Rattling sound at idle - BMW 3-Series (E90 E92) Forum

Beemw335 · 01-25-2012, 10:06 PM

Ive had this sound while at idle for a little while now, usually only apparent while car is cold but its annoying.
Heres a video I took a while back, wasnt very loud but you can definetly hear it in the begining of the video. I didnt post it since the sound stopped but now it seems to have come back. Once i touch the gas it completely goes away..its weird
Any ideas?

Beemw335 · 01-25-2012, 11:46 PM

Cmon guys, any ideas?

E90SoFlo · 01-26-2012, 12:07 AM

waste gates possibly?

medvec04 · 01-26-2012, 12:14 AM

The video is kinda short but it sounds like wastegate rattle

Beemw335 · 01-26-2012, 12:16 AM

Well I know that if you have wg rattle. Put car in neutral rev to 5 k and when you let go of throttle you should hear the rattle.
Well this is only heard whil at idle, its weird. I have an even older video this time is was very loud.

Please turn up volume since video was shot from my phone.

thwgw24 · 01-26-2012, 01:48 AM

Not the WG rattle for sure.

Quote:

Originally Posted by Beemw335

Well I know that if you have wg rattle. Put car in neutral rev to 5 k and when you let go of throttle you should hear the rattle.
Well this is only heard whil at idle, its weird. I have an even older video this time is was very loud.

Please turn up volume since video was shot from my phone.

kiteboy · 01-26-2012, 06:04 AM

Quote:

Originally Posted by thwgw24

Not the WG rattle for sure.

this noise is not wastegate rattle !!!

cyman83 · 01-26-2012, 08:14 AM

Quote:

Originally Posted by kiteboy

this noise is not wastegate rattle !!!

and thats what he said?

Beemw335 · 01-26-2012, 02:11 PM

Any ideas what it could be?

Beemw335 · 01-26-2012, 05:52 PM

To the top!
I really need to figure this out, any jdeas would help.

Beemw335 · 01-27-2012, 12:07 AM

Gonna bump this one last time, I hope someone can help me out because I know I f I bring it to the dealer theyre gonna tell me they couldnt reproduce the issue...so anyone?

TXTT · 01-27-2012, 01:23 AM

look for loose change.

aj335i · 10-12-2012, 03:08 PM

anybody know what this is? Mine is making this noise from time to time

E90Company · 10-12-2012, 03:19 PM

Sounds like a loose motor mount if it goes away when you increase the rpm

Beemw335 · 10-13-2012, 12:29 PM

Since making this thread mine seemed to stop.
Well see if it comes back with the cold weather..(it started doing this during the winter)

Duke · 10-13-2012, 12:59 PM

mine does the same exact thing

n54door · 10-13-2012, 04:33 PM

is your a/c on? if so turn it off and see if still makes the sound. Inspect your belts too... sounds like a rotating noise to me.

Spoolin Montego · 10-13-2012, 06:18 PM

Do you have aftermarket downpipes?

aj335i · 10-15-2012, 09:39 PM

No, this noise is keeping me from installing it. At first I thought it happened with the A/C but now it does it all the time. It happens for about 5 seconds whenever I come to a stop and it goes away as soon as I start. The car also seems to make a faint squeaking noise at idle and I don't know if the two are related.

Duke · 10-16-2012, 02:56 AM

Quote:

Originally Posted by aj335i

No, this noise is keeping me from installing it. At first I thought it happened with the A/C but now it does it all the time. It happens for about 5 seconds whenever I come to a stop and it goes away as soon as I start. The car also seems to make a faint squeaking noise at idle and I don't know if the two are related.

My mods are:
- '08 6MT
-Cobb v40? Sport ST (latest version 402/403?) lol
- DCI
- AE catless DP back exhaust w/ vibrant resonators (1792)
- ETS 5" FMIC
Running on stock DPs

Do you have any mods to your exhaust? I started noticing the noise when I went to the AE exhaust. It started out as you said noticeable with the a/c but then now it's at a point where it's loud as eff all the time. I feel like it has something to do with the back pressure & how my worn out ass Wastegate actuator slop reacts to the OTS Cobb tune.

FWIW- On that note I went ahead and uninstalled/unmarried the Cobb for a couple of days and the noise went away

Duke · 10-16-2012, 02:35 PM

Bump

aj335i · 10-16-2012, 03:05 PM

Quote:

Originally Posted by Duke

My mods are:
- '08 6MT
-Cobb v40? Sport ST (latest version 402/403?) lol
- DCI
- AE catless DP back exhaust w/ vibrant resonators (1792)
- ETS 5" FMIC
Running on stock DPs

Do you have any mods to your exhaust? I started noticing the noise when I went to the AE exhaust. It started out as you said noticeable with the a/c but then now it's at a point where it's loud as eff all the time. I feel like it has something to do with the back pressure & how my worn out ass Wastegate actuator slop reacts to the OTS Cobb tune.

FWIW- On that note I went ahead and uninstalled/unmarried the Cobb for a couple of days and the noise went away

I have the golf tee mod but thats it. I also just realized that this is the n54 subsection and I have an n55, I just came across this while I was searching but I have the same problem :/. I'm planning to buy an exhaust and install them at the same time. It started out being the full time I was stopped but now it goes away after a couple seconds... I'm going to take my mods off and see what the dealership says.

01-25-2012, 10:06 PM	#1
Beemw335 Lieutenant Colonel Drives: 335i Join Date: Mar 2011 Location: My car is my home Posts: 1,980 iTrader: (2)	Rattling sound at idle Ive had this sound while at idle for a little while now, usually only apparent while car is cold but its annoying. Heres a video I took a while back, wasnt very loud but you can definetly hear it in the begining of the video. I didnt post it since the sound stopped but now it seems to have come back. Once i touch the gas it completely goes away..its weird Any ideas?
	Tweet

10-12-2012, 03:19 PM	#14
E90Company Major General Drives: 335i Join Date: Mar 2012 Location: SFL Posts: 5,554 iTrader: (2)	Sounds like a loose motor mount if it goes away when you increase the rpm __________________ FBO N54 6AT

10-13-2012, 06:18 PM	#18
Spoolin Montego Second Lieutenant Drives: 09 135i Join Date: Mar 2012 Location: Orange County Posts: 218 iTrader: (0)	Do you have aftermarket downpipes? __________________ 2009 135i 6 Speed \| aFe Downpipes \| Evolution Racewerks Intercooler \| aFe Dual Cone \| Cobb Stage 2+ \| Apex ARC8

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01-25-2012, 11:46 PM	#2
Beemw335 Lieutenant Colonel Drives: 335i Join Date: Mar 2011 Location: My car is my home Posts: 1,980 iTrader: (2)	Cmon guys, any ideas?

01-26-2012, 12:07 AM	#3
E90SoFlo Banned Drives: E90 335i Join Date: Jun 2011 Location: Naples, FL Posts: 2,682 iTrader: (9)	waste gates possibly?

01-26-2012, 12:14 AM	#4
medvec04 Second Lieutenant Drives: 07 silver 335i sedan Join Date: May 2011 Location: jacksonville, florida Posts: 270 iTrader: (4)	The video is kinda short but it sounds like wastegate rattle

01-26-2012, 12:16 AM	#5
Beemw335 Lieutenant Colonel Drives: 335i Join Date: Mar 2011 Location: My car is my home Posts: 1,980 iTrader: (2)	Well I know that if you have wg rattle. Put car in neutral rev to 5 k and when you let go of throttle you should hear the rattle. Well this is only heard whil at idle, its weird. I have an even older video this time is was very loud. Please turn up volume since video was shot from my phone.

01-26-2012, 02:11 PM	#9
Beemw335 Lieutenant Colonel Drives: 335i Join Date: Mar 2011 Location: My car is my home Posts: 1,980 iTrader: (2)	Any ideas what it could be?

01-26-2012, 05:52 PM	#10
Beemw335 Lieutenant Colonel Drives: 335i Join Date: Mar 2011 Location: My car is my home Posts: 1,980 iTrader: (2)	To the top! I really need to figure this out, any jdeas would help.

01-27-2012, 12:07 AM	#11
Beemw335 Lieutenant Colonel Drives: 335i Join Date: Mar 2011 Location: My car is my home Posts: 1,980 iTrader: (2)	Gonna bump this one last time, I hope someone can help me out because I know I f I bring it to the dealer theyre gonna tell me they couldnt reproduce the issue...so anyone?

01-27-2012, 01:23 AM	#12
TXTT Private First Class Drives: 335 Join Date: Sep 2011 Location: TEXAS Posts: 158 iTrader: (1)	look for loose change.

10-12-2012, 03:08 PM	#13
aj335i New Member Drives: 2011 E90 335i Join Date: Sep 2011 Location: Orange County, CA Posts: 13 iTrader: (0)	anybody know what this is? Mine is making this noise from time to time

10-13-2012, 12:29 PM	#15
Beemw335 Lieutenant Colonel Drives: 335i Join Date: Mar 2011 Location: My car is my home Posts: 1,980 iTrader: (2)	Since making this thread mine seemed to stop. Well see if it comes back with the cold weather..(it started doing this during the winter)

10-13-2012, 12:59 PM	#16
Duke Lieutenant Drives: E92 335i Join Date: Feb 2008 Location: The Hills next to CHINO Posts: 497 iTrader: (2)	mine does the same exact thing

10-13-2012, 04:33 PM	#17
n54door Lieutenant Drives: 2008 135i Join Date: Sep 2011 Location: DFW Posts: 443 iTrader: (4)	is your a/c on? if so turn it off and see if still makes the sound. Inspect your belts too... sounds like a rotating noise to me.

10-15-2012, 09:39 PM	#19
aj335i New Member Drives: 2011 E90 335i Join Date: Sep 2011 Location: Orange County, CA Posts: 13 iTrader: (0)	No, this noise is keeping me from installing it. At first I thought it happened with the A/C but now it does it all the time. It happens for about 5 seconds whenever I come to a stop and it goes away as soon as I start. The car also seems to make a faint squeaking noise at idle and I don't know if the two are related.

10-16-2012, 02:35 PM	#21
Duke Lieutenant Drives: E92 335i Join Date: Feb 2008 Location: The Hills next to CHINO Posts: 497 iTrader: (2)	Bump