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BMW E70 3.0d whistle when cold

Posted: Mon Jan 29, 2018 7:14 pm
by Stuboy
Hi all.

I have today noticed a whistle when cold.
Car is a 2009 E79 3.0d with 80k.

It disappears about 10 seconds into driving or after the engine has been left 5 minutes to warm up.

I’ve removed the air box just to gain access but you can hear the whistle.

It doesnt make this sound at all when driving when warm.

https://youtu.be/TqZBFyMQeE8

Anybody had this before.