Indeed, it is very difficult to repair the motor. In comparison to other parts of the car, this is really a challenge which requires good experience and a qualified specialist. It is almost impossible to carry out such repairs independently at the proper level. My brother also decided to become a good minder and to understand all types of car repair. He even got a specializing education in this sphere in the university and finished a special program to become an auto mechanic https://www.vocationaltraininghq.com/how-to-become/plumber/. But even he does not undertake such work.