This specialized equipment is utilized in engine rebuilding and repair to precisely machine the surface where the valve makes contact with the cylinder head. It achieves a superior seal compared to single-angle methods, contributing to improved engine performance. The result is enhanced combustion efficiency and reduced leakage.
Its importance lies in its ability to restore or improve engine compression, leading to better fuel economy and power output. Historically, valve seat grinding was a common practice. However, machining with defined angles offers greater accuracy and repeatability, leading to longer valve and seat life. This approach is particularly beneficial in high-performance engine builds.