Stop in for a cup of coffee

Belt. If it slips a tooth,it tears the teeth off.
Without a scan tool, its not easy to figure out an issue like this.
Timing good? Chain good? loose? Or is it a belt, not slipped a tooth??
Actually I can see part of it thanks to someone busting a chunk out of the cover. The little bit I can see looked good. I will try to Move it and get a better look tomorrow