[Snypa]

Originally Posted by ihernandez7910

The only way to be 100% Sure is to physically inspect the turbo or test the entire boost system. My 2 cents were based off the information given. IMO- trying to get a diagnostics on a forum is recipient for failure especially regarding something as delicate as turbos.

Fair enough.

Originally Posted by JustDriveIt

If it's only when cold, it is fine. Mine does it, was inspected by BMW, was found to be normal and fine. Goes away with warm oil temps. Has 0 impact on my performance and logs. That was 25,000 miles ago, still chugging fine. I would NOT worry about it and change turbos when it is probably normal and you can get many many thousand more miles out of your expensive to replace turbo.

What's weird is that mine never use to do it then out of nowhere it started. If these cars didn't come with the noise brand new, how can it be normal? Mine is more pronounced when cold as well. For now i'll just enjoy it as it is and see how it all unfolds.

Thanks

[Shane303]

Wait until the bearings and or seals finally have enough and you get the "drill" sound. That one gets the blood pressure up... Top mount single decision was made for me!

[james4321]

Are U talking about noise like this?
~6second, 2nd gear, started at 2000rpm: