My car has being making a lot of noise for the past 6 months or so , sounded like the valves were knocking , well yesterday while the car was making the knocking noise, I put pressure on that little shock that is attachec to the head and that dahhh the noise is going

DO u guys know the proper way to fix this , i was going to take it out and put a rubber bushing there but i am afraid i may mess up something like loossen the belt or something since it seems like it is attached to the belt tensioner so let me know guys thanks