What to do when coolant is in oil engine. Should I replace the engine if an internal coolant leak exist and there is evidence coolant in the oil on a daewoo leganza?

What to do when coolant is in oil engine. Should I replace the engine if an internal coolant leak exist and there is evidence coolant in the oil on a daewoo leganza??
Coolant in the oil is usually a failed head gasket. This can be repaired far easier than replacing the entire motor. Find a qualified shop and have them diagnose this for you. Ask about a written warranty.