That's the main problem - after 30 sec of idle running, sound just fading off and do not show up again, that's why i'm confused. It do not getting any louder when i rev. And about induction kit, I just changed recently air filter from some fat foam, which was literally in pieces to proper HKS air filter replacement. I will take a look onto crank pulley anyway.
Edit:
Just went down to car, switched it on, noise is not present at the moment - engine was off for around 2 hours, it just happens when engine is off for at least 8 hours+. Crank pulley seems to be stable, not wobbling, moving, screetching, I rev car a little, only noise i got was from my nice big exhaust