What should be noted during an engine overhaul?

[MaggieLynn]

During an engine overhaul, it is important to avoid excessively high engine speeds, not exceeding 3000 RPM. After a cold start, allow for a warm-up period until the water temperature changes before driving, typically around 5 minutes. Adhere to the vehicle's specified load capacity and avoid exceeding 70% of the maximum load. Try to avoid sudden acceleration and hard braking. It is recommended to change the engine oil as soon as the break-in period is completed. In summary, the cost of materials and labor for a major engine overhaul can be substantial, often amounting to a quarter or even a third of the vehicle's purchase price, and the performance of the vehicle after the overhaul may not fully return to the level of a new car.