Well I would like to think if the tech at the dealer really though it was the valves they would say so.. but unfortunately thats not always the case. If it was a 4cyl I would tell you just to check them yourself.. but on the v6 you will have to remove the intake and its not as easy as on a 4cyl. but still doable.
I know up to 07 the valves in the v6 were adjustable (screw and jam nut).. can someone confirm this for an 08 as well?
To put your mind at ease a little.. Honda valve trains are notoriously loud.. specially the 4cyl... its not loose valves that cause problems.. its tight ones.. which would make no noise. A tappy engine is a happy engine
