My brother bought the tool to adjust his valves on his civic, and considering that my engine has 133,*** miles on it, it would be good to check my valves and see if they need to be adjusted. The measurement of the valves is written on a sticker underneath my hood. Before i do adjust them, is there anything i should do? check? or change while in there? Or is there anything that needs to be adjusted other than the valves? thanks