I went to get lunch and when I got back to school I have this ticking noise.. It's coming from the valve cover and i can only hear it after shut off.. It only ticks for about a min .. I'm running 5-30 rotella with a wix .. could this be a problem?

 

I wouldn't worry about it. Most likely just the sound metal makes when it cools down.

 

It almost sounds like a ratchet though ...

 

exhaust leak probly near #6 cylinder. rear bolt tends to break.