When accelerating or at constant load, not at idle, I am hearing a clacking sound just under the valve cover. Any suggestions for what may be the issue?

 

valve lash. It's a honda. Adjust the lobe clearance with feeler gauges.

 

Yeah, it must have been just that, so far anyway. I went ahead and readjusted the with the minimum spec for clearance on the valves. I was able to run it at idle for an hour with no issues. Hopefully the road test will prove to be successful. Thank you for your input.

 

I'm helpful for once lol

 

Oh wait, nvm. Now it is pinging.

 

run it down to a couple gallons and fill it with the highest octane and see if it still does it