Tooked the valve cover off today, and founded out that 2 cam followers had slipped away from the cam / valve and were klocking around. So, atleast 2 busted followers, totaled cam shaft and possibly few bended valves... Il guess ill just try to find whole cylinder head as used part.
"Funny story" the guy from who i bough my injectors, had exacly same on his parrents HDi... Were knocking (tho, that one knocked all the time), and when he took the valve cover off, 2 followers had slipped away, and few bended valves.
He took the head to machinery for valve change, and when he got it back, he noticed that _all_ of the followers had loose bearings... New ones are 40€ each, so he just bought whole engine from parted car...