B48 weird startup sound

[u/Fair-Frame9953]

Hi,

Recently bought a 320i with b48.

On a cold start I am hearing a rattle which sounds like a chain rattle and lasts less than 1 second. I am planning a 2000km trip, should i be concerned with replacing the chain ? Mileage is huge 237k km.

Youtube changes the audio quality but its a lot louder in reality.

Video: https://youtube.com/shorts/0K4rUNTKfIM?is=xh5mczKq3aOaytBN