1
What is?
Strictly speaking, one of the project engine overhaul.
2
Why should we be boring
After a long-running engine, cylinder wear serious, not avoid causing leak, this time will be burning oil, power down, increased fuel consumption and so on, then you need cylinder boring. Cylinder boring of the cylinder inner wall is processed, it becomes smooth again, so that the piston can be closely matched. Since the cylinder wall surface is polished off a thin layer, thus inevitably resulting in slightly larger bore, the piston rings must replace the corresponding parts.
