If the cylinder heads are on the engine, you will need to add air pressure to the cylinder to hold the valves in place. Our example is the Craftsman 47089 compression test kit using the 14mm long ...

The valvespring appears to be no more complicated than the spring that swings your screen door shut behind you. Granted, the concept is pretty simple, but in the context of the engine's valvetrain, ...

Many gearheads buy their cylinder heads fully assembled and don’t have to sweat making sure all of the various parts are set up correctly. But for those that build their own, or that just need to swap ...