So whats wrong with my engine.
 

http://www.youtube.com/watch?v=bCw6JFFGRiw
http://www.youtube.com/watch?v=D6DDLJRnO40

started doing it over 12k miles ago. Its progressively getting worse.

it sound rough were u reving it or is that wut the problem wuz. it sounded like u should gap ur valves tho the cacking itll givv u sum lost hp too. .010 gap get a feeler guage nd the little valve cover gaskette pack at autozone

Thats how it sounds like when Idle and when reving. The sound stops once I go pass 2000 rpm.

try gaping the valves sum r probly loose as hell nd not even doing anything