n54 trouble

chrisc3 · 06-30-2014, 06:33 PM

A few days ago while i was driving the car hard i noticed this rattling noise upon moderate acceleration. At first i thought it was my ac but it still rattles with our without it being on. The noise sounds like a tin can filled with pennies. When my speed increases the rattleing increases. It only dies down if i completely let off the throttle and let the rpms drop down. Video---- http://m.youtube.com/watch?feature=y...&v=Tdpjd3Pk2Ak

335NJ · 06-30-2014, 07:11 PM

That is terrible, and I have no idea what that would be. Have you had anyone look at it yet?

chrisc3 · 06-30-2014, 07:28 PM

No not yet i was kinda hoping it might be an easy fix before i take it to a dealer

Ingeniator · 06-30-2014, 08:40 PM

Without any more info. My best guess is one of the cats is rattling. Post mods to help us narrow it down. Take it in to a mechanic if you need it as a daily driver or aren't very mechanically inclined. You shouldn't drive it until you have it figured out incase it is a bearing.

Jklad · 06-30-2014, 10:54 PM

Holy crap, what does it sound like at idle in neutral?

chrisc3 · 06-30-2014, 11:58 PM

Its wierd because at idle everything sounds normal. I can even drive around town and everything and not a peep. I dont get any codes or anything but as soon as i have an opportunity to give it some gas, for example, getting onto an onramp that awful noise comes up. The noise certainly amplifies the faster i go.

dannygee90 · 07-01-2014, 06:57 PM

Sounds harsh, check all exhaust fittings on bottom? Could be rattling under load? Cats could be another possibility, just throwing some ideas. Good luck, please keep us posted.

06-30-2014, 06:33 PM	#1
chrisc3 bigdaddy 0 Rep 50 Posts Drives: 2008 135I Join Date: Sep 2013 Location: United States iTrader: (0) Garage List 2007 bmw 335i [0.00]	n54 trouble A few days ago while i was driving the car hard i noticed this rattling noise upon moderate acceleration. At first i thought it was my ac but it still rattles with our without it being on. The noise sounds like a tin can filled with pennies. When my speed increases the rattleing increases. It only dies down if i completely let off the throttle and let the rpms drop down. Video---- http://m.youtube.com/watch?feature=y...&v=Tdpjd3Pk2Ak
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06-30-2014, 07:11 PM	#2
335NJ Colonel 535 Rep 2,872 Posts Drives: 2008 335i 6MT E90 Join Date: Feb 2014 Location: NJ/Philadelphia Suburbs iTrader: (1)	That is terrible, and I have no idea what that would be. Have you had anyone look at it yet? __________________ *BSM E90 6MT*-JB4 G5 ISO-BMS DCI-Golf-Tee Mod-Hankook S1N2 Non-RFT-ER Chargepipe/TiAL BOV-E40 blend-VRSF V2's-M3 CDV-MHD/JB4 FLASH-VRSF 5" STEPPED FMIC
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06-30-2014, 07:28 PM	#3
chrisc3 bigdaddy 0 Rep 50 Posts Drives: 2008 135I Join Date: Sep 2013 Location: United States iTrader: (0) Garage List 2007 bmw 335i [0.00]	No not yet i was kinda hoping it might be an easy fix before i take it to a dealer
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06-30-2014, 08:40 PM	#4
Ingeniator Major 34 Rep 1,093 Posts Drives: 07 335XI(90) 09 135I(82) Join Date: Nov 2013 Location: Fort Mac, Alberta iTrader: (1)	Without any more info. My best guess is one of the cats is rattling. Post mods to help us narrow it down. Take it in to a mechanic if you need it as a daily driver or aren't very mechanically inclined. You shouldn't drive it until you have it figured out incase it is a bearing. __________________ 07 335XI (A008006) 6AT ~94K miles JB4 G5 ISO VSRF DP's 09 135I M (VK80379) 6MT. Race Project car. 1) Install Cobb/piggyback? and Motiv 600 Kit[HTA3076R w/ tial .82] 2) JRZ or Moton suspension. 3) Build high flow intake manifold with multi-port fuel and relocate OFH 4) Build full cage 5) Complete staged twin setup with HTA4205R [w/Tial 1.16] 6) Complete dry sump system
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06-30-2014, 10:54 PM	#5
Jklad Lieutenant Colonel 424 Rep 1,643 Posts Drives: 2007 335i Coupe Join Date: Nov 2010 Location: Palatine, IL iTrader: (0)	Holy crap, what does it sound like at idle in neutral? __________________ 2007 E92 335i MT
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06-30-2014, 11:58 PM	#6
chrisc3 bigdaddy 0 Rep 50 Posts Drives: 2008 135I Join Date: Sep 2013 Location: United States iTrader: (0) Garage List 2007 bmw 335i [0.00]	Its wierd because at idle everything sounds normal. I can even drive around town and everything and not a peep. I dont get any codes or anything but as soon as i have an opportunity to give it some gas, for example, getting onto an onramp that awful noise comes up. The noise certainly amplifies the faster i go.
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07-01-2014, 06:57 PM	#7
dannygee90 First Lieutenant 33 Rep 386 Posts Drives: f86 x6m Join Date: Jul 2011 Location: United States iTrader: (1) Garage List 19 x6m [0.00]	Sounds harsh, check all exhaust fittings on bottom? Could be rattling under load? Cats could be another possibility, just throwing some ideas. Good luck, please keep us posted.
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