Weird noise coming from engine bay

Aim.F32 · 02-24-2024, 12:01 PM

It's around 4c here but had this noise on start up and was still having the same noise after a 5-10min drive.

Miles: 44500

https://youtube.com/shorts/X_s3y31xmuk?feature=share

Any guesses?

Fred Conoway · 02-24-2024, 02:25 PM

Sounds external to the engine, almost like a rattling heat shield

David1 · 02-24-2024, 03:54 PM

That’s no heat shield rattle. That’s either the death rattle or maybe belt tensioner flapping around. No matter what that’s not a go drive me sound.

Aim.F32 · 02-25-2024, 07:23 AM

I've got fully comprehensive extended warranty on the car so going to take it to main dealership. I hope it can be driven another 10 - 50 miles (depending on dealership availability).

Hoping I can get this resolved soon.

Andrew2 · 02-25-2024, 09:54 AM

Get it recovered to the dealer

m2ss · 02-25-2024, 12:19 PM

Quote:

Originally Posted by David1

That’s no heat shield rattle. That’s either the death rattle or maybe belt tensioner flapping around. No matter what that’s not a go drive me sound.

What is the "death rattle"?

Inquiry minds want to know...

David1 · 02-25-2024, 02:40 PM

The sound before it goes boom, and locks up.

chris719 · 02-25-2024, 05:42 PM

Quote:

Originally Posted by m2ss

What is the "death rattle"?

Inquiry minds want to know...

He’s probably referring to rod knock. This sounds bad but I’m not sure it’s rod knock.

Maynard · 02-26-2024, 07:04 AM

I thought the 'death rattle' was when the turbo WG was about to blow apart? Or when VANOS gets way out of whack?

MooMooM2 · 02-29-2024, 05:54 AM

where is it coming from exactly? I am with whoever says it sounds external like something is rattling against something else. But without really getting in there it will be impossible to know. You have the warranty so definitely take it in. Do come back here and let us know what it was

Aim.F32 · 03-01-2024, 02:23 PM

Sounds like it is coming from outside the engine, near the alternator - perhaps the belt? It is booked in next week. Will keep everyone posted.

Also worth mentioning that I do not have any engine warning lights.

MooMooM2 · 03-01-2024, 04:48 PM

Quote:

Originally Posted by Aim.F32

Sounds like it is coming from outside the engine, near the alternator - perhaps the belt? It is booked in next week. Will keep everyone posted.

Also worth mentioning that I do not have any engine warning lights.

yeah it could also be tensioner pulley which is next to the alternator.

Aim.F32 · 03-22-2024, 03:36 PM

Forgot to update - the culprit was the tension pulley. They replaced that, the alternator and belt. Warranty covered most of the costs, I just paid for the belt and excess.

IcewaterPete · 03-26-2024, 09:54 PM

Glad to hear that’s all it was and you are back to enjoying the car.

MooMooM2 · 03-27-2024, 09:28 AM

nice!

02-24-2024, 12:01 PM	#1
Aim.F32 Second Lieutenant 304 Rep 271 Posts Drives: SO M2C Join Date: Oct 2018 Location: UK iTrader: (0)	Weird noise coming from engine bay It's around 4c here but had this noise on start up and was still having the same noise after a 5-10min drive. Miles: 44500 https://youtube.com/shorts/X_s3y31xmuk?feature=share Any guesses? __________________ Instagram: m2c_sxm
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02-24-2024, 02:25 PM	#2
Fred Conoway Second Lieutenant 365 Rep 210 Posts Drives: 2021 F87 M2 Competition Join Date: May 2021 Location: Detroit, MI iTrader: (0) Garage List 2021 BMW M2 Competi ... [0.00]	Sounds external to the engine, almost like a rattling heat shield __________________ 2021 F87 M2 Competition, Sunset Orange, 6-speed 2010 E60 535i xDrive, Space Gray, Auto (sold, but still in the family)
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02-24-2024, 03:54 PM	#3
David1 Brigadier General 814 Rep 3,953 Posts Drives: 09 E92 09 X5 Join Date: Mar 2007 Location: Columbus, OH iTrader: (1)	That’s no heat shield rattle. That’s either the death rattle or maybe belt tensioner flapping around. No matter what that’s not a go drive me sound. __________________ 2021 M2 Comp Sunset Orange \|Black with orange Stitching Dakota Leather\|Executive Pkg\|DCT
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02-25-2024, 07:23 AM	#4
Aim.F32 Second Lieutenant 304 Rep 271 Posts Drives: SO M2C Join Date: Oct 2018 Location: UK iTrader: (0)	I've got fully comprehensive extended warranty on the car so going to take it to main dealership. I hope it can be driven another 10 - 50 miles (depending on dealership availability). Hoping I can get this resolved soon. __________________ Instagram: m2c_sxm
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02-25-2024, 09:54 AM	#5
Andrew2 Private 180 Rep 96 Posts Drives: M2 OG DCT Join Date: Dec 2023 Location: Aberdeenshire iTrader: (0)	Get it recovered to the dealer __________________ 2017 M2 2000 B5 S4 Avant 1982 Mk1 Golf GTI
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02-25-2024, 02:40 PM	#7
David1 Brigadier General 814 Rep 3,953 Posts Drives: 09 E92 09 X5 Join Date: Mar 2007 Location: Columbus, OH iTrader: (1)	The sound before it goes boom, and locks up. __________________ 2021 M2 Comp Sunset Orange \|Black with orange Stitching Dakota Leather\|Executive Pkg\|DCT
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02-26-2024, 07:04 AM	#9
Maynard Colonel 3848 Rep 2,873 Posts Drives: 228iX & M2C Join Date: Mar 2016 Location: Upstate NY iTrader: (1)	I thought the 'death rattle' was when the turbo WG was about to blow apart? Or when VANOS gets way out of whack? Last edited by Maynard; 03-22-2024 at 05:24 PM..
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02-29-2024, 05:54 AM	#10
MooMooM2 Lieutenant Colonel 1818 Rep 1,610 Posts Drives: M2 Comp Join Date: Apr 2021 Location: NY iTrader: (2)	where is it coming from exactly? I am with whoever says it sounds external like something is rattling against something else. But without really getting in there it will be impossible to know. You have the warranty so definitely take it in. Do come back here and let us know what it was
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03-01-2024, 02:23 PM	#11
Aim.F32 Second Lieutenant 304 Rep 271 Posts Drives: SO M2C Join Date: Oct 2018 Location: UK iTrader: (0)	Sounds like it is coming from outside the engine, near the alternator - perhaps the belt? It is booked in next week. Will keep everyone posted. Also worth mentioning that I do not have any engine warning lights. __________________ Instagram: m2c_sxm
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03-22-2024, 03:36 PM	#13
Aim.F32 Second Lieutenant 304 Rep 271 Posts Drives: SO M2C Join Date: Oct 2018 Location: UK iTrader: (0)	Forgot to update - the culprit was the tension pulley. They replaced that, the alternator and belt. Warranty covered most of the costs, I just paid for the belt and excess.
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03-26-2024, 09:54 PM	#14
IcewaterPete Lieutenant Colonel 2142 Rep 1,528 Posts Drives: 2020 F33 M Sport, 2021 M2C 6MT Join Date: Sep 2020 Location: Illinois iTrader: (0)	Glad to hear that’s all it was and you are back to enjoying the car.
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03-27-2024, 09:28 AM	#15
MooMooM2 Lieutenant Colonel 1818 Rep 1,610 Posts Drives: M2 Comp Join Date: Apr 2021 Location: NY iTrader: (2)	nice!
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