Cylinder barrel inside surface treatment apparatus and method

A cylinder barrel inside surface treatment apparatus for causing a treatment solution to come into contact with an inside surface of a cylinder barrel provided to a cylinder block of an internal combustion engine and treating the cylinder barrel inside surface, the apparatus comprising:

• a pallet for supporting the cylinder block with a gasket surface of the cylinder block faced upward, and closing off a bottom opening of the cylinder barrel;
• a first drainage passage provided to the pallet for discharging a portion of the treatment solution accumulated in the cylinder barrel;
• a cover member placed on the gasket surface for covering a top opening of the cylinder barrel and having at a bottom thereof a concave portion communicating with the top opening of the cylinder barrel;
• a nozzle inserted from above downward into and attached to the cover member and having treatment solution spray holes for spraying the treatment solution toward a wall of the concave portion so as to feed the treatment solution to the inside surface of the cylinder barrel along the concave portion wall;
• and
• a second drainage passage provided in the cover member for discharging the remaining treatment solution accumulated in the cylinder barrel.