I have 86 with over 200k mi , it made a lot of noise when I got it ,sounded like a diesel.I put in a timing chain kit from EB and adjusted the valves.That cleared 90% of my noise ,you might as well do the oil pump and water pump too while you got em off IMHO

oh what a feeling:
#1 86 xtra cab 22R,EB 261 cam ,Hooker header,2" ex with cherry bomb, Aussie powered
#2 86 sr5 4x4 efi parts truck
#3 87 2wd parts truck
84 supra yard art