Cummins 6.7 L Rebuilt Engine Replacement Options
The Cummins 6.7 L is the younger brother of the famed 5.9 L diesel engine. It’s equally as impressive as the older 5.9 L 6B/ISB but offers greater horsepower and torque output for both industrial and automotive applications. The Cummins 6.7 L was popular in Dodge Ram 2500 and 3500 Model Trucks from 2007-2016. Additionally, the 6.7 L was common in medium duty vocational trucks, transit busses, box trucks, RVs and emergency vehicles from 2007-2019.
For the Cummins 6.7 L engine we offer multiple generations of rebuilt replacement long blocks as well as extended long block drop-in engine solutions (ISB – Automotive, QSB – Industrial)
All remanufactured engine solutions are built to your specific engine serial number and CPL (Critical Parts List) This ensures a ‘like for like’ match and a seamless replacement solution. Our extended long blocks are all run tested prior to shipping. NOTE: Parts Included may vary depending on your ESN, our sales team will work with you to determine the solution we can offer. It’s better to get the right fit instead of trying to ‘shoehorn’ an engine solution that may not work for your application.
Rebuilt/Remanufactured Component Build Solutions:
Our component build remanufactured units contain mostly new parts and is the closest you can get to a new replacement engine assembly. These are (QSB – Industrial) rear gear train assemblies mostly applicable for industrial replacement commonly found with Case, Komatsu and Hyundai Excavator, Loader and Scraper Equipment. The assemblies do contain a limited number of reman/rebuilt parts but these are mostly non-wear components. Each build cycle we do is different depending on parts availability and model year generation.
There are many different engine configurations for numerous applications. We do stock common configurations in terms of Gear Housing, Turbo Location, Fan Arrangement, Oil Pan and Flywheel & Flywheel Housing but we also work with you to provide a custom solution for your particular piece of equipment. One size definitely doesn’t fit all!
Cummins QSB 6.7 L Long Block Diesel Engine
Big Bear Long Block Assemblies Include:
- Cylinder Block

- Cylinder Head
- Crankshaft
- Camshaft
- Followers and Lifters
- Pistons and Liners
- Piston Rings
- Gaskets
- Bearings
- Plugs and Bolts
- Push rods
- Connecting Rods
- Front Cover
- Timed Front Gear Train Group
- Intermediate Cover
- Oil Pump
- Oil Cooler
Freeze Plugs and Block Plugs- Front Rear and Main Seal
- Valve Cover
- Oil Pickup Tube
- Oil Pan
- Long Block is (3/4 Engine)
- Common Generations: CM850, CM2250, CM2350
- Can supply EGR, VGT (Turbo) as additional add-ons
Fully Rebuilt/Remanufactured Cummins ISB 6.7 L
Our fully remanufactured options include both long blocks and extended long block engine options. Unlike the reman component builds (above) fully reman/rebuilt units contain more remanufactured internal components such as the internal wear parts such as the block, head, camshaft, crankshaft etc... Pistons and Kits Used to rebuild the engines are all new parts.
Cummins ISB 6.7 L Long Block Diesel Engine (Dodge Ram Replacement)
Big Bear ISB 6.7 L Long Block Assemblies Include:
Cylinder Block- Cylinder Head
- Crankshaft
- Camshaft
- Connecting Rods
- Pistons and Liners
- Piston Rings
- Followers/Lifters
- Pushrods
- Rocker Assemblies
- Push rods
- Rear Plate
- Intermediate Cover
- Timed Front Gear Group
- Intermediate Cover
Fuel Pump Gear- Water Pump
- Oil Pump
- Oil Cooler
- Oil Filter
- Intake and Breather Cover
- Gasket Set
- Water pump
- Thermostat
- Vibration Damper
- Oil Pan and Pickup Tube
- Long Block is (3/4 Engine)
Cummins ISB 6.7 L Extended Long Block Diesel Engine (Dodge Ram Replacement)
Big Bear ISB 6.7 L Long Block Assemblies Include:
- Cylinder Block
- Cylinder Head
- Crankshaft
- Camshaft
- Connecting Rods
- Pistons, Liners, Rings
- Followers/Lifters
- Pushrods
- Rocker Assemblies
- Push rods
- Rear Plate
- Intermediate Cover
- Timed Front Gear Group
- Intermediate Cover
Water Pump- Fuel Pump and Fuel Lines
- Fuel Pump Gear
- Injectors
- Intake and Exhaust Manifolds
- Intake Manifold Heater Grid
- Variable Geometry Turbo
- Oil Pump
- Oil Cooler
- Oil Filter
- Intake and Breather Cover
- Gasket Set
- Valve Cover
- EGR Cooler and Piping
- Vibration Damper
- Oil pan and Pickup Tube
- Can Supply Flywheel/Flywheel Housing For Additional Add-On
Cummins ISB 6.7 L Specs | Engine Data |
| Configuration | Inline-six Cylinder, Four-Stroke |
| Displacement | 408 ci, 6.7L |
| Bore x Stroke | 4.21 inches x 4.88 inches |
| Cylinder Head Material | Cast Iron |
| Engine Block Material | Cast Iron |
| Firing Order | 1-5-3-6-2-4 |
| Compression Ratio | 17.3:1, 16.2:1, 19.0:1 (Varies by Year) |
| Aspiration | Turbocharged, Aftercooled |
| Valvetrain | OHV, 4 valves per cylinder, solid lifter camshaft |
| Weight | Approximately 1,070 lbs, 855 lbs Long Block |
| Oil Capacity | 12 Quarts (2007-2018) |
| Governor Speed | 2,800 rpm |
| Horsepower | 350 hp to 380 hp @2800 RPM |
| Torque | 3600 lb-ft to 900 lb-ft @1500 RPM |
| Engine Dimensions | 49.76 inch (L) x 35.85 inches (W) x 33.74 inches (H) |
Give us a call today at 844-340-4114 for immediate sales and support for the Cummins 4BT, Cummins 6BT, 6CT, ISC, 855, QSB 4.5 L 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!


















