What to Do When an Engine Cylinder Gets Scored?
2 Answers
When an engine cylinder gets scored, it is necessary to replace both the cylinder block and pistons. Below is more detailed information about engine cylinder scoring: 1. Definition: Engine cylinder scoring refers to the appearance of noticeable longitudinal mechanical scratches and abrasions on the inner wall of the cylinder within the movement range of the piston rings. In severe cases, adhesive wear occurs, leading to difficulties in starting the engine or causing it to stall. 2. Symptoms: Reduced cylinder compression pressure, resulting in loss of power; Downward leakage of the combustible mixture increases crankcase pressure, which in severe cases can cause crankcase explosion; Upward leakage of lubricating oil into the cylinder leads to oil burning; Excessive smoke from the exhaust pipe; Abnormal engine noise; The engine fails to operate normally or even stalls.
Engine cylinder scoring is quite a nuisance. I experienced it once, and it literally gave me a cold sweat. Cylinder scoring is usually caused by insufficient lubrication or engine overheating, such as when the oil level is too low, the oil filter is clogged, or the cooling system fails, leading to a temperature spike. That time, my car suddenly made strange noises while driving at high speed. After diagnosis, it turned out to be worn piston rings and cylinder wall damage—all because I ignored the scheduled oil change, thinking delaying a few days wouldn’t matter. I immediately pulled over, called a tow truck to take it to the repair shop, and ended up replacing the piston assembly and oil system. It cost a lot, but it prevented bigger losses. My advice: always stick to the oil maintenance schedule, and ideally check the oil level with the dipstick every month. If the engine temperature gauge spikes or you hear unusual noises, those are warning signs—shut off the engine and inspect immediately. Prevention is better than cure. Using high-quality oil and avoiding high-speed idling can significantly reduce this risk.
