I NEED HELP. So when the car is running and is idle, there's a knocking noise, but i know its not really a knocking noise on the engine, the noise disappears when I press my clutch in so its something with the clutch and transmission. Has anyone else had this issue? Please if someone has any knowledge of this, it would be appreciated. There is a noise when idling and the "knocking" noise disappears when I press down the clutch. Thank you

 

Make a video of the sound and post it to youtube, then put the link here.

It's likely a worn out OEM flywheel / pressure plate / throwout bearing though.