What should I do if the cylinder is scored?
2 Answers
Cylinder scoring solution: If cylinder scoring is found, the cylinder head should be removed to inspect the scoring condition on the cylinder wall and identify the cause of the scoring. If most of the engine cylinders show minimal wear and only one cylinder is severely scored, the severely scored cylinder can be treated with a cylinder sleeve. Then, this cylinder can be bored to the same repair size as the other cylinders and reassembled. Engine cylinder scoring 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. Cylinder scoring is a phenomenon where grooves appear on the inner wall of the cylinder due to improper vehicle use or repair.
If the car engine experiences cylinder scoring, I must immediately stop the car and turn off the engine, not driving for another minute, because cylinder scoring means there are scratches or wear on the cylinder walls, and continuing to drive will completely ruin the engine. First, check the oil dipstick to see if the oil level is sufficient—insufficient lubrication is a common cause. If the oil is low, add the appropriate engine oil, but do not start the car to avoid worsening the damage. I experienced this once, thinking it was a minor issue, but when I finally took it to the repair shop and they opened up the engine, the cylinder liners were all scratched, forcing me to either re-bore the cylinders or replace the parts, costing me several thousand yuan—it was heartbreaking. Prevention is key: regularly follow oil change intervals, avoid using low-quality oil, and don’t overload the engine in hot weather. Keeping the engine cooling system in good condition can prevent similar issues. The most important thing is to address the problem as soon as it’s detected—safety first, never be careless on the road.
