1. The water channel is connected with the oil channel. It is recommended to check whether there is a lack of oil. The engine is poorly lubricated due to insufficient engine oil, and the engine heats up quickly.
2. However, the cylinder liner is flushed. It is recommended to check whether there is water in the engine oil, whether the engine oil is emulsified, whether the lubrication is poor, and whether the engine heats up quickly.