Modern engine bays are filled with black plastic where bright cast aluminum once sat, and few parts symbolize that shift more clearly than valve covers. Automakers have largely traded metal for molded ...

Located directly above the cylinder head, a valve cover is a critical component that prevents oil from escaping through the top of an engine. Oil keeps temperatures down and reduces friction between ...

Safety, performance, aesthetics, noise, comfort, reliability, and durability are the goals that keep automotive engineers up at night, and the miracle solution has, so far, been "more plastic." ...