Hello!

I recently noticed a new sound on my S2000 on my way to work. This sound could be normal since my new way to work includes concrete barriers that amplify this sound, but I can almost swear it wasn't there even on my new route.

The sound is most prevalent at 2600 RPM with some sort of concrete nearby. At idle, it is barely noticeable unless I've been running it hard for awhile.

I don't believe it's the TCT; I purchased a Billmam unit not long ago.

I've included videos in, above, and at the bottom of the car. The sound level difference is similar to what I hear in person.

The oil level is halfway between H and L; it's been 2000 miles since my last change with no track days. I change every 5000 miles.

Any educated inputs are appreciated! A video of your S2000 at 2600 RPM would be outstanding!!! Here are links to mine:

https://youtu.be/YqypGvLcXNs

https://youtu.be/sReW_rekT9c

(This video includes a lot of injector noise since I was listening to them as well): https://youtu.be/j4YNeyJl4kc

https://youtu.be/lHGhiEko3Yk

 

Its difficult to tell from a video. But what I hear sounds like tapping valves. When was your last valve adjustment?

Valves make noise when they are loose. But when they wear they get tight. So usually when they need adjustment they are rather quiet. If anything they get noisier after being properly adjusted. But its still worth checking if its been a while.