What is the lifespan of the JMC Yusheng S350 diesel engine?
2 Answers
The lifespan of the JMC Yusheng S350 diesel engine is approximately 6 years. The following signs indicate that the engine requires an overhaul: Cylinder pressure difference: The cylinder compression pressure should meet the original design specifications. Check with a tachometer and cylinder pressure gauge. Failure to meet requirements is considered unqualified. Pressure difference between cylinders: The difference between each cylinder's pressure and the average pressure of all cylinders should not exceed 8%. Measure with a tachometer, cylinder pressure gauge, or engine comprehensive analyzer (engines that do not meet the standard cylinder pressure difference requirements are unqualified.) When the engine cylinder pressure is below the standard value, there will be severe black smoke emission. Large idle fluctuation: The engine should run stably at idle speed, with the speed conforming to the original design specifications. The speed fluctuation should not exceed 50 r/min. Conduct a running test with a tachometer or measure with an engine comprehensive analyzer. Low power: The engine's maximum power should not be less than 90% of the original design rated value. Measure with a dynamometer according to relevant regulations.
As a long-term owner of the Jiangling Yusheng S350 for ten years, I can honestly say that with proper maintenance, this diesel engine can easily run 400,000 kilometers. My own vehicle, purchased in 2014, now shows 320,000 km on the odometer, and the engine has never undergone major repairs. Diesel engines are far more durable than gasoline ones, with their low-speed high-torque design naturally suited for long-term heavy-duty work. However, never skimp on quality by using inferior diesel fuel, as poor fuel quality can easily clog the fuel injectors. Stick to changing the engine oil every 8,000 km, and clean the air filter more frequently, especially when driving in dusty construction sites. I remember a friend’s engine failing prematurely due to a clogged radiator causing overheating, which resulted in piston ring damage—these details really can’t be overlooked.
