What Engines Can You Put in Dodge Ram 3500?

An engine swap on is probably one of the most complicated modifications you can pull off for Dodge Ram 3500. You can go for the engine with the best compatibility and moderate performance boost or go all in and swap a gas engine for a diesel one. The only thing that can limit your expectations is your own safety. Ram 3500 engine interchange is no simple feat that requires a lot of additional work, fitment, modifications and expertise.

The options available for a specific vehicle may be limited by factors such as compatibility, emissions regulations, and the availability of parts and support. Ultimately, the chosen engine should be suited to the vehicle's intended use and installed or modified by a qualified mechanic or technician.

The type of engine that can be put in a Dodge Ram 3500 depends on several factors. You can find all this information a comprehensive engine swap compatibility guide below.

Dodge Ram 3500 Engine Swap Compatibility Chart

Cummins / Inline-6 / B-Series - Diesel / ISB / 6.7L Turbo Diesel
Dodge Ram 2500, 2007, 2008, 2009, 2010, 2011
Dodge Ram 3500, 2007, 2008, 2009, 2010, 2011
RAM 2500, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022
RAM 3500 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022
Chrysler / V8 / HEMI - Petrol / Third Generation / 5.7L HEMI EZC
Dodge Challenger, 2009, 2010, 2011, 2012, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022
Dodge Ram 2500, 2003, 2004, 2005, 2006, 2007, 2008, 2009
Dodge Ram 3500, 2003, 2004, 2005, 2006, 2007, 2008, 2009
RAM 2500, 2012, 2013, 2014, 2015, 2016, 2017, 2018
RAM 3500 2012, 2013, 2014, 2015, 2016, 2017, 2018
Cummins / Inline-6 / B-Series - Diesel / ISB / 5.9L Turbo-Diesel
Dodge Ram 2500, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
Dodge Ram 3500 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
Chrysler / V8 / Chrysler LA engine - Petrol / Magnum / Magnum 8.0L
Dodge Ram 3500 1999, 2000, 2001, 2002, 2003
Chrysler / V8 / Chrysler LA engine - Petrol / Magnum / 5.9L Magnum V8
Dodge Dakota, 1999, 2000, 2001, 2002, 2003
Dodge Durango, 1999, 2000, 2001, 2002, 2003
Dodge Ram 1500, 1999, 2000, 2001, 2002, 2003
Dodge Ram 2500, 1999, 2000, 2001, 2002
Dodge Ram 3500 1999, 2000, 2001, 2002

To find information about your car's engine or another engine of a particular vehicle, you can consult our Dodge Ram 3500 engine interchange compatibility chart, which provides a comprehensive list of years and trim levels when the same engine was used. 

Additionally, we list other vehicles that have the same engine under the hood, making it easy to cross-reference and compare.

Are you uncertain about the engine in your vehicle? Our comprehensive guide can help identify its name and specs, allowing for educated decisions regarding maintenance or upgrades. With this knowledge, you will be able to take control of your car's future confidently.

What Kind of Engine Does my Ram 3500 Have?

Before you can find compatible engines in our swap chart, you need to learn what kind of engine your Ram 3500 has. Here you have a few options. Firstly, you can check the Vehicle Identification Number (VIN), which is often located in the owner's manual or under the hood. In many cases, it can also be found on the driver's side dashboard. The eighth character of the 17-digit VIN provides information about the engine, so by decoding it, you can determine the type of engine.

The VIN includes details about the country of manufacture, manufacturer, car type or division, brand, body style, engine size and type, model, assembly plant, and model year. If you want to decode the VIN, there are websites available that can do this for you. 

Just enter the 17 characters of your car's VIN into the website, and you'll receive a report with all the relevant information. This can be a quick and convenient way to learn about your car's history and specifications.

Alternatively, if you know the specific trim level of your Dodge Ram 3500, you can conduct an online search to identify the type of engine it has. This information can be helpful for maintenance or upgrades.

How Do I Know if an Engine Will Fit in my Ram 3500?

When selecting the ideal engine for your Dodge Ram 3500, it is important to be cognizant of automotive engineering principles and confirm that any chosen motor is compatible with your automobile. This will help you evade problems such as reduced performance or destruction caused by installing an incompatible power source. 

Before making a selection, factor in characteristics like size, fuel type, and strength output.

Lastly but most importantly, remember to get expert advice from a qualified mechanic or auto parts supplier before going ahead with anything.

Axles and Drivetrain

Connecting the drivetrain and gears during an engine swap requires intricate precision. If the engine is not from a specialist, custom shafts need to be made to ensure compatibility with the existing front-or rear-wheel drive system. 

These connections rely on the accuracy and any errors could have a large detrimental effect on the whole project. Ensuring these connections are done correctly is paramount for a successful and safe Ram 3500 engine swap.

Pedal Assembly

Ensuring compatibility between the gas and clutch pedals is essential when swapping an engine for Dodge Ram 3500 and its gearbox. For older engines with cable-operated throttle bodies, it may be as simple as a cable change. Electronic control systems require specific ECUs, pedal assemblies, and wiring to work correctly. Cable-operated mechanisms in cars with cable-operated gearboxes can usually be reused while swapping out the transmission. If a hydraulically controlled transmission is used, an adapter line connecting the clutch slave cylinder to the master cylinder may need to be made.

Installing hydraulically operated gearboxes in chassis featuring cable-driven transmissions can also be done with an adapter kit, the corresponding pedal assembly, and hydraulic components such as the clutch master cylinder and reservoir.


It is critical to evaluate the compatibility between the Ram 3500’s transmission and shifter. Each transmission has a different shift pattern which dictates how gears are shifted into place. 

Therefore, you must take into account all of the separate elements that make up the shifting mechanism such as links and handles made specifically for one type of transmission or another. It’s important to ensure these components match in order to guarantee smooth gear shifts.

This might necessitate changing either the shift pattern or shifting mechanisms altogether and swapping out for a different assembly made for your refreshed transmission. After this step is complete, confirm that all of your linkages are correctly adjusted in accordance with how they were intended to be aligned before test driving.

Fuel System

To interchange with a more potent engine, it is essential that you have higher caliber fuel lines and superior filtration. Driving with a faulty fuel pump can easily ruin your whole day. To avoid such complications, it is always recommended to use a factory-style in-tank pump while driving daily. 

Frame-mounted high-volume pumps are designed for more extreme conditions and should not be used for general driving as they often vibrate, run hot, and may cause failure or cabin noise if used over long periods of time.

Cooling System

As you replace the Ram 3500’s engine, it's critical to evaluate its cooling system compatibility. Mechanical fans may still be functional for older engines, however, modern ones generate much more heat and require an even better flow of air. Before installation starts, take into account all relevant details about the engine and choose a reliable electric fan - this will make sure that your car runs efficiently.

A/C and Power Steering

To simplify the installation process, modern motors’s designs often include designated areas for air conditioning compressors. However, these locations can be found in a lower portion of the engine which may make it complicated to mount properly between frame rails. To resolve this issue you may need to move your compressor elsewhere in order to get secure placement. It is also common for people to struggle with setting up their systems correctly and deciding where each component such as an accumulator/dryer or fixed orifice should go when building out their system.

Intake and Exhaust

The shape and size of intake piping needs to be adapted to fit the new engine on Dodge Ram 3500, while an adapter pipe may be needed for the exhaust manifold to match the existing exhaust system. Doing so will ensure that the engine runs optimally and safely, providing drivers with the best possible performance.


Ram 3500 enthusiasts often encounter wiring problems when working on engine interchange projects, regardless of the project's size, particularly in modern engine swaps. Wiring can be complicated and demands knowledge about circuits, amperage, wire gauges, and relays. For instance, the electric fan circuit is more complex than just running two wires for power and ground. It also requires integration with the cooling system and air conditioning system, as well as one or two relays to function properly.

Clearance Problems

Clearance issues are a common challenge in Dodge Ram 3500 engine swap projects, as the new engine may not fit the same way as the original one. This can be especially true when getting a larger engine, or an motor from a different vehicle. In some cases, modifications to the engine bay, subframe, or firewall may be required to ensure proper fitment. 

Suspension and Brakes

An engine swap can present a variety of suspension and brake challenges, most notably when upgrading Ram 3500 to a more powerful engine. The extra power and weight can significantly impact the handling and braking performance. To compensate for this, it is important to upgrade the suspension and brakes accordingly.

This may involve changing out shock absorbers, springs or installing a larger sway bar, as well as ensuring that the Ram 3500’s brake system is adequate for the increased power by fitting a larger master cylinder or booster. 

How Would Dodge Ram 3500 Benefit from Engine Change

Obviously, swapping out an engine can be a great way to make your Ram 3500 move again! It is also able to provide more horsepower, improved fuel economy, smoother acceleration, better handling, and lower emissions than the original motor.

Although, it rarely combines multiple benefits. Larger and hungrier engines are quite unlikely to show lowered fuel consumption while diesel engines can have serious emissions.

How Long Does It Take to Swap an Engine on Ram 3500?

Interchanging compatible engines is a complex job that can take between 8 to 15 hours, depending on the integration difficulty. Those with mechanical expertise may be able to reduce this timeframe - simple gas or diesel engines can be substituted in only 5-6 hours if you have the right devices and understanding.

How Hard Is It to Swap Dodge Ram 3500 Engine?

Replacing the Ram 3500’s motor is no small task. It requires careful and meticulous steps in the correct order, as well as specialized tools, parts, and equipment. In some cases, having an assistant may also be necessary for certain tasks. It can be a lengthy process with many steps, but it is often well worth the effort if done properly.

The difficulty depends on how closely two compatible engines you are swapping resemble each other. Size, type and other crucial specifications influence the challenge.

How Much Does Ram 3500 Engine Interchange Cost?

When weighing the expenses of buying a used car instead of your Dodge Ram 3500 or replacing an engine, consider that although expensive, an engine swap is often more cost-effective. 

On average, the labor cost for the Ram 3500 engine replacement will range from $1500 to $4000. The motor’s price tag may also vary significantly though you should be ready to pay a anywhere between $2000 and $4000 thousand dollars for a used engine. 

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