What Causes Cylinder Scoring While Driving?

[MilaLee]

Here is a detailed explanation about cylinder scoring: 1. Definition: Cylinder scoring is a technical term used by maintenance personnel. It refers to deep grooves being formed on the inner wall of the cylinder, causing the piston, piston rings, and cylinder wall to lose their sealing ability during friction. This results in reduced cylinder compression pressure and loss of power. This phenomenon is also one of the common engine failures. 2. Causes: Engine cylinder scoring is a relatively serious issue, and there are many reasons that can lead to this phenomenon. It is generally related to the piston assembly, cylinder liner, and daily driving habits. In older vehicles, the piston ring gap will inevitably change. If the gap is too large or too small, or if the rings expand and deform, they can damage the cylinder wall. Excessive carbon buildup on the piston rings can also cause this issue.