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6BT Cummins (5.9L) Engines and Long Blocks

Replacement Cummins 6BT Engines For Sale

Big Bear Engine Company Warranty SealThe 6BT Cummins Engine, more commonly known as the 5.9L Cummins Long Block Engine, is one of the most popular light to medium-duty truck engines ever made. The 6BT engine was first manufactured in 1988 and was launched with the 1989 Dodge Ram. Chrysler introduced its Ram pickup trucks in 1981 but faced stiff competition from GM and Ford. Their original Chrysler LA and later Magnum engines simply weren’t cutting it. They needed a heavy-duty engine that could compete and the 6BT Cummins outperformed its rivals in virtually every meaningful category.

In 1985, Chrysler signed the deal of a lifetime with Cummins, and the engine manufacturer even helped the automaker integrate the 6BT into its trucks. In time, the Dodge Ram ended up being one of the most successful trucks of all time, and much of that was due to the performance and reliability of the Cummins 5.9, 6BT. The Cummins 5.9 / Cummins 6BT is one of the highest-produced 6-liter or smaller engines of all time on record, and it is still manufactured in 6 different countries today. The simple, mechanical 12-valve design has made the 6BT / 5.9L Cummins one of the most reliable diesel engines ever produced.

Cummins 5.9 Horsepower History ChartThe 6BT Cummins Engine (5.9 L) is used both in light-duty trucks as well as numerous industrial applications. Popular industrial applications include: Step Vans, Delivery Trucks, School Busses, Small Dump Trucks, Generators, Motor Homes, Utility Trucks, Backhoes, Loaders, Dozers, Motor Graders, Forklifts, Man Lifts, Water Pumps, Irrigation Pumps, Drainage Pumps, and Marine Applications.

Cummins 6BT Long Block Engines:

Cummins 6BT Surplus EngineOur 6BT long block engines are an excellent choice for the customer with an existing Cummins 5.9L / 6BT Cummins engine that is in need of an overhaul but that can’t be repaired. Usually, if the engine threw a rod through the block, piston damaged the head, dropped a valve or spun a bearing it is more cost-effective to replace the engine.

The good news is that the ancillary parts of the engine such as the water pump, oil pump, turbo, injectors, flywheel, flywheel housing, starter, fuel lines, oil cooler, intercooler, oil filter, oil filter adapter, intake and exhaust manifolds, clutch and all of your brackets and pulleys can easily be swapped over to complete your Cummins long block engine. It is more cost-effective to retain perfectly good parts and replace the internal parts of the engine. Our long blocks feature fresh castings, not used or remanufactured, and are completely new. They are built with ISO 9001 new parts and are built to exact OEM tolerances and clearances. In accordance with rebuilding/remanufacturing guidelines component builds do contain some reman parts depending on the build cycle which usually limited to aftercoolers, shut-off valves, rocker assemblies, pumps or sheet metal.

Our Long Block 6BT Cummins Engines Include:

AERA Association Member
• Block (We Offer STORM and NON-STORM Blocks)
• Cylinder Head
• Camshaft and Lifters
• Crankshaft
• Connecting Rods
• Rocker Assemblies
• Gaskets, Rings, Seals, Bearings
• Timed Front Gear Group
• Valve Cover
• Oil Pump (most standard long block models)
• Oil Pan and Pickup Tube
• Standard 12 Month Parts Replacement Warranty
• 1 and 2 Year Extended Parts/Labor Warranties also Available

Long Block Models Include:

• 6B
• 6B Marine
• 6B Marine (Nippondenso Alternator)
6C - 2 Thermostat
6C - 1 Thermostat
ISB 5.9 L 24 Valve Long Block Program
• ISB 6.7 L

Cummins 6BT Extended Long Block Engines:

Our component build 6BT Cummins engines are also known as extended long blocks and essentially come with everything you need to replace your existing 6BT (5.9 L) assembly. Like our long blocks, our Cummins 6BT Engine / 5.9 L engines are built with all new ISO 9001 parts, to exact Cummins OEM specs (and that enjoy less than 1% failure rate on new parts). As a general guide, a component built engine is around 75% complete, and consists of roughly 90% OEM parts and 10% aftermarket parts. All of our 6BT Cummins Engines are built to industrial and automotive specs. Our extended long blocks do not come with a starter, alternator, flywheel, flywheel housing, air cross over tubes, motor mounts, hydroboost, or a radiator. Our extended 5.9 Cummins long block engines come with:

• Block
• Cylinder Head
• Camshaft and Lifters
• Crankshaft
• Connecting Rods
• Rocker Assemblies
• Gaskets, Rings, Seals, Wrist Pins, Bearings
• Injectors
• Oil Pump and Water Pump
• Oil Cooler
• Oil Filters
• Inline Mechanical Fuel Pump
• HX30 or HX35 Wastegate Turbocharger
• Valve Cover
• Timed Front Gear Group
• Aftercooler or Charge Air Cooler (Depends on Configuration)
• Intake and Exhaust Manifolds
• Oil Pan and Pickup Tube
• PTOs, Clutches, Radiators, Skids, Fuel Tanks Available but not included
• Standard 12 Months Parts Replacement Warranty
• 1 and 2 Year Extended Parts/Labor Warranties also Available

6BT Extended Long Block Engine Models:

• 6B - 155 hp
• 6B - 160 hp
• 6B - 180 hp
• 6B - 210 hp
• 6B - 230 hp

• 6C - 215 hp

• 6C - 240 hp- 2 Thermostat
• 6C - 240 hp- 1 Thermostat

• 6C - 260 hp- 2 Thermostat
• 6C - 260 hp- 1 Thermostat

• 6C - 300 hp- 2 Thermostat
• 6C - 300 hp- 1 Thermostat

Cummins 6BT Specs

Engine Data

TypeInline-six, four-stroke
Displacement5.9L (359 ci)
Bore4.02 in
Stroke4.72 in
Compression Ratio17.5:1
Max Horsepower215 hp @ 2,500 rpm
Max Torque440 lb-ft @ 1,600 rpm
Valve TrainOHV (2 Valves Per Cylinder)
Cylinders6 (I-6)
Cylinder Head MaterialCast Iron
Engine Block MaterialCast Iron
Camshaft DriveGear Driven
CrankshaftForged Steel (7 Main Bearings
Fuel SystemBosch
Fuel InjectionHigh Pressure, Mechanical Direct Injection
Emission AbatementNone
TurboHolset (Fixed Geometry)
Oil SystemWet Sump
Oil System CapacityCell
Cooling System3 Gallons
Cooling SystemWater-cooled
Control SystemMechanical
Dry Weight1,100 lbs


Give us a call today at 844-340-4114 for immediate sales and support for the Cummins 4BT engine, 5.9 Cummins long block, 6BT Cummins, or CAT 3306. If you have any questions, check out our FAQ Page. We are always ready to help or just listen to your crazy off-roading adventures!

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Cummins 6BT (5.9) Engines Gallery

6BT 210 HP 1 m
6BT 210 HP 2 m
6BT 210 HP 3 m
6BT 210 HP 5 m
6BT 210 HP 6 m
6BT 210 HP Engine Close UP m
6BT Engine and Parts
6BT Extended Long Block
6CT 260HP
6CT 300HP
Cummins 6BT Complete Engine
Cummins 6CT 240HP

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