What is the difference between dry and wet engine types?

[StBryce]

The difference between dry and wet engine types lies in the cylinder liners: dry cylinder liners do not come into contact with coolant and have a wall thickness of 2 to 3mm; wet cylinder liners have direct contact with coolant on the outer wall and a wall thickness of 5 to 8mm. The function of an engine is to convert the thermal energy of gasoline or diesel into mechanical energy by burning the fuel in a sealed cylinder, causing the gas to expand and push the piston to perform work. Engine maintenance items include: 1. Regularly changing the engine oil and oil filter; 2. Maintaining good crankcase ventilation; 3. Regularly cleaning the crankcase; 4. Periodically cleaning the fuel system; 5. Regular maintenance of the radiator; 6. Cleaning and maintenance of the fuel system.