Hey i just finished swapping my 1jz into my 5 speed sc300. On start up I get this strange inconsistent rattle noise coming from the engine bay. I really don't know what it is or how to fix it. The 1jz is non vvti and starts super easy. I don't think that it is a knock because it isn't consistent like a knock would be.

 

 

Im thinking it's a bad rod bearing. Has anyone else had this issue? Can i replace them with out pulling the motor?