What Causes Engine Cylinder Scoring?

[JonathanLynn]

Engine cylinder scoring is caused by piston issues, engine problems, or excessive impurities in the engine oil. Details are as follows: Excessive impurities in engine oil: If the filtration system in the oil delivery system fails, such as a malfunctioning oil filter or suction filter, it can allow contaminated oil to reach the cylinder, leading to scoring. Engine problems: Engine overheating due to leaks or insufficient coolant that isn't replenished in time; excessively low engine oil levels, resulting in loss of cylinder sealing and lubrication. Piston issues: Piston ring breakage, which scratches the cylinder wall; piston pin retainer detachment, causing cylinder wall scratches; piston rings stuck in their grooves due to carbon buildup, losing their sealing function; piston pin protrusion, which scratches the cylinder wall.

[TylerFitz]

A few days ago, my neighbor's young man's car suffered from cylinder scoring. The mechanic said it was mainly due to not changing the engine oil on time, causing sludge to block the oil passages, leading to dry friction of the piston rings due to lack of lubrication. As experienced drivers, we all know that the biggest fear for a car is engine oil problems: insufficient oil level, using inferior oil, or a clogged oil filter can all cause the cylinder walls and pistons to lose lubrication protection. High temperatures are also an accomplice—if the cooling system fails, metal expansion can cause the engine to seize directly. Another issue is dust entering the combustion chamber and acting as an abrasive, which is often caused by a damaged air filter not being replaced in time. Saving small money on regular maintenance can lead to spending big money on major engine repairs later!