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BMW 3-Series (E90 E92) Forum > BMW E90/E92/E93 3-series General Forums > General E90 Sedan / E91 Wagon / E92 Coupe / E93 Cabrio > Help! Rattle is making me crazy. Video inside!!!



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      02-14-2013, 09:22 PM   #1
stashtrey
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Help! Rattle is making me crazy. Video inside!!!

This rattle is driving me crazy.



Pronounced at cold start. Goes away of I put it in gear (AT). Comes back in neutral or park. Audible mostly from upper dash. Hard to hear with hood open (stethoscope arrives tomorrow).

It goes away after it heats up but will come back especially when coasting to a stop when it downshifts into 2nd gear.

The car runs great. No codes. Shifts great.

Have scoured threads and Google. Figuring it is a lifter stuck. Not waste gate rattle although I have a little of that chatter at idle.

Any ideas?

Recently changed plugs, oil, cleaned map sensors, new charge pipe, running JB4 G5. Been at 35% E85.

Getting ready to take it in to have been it looked at.
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      02-14-2013, 09:36 PM   #2
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      02-14-2013, 09:42 PM   #3
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Bring it in that would drive me insane!! No guarantees that they find it either but worth a try..Good luck
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      02-14-2013, 10:15 PM   #4
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Yeah....I'm definitely going crazy. Part of me is scared to death to find out what it might be.
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      02-14-2013, 10:23 PM   #5
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sounds like downpipes are hitting frame, or bad turbos
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      02-14-2013, 10:35 PM   #6
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Is the sound coming from the back? I have the same sound but I know where it's coming from on mines cuz the tip of my muffler is hitting my bumper when it shakes.

That was just an example but for yours it seems like some plastic part is getting hit or vibrating.
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      02-14-2013, 10:43 PM   #7
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It is definitely from up front. I agree...I sounds like something clattering lazily against something. If I give it gas it goes away. After it gets to temp it goes away but then will return when coming to a stop....neutral, sometimes in gear at a stop light.

Totally baffled. Hopeful it is something easy as the car runs fantastic. Pulls hard, no issues with the transmission.

Thanks for the replies. Hope to get it sorted soon. Ordered a stethoscope t hopefully pinpoint where its coming from. Too difficult to locate it with the hood up. Almost sounds like something's ng slapping.

Ugh!
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