Yes, there IS some labor involved in changing an engine.
You can't replace it yourself you will need an engine crane (mini crane that lifts the engine up) only mechanics have that and they will charge a small fortune
You FAILED to even ask a question there, pal. If you are feebly attempting to ask the COST of such a procedure, it will FAR exceed the car's value.
**** why would u get a new engine just buy a new car
2004 Kia Optima DOHC