The Mitsubishi 4N15 2.4 liter diesel engine was introduced in 2015 and has since been installed on such popular models as the Mitsubishi L200 and Pajero Sport. This unit features an aluminum cylinder block, MIVEC phasing system and variable geometry turbine. It has been designed to increase power and fuel efficiency while maintaining high environmental standards. Despite its modern design and technological solutions, the 4N15 engine has some peculiarities and problems that are worth considering when operating.
Mitsubishi 4N15 engine specifications
| Characteristics | Reference |
|---|---|
| Modification | 4N15 MIVEC 2.4 Di-D 16v |
| Volume | 2442 cm³ |
| Power | 154 – 181 hp |
| Torque | 380 – 430 Nm |
| Power system | Common Rail |
| Compression ratio | 15.5 |
| Cylinder diameter | 86 mm |
| Piston stroke | 105.1 mm |
| Cylinder block | Aluminum |
| Cylinder head | Aluminum, 16 valves |
| Transmission timing | Chain |
| Fasor regulator | MIVEC |
| Turbocharger | Variable geometry turbine |
| Oil | 8.4 liters, 5W-30 |
| Ecological class | Euro 5 |
| Example service life | 300,000 km |
| Engine weight | 163 kg |
The 4N15 engine is designed to meet high demands for environmental friendliness and performance. Its aluminum cylinder block reduces weight and improves thermal efficiency, which is important for modern diesel engines. The variable geometry turbocharging (VGT) system provides optimum pressure at different revs, improving traction at low speeds and efficiency at high speeds.
Which vehicles are fitted
| Vehicle Model | Production period |
|---|---|
| Mitsubishi L200 5 (KK) | 2015 to present |
| Pajero Sport 3 (KS) | 2015 – present |
The 4N15 engine is used in the Pajero Sport SUV and L200 pickup truck, which are known for their ruggedness and ability to perform in demanding environments. These vehicles are actively used in both urban and extreme conditions, which speaks for the reliability and durability of the engine.
Main problems and disadvantages of the 4N15 engine
Despite the fact that the 4N15 engine has been produced since 2015 and during this time has not received mass complaints, owners still face some problems. Most of the problems are associated with operation in conditions of low quality fuel and oil, as well as with the peculiarities of the design, which requires careful maintenance.
- Fast clogging of the particulate filter. Poor fuel quality causes the particulate filter to clog, which can cause loss of power and reduced engine efficiency. This is one of the most common problems for modern diesel engines, especially in regions with poor fuel quality.
- Exhaust Gas Recirculation (EGR) valve. A clogged EGR valve leads to poor engine performance and increased fuel consumption. The problem manifests itself through the formation of soot, which restricts the flow of gases.
- Piezo injectors. Like other modern diesel systems, the 4N15 engine is equipped with piezo injectors that are sensitive to fuel quality. If you use low-quality fuel, the injectors can fail before their due date, which usually happens before the mileage of 100,000 km.
- G timing chain. Early versions of the engine had problems with the life of the timing chain, which sometimes required replacement before 100,000 km. In later versions, the chain life has been extended.
- Clogging of the intake manifold flaps. During operation, the flaps can accumulate soot and carbon deposits, which leads to their seizure and errors in the engine control unit.
Operation and maintenance recommendations
To ensure long and reliable operation of the 4N15 engine, it is important to follow the recommendations for operation and maintenance, especially in Russian conditions, where the quality of fuel and lubricants may vary.
- Use quality fuel and oil. Since 4N15 is sensitive to the quality of fuel and lubricants, it is important to fill only proven products. Saving on fuel or oil can lead to premature failure of injectors and other important elements.
- Timely replacement of consumables. Oil and filters should be changed strictly according to the regulations to avoid the accumulation of dirt and soot in the engine.
- Regular maintenance of timing. The chain-driven timing gear requires periodic inspection and, if necessary, replacement to avoid costly engine repairs.
- Injector cleaning. Diesel injectors are prone to contamination, especially with poor quality fuel. Regular injector cleaning helps prevent power loss and engine performance deterioration.
- EGR and particulate filter maintenance. It is important to periodically check the condition of the exhaust gas recirculation system and particulate filter, and clean or replace them if necessary.
Conclusion
The Mitsubishi 4N15 engine is a high-tech diesel unit that offers several advantages such as a lightweight aluminum cylinder block, efficient turbocharging system and fuel efficiency. However, its sensitivity to fuel quality and the need for regular maintenance make its operation difficult in regions with poor quality diesel fuel. To extend engine life and avoid unexpected failures, it is necessary to strictly follow the operation and maintenance recommendations, especially with regard to the replacement of consumables and regular maintenance of the injection and gas recirculation systems.