The Dodge Ram 2500 and 3500 trucks, particularly the second-generation models (2003-2009), have earned a reputation for their robust capabilities. However, some enthusiasts crave even more power and torque. That's where a 6.7 Cummins engine swap comes into play, transforming a capable truck into an absolute powerhouse. This comprehensive guide delves into the intricacies of this ambitious project, covering everything from feasibility to common challenges and solutions.
Why Swap to a 6.7 Cummins?
The 6.7 Cummins, known for its exceptional reliability and immense power, is a highly sought-after upgrade for second-generation Ram owners. Its significant torque advantage over the factory 5.9 Cummins and the comparatively weak 5.7 Hemi gasoline engine makes it a popular choice for those looking to tow heavier loads or engage in serious off-roading. The increased horsepower also translates to a noticeable improvement in overall performance and drivability.
What's Involved in a 6.7 Cummins Swap?
This isn't a weekend project. A successful 6.7 Cummins swap requires significant mechanical expertise, specialized tools, and a considerable investment of time and resources. The process involves far more than simply bolting in a new engine. Here's a breakdown of the key components:
Engine and Transmission:
- Engine: Sourcing a used 6.7 Cummins engine is a common approach, offering a balance of cost and availability. Ensure thorough inspection for any potential issues before installation.
- Transmission: The 68RFE automatic transmission is typically paired with the 6.7 Cummins. This requires an entirely new transmission, transfer case, and associated components.
Mounting and Modifications:
- Engine Mounts: Custom engine mounts will likely be necessary to properly secure the larger 6.7 Cummins within the second-generation Ram's engine bay.
- Wiring Harness: The 6.7 Cummins' electrical system is significantly different. A custom wiring harness or extensive rewiring is often required to integrate it with the truck's existing systems.
- Exhaust System: A custom exhaust system is needed to accommodate the larger engine.
- Cooling System: The 6.7 Cummins requires a more robust cooling system than the original engine. Upgrades to the radiator, water pump, and other components are usually necessary.
Other Considerations:
- Computer/ECU Tuning: Proper tuning of the engine control unit (ECU) is crucial to optimize performance and prevent damage.
- Driveshafts: The change in transmission and engine might necessitate changes to the driveshafts.
- Fuel System: The 6.7 Cummins has different fuel system requirements compared to the 5.9L.
Is a 6.7 Cummins Swap Difficult?
H2: How difficult is a 6.7 Cummins swap?
Yes, this is a very challenging project. It's not a task for novice mechanics. The complexity of the swap necessitates advanced mechanical skills, specialized tools, and a deep understanding of automotive electrical systems. Many individuals choose to seek professional assistance from experienced mechanics specializing in engine swaps.
What are the common problems with a 6.7 Cummins swap?
H2: What are the common problems encountered during a 6.7 Cummins swap?
Common problems include sourcing compatible components, fabricating custom mounts, and resolving compatibility issues with the vehicle's existing electrical and computer systems. Improper tuning can lead to engine damage, and overlooking critical aspects of the cooling system can result in overheating.
How much does a 6.7 Cummins swap cost?
H2: How much does a 6.7 Cummins swap typically cost?
The cost varies greatly depending on the source of parts (new versus used), the level of professional assistance required, and the extent of custom fabrication. Expect a significant investment, ranging from thousands to tens of thousands of dollars.
Is it worth it to swap a 6.7 Cummins into a 2nd gen Ram?
H2: Is a 6.7 Cummins swap worthwhile for a 2nd gen Ram?
The decision depends heavily on individual circumstances and priorities. If you need significantly more towing capacity, crave enhanced performance, and are comfortable with the high cost and considerable mechanical challenge, then it could be worthwhile. However, for those seeking a simpler upgrade, other modifications might be more suitable.
Conclusion:
Swapping a 6.7 Cummins into a second-generation Dodge Ram is a substantial undertaking. Thorough planning, mechanical expertise, and a significant budget are essential for a successful outcome. While the challenges are considerable, the rewards—in the form of unparalleled power and towing capacity—can be well worth the effort for dedicated enthusiasts. Remember to consult with experienced mechanics throughout the process to ensure a safe and successful installation.
