[pto84]

maybe someone has an idea, why my engine sounds so raugh at between 2k and 3k rpm.
here is a sound record:
https://voca.ro/11J4aFEwcPSA

it sounds same as on the video here at 1:28
https://youtu.be/NgI0vGoMLk0?t=88

i have this issue since around 12k miles. (1 year)
Been to the BMW Dealership, they dont know what it is, they just said, when it gets louder come back to us ...

i would appreciate any help ...

[SuperLomi]

I’m a little paranoid about these things after my own experience, but it sort of sounds like rod knock. Hard to say for sure, obviously. Mine came on audibly around that RPM range. Although if a dealer tech didn’t suggest that, I may be wrong.

To be on the safe side I would do an oil change. Inspect the filter for copper bits, and send an oil sample to Blackstone for analysis.

[pto84]

they already checked the oil, nothing was found.

//Edit
Now, if that would be a Rod Knock. How come the engine is not dead yet? The car gets 7.5k rpm from me, even tuned with stage 1.
Is driving 13k miles with a rod knock even possible ?

[SuperLomi]

Originally Posted by pto84

they already checked the oil, nothing was found.

//Edit
Now, if that would be a Rod Knock. How come the engine is not dead yet? The car gets 7.5k rpm from me, even tuned with stage 1.
Is driving 13k miles with a rod knock even possible ?

I drove mine for months after I first heard something, and before I realized what it was. Thought it was something rattling at first. I thought rod knock would be more consistent.

[pto84]

Originally Posted by SuperLomi

I drove mine for months after I first heard something, and before I realized what it was. Thought it was something rattling at first. I thought rod knock would be more consistent.

i´ve found out where it comes from, it´s from in the area where the gearbox / torque convertert is.

Car still running, wonder what to do now.