Pros:
* Powerful and Torquey: Known for its impressive low-end torque, making it excellent for towing and hauling heavy loads.
* Durable: Cummins engines are generally renowned for their durability and longevity, especially when properly maintained. Many last for hundreds of thousands of miles.
* Relatively Reliable (with caveats): Compared to some other diesel engines, the 2009 6.7L Cummins is considered relatively reliable, though problems can arise.
Cons:
* DEF System (Diesel Exhaust Fluid): This system is required to meet emissions standards and adds complexity. Problems with the DEF system, such as sensor failures or blocked lines, can lead to reduced performance or engine shutdowns.
* EGR System (Exhaust Gas Recirculation): The EGR system can be prone to issues, particularly the cooler, which can clog or fail. This can lead to performance problems and costly repairs.
* Turbocharger Issues: Turbocharger failure is a potential problem, although not overly common, and can be expensive to repair.
* Complexity: Being a modern diesel engine, it's more complex than older designs, potentially leading to more expensive repairs. Diagnosing problems can be challenging.
* Maintenance Costs: Diesel maintenance is generally more expensive than gasoline maintenance, requiring specialized fluids and filters.
Overall:
The 2009 Dodge Cummins 6.7L is a capable engine with a strong reputation for power and durability. However, potential issues with the DEF and EGR systems, along with the higher cost of maintenance, should be considered. Regular maintenance is crucial to minimize the risk of problems and maximize the engine's lifespan. Before buying a used truck with this engine, a thorough inspection by a qualified mechanic specializing in diesel engines is highly recommended. Checking service records is also essential.
