1. Use lubricating oil of appropriate quality grade
For gasoline engine, sd-sf grade gasoline engine oil should be selected according to the additional devices and service conditions of the intake and exhaust system; for diesel engine, cb-cd grade diesel engine oil should be selected according to the mechanical load, and the selection standard should not be lower than the requirements specified by the manufacturer.
2. Change the engine oil and filter element regularly
Any quality grade of lubricating oil will change during use. After a certain mileage, the performance will deteriorate, which will bring various problems to the engine. In order to avoid the occurrence of faults, the oil should be changed regularly according to the service conditions, and the oil quantity should be moderate. When the oil passes through the fine hole of the filter, the solid particles and viscous substances in the oil accumulate in the filter. If the filter is blocked and the oil can not pass through the filter element, it will burst the filter element or open the safety valve and pass through the bypass valve, which will still bring the dirt back to the lubricating part, causing the engine to wear and internal pollution to intensify.
3. Keep the crankcase well ventilated
At present, most gasoline engines are equipped with PCV valve to promote engine ventilation, but the pollutants in the blowby "will deposit around the PCV valve, which may block the valve. If the PCV valve is blocked, the polluted gas will flow into the air filter reversely, contaminate the filter element, reduce the filtration capacity, and the inhaled mixture is too dirty, which will further cause the pollution of the crankcase, increase the fuel consumption, increase the engine wear, and even damage the engine. Therefore, the PCV must be maintained regularly to remove the pollutants around the PCV valve.
4. Clean the crankcase regularly
During the operation of the engine, the high pressure unburned gas, acid, water, sulfur and nitrogen oxides in the combustion chamber enter the crankcase through the gap between the piston ring and the cylinder wall, and mix with the metal powder produced by the wear of parts to form sludge. When the amount is small, it will be suspended in the oil. When the amount is large, it will precipitate from the oil and block the filter and oil hole, causing the engine lubrication difficulty and wear. In addition, when the engine oil is oxidized at high temperature, it will produce paint film and carbon deposit and stick to the piston, which will increase the fuel consumption and reduce the power of the engine. In serious cases, the piston ring will be stuck and the cylinder will be pulled. Therefore, clean the crankcase regularly to keep the engine clean.
5. Maintain the water tank regularly
Engine water tank rust, scaling is the most common problem. Rust and scale will restrict the flow of coolant in the cooling system, reduce the heat dissipation effect, cause engine overheating, and even cause engine damage. The oxidation of the coolant will also form acidic substances, corroding the metal parts of the water tank, causing damage and leakage of the water tank. Regular use of the cleaning water tank to remove rust and scale can not only ensure the normal operation of the engine, but also extend the overall life of the water tank and engine.