Achieving perfect 30, 45, and 60-degree angles doesn’t have to be difficult – it's all about understanding the geometry behind them. In this video, viewers will uncover four simple yet ...

JGM performed all of the required machine work on the head, including machining the valve seats to a 15/30/60-degree, three-angle valve job. A normal 45-degree, three-angle valve job employs 30/45 ...