All things under the hood of a car have an inherent delicate nature and require special tools and knowledge to fix, but there ...

[Project Farm] has been running all sorts of tests on different materials as field-expedient cylinder heads for small gasoline engines ... shows that 3D-printed parts are surprisingly tough.

It sure is. With a cast epoxy cylinder head, this engine will run for just long enough for a proof of concept. This experiment began by casting a single monolithic block of JB Weld that’s a bit ...