6mt rattling when turned off - Page 2 - BMW 3-Series (E90 E92) Forum

Kris · 09-18-2008, 11:24 PM

+34324

Its actually the gearbox input shaft, and is by design. Shut the car down with clutch in. Thats how you stop it.

sd390r · 09-19-2008, 10:55 AM

yup... turning the car off with the clutch in and havent heard it since... except if your trying to shift at very low speeds -_- no tricks for that i guess... people always think i destroyed my clutch and i have to explain to them

ianthegreat · 10-12-2008, 10:22 PM

Quote:

Originally Posted by mistermojorizin

its the clutch. it goes away if you hold down the clutch while turning it off. you also hear a similar sound sometimes when you try to get going in first at low speeds, like to park or something. my previous 6mt car, g35, did the same thing. and a lot of people with the 135 have asked the same question. i think its normal.

mine does the EXACT same thing.. in 1st gear when i ride the clutch a bit to start a stop sign or pull into parking it makes a grinding noise.. i guess is everyone's does it, it isnt to bad

also, if you give it some gas a bit above 1k rpm you wont get that rattle when letting off the clutch as bad.

here is a video of the rattle on turn off.

Malek · 10-12-2008, 10:39 PM

It is the dual mass setup and setup of the flywheel and pressure plate. If the clutch is depressed, it will make zero noise as others have already mentioned.

Its normal. The sound is a result of the motor being shut down or spun at a extremely low speed (normally experienced by stalling or engine shut down) where the inertial mass of the system is going in its intended direction, and once it comes to a stop, the internal springs of the dual mass "cocks back" and makes a rattle type of sound.

09-19-2008, 10:55 AM	#24
sd390r Lieutenant Colonel Drives: AW M3 Join Date: Aug 2008 Location: North Jersey Posts: 1,661 iTrader: (9) Garage List 2008 E90 335i [0.00]	yup... turning the car off with the clutch in and havent heard it since... except if your trying to shift at very low speeds -_- no tricks for that i guess... people always think i destroyed my clutch and i have to explain to them __________________ 2008 E90 M3 - Sold 2006 Evo IX SE - Sold 2008 E90 335i - Sold

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09-18-2008, 11:24 PM	#23
Kris Colonel Drives: m3 Join Date: Jun 2008 Location: USOFA Posts: 2,295 iTrader: (0)	+34324 Its actually the gearbox input shaft, and is by design. Shut the car down with clutch in. Thats how you stop it.

10-12-2008, 10:39 PM	#26
Malek Colonel Drives: E92 ZCP Melbourne 6MT Join Date: Jan 2008 Location: Irvine, California Posts: 2,810 iTrader: (5)	It is the dual mass setup and setup of the flywheel and pressure plate. If the clutch is depressed, it will make zero noise as others have already mentioned. Its normal. The sound is a result of the motor being shut down or spun at a extremely low speed (normally experienced by stalling or engine shut down) where the inertial mass of the system is going in its intended direction, and once it comes to a stop, the internal springs of the dual mass "cocks back" and makes a rattle type of sound.