i have noticed that when i drive my car hard , anything past 5800 rpms i here a noise i think is coming from the valve train maybe valve float. it only happens when the motor reaches 5800. it sounds like a clattering noise. i have only had this car for 2 months. it has a e cam.i was told it has all good valve train in it including 1.7rr.i have not pulled the valve covers yet.motor is fresh to but could use more power. any thoughts on this.