RSmass

I have a 2008 Honda civic 4 door EX with a 1.8 and a 5 speed manual trans. the engine started to make a weird noise at idle, and at 2500-3000RPM, it still run and drives good, any other RPM the noise is gone does not run rough and oil is brand new, when I changed it it wasn't low either, I do not beat on it, I drive normal on the highway to work with it, no idea what the noise is? No check engine light, or anything, has been like this for about 3,000 miles now, anyone have a idea? here is a video of the noise.


Thanks.