What are the most obvious symptoms of cylinder scoring in a diesel engine?

[LeviRose]

Cylinder scoring is characterized by noticeable jerking of the vehicle, accompanied by significant abnormal noises from the engine, reduced RPM, and a clear drop in power output. Traditionally, when cylinder scoring occurs, the cylinder needs to be bored, meaning the cylinder is enlarged to remove the worn-out areas. After boring, oversized pistons must be used, as standard pistons can no longer be employed. Below is relevant information: 1. Cylinder Scoring: Cylinder scoring refers to severe surface damage caused by the relative motion between the piston and the cylinder. The primary cause is often the localized destruction of the lubricating oil film in the moving parts, leading to scratches, scoring, or seizure. Although the extent of damage may vary, these conditions are collectively referred to as cylinder scoring. 2. Causes: Insufficient clearance between the piston and cylinder; poor lubrication between the piston and cylinder, or the use of inappropriate engine oil; piston ring breakage or seizure on the piston, or failure of the piston pin retaining ring; misalignment of the piston and piston rings, causing excessive pressure on the cylinder wall.