Repair of petrol engines as well as the repair of diesel engines begins with the detailed diagnostics. The repair of the engine includes dismantling, cleaning with special cleaning agents and the aging and the degree of ware or assessed. Probably it may involve replacement of entire piston, performed at the same boring cylinders giving them a proper cylindrical shape. After assembly the engine is tested before being remounted to the car. The customer is consulted at all stages and the vehicle is returned to him to his utmost satisfaction.