As part of the operational restoration of the Tod Engine we determined thatr the piston valves were excessively worn and needed reboring.  We retained the services of Dimitru Iures at IMS Machine Shop in Boardman to rebore both steam and exhaust valve cages using a Climax portable boring machine.   All four cages cleaned up well, the ring grooves on the valves were squared up and new rings were made to the new sizes.