Line boring is one of our process where main tunnels in the cylinder block are reworked to achieve true, round and aligned journals .This is achieved by machining main cap parting faces and reassembling, this reduces the main tunnel specifications and allows us to accurately line Bore / Line Hone to the desired specification.

Line Honing is performed on our Sunnen CH-100 machine to recondition the Main and Cam tunnel. The honed finish achieves finer surface finishes with the result of improved bearing contact which is desired in performance applications and Race Engines.