What does it sound like and at what RPM?
It's my basic understanding that most, if not all, coyotes tick-tick-tick at lower RPMs after warming up. "Valve Noise" is what the stealerships say.
I find it to be annoying at least, alarming at worst. Doesn't seem to be related to any specific problem. There's a whole thread about it with at least one block replacement on the forum. If you're worried about it, do a little digging.