In an engine, the relationship between the valves and the pistons is a precarious one. If there is too little space, they can collide. If this happens, the resulting carnage require replacing one of ...

Lots of displacement, more compression, and a ton of valve lift used to be the recipe for a typical professional-level drag-race motor. Today, this same description could just as easily be a serious ...

The instance of piston striking valve is right up at the top of the list of things that will ruin your day. It's fundamental tothe four-stroke cycle that valves and pistons come close to one another, ...