Loud whining noise on cold start, goes away when driving.

M3MorganAUS · 02-14-2024, 05:00 PM

Hi guys,

Recently had the plenum off last week and yesterday this loud whining noise started. sounds like the air injection pump or one of the related hoses. Please see the attached video and let me know what you think.

https://youtube.com/shorts/zyYqnNRgWZA?feature=share

kolosy · 02-14-2024, 05:14 PM

i ... don't hear a whine?

Redd · 02-14-2024, 06:10 PM

Sounds more like a metallic vibration. Check your exhaust heat shields under the car, both front and back.

spammysammich · 02-14-2024, 06:27 PM

Quote:

Originally Posted by Redd

Sounds more like a metallic vibration. Check your exhaust heat shields under the car, both front and back.

also this?

M3MorganAUS · 02-14-2024, 09:20 PM

Quote:

Originally Posted by spammysammich

also this?

The noise is more present towards middle of video.

Very aware of the exhaust noise.

amrazM · 02-15-2024, 05:09 AM

Secondary air pump, unplug it see if the noise goes away.

02-14-2024, 05:00 PM	#1
M3MorganAUS New Member 0 Rep 13 Posts Drives: BMW E90 M3 M-DCT Join Date: Dec 2023 Location: Australia iTrader: (0)	Loud whining noise on cold start, goes away when driving. Hi guys, Recently had the plenum off last week and yesterday this loud whining noise started. sounds like the air injection pump or one of the related hoses. Please see the attached video and let me know what you think. https://youtube.com/shorts/zyYqnNRgWZA?feature=share
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02-14-2024, 05:14 PM	#2
kolosy Colonel 1550 Rep 2,074 Posts Drives: over potholes Join Date: Dec 2008 Location: Chicago iTrader: (2)	i ... don't hear a whine? __________________ Current '21 DG X5MC, '22 X5M50i, '11 E90 M3 Recent Past '12 E92 M3 ZCP, '08 E93 M3, '18 F80 ZCP, '04 E46 M3 I think I have an M3 problem.
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02-14-2024, 06:10 PM	#3
Redd Brigadier General 3917 Rep 4,180 Posts Drives: 2010 BMW E92 M3 Dakar Edition Join Date: Jul 2015 Location: Malaysia iTrader: (0)	Sounds more like a metallic vibration. Check your exhaust heat shields under the car, both front and back.
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02-15-2024, 05:09 AM	#6
amrazM mTekMods 2164 Rep 2,915 Posts Drives: like a granny. Join Date: Jan 2010 Location: Manhatan iTrader: (1)	Secondary air pump, unplug it see if the noise goes away. __________________ 2011 Frozen Black/Fox Red E90 M3 650+WHP G-Power Supercharged First DCT to Manual Conversion Worldwide KW CS, BBS RI-A, BW Headers, Snow 2.5
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