Cold start whine?

muzik · 02-19-2017, 12:18 PM

Could anyone please give a listen to this clip and tell me what they think? It only happens on a cold start, the noise will go away after about 10 seconds from starting and won't occur again while the car is warmed up.

https://youtu.be/6MqBt-JcEQ0

Thanks in advance.

jiggz · 02-19-2017, 01:10 PM

Have you checked here?

http://www.m3post.com/forums/showthr...=Common+sounds

muzik · 02-19-2017, 01:34 PM

Quote:

Originally Posted by jiggz

Have you checked here?

http://www.m3post.com/forums/showthr...=Common+sounds

Thanks. I've tried searching for a similar sound but I'll try going through and posting in that thread as well.

I replaced the idler pulley after seeing some threads that mentioned that being an issue. Also kept and eye on the power steering levels, but I haven't flushed the fluids yet.

monterey · 02-19-2017, 01:48 PM

That sounds awful. I wouldn't be driving it until you find the cause.

///M Power-Belgium · 02-19-2017, 02:43 PM

Quote:

Originally Posted by muzik

Could anyone please give a listen to this clip and tell me what they think? It only happens on a cold start, the noise will go away after about 10 seconds from starting and won't occur again while the car is warmed up.

https://youtu.be/6MqBt-JcEQ0

Thanks in advance.

WTF is this my friend ? WOW ! My ears are bleeding !

I never heard this before on a S65 !
Personal I think (not sure) it comes from the Vanos-Gears , because you say it happens only on a cold start ..

Advice :
Call your nearest BMW/Dealer ASAP , and don't push your start button anymore!
This sounds absolutely not healty !
Let us further know how it goes..

Denk · 02-19-2017, 03:02 PM

Holy shit batman, sounds like a gerbil climbed up in there. Haven't heard that before, good luck and keep us posted.

///M Power-Belgium · 02-19-2017, 03:11 PM

Quote:

Originally Posted by Denk

Holy shit batman, sounds like a gerbil climbed up in there. Haven't heard that before, good luck and keep us posted.

Yeah..My ears are still bleeding with my headphone on !
In short ...WOW !

///M Power-Belgium · 02-20-2017, 07:22 PM

Quote:

Originally Posted by muzik

Could anyone please give a listen to this clip and tell me what they think? It only happens on a cold start, the noise will go away after about 10 seconds from starting and won't occur again while the car is warmed up.

https://youtu.be/6MqBt-JcEQ0

Thanks in advance.

Any updates about your extreme situation ?

muzik · 02-20-2017, 08:20 PM

Fixing to get it into the shop this week. I'll be sure to update when I know more. Thanks for the advice.

Rajmun340 · 02-20-2017, 08:28 PM

had my steering pump + idle pulley replaced and can tell you it does not sound like this at all and also should not go away after car is warm. This sounds much worse but i don't think it's anything directly in the engine.

eyanez1230 · 02-21-2017, 02:03 AM

Check your power steering fluid to make sure it's not low. I had something similar and was low on power steering fluid so just top it off.

///M Power-Belgium · 02-21-2017, 04:18 AM

Quote:

Originally Posted by muzik

Fixing to get it into the shop this week. I'll be sure to update when I know more. Thanks for the advice.

Roger that.Please keep us posted ...

suk610e92 · 05-09-2022, 12:16 PM

Quote:

Originally Posted by muzik

Fixing to get it into the shop this week. I'll be sure to update when I know more. Thanks for the advice.

Super old thread but did you ever find the issue ? Experiencing this same noise

blowbackpolicy · 06-15-2022, 12:31 PM

Any updates on this? I am having a similar noise.

Jastreb · 06-15-2022, 02:30 PM

To me this sounds like the secondary air pump bearing. The secondary air pump (or whatever it's called on our cars) is used during cold starts to help warm up the catalytic converter(s). It pumps extra air into the exhaust manifold at the same time the mixture is set to be extra rich, so the extra fuel will light off in the cat. This lasts about 10 seconds on a cold start.

This was a common issue on my previous car (Mazda RX-8). Typically, this system is used on cars where the catalytic converter is a ways away from the headers to help meet environmental regs. On cars where the catalytic converter is closely coupled or integrated with the header, such as FWD with transverse mounted engine, this is not necessary.

Bimmer Barney · 06-15-2022, 03:27 PM

I have this sound now and almost certain it's related to the secondary air pump but I don't know the solution yet

suk610e92 · 06-30-2022, 10:51 PM

Quote:

Originally Posted by Bimmer Barney

I have this sound now and almost certain it's related to the secondary air pump but I don't know the solution yet

I had a very similar noise and it was my idler pulley

asma123 · 07-01-2022, 01:26 AM

Tbh I think it sounds like the secondary air pump. You can try and unplug it and see if noise is still there but you’ll need to remove the plenum to do that since it sits at the very back on top

02-19-2017, 12:18 PM	#1
muzik New Member 3 Rep 5 Posts Drives: 2012 E92 M3 Join Date: Feb 2016 Location: Houston, TX iTrader: (0)	Cold start whine? Could anyone please give a listen to this clip and tell me what they think? It only happens on a cold start, the noise will go away after about 10 seconds from starting and won't occur again while the car is warmed up. https://youtu.be/6MqBt-JcEQ0 Thanks in advance.
	Appreciate 1 ///M Power-Belgium63343.00 Tweet Quote

02-19-2017, 01:10 PM	#2
jiggz Brigadier General 2141 Rep 3,647 Posts Drives: E90 M3\|F15 X5 50i Join Date: Mar 2005 Location: Seattle iTrader: (2)	Have you checked here? http://www.m3post.com/forums/showthr...=Common+sounds
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02-19-2017, 01:48 PM	#4
monterey Major 339 Rep 1,239 Posts Drives: 2008 M3 Join Date: Mar 2016 Location: United States iTrader: (1)	That sounds awful. I wouldn't be driving it until you find the cause.
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02-19-2017, 03:02 PM	#6
Denk Brigadier General 1006 Rep 3,341 Posts Drives: 2021 X5M Join Date: May 2011 Location: PNW iTrader: (2)	Holy shit batman, sounds like a gerbil climbed up in there. Haven't heard that before, good luck and keep us posted.
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02-20-2017, 08:20 PM	#9
muzik New Member 3 Rep 5 Posts Drives: 2012 E92 M3 Join Date: Feb 2016 Location: Houston, TX iTrader: (0)	Fixing to get it into the shop this week. I'll be sure to update when I know more. Thanks for the advice.
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02-20-2017, 08:28 PM	#10
Rajmun340 Major 413 Rep 1,178 Posts Drives: 2013 E92 M3 ZCP factory order Join Date: Sep 2015 Location: NC iTrader: (0)	had my steering pump + idle pulley replaced and can tell you it does not sound like this at all and also should not go away after car is warm. This sounds much worse but i don't think it's anything directly in the engine.
	Appreciate 0 Quote

02-21-2017, 02:03 AM	#11
eyanez1230 Private First Class 44 Rep 145 Posts Drives: 2013 E92 M3 ZCP Join Date: Jan 2016 Location: Los Angeles iTrader: (0)	Check your power steering fluid to make sure it's not low. I had something similar and was low on power steering fluid so just top it off.
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06-15-2022, 12:31 PM	#14
blowbackpolicy Private First Class 94 Rep 114 Posts Drives: e92 M3 Join Date: Jan 2017 Location: Texas iTrader: (0)	Any updates on this? I am having a similar noise. __________________ ARC-8 Wheels - Stoptech Trophy BBK - Solid Subframe Bushings - Purple Diff Bushings - Topspeed X-pipe - Megan Catback - AFE Carbon Intake - RE Pullies - BPM Tune - GAS Monoballs - ECS Front Sway - GTS Wing - Autosolutions SSK - Vibratechnics Motor Mounts - Revshift Tranny Mounts - VAC Bearings - Bilstein PSS10 Coilovers - Dinan Camber Plates - Ultra Front Strut Bar - BSW Ghost Subs - Matek Diffuser
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06-15-2022, 02:30 PM	#15
Jastreb Downshifting 6 Rep 15 Posts Drives: 2010 E92 BMW M3, DCT Join Date: Apr 2021 Location: S.E. Michigan iTrader: (0)	To me this sounds like the secondary air pump bearing. The secondary air pump (or whatever it's called on our cars) is used during cold starts to help warm up the catalytic converter(s). It pumps extra air into the exhaust manifold at the same time the mixture is set to be extra rich, so the extra fuel will light off in the cat. This lasts about 10 seconds on a cold start. This was a common issue on my previous car (Mazda RX-8). Typically, this system is used on cars where the catalytic converter is a ways away from the headers to help meet environmental regs. On cars where the catalytic converter is closely coupled or integrated with the header, such as FWD with transverse mounted engine, this is not necessary.
	Appreciate 1 SkiFly01101.50 Quote

06-15-2022, 03:27 PM	#16
Bimmer Barney Lieutenant Colonel 1250 Rep 1,502 Posts Drives: 2011.5 E90M ZCP Join Date: Jan 2011 Location: California iTrader: (4)	I have this sound now and almost certain it's related to the secondary air pump but I don't know the solution yet __________________ 2011.5 E90 M3 DCT ZCP Slicktop
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07-01-2022, 01:26 AM	#18
asma123 Private First Class 185 Rep 123 Posts Drives: E92 M3, 5G 4Runner, 9G Civic Join Date: Dec 2017 Location: Canada iTrader: (0)	Tbh I think it sounds like the secondary air pump. You can try and unplug it and see if noise is still there but you’ll need to remove the plenum to do that since it sits at the very back on top
	Appreciate 0 Quote