: The "Big Cam" evolution increased the camshaft diameter to 2.5 inches, shortening injection periods to create more torque at lower engine speeds and improving fuel efficiency.

: The engine features an alloy cast iron block and head, forged-steel internals, and large bearings designed for extreme durability.

: Because of its reliable mechanical nature, it is a staple for heavy-duty trucks, marine vessels, and industrial power generators. Technical Specifications Summary Displacement 14.0L (855 cubic inches) Configuration Inline 6-cylinder diesel Horsepower 250 – 475 HP (depending on configuration) Torque 1,000 – 1,650 lb-ft Oil Capacity Approx. 11 to 15 gallons (44–57L) NTA855-G4 - Cummins

: The cylinder liners are "wet," meaning they are in direct contact with coolant for better heat dissipation. This design allows for easier rebuilds because the liners can be replaced without needing to machine the engine block.

: Unlike modern engines, the NT855 lacks complex Electronic Control Modules (ECMs). This makes it significantly easier to diagnose and repair using standard mechanical tools, which is ideal for remote locations.

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Engine Nt855 Manual — Cummins

: The "Big Cam" evolution increased the camshaft diameter to 2.5 inches, shortening injection periods to create more torque at lower engine speeds and improving fuel efficiency.

: The engine features an alloy cast iron block and head, forged-steel internals, and large bearings designed for extreme durability. Cummins Engine Nt855 Manual

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Engine Nt855 Manual — Cummins

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