Details
Cummins ISME345-30 Engine Assembly: 10.8L 345HP Xi’an Cummins Heavy-Duty Power Solution
The Cummins ISME345-30 is a 10.8-liter, 6-cylinder inline diesel engine manufactured by Xi'an Cummins Engine Co., Ltd. (XCEC). Delivering a rated output of 254kW (345HP) at 1900 rpm and peak torque of up to 1710 Nm, this power unit is built specifically for heavy-duty commercial vehicles operating under Euro III emission standards.
As a specialized engine exporter and supplier, HekoPower provides complete Cummins ISME345-30 engine assemblies and factory-direct replacement units. Whether you are replacing a worn-out motor in a 6x4 tractor truck or sourcing reliable power plants for construction fleets, understanding the exact technical profile of the ISME345-30 ensures optimal fleet uptime and cost-effective maintenance.
Tech Specs of Cummins ISME345-30
General Engine Data
Engine Model: Cummins ISME345-30
Type: 6 Cylinders in Line
Displacement: 10.8 L
Bore * Stroke: 114 * 144.5
Net Weight (with flywheel & alternator): 940 Kg
Overall Dimension: 1135mm*825mm*1159mm
Key Performance Data
Rated Power: 254 kW/345 HP
Rated Speed: 1900 rpm
Torque/Rated Speed: 1280 N.m @ 1900 rpm
Max. Torque/Speed: 1710 N.m @ 1200 rpm
More Technical Data
Certification: Euro III
Aspiration: Turbocharged & Charge Air Cooled
Fuel System: Cummins Fuel System/EMC876
Compression Radio: 16.2:1
Starting System: Electrical Starting Motor 24V(750A)
Lowest Starting Temp Without auxiliary system: -10℃/-25℃
Cooling Method: Water cooled
Firing Order: 1-5-3-6-2-4
Real-World Commercial Application Scenarios
The Cummins ISME345-30 is designed for heavy commercial vehicles requiring steady power without the complex post-treatment systems found in higher emission classes.
Heavy-Duty Tractor Trucks and Logistics Fleets
Long-haul logistics trucks carrying heavy trailers rely on the 345HP output for consistent highway cruising speeds. The flat torque curve allows drivers to maintain momentum on highway grades with fewer downshifts, minimizing transmission wear and driver fatigue.
Dump Trucks, Construction Vehicles, and Concrete Mixers
In off-road construction sites, dump trucks and cement mixers operate in stop-and-go conditions under full GVW (Gross Vehicle Weight). The ISME345-30 engine assembly delivers the rugged low-end grunt needed to pull loaded 6x4 and 8x4 truck chassis out of soft dirt and steep quarry pits.
Technical Performance Comparisons
Choosing the correct replacement engine requires evaluating horsepower, torque output, and emission architecture against similar models in the Cummins ISMe family.
ISME345-30 vs. ISME335-30 and ISME360-30
While sharing the identical 10.8-liter block, the ISME345-30 offers a noticeable step up in pulling capacity over the entry-level ISME335-30. The 10 horsepower increase paired with higher peak torque gives heavy trucks better acceleration under load. Compared to the ISME360-30, the 345HP variant operates at lower peak cylinder pressures, which can result in longer overall component life in applications where maximum horsepower is not strictly required.
ISME345-30 vs. ISME385-30
Fleet operators often debate between the ISME345-30 and the higher-rated ISME385-30. The ISME385-30 provides 385HP for extreme heavy-haul operations, but it subjects drivetrain components to higher thermal and mechanical stress. For standard regional haulers, 6x4 dump trucks, and mixed fleet operations, the ISME345-30 delivers an ideal middle ground between working capacity, fuel economy, and reduced maintenance costs.
ISME345-30 vs. ISM11E4-345 and ISM11E5-345
The fundamental difference between the ISME345-30 and ISM11 engines rated for Euro IV or Euro V standards lies in the exhaust treatment and electronic management systems. The Euro III ISME345-30 does not require Selective Catalytic Reduction (SCR) or AdBlue/DEF injection systems. This simplified setup makes the ISME345-30 far easier to maintain in regions where high-sulfur diesel fuel is prevalent or where DEF infrastructure is limited.
Common Misconceptions Regarding the ISME345-30 Engine
Misunderstandings about engine specifications often lead buyers to select the wrong replacement units or misdiagnose performance issues.
Misconception 1: "345HP is Underpowered for Heavy-Duty 6x4 Trucks"
Many operators assume higher horsepower ratings are always necessary. However, heavy vehicle performance relies heavily on torque rather than peak horsepower alone. The 1710 Nm torque rating of the ISME345-30 provides ample power to pull heavy combinations efficiently without unnecessary fuel burn.
Misconception 2: "Xi'an Cummins (XCEC) Engines Differ from Global Cummins Specifications"
Xi'an Cummins is a joint venture operating under strict global manufacturing standards set by Cummins Inc. An XCEC ISME345-30 engine assembly uses genuine global design blueprints, materials, and quality control protocols. Genuine XCEC parts are fully interchangeable with corresponding international Cummins 10.8L ISM series components.
Misconception 3: "A Euro III Engine Can Be Upgraded to Euro IV by Just Changing the ECM"
Upgrading a Euro III ISME345-30 to meet Euro IV or Euro V standards requires far more than software adjustments. Euro IV models feature different wiring harnesses, fuel injectors, turbocharger matching, and exhaust post-treatment hardware. Attempting to force higher emission calibrations on a base Euro III engine without mechanical modifications causes severe engine knocking and hardware failure.
Practical Maintenance, Troubleshooting, and Engine Replacement Guidelines
Proper diagnostic routines keep your ISME345-30 running at peak performance and prevent premature engine overhauls.
Diagnostic Solutions for Common Performance Issues
Low Engine Power: Inspect the fuel lines for air leaks, check fuel filter restriction gauges, and evaluate the boost pressure sensor readings. A clogged fuel injector or damaged turbocharger wastegate often causes sudden drops in power.
Excessive Black Smoke: This condition indicates incomplete combustion, usually caused by restricted intake air filters, failing fuel injectors delivering incorrect spray patterns, or boost leaks in the charge air cooler piping.
Engine Overheating: Check the cooling system for radiator core blockages, inspect fan clutch engagement, and test the coolant thermostats. Ensure the correct coolant mixture is maintained to prevent scale buildup inside the 10.8L block cooling passages.
Hard Starting: Check the primary fuel supply system, verify battery voltage to the electronic control module (ECM), and perform an injector leak-back test to ensure correct fuel rail pressure during cranking.
Inspection Checklist Before Installing a Replacement Engine Assembly
Before dropping a new engine assembly into a commercial vehicle, verify that the radiator and charge air cooler are thoroughly flushed to remove debris from the previous failure. Check all chassis engine mounts, inspect the transmission flywheel housing alignment, and ensure the vehicle wiring harness connectors are clean and free from corrosion.
Sourcing Genuine Replacement Parts
When conducting routine service or major overhauls, always source genuine replacement components. Critical wear items include high-pressure fuel injectors, turbocharger assemblies, piston kits, main bearings, and cylinder head gaskets. Using substandard aftermarket parts risks severe cylinder scoring and premature engine failure under heavy loads.
Xi'an Cummins ISMe Series Models and Fleet Compatibility
To help fleet managers and procurement specialists match exact power ratings across the XCEC ISMe heavy-duty engine lineup, HekoPower maintains a complete inventory of companion models and genuine spare parts.
Cummins ISMe Series, original products from Xi’an Cummins Joint Venture Plant (XCEC), since 1986, 50% owned by Cummins USA, under Cummins Technical & Product Line. This series mainly includes ISME308-30, ISM11E4 308, ISME335-30, ISME345-30, ISM11E4 345, ISM11E5 345, ISME 360-30, ISME 380-30, ISME 385-30, ISM11E4 385, ISM11E5 385, ISM405E-20, ISME 420-30, ISM11E4 420, ISM11E5 420, ISM11E4 440, ISM11E5 440.
Frequently Asked Questions (FAQ)
How do I verify if my engine is a genuine XCEC Cummins ISME345-30?
You can confirm authenticity by checking the metallic engine data plate located on the rocker lever cover or gear housing. The data plate displays the unique Engine Serial Number (ESN), engine model code (ISME345-30), build date, and XCEC factory stamping. You can cross-reference this ESN directly through Cummins QuickServe or contact HekoPower for verification.
What is the lead time and warranty coverage when ordering from HekoPower?
Standard complete engine assemblies carry a 12-month factory warranty covering core structural components. Our typical export lead time is approximately 10 business days. Engines are packed in heavy-duty wooden cases designed for safe ocean and air freight transport.
Can the ISME345-30 replace an older Cummins M11 or ISM engine?
Yes, in many commercial truck chassis, the ISME345-30 serves as a direct replacement unit for older M11 or mechanically managed engines. However, physical engine mount spacing, flywheel housing SAE sizing, and ECM wiring harness integration must be checked prior to installation. Our technical support team can assist in verifying cross-compatibility for your specific vehicle chassis.
