What to Do When a Car Engine Cylinder is Scored?

[StColin]

When a car engine cylinder is scored, all piston rings need to be replaced. A car with scored cylinders requires a major engine overhaul, commonly referred to as cylinder boring. This occurs when the mutual movement between the piston and cylinder causes severe surface damage, primarily due to localized failure of the lubricating oil at the moving parts. In such cases, scratches, cylinder scoring, or piston seizure often occur. The main cause of cylinder scoring is severe wear or breakage of the piston rings on the cylinder piston and the cylinder wall. This leads to a situation where the originally tight cylinder allows engine oil from the engine compartment to enter the combustion chamber. After combustion, the incompletely burned exhaust gases are expelled through the exhaust system.