This full-size 22RE Toyota Engine is the result of nearly 90 hours of 3D printing. Complete with a rotating crankshaft, pistons, cams, valves, and everything else you’d expect, the end result is incredible

Using an electric motor for assistance, this miniature engine can be fired up, making it an excellent way to learn about internal engine workings. Though we’re not sure if this block would survve the pressure of combustion, the end result is very impressive