loud engine noise

Hello all this is my first post to this forum and would just like to thank everyone in advance for any help

So i fired up my 450 rhino this morning and it started making this loud metallic noise that got louder the more i revved it up

i checked the clutch and the sheaves and even ran it without the clutch/primary sheave in it

and the noise is still there i am leaning towards a crank i think

has anyone had this problem before?