I didn't think this could matter, but my ears/instinct tell me to be wary. So when I had engaged the timing belt tensioner, the crankshaft mark moved clockwise about 3/4 of a tooth. I didn't think this was necessarily a fatal thing as I could rotate the engine with the plugs still in and with only a slight expected resistance. I even ran the motor for 5 sec or so with only the crankshaft pulley in place b4 re-installing my covers and didn't notice any excessive issues. When I re-assembled everything and ran it, I got no misfire codes, but I can hear an ever so slight, "sing,sing,sing" . sound similar to a maybe a sewing machine in the next room sound that wasn't there before. I've put about 10 HRs of drive time on the car since doing the job, and still no codes of misfire or crankshaft codes. I found some online techs state how to prevent the crankshaft from moving off a tooth by routing the belt counter-clockwise to ensuring all the slack in on the rear cam side b4 popping the tensioner. My question is: is the noise valve lash? and am I risking burning a valve if I keep driving vs. going back in and re-adjusting the timing by this small degree?