The Nissan Leaf is an electric vehicle; it has no pistons, no cylinders, no valves.
It does, however, have a valve cover:
When the television was introduced, and for literally decades afterwards, it was not uncommon for them to be housed in wooden cabinets or, in later, years, to come with faux wood finishes. The thinking was, the TV was something new and alien. So, to integrate it with our lives and, indeed, the fabric of our society, it needed first and foremost to integrate with our living rooms. Ergo, the TV became a piece of wooden furniture.
So the Leaf, inevitably, is a bit closer to Studebaker than to Star Trek. I’m not quite sure how I feel about this. If this is the powerplant of the future, it seems like it ought to look futuristic, but I hate it every time I pop the hood of a car and nothing looks familiar. So maybe this is Nissan’s sop to saps like me.