What are the effects after a major car repair?

[LeHazel]

For older vehicles that have run over 150,000 kilometers, major repairs are a possibility. A major car repair mainly refers to an engine overhaul, which involves extensive disassembly of the engine for maintenance. The engine determines a significant portion of the car's performance, and its precision requirements are quite stringent. If the repair process disrupts the engine's precision alignment, a series of issues can naturally arise. Here is additional information: Severe oil burning due to wear and tear will definitely affect normal driving and lead to a vicious cycle of worsening engine carbon buildup. Oil burning is primarily caused by aging valve stem seals and engine wear, such as piston ring wear, cylinder liner wear, and piston wear, which result in poor sealing. In such cases, a major repair is necessary.