heya guys

i just bought a DC2 but unfortunately the engine is not perfect
the engine is making loud az knocking sound when its running, the sound just gets louder as the rev increases
the first time i thought it was probably just valve clearance problem, but after i got it inspected , it turned out that the big end bearing is fucked :/
will that be a problem, because i was thinking to fully rebuilt the engine back to standard anyway ?

thanks