Hi, I started noticing a clicking noise in my engine a few weeks ago. 2010 Toyota Corolla, ~36000 miles. Found a video on youtube that sounds just like it. https://www.youtube.com/watch?v=mtXZBRDYmPg At first I thought it was just noise from it being cold here (20 deg F), but after driving for ~15 min it still makes the noise. Had an oil change 2 weeks ago...can't remember if it coincided with the noise but I'll probably have a local mechanic take a look. Doesn't appear to change with acceleration or turning. Any thoughts? What things should I be wary of? Thanks in advance.