So, over the weekend I continued troubleshooting the buzzing noise as previously described. Definitely comes from the brake master cylinder, while moving (I.e.: No sound at idle). I even shut off the engine while coasting down the street to totally isolate the sound.
As far as what is causing the buzzing, still uncertain. But...I decided to remove the recently installed new (EBC brand) brake pads, and re-install the OEM originals just to experiment. The former still had decent life left but theyíve seen 20,000 miles already. What I determined is the sound was definitely less apparent, but still there. I put the aftermarket pads back in and the noise was back again at full strength.
The design of the Honda OEM pads vs. the aftermarket EBC brand may be a factor. I know some donít care for anything other than the OEM pads. I actually didnít know what my dealer was selling me until I picked them up. The OEMs have wear strips built in whereas the others donít. This technically provides 4 smaller contact surfaces per pad instead of two on the EBC version. ( see pics) Could this affect the chattering.
Or, is the brake disc ever so slightly warped that a chatter is being generated all the way up to the master cylinder? If so, what inside - is chattering? I held a straightedge over the disc but couldnít detect anything off. Not scientific of course but best I could do. Note: My master cylinder was replaced several years ago when the mirror mount broke off the aluminum casting.
I plan on ordering a set of OEM pads and putting them on. Iíll just toss the EBCs.
Would anyone do something else? Any other ideas? Other than this noise thatís really getting the best of me, they function fine.
Iíve had warped rotors on a car before and a slight steering wheel vibration was a mere nuisance. Would you consider this a safety issue based on this, or an annoyance?