So I'm sure anyone that reads this knows that rhythmic ticking at idle is fairly normal and nothing to be worried about. However, I've started to hear a new sound, which at first I thought was exhaust tinks when it was cooking down but it's not. The best way I can describe the sound is if you were to take 2 small rocks and clack them together. It's completely random too, sometimes it'll do it quickly and sometimes I won't hear it for a few seconds then it starts up again. I'm going to listen with my stethoscope tommorow but any extra info would be helpful.