Position sensor for piston ring compressor

This invention relates generally to a position sensor and, more particularly, to a position sensor for positioning and aligning a piston assembly with relation to a cylinder of an internal combustion engine. A piston ring compressor having position sensors for aligning a piston assembly with a cylinder of an engine block. The position sensors enable a piston assembly to be properly aligned with the cylinder prior to inserting the piston assembly into the cylinder without damaging either the piston assembly or the cylinder. The position sensors are linear variable distance transducer which are used to align the centerline of the piston ring compressor with the centerline of the cylinder.