EDITED:

So I read about TCTs going bad on s2ks and I read that you mostly hear noise when car is warm. Well this is the noise I hear and its mostly heard when the car is just warmed up, after a bit of driving the noise quiets down a bit. As you can see on the vids, the noise is there at around 1k RMPs and when you rev the engine it kinda goes away. From inside its basically like ticking clock.

[media]http://www.youtube.com/watch?v=OYcsUl4JcoY[/media]

* Beeing processed by YouTube for a long time now....
[media]http://www.youtube.com/watch?v=QWyuxdNxt_o[/media]

 

Sounds like something else.

 

It could be valve clearance, see

https://www.s2ki.com/s2000/topic/100...r-belt-rattle/

 

I agree it could be something else, but since you recorded the video from the inside of your car I really can't make out the sound unless my laptop speakers are really crappy.
here's a better video of a bad tct.
[media]https://www.youtube.com/watch?v=EVS-JLfmTnc[/media]

 

Always forget to make a better vid. Should be taking off to work in an hour or so and hopefully I will not forget. PS. Car is 06 with 50k and I had valves adjusted at dealership at around 30-35k. Maybe they done a crappy job.....

 

updated OP with 2 new vids from inside and from outside. noise does not come on right away after start the car cold, maybe about 5-10 minutes after. on inside video you can also see that noise is going away when i rev the car.

ps. i dont know what the hell is that noise on the video with hood open, thats not what my ears hear, and engine does not sound like that.

 

anyone else can comment on new vids. especially the one from inside

 

Really hard to hear still...I can't make out a specific ticking noise but it does sound like the valves are noisy...was the valve adjustment done at a Honda dealership?

 

yes at dealer about 15-20k miles ago. gonna be driving to New Hampshire soon. maybe will stop by this famous S2000 mechanic. still about an hour drive from there

 

Definitely not TCT.

Run it for 30 seconds without the belt on, see if that noise goes away.

It almost sound like a dry camwheel which will be catastrophic if it lets go.