Dodge Ram Cummins Engines: A Buyer’s Guide
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The Dodge Ram Cummins engine is a long-time favorite among fans of heavy-duty trucks. Known for their incredible torque, durability, and performance, Cummins engines have maintained a stellar reputation through the years. Whether you’re buying a pre-owned Dodge Ram, thinking about upgrading to a new crate engine, or simply curious about these powerhouses, this guide offers an informed decision. Here’s a buyer’s guide to Dodge Ram Cummins engines, with a breakdown of key Cummins engines and their applications.
A Powerhouse Legacy
The Cummins name goes all the way back to 1919, with the company building and developing diesel engines for multiple purposes. By 1988, Dodge had infused its full-size Ram pickups with Cummins diesel power, setting a new standard for truck performance and durability. Buyers were drawn to these trucks by their superior towing capacity, longevity, and efficiency.
From the first-generation 5.9L 12-valve engines to the 5.9 Cummins crate engine to today’s cutting-edge 6.7L options, Cummins engines continued to evolve and deliver more torque, better fuel efficiency, and lower emissions. What makes Cummins stand out is its unique ability to handle heavy-duty applications while maintaining everyday reliability. Here are a few stand-out engines from the company’s line and what made them special. Keep reading: you might find the perfect engine for your purposes!
First-Generation Engines (1989–1993)
The 5.9L 12-valve Cummins engine debuted in 1989. Its reputation as a robust engine was instantaneous. Producing 160 horsepower and 400 pound-feet of torque, this turbocharged engine became synonymous with heavy-duty durability. Because of its mechanical fuel injection system, it could be modified easily to produce more power.
These engines are now collector's items. They remain highly regarded for their simplicity and raw performance and are sought-after for people restoring older Ram pickups.
The Mid-Range Era (1994–2007 5.9L Cummins)
Second-generation Cummins engines (1994 through 2002) experienced significant upgrades. The 1998 5.9L 24-valve design introduced advanced electronic control modules (ECMs), which enhanced fuel injection precision and overall performance.
From 2003 to 2007, Cummins truly established dominance in the diesel engine field. By this point, its engines produced 325 horsepower and 610 pound-feet of torque. Some consider this the golden age of Dodge Cummins engines. These models are incredibly popular among truck enthusiasts due to their balance of power, reliability, and robust aftermarket support.
As a restoration tip, a 5.9 Cummins crate engine is an excellent upgrade for 2004 through 2007 models, as it ensures top-tier performance for heavy-duty tasks.
Why Choose the 5.9L Cummins?
- Durability: With proper care, these engines easily reach 500,000 miles or more.
- Aftermarket options: These offer the opportunity for endless modifications, ranging from engine tuning to turbo upgrades.
- Versatile applications: Ideal for towing, off-road use, and daily driving
Modern-Day (2007–Present)
Since 2007, the 6.7L Cummins diesel engine has moved to the fore. This engine offers improved towing capabilities, stricter emissions standards, and incredible power—up to 420 horsepower and 1,075 pound-feet of torque. Variable geometry turbos (VGT), diesel exhaust fluid (DEF) systems, and other modern upgrades help these engines remain compliant with environmental regulations while saving on fuel consumption.
Benefits of the 6.7L Cummins
- High torque output: Perfect for drivers who regularly tow heavy loads
- Environmental friendliness: Reduced emissions with advanced DEF systems
- Cutting-edge features: Enhanced engine braking, integrated exhaust brakes, and modern ECM controls
Tips for Buying a Used Dodge Ram Cummins
Ready to buy an old or new Cummins diesel engine? Here are a few things to know while you shop to ensure a smart investment.
Mileage
Cummins engines are known for their longevity, but the longer an engine is on the road, the more wear and tear it experiences. Try to find a Cummins engine with fewer miles on it to ensure reliability. Naturally, the older the engine, the more miles it will have.
Maintenance History
Well-maintained engines last longer and experience less debilitating stress. Ask for the engine’s maintenance history, including oil changes, filter replacements, tunings and other modifications, and any accidents. Check to see whether any modifications were added correctly, since poorly done ones can harm an engine.
Check for Aftermarket Support
That means ensuring part availability. Owners of older vehicles and engines may encounter issues when trying to find replacement parts. Luckily, Cummins-powered vehicles have a thriving community of aficionados and access to plenty of replacement parts.
Focus on Known Issues
Study up on Cummins engines and their various quirks and requirements. Early 6.7L models are especially prone to emission system clogs, for example. This may influence your decision to buy, since you must address such issues to achieve peak performance.
Upgrades That Enhance Performance
For truck-owners seeking greater horsepower or torque, Cummins engines are easily upgraded. Popular upgrades include high-performance injectors, upgraded turbochargers, and performance tuners. These aid the engine’s ability to provide greater torque for towing heavy payloads, greater fuel efficiency for longer hauls, and extended longevity. And speaking of longevity…
Maintenance Tips for Longer Engine Life
Regular maintenance is the key to preserving your Cummins-powered Dodge Ram. Every engine thrives with regular upkeep.
- Regular oil changes: Use high-quality diesel engine oil to protect the engine from premature wear.
- Fuel system care: Clean the injectors to maintain peak performance.
- Monitor coolant levels: Cummins engines run hot, so maintain your cooling system and keep it measured and topped off.
- Inspect the turbochargers: Check for boost leaks and listen for strange noises coming from the turbo.
- Optimize tuning: Overly aggressive tuning strains your transmission and other components. Go easy on your engine!
That’s a quick buyer’s guide to Dodge Ram Cummins engines. Cummins engines are engineering miracles that redefined the world of heavy-duty trucks. They offer fantastic towing capabilities and great reliability, setting a high benchmark for diesel engines. Whether you’re hitting the road for an off-road adventure or pulling a loaded trailer across the country, Cummins has proven to be the ultimate partner for truck enthusiasts worldwide.
Ready to breathe new life into your vehicle? Contact us for more information. We offer an assortment of parts, equipment, devices, and services that ensure better performance from your truck or other vehicle. Look through our site, or contact us with any questions. We've been in business for many years, so we know our stuff! We look forward to working with you to improve your ride.
