Overhead-valve internal-combustion engines, in which the valves are located in the cylinder head and actuated by a block-mounted camshaft via pushrods, go way back in automotive history.

Many gasped when Ford switched its V8 engines in the F-150 to an overhead valve cam (duh!) design ... new engine will likely have four valves per cylinder because of its OHC design, expect ...

Many gasped when Ford switched its V8 engines in the F-150 to an overhead valve cam (duh!) design ... new engine will likely have four valves per cylinder because of its OHC design, expect ...