I want to show you something that I experienced recently it is really important for those of you who has BMW N57 or BMW N47 engines! In this particular vehicle BMW F10 5 series ( 530d) - the car came with knocking noise when on IDLE but when you rev it, the noise reduces. At the end I found that the noise is coming from the Vibration Damper! Here I will show you 2 options to test from where the noise is coming :
✅1. Remove belt and start the engine
✅2. Remove the vibration damper and start the engine.
In my case I had installed brand new vibration damper from Continental- turns out that this one is heavier than the original. In this case the only solution is to install OEM Vibration damper!
Everything you can see in below video 👇.
https://youtu.be/4kMd_W2N_wo