Probably gonna adjust the valves on my 1100 tomorrow morning. I know that she will have sat long enough to be fully cool when I do it but I am curious if others have pushed the leave it overnight without running rule before adjusting valves. I have to think that 4-6 hours would actually be enough but because I don't want to do the job more often than necessary I have never actually tested that theory. What say you? What is the shortest time period you have waited? Did you ever have to go back in and redo it because you did not wait long enough?