Used Caterpillar C18 Diesel Engine for Sale | 18.1L Turbo Rebuilt for Excavators & Mining Equipment

Used Cat C18 Turbo Diesel | 18.1L Rebuilt for Mining & Heavy Equipment

Parameter	Specification
Engine Model	Caterpillar C18 / C18 ACERT
Type	Inline 6 Cylinder, 4‑Stroke, Water‑Cooled Diesel
Displacement	18.1 L (1104.5 in³)
Bore × Stroke	145 mm × 183 mm (5.7 in × 7.2 in)
Compression Ratio	16.0:1 to 16.3:1
Max Power (Tier 2/Tier 3)	Up to 800 HP (597 kW) @ 1800‑2100 RPM
Max Power (Tier 4 Final)	755‑800 HP (563‑597 kW) @ 1800‑2100 RPM
Max Torque	Up to 3,710 N·m (2,736 lb‑ft) @ 1,300‑1,400 RPM
Aspiration	Turbocharged Aftercooled (TA) or Twin Turbocharged Aftercooled (TTA)
Fuel System	MEUI (Mechanical Electronic Unit Injector) with ACERT Technology
Combustion System	Direct Injection
Emission Standards	Tier 2 equivalent, Tier 3 equivalent, Tier 4 Final, EU Stage V
Rotation (Flywheel End)	Counterclockwise
Control System	ADEM A4 Electronic Control Unit (ECU)
Length	1,414‑1,549 mm (55.7‑61 in)
Width	973‑1,143 mm (38.3‑45 in)
Height	1,257‑1,346 mm (49.5‑53 in)
Dry Weight	1,673‑1,757 kg (3,688‑3,875 lb)
Aftertreatment	DOC (Diesel Oxidation Catalyst) or DOC+DPF+SCR

Category Caterpillar Engine

Are you looking for a high-horsepower used diesel engine for your mining truck or large excavator? This fully rebuilt Caterpillar C18 diesel engine delivers proven performance for demanding heavy equipment applications. With 18.1L displacement and a twin-turbocharged inline 6-cylinder design, this used engine for sale is a trusted power solution for Caterpillar mining trucks, excavators, wheel loaders, and other large machinery. This engine comes in multiple rating configurations. These configurations meet emission standards ranging from Tier 2 equivalent up to Tier 4 Final and EU Stage V. We have completely overhauled this used engine for sale to restore its original factory performance. It gives you a cost‑effective way to keep your heavy equipment working.

Applications & Compatibility

Mining Trucks: Direct fit for Caterpillar 773D, 773E, 775D, 775E, and 777 haul trucks
Excavators: Suitable for Caterpillar 336E, 336F, 345C, 349D, and 349E large excavators
Wheel Loaders: Fits Caterpillar 972H, 980H, 980K, and 982M series loaders
Power Generation: Industrial generator sets up to 800 HP
Industrial Equipment: Bore/drill rigs, crushers, grinders, pumps, hydraulic power units, dredgers, and surface hauling equipment
Agriculture: Large agricultural tractors and mobile earthmoving equipment
Marine: Suitable for certain marine vessel applications requiring 800 HP propulsion

Technical Specifications

Parameter	Specification
Engine Model	Caterpillar C18 / C18 ACERT
Type	Inline 6 Cylinder, 4‑Stroke, Water‑Cooled Diesel
Displacement	18.1 L (1104.5 in³)
Bore × Stroke	145 mm × 183 mm (5.7 in × 7.2 in)
Compression Ratio	16.0:1 to 16.3:1
Max Power (Tier 2/Tier 3)	Up to 800 HP (597 kW) @ 1800‑2100 RPM
Max Power (Tier 4 Final)	755‑800 HP (563‑597 kW) @ 1800‑2100 RPM
Max Torque	Up to 3,710 N·m (2,736 lb‑ft) @ 1,300‑1,400 RPM
Aspiration	Turbocharged Aftercooled (TA) or Twin Turbocharged Aftercooled (TTA)
Fuel System	MEUI (Mechanical Electronic Unit Injector) with ACERT Technology
Combustion System	Direct Injection
Emission Standards	Tier 2 equivalent, Tier 3 equivalent, Tier 4 Final, EU Stage V
Rotation (Flywheel End)	Counterclockwise
Control System	ADEM A4 Electronic Control Unit (ECU)
Length	1,414‑1,549 mm (55.7‑61 in)
Width	973‑1,143 mm (38.3‑45 in)
Height	1,257‑1,346 mm (49.5‑53 in)
Dry Weight	1,673‑1,757 kg (3,688‑3,875 lb)
Aftertreatment	DOC (Diesel Oxidation Catalyst) or DOC+DPF+SCR

Key Features

Proven Caterpillar Reliability: The C18 engine has a rugged cast iron block and forged internal components. It is designed for continuous operation in demanding mining and construction environments. Many of these engines run for tens of thousands of hours with proper maintenance.
Excellent Power Density: The twin-turbocharged C18 delivers high power in a compact package. With up to 800 HP from an 18.1L displacement, this engine offers strong power density. It is a good fit for equipment with narrow engine compartments.
Multiple Emission Configurations: The C18 comes in several emission rating configurations. Depending on the variant, it meets Tier 2 equivalent, Tier 3 equivalent, Tier 4 Final, or EU Stage V standards. This gives you flexibility based on your job site requirements.
Advanced Fuel System with ACERT Technology: This engine uses MEUI (Mechanical Electronic Unit Injector) technology with Caterpillar’s ACERT system. The ADEM A4 Electronic Control Unit manages injection timing and fuel delivery. This improves fuel economy, lowers emissions, and provides smoother operation across varying load conditions.
Twin Turbocharger Design: Higher power ratings of the C18 use a series twin-turbocharged configuration. This design delivers strong power density and maintains good performance at high altitudes. It provides consistent power output in challenging operating conditions.
Fully Rebuilt to OEM Standards: We completely disassemble each engine and rebuild it to original Caterpillar factory specifications. We recondition the cylinder head and inspect the cylinder block. We service the fuel injection system and turbochargers. All critical wear parts are replaced with new components.
Tested Before Shipping: Every unit is dyno tested to verify power output, torque, compression, and cooling performance. A test report is available upon request. Machine work reports and dyno reports are also available.
Ready to Install: This used engine for sale ships as a complete long‑block assembly with pre‑installed filters and fluids. Necessary mounting hardware and wiring harness are included for straightforward installation.

Why Buy From Us

12‑Month Warranty: Coverage for parts and workmanship on all rebuild components
Worldwide Shipping: Secure export packaging and freight coordination available
Compatibility Support: Free fitment check with your machine model and serial number
Core Exchange Available: Ask about returning your old engine core to save on cost
Documentation Provided: Full rebuild reports and dyno test results upon request