* Engine Generation: Cummins engines have evolved significantly over the years. A 2002 Ram 2500 likely had a 5.9L or a 24-valve 5.9L Cummins. Swapping in a later-generation 6.7L Cummins from a newer 2500 would require extensive modifications, potentially including:
* Wiring Harness: The newer engine's computer and wiring are completely different.
* Mounting Brackets: The engine mounts themselves may not align.
* Exhaust System: The exhaust systems are usually unique to each engine generation.
* Transmission Compatibility: While the transmission might *bolt* up, the computer interface might not be compatible.
* Emissions Compliance: Depending on your location, swapping in a newer engine with different emission standards could be a major issue with registration and inspection.
In short, while it *could* be done, it's a very complex and expensive project that requires significant mechanical knowledge and skills. It's far from a simple bolt-in affair. If you're considering this, you should consult with experienced diesel mechanics to assess the feasibility and cost before starting the project. A direct swap with a similar year Cummins is the only realistic option with minimal modification, even then some adjustments might still be needed.
