Does Minor Cylinder Scoring Require an Overhaul?

[DeEthan]

Minor cylinder scoring does require an overhaul. The main cause of cylinder scoring in automobiles is insufficient engine oil, which leads to excessively high temperatures during continuous engine operation. This can cause certain damage to bearings and pistons, and the extreme heat may also result in cylinder block cracking, severely affecting vehicle performance. Automobile cylinder scoring refers to the 'welding' abrasion between the piston, piston rings, and cylinder liner surfaces due to high temperatures. Specifically, it occurs when the oil film between the piston and cylinder liner breaks down, causing dry friction. The intense frictional heat leads to microscopic metal melting and adhesion, tearing nearby metal particles. According to gas sealing requirements, the clearance between piston rings and cylinder liners should be as small as possible, creating extremely unfavorable lubrication conditions.