2015 accord hybrid- the manual states to adjust valves if they are noisy- (my 2014 odyssey also).
2 questions-
1- what does a noisy valve sound like?
2- is this a DIY operation by the casual home mechanic? - I ask that question because it seems like it would be an involved process to adjust valves- yet it is in the manual right next to asking us to check the tire pressure and what type of gas to fill.