Swapping a 6.7L Cummins into a second-generation Dodge Ram is a popular modification among diesel enthusiasts, offering significant power and performance upgrades. However, it's a complex undertaking requiring significant mechanical expertise, time, and resources. This guide delves into the intricacies of this swap, addressing common questions and providing crucial information for those considering this ambitious project.
What's Involved in a 6.7 Cummins Swap into a Second-Gen Ram?
This isn't a simple bolt-on affair. A successful 6.7 Cummins swap into a second-gen Dodge Ram (typically 1994-2002) requires extensive modifications. You're essentially transplanting a modern engine into a significantly older chassis. This involves addressing compatibility issues with the engine's electronic control systems, the transmission, the drivetrain, and the chassis itself. Expect to encounter challenges with:
- Engine Mounts: Fabricating or adapting custom engine mounts is crucial for secure engine placement.
- Transmission: The 6.7 Cummins typically utilizes a different transmission than the second-gen Rams. This often requires a complete transmission swap and associated modifications to the driveshaft and transfer case.
- Wiring Harness: Integrating the 6.7 Cummins' complex electronic control system into the older truck's electrical system is a major hurdle. This often involves custom wiring harnesses and potentially a standalone engine control unit (ECU).
- Exhaust System: A completely new exhaust system will be needed to accommodate the larger engine and emissions regulations.
- Fuel System: The 6.7 Cummins has higher fuel demands and may require upgrades to the fuel tank, lines, and pump.
- Cooling System: The larger engine requires a more robust cooling system, potentially necessitating a larger radiator, fans, and water pump.
What are the Benefits of a 6.7 Cummins Swap?
Despite the complexities, the rewards can be substantial:
- Significant Power Increase: The 6.7 Cummins boasts considerably more horsepower and torque than the factory engines in second-gen Rams, dramatically improving towing and hauling capabilities.
- Modern Technology: You're essentially upgrading to a much more modern and refined powertrain with advanced fuel injection and emission controls (though you may choose to modify these).
- Improved Reliability (Potentially): A newer engine can offer improved reliability compared to a worn-out older engine, provided the swap is executed correctly and maintained properly.
What are the Common Problems Encountered During a 6.7 Cummins Swap?
Numerous challenges can arise during this swap:
- Wiring Complexity: As mentioned, integrating the 6.7's sophisticated electronics into the older truck's system can be extremely challenging and time-consuming.
- Custom Fabrication: Expect extensive fabrication work for engine mounts, exhaust systems, and other components.
- Cost: This swap is expensive, encompassing the cost of the engine, transmission, wiring harness (if needed), fabrication, and professional labor if you don't perform all the work yourself.
- Unexpected Issues: Unforeseen mechanical problems can significantly delay the project and add unexpected costs.
Is it Possible to Swap a 6.7 Cummins into a Second-Gen Ram Myself?
While theoretically possible for highly skilled mechanics, this is generally not recommended for DIY enthusiasts without extensive experience in engine swaps and diesel mechanics. The complexity and potential for costly mistakes make it a project best left to experienced professionals.
What Transmission is Compatible with a 6.7 Cummins Swap in a Second-Gen Ram?
The 6.7 Cummins typically uses an Allison automatic transmission, but the exact compatibility will depend on the specific year and model of the Cummins engine. A significant transmission adaptation or replacement is almost certainly required.
How Much Does a 6.7 Cummins Swap Cost?
The cost varies enormously depending on the condition of the donor engine and transmission, the extent of custom fabrication needed, and whether you perform the labor yourself or hire professionals. Expect to invest thousands of dollars, potentially tens of thousands, depending on the scale of the project.
Is it Worth Swapping a 6.7 Cummins into a Second-Gen Ram?
The decision hinges on your mechanical skills, budget, and desired outcome. If you're seeking maximum power and are comfortable with a challenging and potentially costly project, it can be a rewarding endeavor. However, if you're on a tight budget or lack the necessary expertise, it may be more practical to explore other performance upgrade options.
This detailed guide offers a comprehensive overview of a 6.7 Cummins swap in a second-generation Dodge Ram. Remember, meticulous planning, professional guidance where needed, and patience are crucial for a successful outcome. Always prioritize safety and consult with experienced mechanics throughout the process.
