new engine sound?

monkeyboy · 04-08-2019, 02:06 PM

2011 328xi 80K miles 6MT

The engine recently started making a new whining sound, like a med-high pitched whrrl. It is definitely correlated with engine RPMs, not speed, transmission state, etc. A belt? other ideas? should I try to hunt it done or leave it be?

MartinWake · 04-08-2019, 04:54 PM

Can you record a video of the sound?

Schmitz · 04-08-2019, 05:26 PM

Did you use a non oem oil filter? I just had a whine that changed with rpms. Video would be best though...

monkeyboy · 04-08-2019, 10:10 PM

Quote:

Originally Posted by Schmitz

Did you use a non oem oil filter? I just had a whine that changed with rpms. Video would be best though...

I'll try to record... yes probably a non-OEM oil filter, put in maybe 4 months ago. This new sound started maybe a week ago.

Spacecpe · 04-08-2019, 10:46 PM

Could be related to the serpentine belt components (belt and pulleys)

monkeyboy · 04-12-2019, 03:13 PM

ok, recorded the sounds. I hope it is clear enough...

the sound gets more pronounced (or different) if I engage the heating fan.

thx

http://www.tsolab.org/tmp/bmw0.m4a

http://www.tsolab.org/tmp/bmw0.m4a

Volasko · 04-12-2019, 03:26 PM

Quote:

Originally Posted by monkeyboy

ok, recorded the sounds. I hope it is clear enough...

the sound gets more pronounced (or different) if I engage the heating fan.

thx

http://www.tsolab.org/tmp/bmw0.m4a

http://www.tsolab.org/tmp/bmw0.m4a

I couldn't hear it....

Schmitz · 04-12-2019, 07:41 PM

Does it sound like this?

monkeyboy · 04-12-2019, 09:41 PM

Quote:

Originally Posted by Schmitz

Does it sound like this?

no it doesn't... the sound is subtle to be sure, but definitely a change from a month ago...

and it is much more prominent when I turn on the heater/fan.

while it is strongly correlated to engine RPM (higher RPM, the louder and higher pitch it is), there is a tiny bit of lag relative to the actual engine.

It is most noticed at the end of the first recording...

Welcome to NBA Jam · 04-12-2019, 09:43 PM

Quote:

Originally Posted by monkeyboy

no it doesn't... the sound is subtle to be sure, but definitely a change from a month ago...

and it is much more prominent when I turn on the heater/fan.

while it is strongly correlated to engine RPM (higher RPM, the louder and higher pitch it is), there is a tiny bit of lag relative to the actual engine.

To me that sounds like a belt or pulley. 80k miles is about the time you'd expect to hear those noises.

04-08-2019, 02:06 PM	#1
monkeyboy Private First Class 13 Rep 105 Posts Drives: 2007 E90 328xi Join Date: Jun 2008 Location: Upstate NY iTrader: (0)	2011 328xi 80K miles 6MT The engine recently started making a new whining sound, like a med-high pitched whrrl. It is definitely correlated with engine RPMs, not speed, transmission state, etc. A belt? other ideas? should I try to hunt it done or leave it be? Last edited by monkeyboy; 04-08-2019 at 02:20 PM..
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04-08-2019, 04:54 PM	#2
MartinWake Lieutenant 80 Rep 414 Posts Drives: CL55 AMG Join Date: Nov 2018 Location: Miami iTrader: (1) Garage List 2011 BMW 335i [0.00] 2016 BMW 320i [0.00]	Can you record a video of the sound?
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04-08-2019, 05:26 PM	#3
Schmitz Lieutenant 241 Rep 494 Posts Drives: e90 328i Join Date: Sep 2017 Location: Rhode Island iTrader: (0)	Did you use a non oem oil filter? I just had a whine that changed with rpms. Video would be best though...
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04-08-2019, 10:46 PM	#5
Spacecpe First Lieutenant 44 Rep 359 Posts Drives: E90 335i Msport Join Date: Sep 2014 Location: Winnipeg, Mb Canada iTrader: (0)	Could be related to the serpentine belt components (belt and pulleys)
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04-12-2019, 03:13 PM	#6
monkeyboy Private First Class 13 Rep 105 Posts Drives: 2007 E90 328xi Join Date: Jun 2008 Location: Upstate NY iTrader: (0)	ok, recorded the sounds. I hope it is clear enough... the sound gets more pronounced (or different) if I engage the heating fan. thx http://www.tsolab.org/tmp/bmw0.m4a http://www.tsolab.org/tmp/bmw0.m4a
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04-12-2019, 07:41 PM	#8
Schmitz Lieutenant 241 Rep 494 Posts Drives: e90 328i Join Date: Sep 2017 Location: Rhode Island iTrader: (0)	Does it sound like this?
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