start up noise

akuliest · 05-13-2011, 06:27 PM

hey guys i just purchased a used 2007 335i coupe 6mt (cant stop driving it!). unfortunately i noticed that when I start and stop the car i hear a noise, kind of like an old fan rattling? do you guys have that too?

ren · 05-13-2011, 07:32 PM

it's most likely the exhaust flap that rattles. You can disable it (golf tee mod) and check if you still hear the same noise.

marv85 · 05-13-2011, 10:04 PM

I think I have the same noise
I hear it only on startup or when I turn the car off. And if by mistake the engine is about to stall (manual trans). Seems to happen at very low toms. Kind of a clunking noise, right. Mine is definitely not the exhaust flap. I told my SA, they kept the car for two days and couldn't figure it out. But they assured it's nothing dangerous...
If someone knows what this is please chime in

marv85 · 05-13-2011, 10:05 PM

Toms is rpms . iPhone app won't let me edit...

O HELLA BMW · 05-13-2011, 10:07 PM

i had that same exhaust flap noise at startup, turns out my waste gates were bad, so BMW installed new wastegates and 2 brand new turbos

05-13-2011, 06:27 PM	#1
akuliest Private First Class 11 Rep 167 Posts Drives: 335i Black, Coral red interior Join Date: Apr 2011 Location: NOVA iTrader: (2)	start up noise hey guys i just purchased a used 2007 335i coupe 6mt (cant stop driving it!). unfortunately i noticed that when I start and stop the car i hear a noise, kind of like an old fan rattling? do you guys have that too?
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05-13-2011, 07:32 PM	#2
ren Captain 62 Rep 840 Posts Drives: 2024 X7 M60i Join Date: Jan 2007 Location: U.S. iTrader: (8)	it's most likely the exhaust flap that rattles. You can disable it (golf tee mod) and check if you still hear the same noise.
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05-13-2011, 10:04 PM	#3
marv85 Colonel 71 Rep 2,626 Posts Drives: '07 E92 335i MT Join Date: Jun 2010 Location: Bay Area iTrader: (7)	I think I have the same noise I hear it only on startup or when I turn the car off. And if by mistake the engine is about to stall (manual trans). Seems to happen at very low toms. Kind of a clunking noise, right. Mine is definitely not the exhaust flap. I told my SA, they kept the car for two days and couldn't figure it out. But they assured it's nothing dangerous... If someone knows what this is please chime in __________________ '18 F80 M3 Comp 6MT - Stock '07 E92 335i 6MT- HP650, inlets/outlets, ER FMIC, VRSF CP, LPFP stg2, CSF rad, 'is Aux rad, ER OC, Ohlins, M control arms, eibach front sway bar. '05 C55 AMG SOLD - '22 Tesla M3P \| '10 E92 335i M, 6MT \| '07 E90 335i, PTF COBB E50, FBO, HFS4
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05-13-2011, 10:05 PM	#4
marv85 Colonel 71 Rep 2,626 Posts Drives: '07 E92 335i MT Join Date: Jun 2010 Location: Bay Area iTrader: (7)	Toms is rpms . iPhone app won't let me edit... __________________ '18 F80 M3 Comp 6MT - Stock '07 E92 335i 6MT- HP650, inlets/outlets, ER FMIC, VRSF CP, LPFP stg2, CSF rad, 'is Aux rad, ER OC, Ohlins, M control arms, eibach front sway bar. '05 C55 AMG SOLD - '22 Tesla M3P \| '10 E92 335i M, 6MT \| '07 E90 335i, PTF COBB E50, FBO, HFS4
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05-13-2011, 10:07 PM	#5
O HELLA BMW I <3 My E93 185 Rep 3,259 Posts Drives: 12” 335is vert Join Date: Nov 2010 Location: PA iTrader: (21)	i had that same exhaust flap noise at startup, turns out my waste gates were bad, so BMW installed new wastegates and 2 brand new turbos __________________ Bagged and Wrapped E93 335i
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