How Long Can an Engine Generally Last After Cylinder Boring?

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Generally, a car engine can run about 3,000 kilometers after cylinder boring, but with proper assembly, it may last hundreds of thousands of kilometers. Here are some extended details: 1. After cylinder boring, the engine requires a break-in period similar to a new car, covering two to three thousand kilometers. The longevity depends on the extent of the overhaul and parts replacement. If all four matching parts are replaced, the crankshaft and bearing shells are in good condition, and the oil seals are renewed, the engine can run another 100,000 or even 200,000 kilometers without issues. 2. Cylinder boring is necessary when the engine has been running for a long time, causing severe cylinder wear, which inevitably leads to "oil leakage." This results in symptoms like burning oil, reduced power, and increased fuel consumption. 3. Cylinder boring is a common repair method for excessively worn dry cylinder liners. Since a thin layer is "polished" off the cylinder wall surface, the cylinder diameter inevitably becomes slightly larger.