how engine will design and fabricate?

Question

engines shape and manufacturing locations

Answer 1

Mold Casting, and now-a-days a process called 'lost foam' casting wherein they make the shape of the engine Block out of Styrofoam then use/put that in a casting mold, pour in the metal and the Foam 'burns out' (Melts) to leave the metal in the foams' shape.

Locations? do a web search