Rattle sound on cold start

MattM240eye · 09-08-2022, 09:15 AM

Hadn't really noticed it before, but on a cold start, for about 5 seconds, there is a rattle from the engine bay somewhere. Anyone else notice it at all? Could be " BMW Normal ". But figured I'd ask

Rdurty2 · 09-08-2022, 09:38 AM

Could be wastegate rattle.

Only way to really know is have someone else start your car while you are trying to pinpoint the rattle with the hood up.

Or if it happens every time take it to the dealer.

Floxy · 09-20-2022, 07:21 PM

I’ve noticed the same. Doesn’t happen every time or I don’t hear it. Just had my first oil change and, of course, I forgot to mention.

09-08-2022, 09:15 AM	#1
MattM240eye Private 48 Rep 59 Posts Drives: BMW M240i Join Date: Dec 2021 Location: MA iTrader: (0)	Rattle sound on cold start Hadn't really noticed it before, but on a cold start, for about 5 seconds, there is a rattle from the engine bay somewhere. Anyone else notice it at all? Could be " BMW Normal ". But figured I'd ask
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09-08-2022, 09:38 AM	#2
Rdurty2 Captain 698 Rep 615 Posts Drives: 2022 M240i Join Date: Feb 2019 Location: NY iTrader: (0)	Could be wastegate rattle. Only way to really know is have someone else start your car while you are trying to pinpoint the rattle with the hood up. Or if it happens every time take it to the dealer.
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09-20-2022, 07:21 PM	#3
Floxy New Member 56 Rep 27 Posts Drives: 2012 535xi Join Date: Apr 2015 Location: US iTrader: (0)	I’ve noticed the same. Doesn’t happen every time or I don’t hear it. Just had my first oil change and, of course, I forgot to mention.
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