Details
Genuine DCEC Cummins ISLe350-30 Vehicle Engine (8.9L, 258kW/350HP)
When engineering fleets and OEMs require reliable pulling power without the severe weight penalties of a heavy-bore block, the Cummins ISLe350-30 vehicle engine is a premier choice. Manufactured by the Dongfeng Cummins Engine Company (DCEC), this 8.9L Cummins diesel engine bridges the gap between medium-duty agility and heavy-duty durability.
Delivering a rated output of 258kW (350HP) at 2100 rpm, the ISLe350-30 is specifically calibrated for the grueling demands of the commercial sector. Its 6-cylinder, inline architecture provides exceptional structural rigidity, making it the preferred power plant for heavy trucks, long-distance commercial vehicles, and high-capacity buses operating under Euro III emission standards. As an established global engine supplier, HekoPower provides both complete Cummins ISLe350-30 replacement engines and genuine aftermarket support for fleet repower projects.
Tech Specs of Cummins ISLe350-30
General Engine Data
Engine Model: Cummins ISLe350-30
Type: 6 Cylinders in Line
Displacement: 8.9 L
Bore * Stroke: 114 * 144.5
Net Weight (with flywheel & alternator): 706 Kg
Overall Dimension: 1147mm*767mm*1104mm
Key Performance Data
Rated Power: 258 kW/350 HP
Rated Speed: 2100 rpm
Idle Speed: 600-800 rpm
Fuel Consumption @ Rated Power: 210 g/Kw.h
Max Continuous Running Altitude: 4500 m
Torque/Rated Speed: 1180 N.m @ 2100 rpm
Max. Torque/Speed: 1550 N.m @ 1400 rpm
Max. No-load Governed Speed: 2330 rpm
More Technical Data
Certification: Euro III
Aspiration: Turbocharged & Charge Air Cooled
Fuel System: Bosch Common rial (CCR)/ECM Governor
Compression Radio: 16.6:1
Starting System: Electrical Starting Motor 24V(750A)
Lowest Starting Temp Without auxiliary system: -12℃/-33℃
Cooling Method: Water cooled
Engine Cooling Fluid Volume: 11.1 L
Core Engineering Advantages of the ISLe350-30
The engineering footprint of the ISLe350-30 truck engine is defined by its impressive power-to-weight ratio. With a net weight of approximately 706 kg (including the flywheel and alternator), it avoids the excessive front-axle loading typical of larger 10-liter and 11-liter engines. The internal geometry features a 114 mm bore and 144.5 mm stroke, allowing the engine to generate deep, low-end lugging power essential for moving heavy payloads from a standstill.
A defining feature of this 8.9L engine is the integration of the Bosch common rail fuel system. Unlike older mechanical injection setups, the ISLe350-30 electronic fuel injection system utilizes a high-pressure common rail (CCR) managed by an advanced ECM. This ensures highly precise fuel atomization directly into the center of the cylinder. The result is superior combustion efficiency, resulting in optimized fuel consumption rates of approximately 210g/Kw.h at rated power, alongside reduced noise and vibration during long-haul operations.
Furthermore, the turbocharged and charge air-cooled aspiration system forces dense, oxygen-rich air into the combustion chamber. Paired with a 16.6:1 compression ratio, the ISLe350-30 ensures consistent thermal efficiency and rapid throttle response, even across varying altitudes and challenging topographies.
Real-World Application Scenarios
The Cummins ISLe350-30 is fundamentally designed as a heavy-duty vehicle engine. In the long-haul trucking sector, fleets favor this engine because it sustains cruising speeds effortlessly while minimizing fuel burn. The engine's ability to hold a massive 1550 N.m of peak torque at just 1400 rpm means drivers spend less time downshifting on steep gradients, which directly translates to reduced transmission wear and improved trip times.
Beyond freight, it is widely utilized as a dependable bus engine for intercity transits and commercial coaches. Passenger transport requires engines that provide smooth, linear acceleration without harsh vibrations. The ECM-governed injection and robust 6-cylinder balancing of the ISLe350-30 deliver exactly that, ensuring passenger comfort while meeting the strict reliability demands of municipal transport schedules.
Technical Comparisons for Engine Selection
When selecting a Cummins L Series power plant or planning a repower, it is crucial to understand how the ISLe350-30 compares to other engines within the DCEC lineup.
ISLe350-30 vs ISLe340-30
The jump from the 340HP variant to the ISLe350-30 is often misunderstood as just a minor software tweak. While they share the same 8.9L block and 706 kg dry weight, the ISLe350-30 is calibrated to sustain a slightly higher torque curve under maximum load. For fleets operating near maximum gross vehicle weight in hilly terrain, the 350HP engine provides the necessary safety margin for overtaking and grade climbing, without negatively impacting the baseline fuel consumption.
Cummins ISLe350-30 vs ISLe375-30
When comparing the ISLe350-30 350HP against the 375HP Cummins variant, the decision comes down to application severity. The ISLe375-30 is pushed closer to the upper limits of the 8.9L architecture. While it offers more top-end horsepower, the ISLe350-30 is frequently chosen for its balance. It offers near-identical low-end torque (1550 N.m) but often yields slightly better long-term reliability and thermal management because it operates well within its internal stress thresholds.
Cummins ISLe350-30 vs C8.3
Many operators look to the ISLe350-30 as a replacement for older Cummins engines, particularly the mechanical 8.3L C-Series. The 8.9L ISLe series is essentially the modern evolution of the C8.3. The most significant difference is the electronic fuel system and the increased displacement. While the C8.3 is legendary for its mechanical simplicity, the ISLe350-30 offers vastly superior ECM engine diagnostics, tighter emissions control (Euro III vs Euro II), and significantly higher torque density thanks to the Bosch common rail system.
Maintenance and Repower Considerations
Maintaining the reliability of your ISLe350-30 heavy-duty vehicle engine requires strict adherence to fluid schedules, particularly concerning the Bosch fuel components. A common misconception in fleet maintenance is that standard diesel fuel filtration is sufficient. The high-pressure common rail system operates at extreme tolerances; therefore, utilizing OEM-spec primary and secondary water separators is absolutely critical to prevent microscopic debris from scarring the fuel injectors.
If you are executing an ISLe350-30 engine replacement or upgrading an older chassis, pay close attention to the electrical harnesses. Because this is an ECM-governed engine, upgrading from a purely mechanical engine will require integrating the Cummins electronic throttle pedal and diagnostic ports into the vehicle's cab. Furthermore, ensure the cooling system can handle the 11.1 L engine coolant volume and the demands of the charge air cooler. HekoPower serves as a direct wholesale supplier not only for the complete engine assembly but also for genuine DCEC ISLe350-30 replacement parts, ensuring your maintenance or repower project is completed with factory-correct components.
Expanding Your L-Series Options
While the 350HP variant offers an exceptional balance of power and efficiency, we recognize that different vehicle chassis and operational routes demand specific horsepower nodes. To ensure our clients have access to the exact specifications their fleets require, we supply the full spectrum of Dongfeng Cummins L-Series power plants.
DCEC ISDe Series, original products from Dongfeng Cummins Engine Plant (DCEC), Cummins Joint Venture Plant since 1986, 50% shareholding by Cummins USA. This series mainly includes ISLe270-30, ISLe290-30, ISLe300-30, ISLe310-30, ISLe325-30, ISLe340-30, ISLe350-30, ISLe375-30.
Frequently Asked Questions Regarding the Cummins ISLe350-30
Is this a genuine Cummins engine or a copy?
This is a 100% Genuine DCEC Cummins ISLe350 engine assembly built by the Dongfeng Cummins Joint Venture plant in China. It features authentic Cummins serial numbers that can be verified globally via the Cummins QuickServe system.
Is the ISLe350-30 suitable as a replacement for older Cummins engines?
Yes, it is highly popular for repower projects. However, because it utilizes an electronic fuel injection system and an ECM, buyers must ensure their vehicle is wired to support the electronic throttle and diagnostic sensors.
How do I source authentic components for this engine?
As an established engine exporter and China supplier, HekoPower provides original DCEC ISLe350-30 engines for sale alongside a comprehensive catalog of genuine maintenance parts, including overhaul kits, ECMs, and Bosch injection pumps.
What warranty coverage comes with the engine?
Every Factory New Cummins ISLe350 supplied by HekoPower includes a standard international warranty covering major components—including the engine block, crankshaft, and camshaft—for 12 months or 100,000 kilometers, whichever occurs first. We supply genuine Cummins ISLe350-30 Spare Parts directly for any necessary warranty servicing.
What is the standard lead time and packaging?
Complete engines are typically secured on robust wooden skids with dimensions around 1147mm x 767mm x 1104mm to protect the oil pan and accessories during international transit. HekoPower can confirm exact engine price and lead time based on your specific order volume and destination.
