I have a 03 civic ex with 96k how important is it that I do a valve adjustment. The engine runs smooth.
the factory maintenance manual calls for the valves to be checked and adjusted if necessary every 110,000. unless they're noisy (loud tapping) they probably don't require adjustment. The older Civics were very sensitive to the valve adjustment but the 2003 won't give you any problems if the valves aren't noisy. that being said, if you notice a decrease in performance or fuel economy around that mileage it won't hurt to get them checked and adjusted. hope that helps
Honda valves don't NEED adjustment unless you have serious problems.. If you give it the correct gas...keep the oil changed and don't beat on the engine, it won't need LOTS of work...
intake is .007-.009in exhaust .009-.011in good luck
