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The 6.7L Cummins has powered a lot of hard-working Dodge Ram and Ram trucks. From 2007.5 through 2018, these engines were used in trucks that towed trailers, hauled equipment, worked on farms, pulled campers, and handled daily driving. For a lot of owners, the truck is still worth keeping even when the engine is not.
But when your original engine is hurt, the big question becomes this:
Is it worth putting a replacement 6.7 Cummins long block back in your Dodge Ram or Ram truck?
In many cases, yes. If the truck is clean, paid for, already upgraded, or set up exactly how you want it, a quality 6.7 Cummins long block can be a smart way to keep the truck on the road without starting over with a newer truck payment or gambling on a used engine.
And if you are looking for a serious replacement option, the Fleece Freedom Series 6.7L Cummins long block is one of the best choices available.
Before we go any further, let’s make one thing clear.
This article is about the 6.7 Cummins engine used in Dodge Ram and Ram trucks. It is not about the 6.7 Powerstroke used in Ford Super Duty trucks.
That matters because both engines are commonly searched as “6.7 diesel engine replacement,” but they are completely different platforms. The Fleece Freedom Series engines we are talking about here are for 6.7L Cummins-powered Dodge Ram and Ram trucks, including 2007.5–2018 applications.
If you drive a Ram 2500 or Ram 3500 with a 6.7 Cummins and you are looking for a replacement engine, you are in the right place.
A lot of 6.7 Cummins trucks are still too useful to give up on.
Maybe the truck is paid off. Maybe the transmission has already been built. Maybe it has the suspension, wheels, tires, flatbed, fuel system, or towing setup you want. Maybe it has been a reliable work truck for years and replacing the whole truck simply does not make sense.
That is where a 6.7 Cummins engine replacement becomes a serious option.
For many owners, putting a replacement long block back in the truck is a better move than buying a used truck with its own unknown problems. Newer trucks are expensive, and used diesel trucks are not exactly cheap either. If the rest of your Ram is solid, the engine may be the part that makes the most sense to replace.
An engine replacement is not just about fixing a failure. It can be a way to extend the life of a truck you already know.
The 6.7 Cummins is a strong engine, but it is not immune to damage. High mileage, heavy towing, overheating, poor maintenance, fuel system issues, tuning problems, and previous repairs can all lead to major engine failure.
Common reasons owners start looking for a 6.7 Cummins replacement engine include:
Sometimes the truck still runs, but it is clearly hurt. Other times, the engine failure is sudden and obvious.
Once the repair goes beyond a simple top-end or bolt-on fix, a 6.7L Cummins long block becomes worth considering.
A used 6.7 Cummins engine may look attractive because of the lower upfront price. But the real question is not just what the engine costs. It is what the whole job costs if that used engine turns out to be bad.
A used engine can come with a lot of unknowns. You may not know the true mileage, maintenance history, overheating history, tuning history, or whether the engine had injector, turbo, or fuel system problems before it was pulled.
That is a big risk when labor is involved. Installing an engine is not a small job. If the used engine fails after install, you are not just out the cost of the engine. You may be paying for the labor again.
That is why a quality 6.7 Cummins long block can be the better long-term choice. It gives your truck a fresh foundation instead of another engine with another unknown past.
Before ordering a replacement engine, it is important to know which version of the 6.7 Cummins you have.
The 6.7L Cummins replacement engine applications are commonly split into two major groups:
2007.5–2012 6.7 Cummins These early 6.7L Cummins trucks have their own specific long block application.
2013–2018 6.7 Cummins These later Ram 2500 and Ram 3500 trucks require a different matching long block application.
Fleece offers Freedom Series 6.7L Cummins long block options for both 2007.5–2012 and 2013–2018 trucks, including Street Series and Street HD Series versions.
That matters because fitment is not something you want to guess on. Before buying any 6.7 Cummins engine replacement, verify the model year, application range, and part number.
When people search for a 6.7 Cummins engine replacement, they usually are not just shopping for fun. They have a truck down, a major repair decision to make, and a need to get back on the road.
A long block helps solve that problem by replacing the major internal engine assembly while allowing you to reuse many of the external components, assuming those parts are still in good shape.
A quality long block makes the most sense when the core engine is damaged. If the bottom end is hurt, the cylinder walls are damaged, the engine was overheated, or coolant and oil have mixed, replacing one piece at a time may not be the best move.
A long block gives your Ram a fresh engine foundation.
The Fleece Freedom Series 6.7L Cummins long block is built for owners who want a better replacement option than a questionable used engine or a basic reman.
The Fleece Street Series long block includes a Freedom Series Street cylinder head, reconditioned block, genuine Cummins rods, new pistons and rings, new bearings, new tappets, a new oil pump, new oil cooler, new engine oil pan, new seals, lower gasket kits, Custom Age 625 head studs, and a case of AMSOIL break-in oil with a Fleetguard filter.
That is a big deal during installation. Engine jobs get frustrating when small but important items are missing. Fleece includes several of the pieces needed to help make the install more complete from the start.
For someone searching broadly for a 6.7 Cummins replacement engine, this is where the Fleece program starts to stand out. It is not just a long block in a crate. It is a more complete replacement solution.
Fleece offers both Street Series and Street HD Series 6.7L Cummins long blocks.
The Street Series is a strong choice for a daily driver, tow rig, or work truck that needs a quality replacement engine.
The Street HD Series adds several upgrades for owners who need more strength, including a Street HD cylinder head, aftermarket heavy-duty connecting rods, upgraded 12mm main studs, a Hamilton 178/208 camshaft, H Series main and rod bearings, and a Fluidampr with a full power kit and dowel installed in the crank snout.
For a mostly stock or mild truck, the Street Series may be the right fit. For a truck that tows heavy, works hard, or has performance upgrades, the Fleece Street HD 6.7L Cummins long block may be worth the upgrade.
One of the biggest reasons to consider the Fleece Freedom Series 6.7L Cummins long block is that the engines are final tested after assembly.
Fleece states that all long blocks are run on a fully automated engine test stand after assembly. Their testing includes vacuum testing the coolant system, pre-lubing and verifying oil flow, measuring crankshaft loads, run-in testing to verify oil pressure and flow, and compression testing on all cylinders.
When you are spending the money to put a replacement engine back in a Ram 2500 or Ram 3500, that testing matters. You want more confidence before the engine ever gets to your shop.
Most people do not start by searching for Fleece. They start by searching for the problem.
They search things like:
That is exactly why the Fleece option makes sense. It answers the real problem behind those searches.
You need the correct Cummins application. You need an engine you can trust. You need a package that helps simplify the install. You need a long block that makes sense for a truck you plan to keep.
The Fleece Freedom Series long block checks those boxes. You get a purpose-built replacement engine with important upgrades, included break-in oil, included gaskets, final testing, and Street or Street HD options depending on how the truck is used.
A replacement long block is only part of the job. Before installing any 6.7 Cummins long block, it is important to inspect the parts that will be reused.
A new long block can be damaged quickly if the original failure was caused by a bad external component.
During the install, consider inspecting or replacing:
Fuel system health is especially important on a common rail Cummins. A bad injector can damage a replacement engine quickly. If the original engine failure was related to fueling, do not install a new long block without fixing the root cause.
The same goes for cooling system problems. If the old engine overheated, check the radiator, fan clutch, thermostat, water pump, hoses, and related components before putting the replacement engine into service.
If the truck is rusty, neglected, or has major issues beyond the engine, a long block may not make sense.
But if the truck is clean, useful, paid off, or already built the way you want it, then yes, putting a replacement 6.7 Cummins long block back in your Dodge Ram or Ram truck can absolutely be worth it.
The 6.7L Cummins is still one of the most trusted diesel pickup engines on the road. If the rest of the truck is worth saving, the engine is worth doing right.
A quality long block can help you avoid the risk of a used engine, extend the life of the truck, and give you a better foundation for daily driving, towing, work, or performance use.
If your 2007.5–2018 Dodge Ram or Ram 6.7 Cummins needs an engine replacement, the Fleece Freedom Series long block program is one of the best options available.
Whether you need a Street Series replacement for a reliable daily driver or a Street HD Series engine for towing, work, or performance use, Fleece offers a serious solution for keeping your 6.7 Cummins Ram on the road.
Shop Fleece 6.7 Cummins Long Block Engines
Have questions about which Fleece 6.7 Cummins long block fits your truck? Give Thoroughbred Diesel a call. We can help you choose the right engine, understand the core process, and make sure you have the supporting parts needed for a successful install.