Honda: Honda Fit valve adjustment parts, valve adjustment, Honda

Question
Hi, I have a 2008 Honda Fit. I have 30,000 on it. The valves are starting to click and I am going to adjust them. Are the o-rings and gaskets for the valve cover, (head cover, that is), intake ports generally reusable? What about the ERG plate, should it be replaced or can they reused if they still look OK?
BTW, at what mileage should the valves be adjusted? The service book says, "When they are noisy".
Thanks for your help
Danny

Answer
There is not a mileage interval for valve adjustment on your car. The valve cover gasket can be reused but you'll need to apply some Hondabond to the corners before you reinstall it. On another note, I doubt you need a valve adjustment and there is an excellent way of determining if one is recommended. The engine manifold pressure reading is monitored by the cars MAP sensor. With an OBDII scanner monitor the MAP sensor reading in volts. A voltage reading of .88v to .92v at engine idle is an indication that the valves are adjusted properly. Readings above 1.0v would be the threshold that I'd recommend adjusting the valves. Remember to adjust the valves one cylinder at a time after letting the car sit overnight to cool.