Valve clapping…… from where???

Hello, everybody! I’ve been having a problem with my Audi 80 B3 for quite some time now, and that’s how stupid my valves are! Meanwhile, he sounds like capped diesel. I then visited some screwdrivers and told them about my problem! but to my astonishment, versciedene answered to days! how to have valves adjusted (in case of hydrostous??) noticeably ; oil pump defective ; or but also hydrostous have become sluggish! Now I don’t know any more! I hope, that someone knows about the problem and can give me important tips. MfG Aki