... shell ,intake and exhaust valve, piston ring, sel ring ,O-ring, and some kinds of oil separator and turbocharger and so on. ... suction valve spindle guide, exhaust valve spindle, exhaust valve seat, exhaust valve spindle guide, exhaust valve casing, exhaust valve roller guide, fuel ... connecting rod bearing, thrust bearing, crosshead, crosshead bearing, and all O rings, gaskets, sealing rings ,etc. B&W ...