Hello I need some info. I hear a ticking sound thats not a normal sound coming from my engine after it heats up. My friend says it is coming from the valve cover. When you put your hand on the cover you can feel the ticking it only happens when the truck is in drive or reverse and you can hear it in the cab. Dose anyone know if the valve have to be adjusted on this engine. The ticking just started a few days ago. The truck only has 38500 miles on it,I did and oil change about 3 weeks ago and checked the oil level today and it was good. Thanks Mike