Even though I replaced my valve cover gaskets when I adjusted the valves a few years ago (and have another set on hand) the "Good Book" -- or Honda Shop Manual -- says, "Replace the head cover gasket with a new one if it is damaged or fatigue" on page 8-25. (They made a typo on "fatigued".)
Anyway, my gaskets looked good, but I replaced them anyway. Plus, I applied Three Bond 1521 in the grooves as per the Good Book's recommendation.
