An “excellent condition” Mitsubishi 4D56 engine is a robust, 2.5-liter inline-four turbocharged diesel engine known for its durability, reliability, and fuel efficiency, capable of exceeding 300,000 kilometers with proper maintenance. It has a simple mechanical design for easier and more cost-effective repairs, making it a popular choice for commercial vehicles, pickups, SUVs, and off-road applications.
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Durable and Reliable:
The 4D56 is celebrated for its long lifespan and ability to withstand heavy-duty use with proper upkeep.
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High Torque:
Its design provides excellent low-end torque, which is ideal for towing and navigating rough terrain.
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Fuel Efficient:
When maintained correctly, the 4D56 engine offers good fuel economy, especially when driven conservatively.
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Simple Design:
The mechanical simplicity of the engine makes it more accessible for maintenance and repairs, lowering costs for owners.
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Versatile:
The engine has been adapted through various versions to meet different power and performance needs for a range of vehicles and applications.
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Regular Maintenance:
Following the manufacturer’s recommended maintenance schedule, including regular oil and filter changes, is crucial for longevity.
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Proper Components:
Ensuring that high-quality diesel oil, filters, and coolant are used helps protect the engine from premature wear and failure.
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Functional Systems:
The engine’s electronic control systems, EGR valve, and catalytic converter should be in good working order to maintain performance and meet emission standards.
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Low Mileage:While known for durability, an engine with lower mileage, even with proper maintenance, will be in better overall condition.
- Engine Type: Four-cylinder, water-cooled diesel
- Displacement: 2.5L (2477 cc) or 2.8L (2835 cc)
- Valvetrain: Typically two valves per cylinder (8v) or 16 valves (16v DOHC)
- Bore & Stroke: Varies, with common examples being 86 mm x 94 mm (for 2.5L) or 92 mm x 92 mm or 92 mm x 100 mm (for 2.8L)
- Compression Ratio: 21:1 to 23.5:1
- Fuel System: Direct injection, with later models featuring common rail systems
- Power Output: Ranges from approximately 56 kW (75 hp) to 74 kW (100 hp)
- Torque Output: Ranges from roughly 160 Nm to 230 Nm
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Durability:Known for robustness and longevity, making it a reliable workhorse for off-road vehicles and commercial applications.
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Low-end Torque:Designed to provide robust pulling power, especially for hauling and towing.
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Fuel Efficiency:Offers a good balance of performance and fuel economy, especially in the 2.5L variants.
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Turbocharging (4D56T):A turbocharged version of the engine is available, significantly increasing power and torque for enhanced performance.
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Maintenance:Requires regular maintenance, including checking and changing the engine oil and filter, inspecting and maintaining the cooling system, and replacing fuel filters.
- Low operating hours or recent rebuild: Minimizing wear and tear.
- Good compression: Indicating healthy cylinder sealing.
- Clean fuel injectors and no fuel leaks: Ensuring efficient combustion and preventing fuel loss.
- No oil or coolant leaks: With all seals and gaskets intact.
- A properly functioning turbocharger (if applicable): Spooling up quickly and delivering boost without excessive noise.
- Clean and functional cooling system: Preventing overheating.
- Clean engine bay and no excessive carbon buildup: Signs of careful maintenance and proper operation.
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