What is boring cylinder grinding crankshaft?

Due to the high temperature of the engine, the crankshaft, piston, piston ring and cylinder liner in the engine are damaged due to adhesion.

The boring cylinder grinds the inner wall of the cylinder liner with 1-2 line without replacing the cylinder liner. At the same time, after adjusting the piston, grind the cylinder liner for the second time.

Grinding the crankshaft: the crankshaft itself is damaged due to the ablation of the crankshaft tile, so it should be polished with emery cloth.

The premise of boring cylinder or grinding crankshaft is that there is no crack in the cylinder itself, the parts are slightly damaged and unnecessary waste is not needed to be replaced. At present, many 4S stores mainly replace accessories and rarely maintain them.