr-19-2017, 05:21:49 PM   #4
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Default Re: Need some help trying to pinpoint "Rumble" noise heard from inside cabin. Need so

Thanks guys, good place for me to start. I'll be sure to update in the next few days. The noise went away last night, and didn't come back when I was checking it again. But I'm not going to be driving the car until I check it out

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Old Wed, Apr-19-2017, 10:14:05 PM   #5
nbriggs1988
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Default Re: Need some help trying to pinpoint "Rumble" noise heard from inside cabin. Need so

@aznniche I think you are dead on. After hearing a couple YouTube videos, that is the same sound I heard yesterday.

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Old Wed, Apr-19-2017, 10:38:03 PM   #6
F1Dryvr
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Default Re: Need some help trying to pinpoint "Rumble" noise heard from inside cabin. Need so

I believe this is your Rear Driveshaft CV joint. Rumble under harder acceleration at low rpms in low gears. If you done any work on or near the driveshaft or if you see grease being flung near the rear driveshaft mating to the diff, youve likely got a bad gasket back there (5$) and the cv joint has lost its grease. If you like torture you can pull the cv joint off, search youtube for videos on how to repack it with grease and put it back on with a new gasket. Or they sell just the cv joint to bolt on for about 200$. Hope this helps.
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Old Thu, Apr-20-2017, 01:23:02 AM   #7
Jazzkat
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Default Re: Need some help trying to pinpoint "Rumble" noise heard from inside cabin. Need so

2,000 to 4,000 rpm in one and two, my money on CSB.
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Old Thu, Apr-20-2017, 08:51:31 PM   #8
nbriggs1988
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Default Re: Need some help trying to pinpoint "Rumble" noise heard from inside cabin. Need so

Quote:
Originally Posted by F1Dryvr View Post
I believe this is your Rear Driveshaft CV joint. Rumble under harder acceleration at low rpms in low gears. If you done any work on or near the driveshaft or if you see grease being flung near the rear driveshaft mating to the diff, youve likely got a bad gasket back there (5$) and the cv joint has lost its grease. If you like torture you can pull the cv joint off, search youtube for videos on how to repack it with grease and put it back on with a new gasket. Or they sell just the cv joint to bolt on for about 200$. Hope this helps.
I'll try to get my car up in the air later today and check everything out with the driveshaft, and I'll def check the rear CV. On a lighter side note, I did drive the car today, and no noise whatsoever.

I'll keep y'all updated. Thanks for the advice guys 👍👍

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Old Fri, Apr-21-2017, 12:06:34 AM   #9
nbriggs1988
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Default Re: Need some help trying to pinpoint "Rumble" noise heard from inside cabin. Need so

Update: just looked under the car, and appears that 2 bolts came loose on the exhaust support brace, and walked out. Hopefully this resolved the issue I was hearing. The guibo looked like it was in good shape, no cracks. And the driveshaft didn't have any noticable play, without removing the exhaust and heat shield covering it.

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Discussing Need some help trying to pinpoint "Rumble" noise heard from inside cabin. Need some s in the E46 M3 (2001-2006) Forum - Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006. at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)