I have a ticking/rattling coming from my motor. It isn't so bad when the motor is cold, but when it reaches full operating temp it become quite noticeable between 2500-3500 rpm. It only makes noice when accelerating or maintaining speed. When letting off of the throttle the noise goes away.
Valve clearances have been checked and everything is in spec. Timing chain tensioner has been replaced. Serpentine belt was removed and sound was still there, so that rules out the serpentine belt tensioner or even possibly the water pump. OCV valve was cleaned. Anything else that can be checked?