Ok, as of recently, i have been hearing a noise in my engine bay, it does not sound like rod-knock at all but more like something is loose and hitting something. im thinking it might be something related with the tranny because as of lately reverse is kinda hard to go into... my clutch catches real high and i can feel the vibration of the noise in the shifter. someone had said that it might be the valves... but i dont think so because the noise starts about 20 secs after the car starts up.. does anyone have any ideas of what it might be?