Hi. im new here and need some help. i brought my turbo last year, ive not used it since i collected it. it had a slight tapping noise so i removed the camshaft and lifters they were worn so i brought a camshaft kit and replaced them, valve stem seals, water pump and cambelt and the noise is still there but its more of a slight knocking!! bit worried now mightbe something bad like bottom end or the oil pump!! its there on tick over and when you increase the rpm.. someone said it couldbe the turbo?? can anyone help me please... thanks