Well when I was adusting the valves I had trouble with just one valve on the exh. side. This one valve was stuck open. But I ran it for about 20 min. Then after I checked it again it seemed okay but It still has no play when I try to push down on it with my fingers. The work that i had done to it was a 3 angle valve job. Ferrea valves and new valve guides. Did the machine shop do something wrong or is something wrong with the head? I'm pretty much just learning as I go along. Any help would be great