Answers to Common Misunderstandings About Diesel Engines: These Wrong Operations Will Shorten Equipment Life!

Misunderstanding 1: The higher the engine speed, the more powerful it is

Many users mistakenly believe that the higher the diesel engine speed, the stronger the power, so they often step on the accelerator to increase the speed during use, even exceeding the rated speed. In fact, each diesel engine has a fixed rated speed (such as 1500r/min, 1800r/min), which is the optimal speed for power and fuel consumption. Exceeding the rated speed for a long time will cause excessive wear of crankshaft, connecting rod and other parts, increase fuel consumption, and even lead to engine overheating and cylinder scuffing.

Misunderstanding 2: No need to warm up the engine before starting

Some users think that diesel engines can be started and put into load immediately, ignoring the warm-up process. Especially in low-temperature environments, the oil viscosity is high, and the lubrication effect of each part is poor. If the engine is loaded immediately after starting, the friction between parts will increase, resulting in serious wear of bearings, cylinder liners and other components. The correct operation is to start the engine and idle for 3-5 minutes, wait for the oil temperature and water temperature to rise to the normal range, and then put it into use.

Misunderstanding 3: The thicker the engine oil, the better the lubrication effect

There is a common misunderstanding that the thicker the engine oil, the better the lubrication performance. In fact, the choice of engine oil should be based on the engine model and working environment. If the oil viscosity is too high, it will increase the resistance of the oil circuit, reduce the lubrication efficiency, and even affect the startup of the engine in low temperature; if the viscosity is too low, it will not form an effective oil film, leading to increased wear of parts. It is recommended to choose the oil grade specified by the manufacturer (such as better than CD15W/40).

Misunderstanding 4: It doesn’t matter if the cooling water is insufficient

Some users do not pay attention to checking the cooling water level, and even continue to use the engine when the cooling water is insufficient. The cooling system is the key to ensuring the normal operation of the diesel engine. Insufficient cooling water will cause the engine temperature to rise sharply, leading to cylinder scuffing, piston melting and other serious faults. In addition, it is not allowed to add cold water directly when the engine is overheated, otherwise the cylinder head and cylinder block may crack due to sudden temperature change.

Misunderstanding 5: Fuel can be added at will, regardless of quality

The quality of diesel fuel directly affects the service life of the engine. Some users choose low-quality diesel fuel to save costs, which contains a lot of impurities and water. These impurities will wear the fuel injection pump, injector and other parts, block the oil circuit, and reduce the combustion efficiency; the water in the fuel will cause corrosion of the fuel system and affect the normal combustion of the engine. It is recommended to use qualified diesel fuel that meets the standard.

In short, the correct use and maintenance of diesel engines is the key to extending their service life. Avoiding the above misunderstandings and standardizing operating habits can effectively reduce the failure rate of the engine and save maintenance costs. For more detailed operation specifications, please refer to the engine operation manual.