I recently installed a EZ belt drive shaft. I noticed some metal shavings in the area. I have checked the front pulley and the key. It all looked okay. clearance is fine on shaft nothing visible. Any ideas? Could this be coming from the engine itself and going into the drive shaft? EZ seems to work fine. I also noticed some black soot from the belt, and I haven't driven but about 2 miles. I'm new to this so any suggestions would be helpful.