whining noise under hood

pnastyFL · 09-23-2015, 10:16 AM

2011 335i x coupe (n55) after the car is running for a brief trip it starts to make a whining noise. it usually seems to occur after the rpms drop like when I am sitting at a red light, but it could be that it is drowned out while I am moving. It does not do it ALL the time when its just idling, but usually after even a short drive. can anyone give me an idea of what this is? video below

tmo24 · 09-23-2015, 10:52 PM

Quote:

Originally Posted by heavychevy69

2011 335i x coupe (n55) after the car is running for a brief trip it starts to make a whining noise. it usually seems to occur after the rpms drop like when I am sitting at a red light, but it could be that it is drowned out while I am moving. It does not do it ALL the time when its just idling, but usually after even a short drive. can anyone give me an idea of what this is? video below

I had a constant whining that I heard in my car. It happened while I was driving, at stop lights, with a/c on or off. It got louder the more I turned the radio up but the wine was still there if I turned the radio off. It was a constant whine that sounded like a dying cat. It was a simple fix. It went away the day I left my ex

:

lookalikehuuh · 09-24-2015, 04:46 AM

its difficult to tell without being there to try to determine what area the noise is coming from. I would start by checking the drive belt since that is the most likely culprit.

nate16 · 09-24-2015, 07:13 AM

mine makes a little whine noise but only on cold starts, it goes away once it's warmed up

Jsoboti · 09-24-2015, 07:51 AM

I'm having a very similar noise, seems to only happen when it's cooler outside. To me it sounds similar to the sound that people have reported on here that ended up being the crankshaft seal.

see this thread... http://www.e90post.com/forums/showthread.php?t=629612

Wilt · 09-24-2015, 08:48 AM

Rubber stretches when it is cold. A 'whining' when cold might indicate simply the need to adjust tension on the belt.

pnastyFL · 09-24-2015, 03:49 PM

Quote:

Originally Posted by tmo24

I had a constant whining that I heard in my car. It happened while I was driving, at stop lights, with a/c on or off. It got louder the more I turned the radio up but the wine was still there if I turned the radio off. It was a constant whine that sounded like a dying cat. It was a simple fix. It went away the day I left my ex

:

Lmao that must be what it is!! Thanks everybody, I saw that crankshaft seal thread I'm thinking that's what it is, if it was a belt wouldn't it be constant not just when the car is warm? The rubber doesn't get too cold it's 90 degrees here every day

pnastyFL · 09-27-2015, 04:21 PM

would I notice any oil or fluids leaking if it was the crank shaft seal? Also does anyone have an estimated cost of the job if thats what it is, want to prepare my wallet/anus before I take it in this week.

twinboost_MD · 09-28-2015, 10:32 AM

im almost sure its your idler pulley. mine broke in half last winter in my e46 m3 and was making a very similar noise

Jsoboti · 09-28-2015, 11:42 AM

Quote:

Originally Posted by twinboost93

im almost sure its your idler pulley. mine broke in half last winter in my e46 m3 and was making a very similar noise

Did you replace it yourself? I'm thinking I should do this preventatively since the car has 55k miles. Wondering how big of a job it is

humbertob · 09-28-2015, 12:01 PM

That sound is not coming from your crankshaft seal, it's more common to come from a pulley, and it's so easy to test if one of your pulleys is the culprit. With the engine running (idling) just put some water with the water hose on each of the pulleys, if the noise is gone, one or some of your pulleys need to be replaced.

pnastyFL · 09-28-2015, 12:15 PM

awesome thanks for the advice guys this is what i was looking for

pnastyFL · 09-28-2015, 12:17 PM

is this a reasonable DIY for the not so mechanically inclined?

Jsoboti · 09-28-2015, 09:29 PM

Mine is so rare, happens maybe once a month for a few minutes then disappears

pnastyFL · 10-03-2015, 01:48 PM

Well I was just told by the shop it is definitely coming from the transmission, trans guy isn't in today so it goes back monday. Any guesses? this sounds expensive, and its also progressed to be much louder and constant

Cashmancab · 10-13-2019, 11:43 AM

I know this is a real long shot since this is an old post but what was the diagnosis and fix. I have the exact same noise.

colorado.e9x · 10-13-2019, 02:57 PM

Quote:

Originally Posted by Cashmancab

I know this is a real long shot since this is an old post but what was the diagnosis and fix. I have the exact same noise.

Don't worry it's just the supercharger

Tambohamilton · 10-13-2019, 03:56 PM

Quote:

Originally Posted by Wilt

Rubber stretches when it is cold. A 'whining' when cold might indicate simply the need to adjust tension on the belt.

This is my favourite response. Absolute gold.

relative4 · 10-13-2019, 09:50 PM

Quote:

Originally Posted by Tambohamilton

Quote:

Originally Posted by Wilt

Rubber stretches when it is cold. A 'whining' when cold might indicate simply the need to adjust tension on the belt.

This is my favourite response. Absolute gold.

Yeah wow, that was some serious ignorance there.

Cashmancab · 10-19-2019, 09:16 PM

So the noise comes from the valvetronic system. I bought a Foxwell NT510 and it showed a valvetronic error. The NT510 has a valvetronic "learning" function. Ran the test and the noise immediately went away. Its possible it might rear its ugly head again but at least I know what it is. The NT510 has already paid for itself.

Moonchildproject · 03-09-2023, 05:55 PM

I have exact same wining noise started coming today driving. So what was the problem ?

09-23-2015, 10:16 AM	#1
pnastyFL Second Lieutenant 43 Rep 269 Posts Drives: .. Join Date: Dec 2013 Location: SRQ-ORLANDO iTrader: (2)	whining noise under hood 2011 335i x coupe (n55) after the car is running for a brief trip it starts to make a whining noise. it usually seems to occur after the rpms drop like when I am sitting at a red light, but it could be that it is drowned out while I am moving. It does not do it ALL the time when its just idling, but usually after even a short drive. can anyone give me an idea of what this is? video below
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09-24-2015, 04:46 AM	#3
lookalikehuuh Major 700 Rep 1,227 Posts Drives: 2006 330i, 2007 335i Join Date: Sep 2014 Location: San Diego, CA iTrader: (0)	its difficult to tell without being there to try to determine what area the noise is coming from. I would start by checking the drive belt since that is the most likely culprit.
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09-24-2015, 07:13 AM	#4
nate16 Banned 172 Rep 327 Posts Drives: 2017 F80 YMB ZCP Join Date: Sep 2015 Location: Peabody, MA iTrader: (1)	mine makes a little whine noise but only on cold starts, it goes away once it's warmed up
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09-24-2015, 07:51 AM	#5
Jsoboti Lieutenant 28 Rep 583 Posts Drives: 2011 335i E92 M-Sport 6MT Join Date: May 2014 Location: Mississippi iTrader: (0)	I'm having a very similar noise, seems to only happen when it's cooler outside. To me it sounds similar to the sound that people have reported on here that ended up being the crankshaft seal. see this thread... http://www.e90post.com/forums/showthread.php?t=629612 __________________ JB4 G5 ISO FF \| BMS Performance Intake \| BMS Wheel Spacers \| VRSF Catless DP \| Red CYBA Scoops \| Supreme Power Lowering Perches \| VRSF Charge Pipe \| VMR 810 19x8.5 ET35 19x9.5 ET33 \| Michelin PSS 235/265 \| BMS CDV \| BMS Clutch Stop \| 4'' Tips Last edited by Jsoboti; 09-24-2015 at 08:02 AM..
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09-24-2015, 08:48 AM	#6
Wilt Major 228 Rep 1,041 Posts Drives: 2011 328i Join Date: Mar 2015 Location: SF Bay area iTrader: (0)	Rubber stretches when it is cold. A 'whining' when cold might indicate simply the need to adjust tension on the belt.
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09-27-2015, 04:21 PM	#8
pnastyFL Second Lieutenant 43 Rep 269 Posts Drives: .. Join Date: Dec 2013 Location: SRQ-ORLANDO iTrader: (2)	would I notice any oil or fluids leaking if it was the crank shaft seal? Also does anyone have an estimated cost of the job if thats what it is, want to prepare my wallet/anus before I take it in this week.
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09-28-2015, 10:32 AM	#9
twinboost_MD Private First Class 19 Rep 188 Posts Drives: AW 135i Join Date: Feb 2015 Location: Washington, DC iTrader: (0)	im almost sure its your idler pulley. mine broke in half last winter in my e46 m3 and was making a very similar noise
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09-28-2015, 12:01 PM	#11
humbertob First Lieutenant 132 Rep 318 Posts Drives: '16 BMW M235i Join Date: Jan 2013 Location: Laredo, Tx. iTrader: (0)	That sound is not coming from your crankshaft seal, it's more common to come from a pulley, and it's so easy to test if one of your pulleys is the culprit. With the engine running (idling) just put some water with the water hose on each of the pulleys, if the noise is gone, one or some of your pulleys need to be replaced. __________________ (OO)-(////)(\\\\)-(OO) '16 F22 M235i '19 G01 X3 \| Wife's '15 F30 335i M-Sport \| Son's '10 Porsche Boxster
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09-28-2015, 12:15 PM	#12
pnastyFL Second Lieutenant 43 Rep 269 Posts Drives: .. Join Date: Dec 2013 Location: SRQ-ORLANDO iTrader: (2)	awesome thanks for the advice guys this is what i was looking for
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09-28-2015, 12:17 PM	#13
pnastyFL Second Lieutenant 43 Rep 269 Posts Drives: .. Join Date: Dec 2013 Location: SRQ-ORLANDO iTrader: (2)	is this a reasonable DIY for the not so mechanically inclined?
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09-28-2015, 09:29 PM	#14
Jsoboti Lieutenant 28 Rep 583 Posts Drives: 2011 335i E92 M-Sport 6MT Join Date: May 2014 Location: Mississippi iTrader: (0)	Mine is so rare, happens maybe once a month for a few minutes then disappears __________________ JB4 G5 ISO FF \| BMS Performance Intake \| BMS Wheel Spacers \| VRSF Catless DP \| Red CYBA Scoops \| Supreme Power Lowering Perches \| VRSF Charge Pipe \| VMR 810 19x8.5 ET35 19x9.5 ET33 \| Michelin PSS 235/265 \| BMS CDV \| BMS Clutch Stop \| 4'' Tips
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10-03-2015, 01:48 PM	#15
pnastyFL Second Lieutenant 43 Rep 269 Posts Drives: .. Join Date: Dec 2013 Location: SRQ-ORLANDO iTrader: (2)	Well I was just told by the shop it is definitely coming from the transmission, trans guy isn't in today so it goes back monday. Any guesses? this sounds expensive, and its also progressed to be much louder and constant
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10-13-2019, 11:43 AM	#16
Cashmancab Registered 0 Rep 2 Posts Drives: 95 M3, 2002 M3, 2011 335I Join Date: Oct 2019 Location: Charlotte, NC iTrader: (0)	I know this is a real long shot since this is an old post but what was the diagnosis and fix. I have the exact same noise.
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10-19-2019, 09:16 PM	#20
Cashmancab Registered 0 Rep 2 Posts Drives: 95 M3, 2002 M3, 2011 335I Join Date: Oct 2019 Location: Charlotte, NC iTrader: (0)	So the noise comes from the valvetronic system. I bought a Foxwell NT510 and it showed a valvetronic error. The NT510 has a valvetronic "learning" function. Ran the test and the noise immediately went away. Its possible it might rear its ugly head again but at least I know what it is. The NT510 has already paid for itself.
	Appreciate 0 Quote

03-09-2023, 05:55 PM	#21
Moonchildproject Registered 0 Rep 1 Posts Drives: BMW x5 335x Join Date: Mar 2023 Location: Calgary iTrader: (0)	I have exact same wining noise started coming today driving. So what was the problem ?
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