How do you tell how many valves are in your 2010 f-150?

multiply the number of cylinders you have by 2. normally only 4 cylinder and some 6 cylinder engines have 4 valves per cylinder. if in doubt remove the valve cover and count the number of rockers or cam lobes if it is an overhead cam engine. easiest way to find out for sure is to look your specific engine up on the web.