In our previous discussion, we introduced some of the precautions for the daily use of Yunnei long-life engines. Today, we will continue to expand on these points to provide you with a more comprehensive understanding. If you are driving a special model of Dayun, this knowledge is essential for ensuring the optimal performance and longevity of your vehicle.
The coolant plays a crucial role in maintaining the proper operating temperature of the engine. According to the ambient temperature, it is essential to fill the engine with coolant of the appropriate grade produced by regular manufacturers. This coolant should possess several important functions. Firstly, it must have antifreeze properties to prevent the engine from freezing in cold temperatures. Secondly, it should provide anticorrosion protection to prevent the engine’s metal parts from rusting and deteriorating. Additionally, it should be anti-boiling to ensure that the coolant does not boil over even at high engine temperatures. Antirust and anti-scaling properties are also necessary to prevent the formation of rust and scale deposits inside the cooling system.
Regularly check and confirm whether the coolant is sufficient. As the engine operates, coolant can gradually be consumed or lost due to leaks or evaporation. Therefore, it is important to inspect the coolant level regularly and supplement it as needed. This can be done by checking the coolant reservoir or using the dipstick provided in some engines. By maintaining an adequate level of coolant, you can ensure that the engine remains properly cooled and protected.
For example, imagine driving in a cold climate. If the coolant is not of the appropriate grade or is insufficient, the engine may be at risk of freezing, which can cause serious damage. On the other hand, in hot weather, a lack of coolant can lead to overheating, which can also result in engine damage. By following the proper coolant usage guidelines, you can avoid these potential problems and keep your engine running smoothly.
For diesel vehicles equipped with Yunnei long-life engines, the use of diesel vehicle-specific urea solution is essential. Please use urea solution (concentration of 32.5%) produced by regular manufacturers and within the validity period. This specific concentration is designed to work in harmony with the engine’s exhaust aftertreatment system to reduce harmful emissions.
When the liquid level in the urea tank is close to 10%, it is crucial to add urea aqueous solution. Running out of urea solution can cause the diesel engine to trigger fault alarms and significantly affect your normal use of the vehicle. During the addition process, be extremely careful not to dirty or contaminate the urea. Any contaminants can potentially clog the injection system or interfere with the proper functioning of the aftertreatment system.
It is also important to note that urea aqueous solution has a certain corrosiveness. Once it comes into contact with eyes, skin, or clothes, it should be rinsed with clean water immediately and seek medical treatment in time. This precaution is essential to protect your health and safety.
For instance, if you neglect to add urea solution when the tank is low, the engine’s performance may be restricted, and you may experience reduced power or even engine shutdown. By regularly checking the urea level and using high-quality urea solution, you can ensure that your vehicle’s emissions control system functions properly and that you avoid potential problems.
When performing maintenance on your Yunnei long-life engine, safety should always be a top priority. To protect your safety, it is strictly prohibited to repair or disassemble high-pressure fuel pipes of the engine, relevant pipelines of the SCR system, various rotating moving parts, high-temperature parts, and so on while the engine is running. These components are under high pressure, in motion, or at elevated temperatures, and attempting to work on them can lead to serious injuries.
For example, if you attempt to repair a high-pressure fuel pipe while the engine is running, there is a significant risk of fuel spraying out under high pressure, which can cause burns or other injuries. Similarly, working on rotating parts or high-temperature components can result in cuts, burns, or other accidents. Always ensure that the engine is turned off and cooled down before attempting any maintenance on these critical components.
Requirements and precautions for the use of exhaust gas purifiers:
The engine’s exhaust gas purifiers, such as DOC (Diesel Oxidation Catalyst) and SCR (Selective Catalytic Reduction) catalytic converters, play a vital role in reducing emissions. To minimize clogging and damage to these components and prevent excessive emissions, try to avoid long-term low-speed driving of the vehicle or low-speed operation of the engine. Prolonged low-speed operation can lead to the accumulation of soot and other contaminants in the exhaust system, reducing the effectiveness of the purifiers and potentially causing problems.
When the exhaust gas catalytic purification system is working, it will release a large amount of heat. Even in a short time after the engine is turned off, these components can remain hot and pose a fire hazard. Therefore, do not park the vehicle on any inflammables such as paper, dry grass, dry fallen leaves, or other combustible materials for operation or parking. This precaution is essential to prevent accidental fires.
For example, if you park your vehicle on dry grass after a long drive and the exhaust system is still hot, there is a risk of the grass catching fire. By being aware of the heat generated by the exhaust system and taking appropriate precautions, you can avoid potential disasters.
Do not suddenly stop the vehicle when the temperature is too high and the load is too large:
Under conditions of high temperature and heavy load, suddenly stopping the vehicle can cause significant damage to the diesel engine or turbocharger. When the engine is under high stress, it needs time to cool down gradually. Abruptly shutting off the engine can lead to thermal shock and uneven cooling, which can damage internal components.
For instance, if you are driving up a steep hill with a heavy load and the engine is running hot, suddenly stopping the vehicle can cause the turbocharger to overheat and potentially fail. By allowing the engine to idle for a few minutes before shutting it off under such conditions, you can give it time to cool down and reduce the risk of damage.
Before plugging in and unplugging wire harness connectors:
When working with the electrical system of your vehicle, it is crucial to follow proper procedures. Before plugging in or unplugging wire harness connectors, remember to turn off the ignition switch and battery switch first. This step is essential to prevent electrical shocks and damage to the electrical components.
After plugging in the connectors, ensure reliable connection of wire harness connectors before starting the vehicle. Loose or improperly connected connectors can lead to electrical malfunctions, warning lights, or even engine failure.
For example, if you unplug a wire harness connector without turning off the power, there is a risk of short circuits or electrical damage. By following the correct procedures, you can ensure the integrity of the electrical system and avoid potential problems.
It is prohibited to use a high-pressure water gun to wash the entire vehicle and all electrical appliances and wire harness connector parts of the engine electronic control system:
Using a high-pressure water gun to wash the engine electronic control system and its associated electrical components can cause serious damage. Water can penetrate into connectors, sensors, and control units, leading to short circuits, corrosion, or malfunction.
For instance, if you spray a high-pressure water jet onto the engine’s electronic control unit, it can damage the internal circuitry and render the engine inoperable. Always use a gentle cleaning method or a specialized cleaner for these sensitive areas.
When performing welding operations:
When performing welding on the vehicle, it is essential to take proper precautions to protect the electrical and electronic systems. The main power supply must be turned off, and the positive and negative poles of the battery must be disconnected. Additionally, all plugs on the electronic control unit (ECU), SCR control unit (DCU), and sensors must be unplugged.
Welding can generate high electrical currents and heat, which can damage sensitive electronic components if not properly protected. By following these steps, you can prevent damage to the engine’s control systems and ensure the vehicle’s continued proper operation.
For example, if you perform welding without disconnecting the electrical components, the welding current can pass through the electronic control units and sensors, potentially frying them and causing expensive repairs.
After parking and turning off the engine:
After parking and turning off the engine, the electronic control unit (ECU) and SCR control unit (DCU) are still working for a short period. They are saving operation data and performing other essential tasks. Additionally, the urea pump is still cleaning the urea solution in the pipeline. To ensure your continuous normal use, please wait 60 seconds before turning off all power sources.
This waiting period allows the systems to complete their tasks and ensures that the engine is properly shut down. Prematurely turning off the power can disrupt these processes and potentially lead to problems in the future.
For instance, if you immediately turn off the power after shutting off the engine, it may interfere with the data saving process or leave the urea pump in an improper state, which can affect the engine’s performance and emissions control.
In case of engine failure and repair considerations:
In case of failure of the “Yunnei long-oil-change diesel engine” resulting in contamination of engine oil or damage to lubrication system parts, it is important to select special parts of the same model of “Yunnei long-oil-change diesel engine” for repair. During the repair process, ensure cleanliness and add long-life super engine oil and replace “long-life” oil filters, and so on. If regular maintenance is carried out properly, the engine can still be maintained according to the 50,000-kilometer interval.
However, if you insist on choosing the same model of Yunnei’s conventional diesel engine parts for maintenance and follow conventional maintenance procedures, a relevant warranty agreement will be re-signed. According to this, Yunnei Power will classify it as a conventional diesel engine, and the maintenance and three-guarantee period can only be implemented according to the conventional diesel engine. Conventional maintenance period: The first maintenance is within 5,000 kilometers of driving mileage or within 3 months (whichever comes first). Regular maintenance is every 10,000 kilometers of driving or 6 months after the first maintenance (whichever comes first). If the use environment is particularly harsh, the regular maintenance period should be appropriately shortened.
For example, if you experience engine failure and choose the wrong parts for repair, it can affect the engine’s performance and warranty coverage. By following the proper repair procedures and using the correct parts, you can ensure the longevity and reliability of your engine.
Special environments and maintenance adjustments:
For the “Yunnei long-oil-change diesel engine” used in environments with large amounts of dust/dust such as mining areas and cement plants, humid environments, and areas where diesel of national standard five and above cannot be filled, the maintenance specifications for conventional diesel engines shall be implemented. These harsh environments can accelerate wear and contamination of the engine, requiring more frequent maintenance.
For instance, in a dusty mining area, the engine is exposed to more contaminants, which can affect its performance and lifespan. By following the appropriate maintenance guidelines for such environments, you can keep your engine running smoothly and minimize downtime.
Authorized maintenance and accessories:
To ensure your three-guarantee rights and interests and use reliability, you must go to Yunnei Power’s service stations, accessory agents, or other sales outlets authorized by Yunnei for maintenance or purchase of accessories. These authorized locations have the expertise and access to genuine parts to ensure the proper care and maintenance of your engine.
Using unauthorized service providers or counterfeit parts can lead to subpar performance, increased risk of failure, and potential voiding of your warranty.
For example, if you purchase cheap, counterfeit parts from an untrusted source, they may not meet the quality standards required for your engine, leading to premature wear and breakdowns.
Adhere to recommended maintenance schedules and technical specifications:
Please carry out maintenance in strict accordance with the time and technical specifications recommended in the “User Manual” and “Service Manual.” Improper use or maintenance may cause engine failures and affect your right to use and warranty. Following the manufacturer’s guidelines ensures that your engine receives the proper care and attention it needs to perform at its best.
For instance, if you skip scheduled maintenance intervals or use incorrect procedures, it can lead to problems such as reduced fuel efficiency, increased emissions, and potential engine damage.
Warm reminder: The emission standard of the engine will be changed accordingly according to national policies. Therefore, the use and maintenance of the engine will change over time. It is important to stay informed about these changes and adapt your maintenance practices accordingly to ensure the continued proper operation and compliance of your vehicle.
In conclusion, understanding and following these precautions for the daily use of Yunnei long-life engines is essential for maximizing their performance, longevity, and reliability. By taking proper care of your engine and adhering to the recommended guidelines, you can enjoy a smooth and trouble-free driving experience while protecting your investment and the environment.
