Thank you for feedback. That explain your knocking noise in old engine all the time. Did you check presure on cylinders before that you replace engine? in my engine presure as brand new engibe and also i hear diffrent type of knocking than you mentioned before. So my cases is little be diffrent but boucing revs around 2000 rpm and timming advance is the same.
You bought engine with the same code, year etc. Or you chose maybe newest or older version of your engine?