Alright... I've noticed this for the past month, and have had my S2000 for more than 2 years, so its not the common decelleration buzz (already got that fixed)

It sounds what could be a loose nut or bolt, but I now know that its not... the vibration only occurs when the everything is at operating temp and gets much louder from 2800-3000rpm as well as 4900-5200rpm. I'm really struggling to know what this could be, as it might be internal. Just wondering if any of you experienced techies could shine any light on the matter or if anyone else has had this problem...

Any help would be greatly appreciated!

Thanks,
Troy

 

what was the conclusion of the deceleration buzz?

I think I have that sometimes...it seems as if it's gerated from the front left wheel well

 

The conclusion??? Got it fixed, and it didn't have that annoying buzz anymore...

Definately not generated by the wheels in my case... does it when its not in motion as well. Its way more annoying than the decelleration buzz though, as cruising RPM is right where the buzz occurs, echoing off cars and walls (which is what they are hearing as well, and it makes the car sound broken!)

 

Then you have the best possible situation for finding this rattle. Most rattles happen when moving, so it's impossible to get out and check. You have the opportunity to open up the hood and rev the engine to the rpm that reproduces this thing. That is the time to narrow down where it's coming from. Use a mechanic's stethoscope to do the final location. You are in a far better position of find this thing than we are.

 

The sound your explaining sounds very similar to one that I've been hearing from my car. I'm convinced mine is coming from the bolts that connect my cat to the header. I had a test pipe and exhaust on it and recently went back to stock. When I put the cat on I didn't have those bolts with the spring thing on it and through vibrations this regular nut and bolt set up has become loose. Hopefully thats what it is for me. I'll let you know
-Adam

 

does the sound come in front of you(engine bay), underneath the shifter(cat), driver side, passenger side, etc?

try to get a sound clip of it..

 

I just replaced my cam chain tensioner and all the odd valve tapping, screeching sounds when engine is warm went away. If you haven't replaced this 2 bolt job, I highly recommend it.

 

Mine sounds like its coming from underneath the shifter.... The only things I can think of are the cat bolts, driveshaft, or (hopefully not) the tranny. Hopefully I can get in a muffler shop on sat.
-Adam

 

Sorry for dragging up an old post

Driv300mph, did you find out what the problem was? I have pretty much the same symptoms, thought it was the exhaust heat shield but removing it didn't solve the problem.