Caterpillar C18 Diesel Engine | Specifications, Power, and Applications

🔧 Core Specifications

Engine Configuration: Inline 6-cylinder, 4-stroke diesel engine

Displacement: 18.1 liters (1104.5 cubic inches)

Bore × Stroke: 145 mm × 183 mm (5.7 in × 7.2 in)

Compression Ratio: 16.3:1

Induction: Turbocharged with Aftercooling (TA) or Twin Turbocharged with Aftercooling (TTA)

Combustion System: Direct Injection

Direction of Rotation: Counterclockwise from the flywheel

⚡ Power and Torque

Power Range: 429–597 kW (575–800 hp) @ 1800–2100 rpm

Maximum Torque: 2736 lb-ft (3710 Nm) @ 1300 rpm

Rated Speed: 1800–2000 rpm

🌍 Emission Standards

C18 The engine meets the following emission standards:

China Stage II

U.S. EPA Tier 3 Equivalent

EU Stage IIIA Equivalent

U.S. EPA Tier 2 Equivalent (select high-power versions)

Non-certified version (available in select markets)

📏 Dimensions and Weight

Length: 1414 mm (55.7 in)

Width: 974 mm (38.3 in)

Height: 1257 mm (49.5 in)

Dry Weight (base engine, no optional accessories): 1673 kg (3688 lb)

🌟 Key Features and Benefits
1. High Efficiency and Economy

The C18 engine provides powerful power output for a variety of heavy-duty operating conditions. The TTA version eliminates the need for diesel exhaust fluid (DEF), reducing long-term operating costs. The TA version features transparent regeneration technology and longer service intervals (e.g., 5,000 hours) for improved operating efficiency. Cat.com

2. Flexible Configuration and Compact Design

The C18 engine offers a variety of configuration options to meet diverse application requirements. Its compact design makes it suitable for installation in space-constrained environments, reducing installation costs.

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3. Reliability and Durability

The C18 engine is based on Caterpillar's proven design platform and undergoes rigorous testing to ensure long-term, stable operation. High-quality manufacturing processes and material selection ensure exceptional durability.

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4. Global Service and Support

Caterpillar's extensive global service network provides comprehensive technical support, parts availability, and repair services to ensure the reliable operation of the C18 engine worldwide. Cat.com

🛠️ Applications

C18 engines are widely used in the following industries and equipment:

Agriculture: Tractors, irrigation equipment

Construction: Rollers, cranes, concrete mixers

Mining: Drilling rigs, mining equipment

Material handling: Conveyors, crushers, screening equipment

Marine propulsion: Commercial vessels, fishing boats

Power generation: Standby generator sets, mobile power generation units

📈 Performance Comparison (Compared to C15 Series)
Parameters C18 C15
Power Range 429–800 hp 335–580 hp
Maximum Torque 2736 lb-ft @ 1300 rpm 1958 lb-ft @ 1400 rpm
Displacement 18.1 L 15.2 L
Dimensions (L × W × H) 1414 mm × 974 mm × 1257 mm 1340 mm × 890 mm × 1180 mm
Dry Weight 1673 kg 1470 kg

The C18 offers higher power and torque than the C15, making it suitable for applications requiring greater power.

Accessories and Options

The C18 engine offers a variety of accessories and options to meet the needs of different applications, including:

Cooling System: Standard or High-Ambient Cooling

Exhaust System: Standard or Low-Emission

Fuel System: Standard or Low-Sulfur

Control System: Standard or Advanced Electronic Control

Select the appropriate configuration and options to meet your specific application needs, ensuring optimal engine performance.