Swapping a 6.7 Cummins into another vehicle is a popular project among diesel enthusiasts, offering a significant boost in power and torque. This guide delves into the intricacies of a second-generation 6.7 Cummins swap, covering everything from compatibility to potential challenges. We'll explore the reasons behind this popular upgrade and address frequently asked questions to help you navigate this complex undertaking.
Why Choose a Second-Gen 6.7 Cummins Swap?
The second-generation (2007.5-2012) 6.7 Cummins engine is highly sought after for its robust design, impressive power output, and relatively plentiful availability of parts. Its common rail fuel system delivers exceptional fuel efficiency and performance, making it a desirable upgrade for various platforms. The significant torque advantage over many factory engines translates to improved towing capacity and overall drivability.
What Vehicles are Suitable for a 6.7 Cummins Swap?
The feasibility of a 6.7 Cummins swap depends heavily on the recipient vehicle. While many projects exist, some platforms are more conducive than others. Factors to consider include frame size, engine bay dimensions, transmission compatibility, and the overall complexity of the electrical systems integration. Popular choices often involve trucks and SUVs with a robust chassis capable of handling the increased weight and power. However, creative solutions have resulted in successful swaps in unexpected vehicles.
What are the Challenges of a 6.7 Cummins Swap?
A 6.7 Cummins swap is not a simple bolt-on affair. Several significant challenges need careful consideration:
- Engine Mounts: Custom engine mounts are usually required, necessitating fabrication or sourcing from specialized suppliers.
- Transmission Compatibility: Choosing a transmission capable of handling the engine's torque is critical. Common choices include the 68RFE or Allison automatic transmissions, but proper adaptation is essential.
- Wiring Harness: Integrating the engine's complex electrical system with the recipient vehicle's wiring can be very involved. This may necessitate extensive rewiring or using a custom harness.
- Exhaust System: A custom exhaust system is almost always necessary, often requiring specialized fabrication to clear components and meet emissions regulations.
- Fuel System: Modifications to the fuel system are often required to ensure adequate fuel supply and pressure.
- Cooling System: The 6.7 Cummins demands a substantial cooling system, potentially requiring upgrades to the radiator and cooling fans.
What Parts Do I Need for a 6.7 Cummins Swap?
The parts list for a 6.7 Cummins swap is extensive and varies depending on the recipient vehicle and the desired level of customization. Essential components typically include:
- Engine: The 6.7 Cummins itself, preferably complete with accessories.
- Transmission: A compatible automatic transmission, such as the 68RFE or Allison.
- Transfer Case (if applicable): This will depend on the vehicle's drivetrain configuration.
- Engine Mounts: Custom fabricated engine mounts.
- Wiring Harness: Either a custom harness or an extensively modified factory harness.
- Exhaust System: A custom exhaust system.
- Fuel System Components: Modifications or upgrades to ensure proper fuel delivery.
- Cooling System Upgrades: A potentially larger radiator and high-capacity cooling fans.
- Driveshafts (if needed): Driveshaft lengths will likely need to be modified or replaced.
What is the Cost of a 6.7 Cummins Swap?
The cost of a 6.7 Cummins swap is highly variable and depends on several factors: the condition of the used engine and transmission, the level of custom fabrication required, the labor costs, and the expertise of the person (or shop) performing the work. Budgeting for unforeseen expenses is crucial. Expect a significant financial investment, potentially ranging from thousands to tens of thousands of dollars.
How Long Does a 6.7 Cummins Swap Take?
The time required for a 6.7 Cummins swap can vary greatly depending on the experience level of the installer, the complexity of the project, and the availability of parts. This type of swap is a significant undertaking and can easily take weeks, even months, to complete.
Where Can I Find Information and Support for a 6.7 Cummins Swap?
Numerous online communities and forums dedicated to diesel engine swaps provide invaluable resources and support. Connecting with experienced individuals who have undertaken similar projects can offer crucial guidance and insight throughout the process. Remember to carefully research and document every step of the way.
This comprehensive guide provides a solid foundation for understanding the complexities of a 6.7 Cummins second-gen swap. Remember, this is a challenging project requiring mechanical expertise, meticulous planning, and a substantial budget. Always prioritize safety and consult with experienced professionals when necessary.
