A mold system for producing components of a turbine engine. The mold system may enable a configuration of a turbine engine component to be changed in less time than conventional systems. The mold system may include a mold formed from mold plates wherein at least one of the mold plates has at least one mold cavity configured to receive a ceramic insert and a ceramic insert positioned in the at least one mold cavity and including a core making cavity. The ceramic insert may be formed from a material having high compressive strength, good wear resistance, good corrosion resistance, good thermal conductivity, and high toughness, such as but not limited to, graphite partially or fully converted to silicon carbide, silicon carbide, graphite coated with silicon carbide, and other appropriate materials. The ceramic insert may also be formed with other near net shape processes, such as, reaction bonded metal oxides.