I had a dead cylinder, it was number two, there was spark and compression, but the valves didnt move, so i put slick 50 in the gas tank, run it at the highway and it cleaned the valve, i think it has to much sticky thing on it, wich is the best chemical cleaner for the valves?
is it prolong so good?

 

To properly clean a valve you need to remove the valve cover/ rocker arms/lifter guides. After that you have access to the valves. I'm betting the valve oil seal is bad or the engien ran with too little oil to long.