Cummins 3.9L/4B Diesel Engine
Original price was: $5,973.00.$5,688.00Current price is: $5,688.00.
Find versatile Cummins 3.9L/4B Diesel Engines in Long Block, Drop-In, Short Block, or Long Block Premium configurations. Ideal for step vans, commercial delivery vehicles, industrial, and construction applications, all proudly assembled in the USA with rigorous testing.
Description
Equip your fleet or machinery with a reliable and powerful Cummins 3.9L/4B Diesel Engine. We offer a comprehensive range of configurations to suit your specific needs, including Long Block, Short Block, Long Block Premium, and Complete Drop-In options.
The 3.9L/4B Cummins is a highly popular engine, renowned for its durability and efficiency in various demanding applications. It’s an excellent choice for:
- Step van applications: including bread, snack, uniform, and other commercial delivery vehicles.
- Various industrial and construction applications.
Our factory employs advanced manufacturing and quality control processes to ensure every engine delivers lasting performance:
- Precision Machining: We utilize torque plating methods for boring and honing to guarantee block straightness, which significantly reduces break-in time and crankcase pressure.
- OEM-Grade Components: We use OEM or equivalent pistons, rings, bearings, valves, and gaskets, ensuring every component meets the highest standards of quality and durability.
- State-of-the-Art Assembly: Every engine is machined using state-of-the-art equipment and assembled using precise and repeatable methods. All engine production follows documented lean manufacturing processes and principles to create consistent quality and dependable outcomes.
Rigorous Testing for Unmatched Reliability:
- Short Block, Long Block, and Long Block Supreme configurations are 100% SIM tested before shipment.
- Our Complete Drop-In engines are 100% dyno tested before shipment. Computer controls ensure that each engine dyno test is conducted under standard, repeatable settings. Every engine undergoes:
- A warm-up cycle
- Three separate cruise segments simulating light, medium, and heavy throttle conditions
- Maximum torque and horsepower tests
- Both high and low idle tests
- A black light leak detection test with dyed oil, coolant, and fuel
All our engines are proudly assembled in the USA, reflecting our unwavering commitment to superior craftsmanship and exceptional quality.
Get A Quote On This Engine
Questions?
Our experts are ready to help call us at (888) 655-4615
Additional information
| Long Block | Block, Cam Gears, Camshaft, Crank Gear, Crankshaft, Front Gear Housing, Gasket Set, Head, Oil Cooler, Oil Filter Assembly, Oil Pump, Piston Assemblies, Rear Covers & Seal, Rods, Side Cover/Crankcase Breather, Valve Cover(s), Valve Train (lifters, pushrods, & rocker arms), Water Pump |
|---|---|
| Complete Drop-In | *All Parts On The Long Block Supreme Plus, Air Crossover Tube If Required, Damper Pulley, Exhaust Manifolds, Fuel Filter Assembly, Gear Cover & Seal, Injection Pump, Injectors, Intake Cover & Connection, Lift Pump, Low & High Pressure Lines, Oil Pan, Oil Pickup Tube, Thermostat, Thermostat Housing, Turbocharger (If Applicable) |
- All engines are assembled in the USA.
- Replaces 100% of rings, bearings, bushings, gaskets, and seals.
- Matched OEM requirements for piston type depending upon HP and application.
- All heads get new valves and are vacuum tested to ensure the quality of the valve job. All heads are pressure tested and upgraded to the latest style valve seal.
- Cylinder head seats replaced 100% new.
- Camshaft is checked for size, reground, if necessary, and micropolished to OEM specifications.
- All connecting rods are demagnetized.
- Core plugs are 100% stainless steel to avoid corrosion.
- Blocks, heads and crankshafts are 100% magnaflux tested to avoid cracked components.
- Connecting rods have new bushings installed and both large and small end are remachined to OEM specifications.
Crankshaft is checked for size, reground, if necessary, and micropolished to OEM specifications.
ENGINE TESTING
Every engine is machined using state-of-the-art equipment and assembled using precise and repeatable methods. All engine production follows documented lean manufacturing processes and principles to create consistent quality and dependable outcomes.
All Short Block, Long Block, and Long Block Premium are 100% Sim tested before shipment.
Complete Drop-In engines are 100% dyno tested before shipment. Computer controls ensure that each engine dyno test is conducted under standard, repeatable settings. Every engine is run through a warm-up cycle; three separate cruise segments simulating light, medium, and heavy throttle conditions; maximum torque and horsepower tests; both high and low idle tests; and a black light leak detection test with dyed oil, coolant, and fuel.
we’ve been delivering remanufactured engines for skid steer loaders for over 30 years—longer than any competitor in the industry. Our veteran machinists, many with decades of experience, follow engine-specific rebuild procedures to ensure consistent quality with every unit.
Each engine is carefully rebuilt to meet or exceed OEM specifications, using top-tier components and proven techniques. This is more than just a repair—it’s a full remanufacturing process designed to restore the engine to like-new condition.
Before shipping, every complete skid steer engine is dyno-tested for performance and reliability, so you can install with confidence.
Nationwide Warranty
On-Road Complete Drop-In configurations: 2 year/unlimited mileage, 2nd-year long block coverage only.
Long Block configurations: 1 year/unlimited mileage.
Off-Road All configurations: 1 year/2,000 hours.
