A few days ago I noticed 2 new noises. The one is a ticking sound that sounds like its coming from the valvetrain (more noticable when car is in gear/under load, and at times it also squeeks like a bad belt). The other is a noise that sounds like you're running a pencil or something against a ribbed rubber surface, and it occurs when I apply/release pressure on the clutch. If I pull the valve covers, what should I look for?