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    • 5.9 L 24V CUMMINS LONG BLOCKS 2003–2007

    5.9 Cummins Long Block Engines for Sale 2003-2007 Dodge Ram 2500 & 3500

    Shop 5.9 Cummins long block engines for sale for 2003-2007 Dodge Ram 2500 and 3500 trucks. These engines are a direct replacement for trucks equipped with the 5.9L Cummins diesel and are built for reliability, towing, daily driving, and performance applications.

    The 2003-2007 model years use the common rail 5.9 Cummins engine, making them one of the most popular platforms for both stock replacement and high-performance diesel builds.

    CPP Diesel offers multiple 5.9 Cummins engine for sale options, including stock replacement and performance long block builds designed to handle real-world diesel use.

    Each remanufactured 5.9 Cummins long block is built to handle daily driving, heavy towing, work truck use, and performance builds.

    Race-Proven Diesel Engine Experience

    With over 16 years of diesel engine building experience, CPP Diesel has built everything from daily drivers and tow rigs to competitive race engines and 3.0 class sled pulling trucks.

    Our experience in diesel racing and sled pulling allows us to build 5.9 Cummins long blocks that hold up under demanding conditions while maintaining reliability for street, towing, and work truck use.

    Built for Stock Replacement, Towing, and High Performance

    The 2003-2007 5.9 Cummins is one of the most popular diesel engines ever built, known for durability, strong torque, and excellent performance potential. Some customers need a reliable reman 5.9 Cummins long block for a daily driven Ram, while others need a stronger foundation for upgraded fueling, turbochargers, tuning, towing, or higher horsepower goals.

    Whether you are replacing a failed engine or building a stronger common rail Cummins setup, CPP Diesel offers 5.9 Cummins engine replacement options built to handle real-world use.

    What Is a 5.9 Cummins Long Block?

    A 5.9 Cummins long block is the core engine assembly. It typically includes the engine block, crankshaft, connecting rods, pistons, camshaft, cylinder head, and valvetrain components. A long block does not usually include external accessories such as turbochargers, injectors, fuel systems, manifolds, sensors, wiring, or electronics.

    For many 2003-2007 Dodge Ram Cummins owners, replacing the engine with a long block is faster and more cost-effective than rebuilding a severely damaged engine from scratch. A properly built long block gives you a fresh foundation while allowing you to reuse or upgrade your external components.

    Fits 2003-2007 Dodge Ram 5.9 Cummins Trucks

    This category includes 5.9 Cummins long block engines for 2003-2007 Dodge Ram trucks, including Ram 2500 and Ram 3500 models equipped with the common rail 5.9L Cummins diesel engine.

    • 2003 Dodge Ram 2500 / 3500 5.9 Cummins
    • 2004 Dodge Ram 2500 / 3500 5.9 Cummins
    • 2005 Dodge Ram 2500 / 3500 5.9 Cummins
    • 2006 Dodge Ram 2500 / 3500 5.9 Cummins
    • 2007 Dodge Ram 2500 / 3500 5.9 Cummins

    Common Reasons to Replace a 5.9 Cummins Engine

    The 5.9 Cummins is known for reliability, but high mileage, injector failure, tuning, heavy towing, poor maintenance, or overheating can lead to major engine damage. Common reasons customers search for a rebuilt 5.9 Cummins engine include:

    • Excessive blow-by
    • Low compression
    • Piston damage
    • Cylinder wall wear
    • Injector failure damage
    • Head gasket failure
    • Overheating damage
    • Turbo-related engine damage
    • Bottom-end failure

    When Should You Replace Your 5.9 Cummins Engine?

    If your engine has excessive blow-by, low compression, internal damage, injector-related failure, or catastrophic engine failure, replacing it with a 5.9 Cummins long block is often the most reliable and cost-effective solution. Many Ram 2500 and Ram 3500 owners choose a long block when repair costs exceed the value of rebuilding their existing engine.

    Stock 5.9 Cummins Long Blocks vs Performance Builds

    CPP Diesel supports both stock replacement customers and performance diesel customers. A stock-style long block is a smart choice for daily drivers, work trucks, and towing applications where reliability is the main goal. A performance long block is better suited for trucks running upgraded fuel, larger turbochargers, aggressive tuning, or higher horsepower goals.

    Engine TypeBest ForMain Benefit
    Stock Replacement Long Block Daily driving, work trucks, towing Reliable replacement for a failed engine
    Performance Long Block Higher horsepower street and tow builds Stronger foundation for added power
    Race / Competition Engine Drag racing, sled pulling, extreme builds Built for severe use and competition demands

    Supporting Parts to Consider With a 5.9 Cummins Long Block

    When replacing your 5.9 Cummins engine, it is important to inspect the supporting components. Reusing damaged injectors, turbochargers, fuel system parts, or cooling system components can shorten the life of a fresh long block.

    If you are looking for newer engine options, check out our 6.7 Cummins long block engines.

    Why Buy Your 5.9 Cummins Long Block From CPP Diesel?

    • Over 16 years of diesel engine building experience
    • Built using real-world diesel performance and racing experience
    • Experience with stock, towing, street performance, race, and sled pulling engines
    • Knowledge gained from competitive diesel racing and pulling applications
    • Stock replacement and high-performance engine options available
    • Designed for towing, daily driving, work trucks, and high-performance use
    • Diesel-focused support from people who understand Cummins engines

    5.9 Cummins Long Block FAQ

    Is the 2003-2007 5.9 Cummins a common rail engine?

    Yes. The 2003-2007 5.9 Cummins uses a common rail fuel system, making it different from earlier 12-valve and 24-valve VP44 engines.


    What comes with a 5.9 Cummins long block?

    A 5.9 Cummins long block generally includes the assembled block, rotating assembly, camshaft, cylinder head, and valvetrain. External components such as the turbocharger, injectors, fuel system, manifolds, sensors, wiring, and electronics are usually not included unless stated on the product page.


    Is a 5.9 Cummins long block the same as a crate engine?

    Not always. A long block is the core engine assembly, while a crate engine may refer to a more complete engine package depending on the manufacturer or builder. Always review what is included before ordering.


    Do you offer stock and performance 5.9 Cummins engines?

    Yes. CPP Diesel supports customers looking for stock replacement engines as well as performance long blocks for higher horsepower street, towing, racing, and sled pulling applications.


    Should I replace injectors or turbochargers when installing a new long block?

    It is recommended to inspect or replace injectors, turbochargers, fuel system components, cooling system parts, and oiling system components before installing a new engine. A damaged injector or turbocharger can shorten the life of a fresh long block.


    What trucks does this 5.9 Cummins long block category cover?

    This category is intended for 2003-2007 Dodge Ram and Ram 2500/3500 trucks equipped with the 5.9L common rail Cummins diesel engine.


    Can CPP Diesel help with a high horsepower 5.9 Cummins build?

    Yes. CPP Diesel has experience with high-performance diesel builds, racing engines, and sled pulling applications. Contact us if you need help choosing the right engine foundation for your horsepower goal.

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