Method for operating the engine of fastening tool

A method for operating a driving tool that can be employed for driving fasteners, such as nails. The method can include: providing a housing that defines a housing cavity with a rod aperture; mounting a plurality of seals to a cylinder sleeve; inserting the cylinder sleeve into the housing cavity; inserting a piston assembly to the cylinder sleeve, the piston assembly including a driver that extends into the rod aperture; coupling a cap assembly to the housing to enclose an end of the housing cavity opposite the rod aperture, the cap assembly including an exhaust outlet; biasing the cylinder sleeve toward the cap assembly to inhibit fluid communication between the housing cavity and the exhaust outlet and permit fluid communication between an interior of the cylinder sleeve and the exhaust outlet; and translating the cylinder sleeve away from the cap assembly to permit fluid communication between the housing cavity and the interior of the cylinder sleeve and inhibit fluid communication between the interior of the cylinder sleeve and the exhaust outlet.