[Rob Daman]

Hi all,

I took my e90 n54 to a popular shop and was told that it's due to those pulleys.

I've never heard of anything like that but I know some cars can be quirky.

They ran a smoke test to check for vacuum leaks and said none were found. I hinted towards checking the turbo inlet pipe and was told it's ok too. I checked the charge pipe and fmic hoses myself.

here's a video of the noise i'm talking about.

It used to be a quiet whine then I decided to romp on it then it got way louder and did the half power if I ever romp again.

any help is appreciated.

[Chris@VargasTurboTech]

I'd do a boost leak check immediately.

[Rob Daman]

that's with around psi pressure right? i told them but i guess they think they're right.

Originally Posted by Chris@VargasTurboTech

I'd do a boost leak check immediately.

[Chris@VargasTurboTech]

Originally Posted by Rob Daman

that's with around psi pressure right? i told them but i guess they think they're right.

Yep, generally you'll do that with at least what your peak boost target is.

Chris

[Spacecpe]

Sounds like a shot turbo to me .. Very much turbo whine.

[Rob Daman]

thanks guys. i didnt think it had anything to do with pulleys. i'm going to go to another shop.