The Stirling engine works thanks to air (or other gas or fluid) trapped between two metal discs. The heat under the lower plate causes the air inside to rise, lifting an insulation disc inside the ...

The $29.99 all-metal desktop Stirling engine kit is one of the simplest. It can be assembled in 15 minutes and is recommended for ages 14 and up. Read Full Story ...

“A fun DIY project,” said another reviewer. “The Playz V8 Model Engine is a great kit for learning about engines. It’s easy to build, fun to operate, and a perfect gift for anyone ...

The financial calculus of a DIY engine overhaul is complex. While you might save on labor costs, the expenses can quickly spiral. Quality replacement parts aren’t cheap. A complete engine rebuild kit ...