3D model: Inline-four engine

Thing practiced: 3D modeling

Tool used: SolidWorks 2013 trial

I’ve always had an iffy understanding of how car engines work – I learned pretty much everything I know (about everything) from this book when I was small. To understand better, I started modeling one in Solidworks:

Intake and exhaust camshafts:

Pistons and connecting rods:
Pistons and rods