Cummins ISB 5.9 Engines For Sale

Shop the 5.9 Cummins engine for sale at HD Engines. The Cummins ISB 5.9 is a 5.9-liter (5,883 cc / 359 cu-in) inline six-cylinder, four-stroke, water-cooled, turbocharged diesel engine. Manufactured by Cummins from 1998 through 2007, the ISB 5.9 is known for its durability and widespread use across commercial, industrial, and light-truck applications. Every 5.9 Cummins engine we stock is run-tested and listed with its year, horsepower, and configuration so you can match the right engine to your vehicle.

The ISB 5.9L engine features a cast-iron engine block with 102.0 mm (4.02 in) cylinder bores and a 120.0 mm (4.72 in) piston stroke. It operates with a 17.2:1 compression ratio and uses a cast-iron cylinder head with a single overhead valve (OHV) camshaft design and four valves per cylinder, supporting efficient combustion and reliable performance.

Below is a brief overview of the 5.9 Cummins engine and what makes it a lasting favorite:

Power and Performance: The ISB 5.9 produces roughly 175 to 325 horsepower and up to 610 lb-ft of torque, depending on the year and rating, giving it strong pulling power for its size.

Fuel System: Early ISB 5.9 engines used a Bosch VP44 rotary injection pump, while later 24-valve versions moved to high-pressure common rail injection for cleaner combustion and better response.

Applications: The 5.9 Cummins powers medium-duty trucks, delivery vehicles, buses, RVs and motorhomes, and a wide range of industrial and vocational equipment.

Durability: The cast-iron block and cylinder head give the ISB 5.9 a reputation for high-mileage durability, and its straightforward design makes it easy to service and rebuild.

Parts and Support: As one of the most popular diesel engines ever built, the 5.9 Cummins enjoys excellent parts availability, keeping repair and ownership costs low.

Why Buy a 5.9 Cummins Engine From HD Engines?

Owners choose the ISB 5.9 for its legendary durability, simple design, and low operating costs. At HD Engines, every 5.9 Cummins engine is run-tested and inspected before it ships, and listed with its serial number, horsepower, and configuration. With 25-plus years in the diesel engine business and nationwide freight, buying a 5.9 Cummins engine is straightforward and low-risk.

Cummins ISB 5.9 Engines We Carry:

Our inventory includes new and run-tested ISB 5.9 engines, such as a new 2006 ISB 5.9 rated at 235HP with a competitive price. Whether you need a replacement for a medium-duty truck, an RV, or industrial equipment, we can help you find the right 5.9 Cummins engine for your application. Contact us today and we will match your engine by serial number or application. Call (786) 377-5210 or email info@hdengines.com.

Overall, the 5.9 Cummins engine has earned a lasting reputation for reliability, durability, and low operating costs, making it a trusted choice for medium-duty truck, RV, and industrial applications.