Line Boring: Berco BC-4
Line boring is the machining process that corrects the main line of the block. We at J and M utilize this process because it is much more accurate rather than line honing an engine mainline and saves the block and actually cost less since there is no need for shorter timing chains.
Line Boring Babbitt Bearings
After block or inserts have been poured the block is indicated and trued to the camshaft and centerline of block the block is line bored to accept the reground crankshaft and also machine the thrust of the bearing surfaces