Dodge Ram 2500 2003-2009 5.9L Engine Engine Specifications
Dodge Ram 2500 2003-2009

Dodge Ram 2500 2003-2009 5.9L Engine Specifications

Explore detailed 5.9L engine specifications for the 2003-2009 Dodge RAM 2500. Learn about horsepower, torque, fuel system, and more for maintenance, upgrades, and performance optimization.

Updated

Overview Specifications

This document provides detailed specifications and technical information about the 5.9L Cummins diesel engine used in the 2003-2009 Dodge RAM 2500. It is designed to assist owners, mechanics, and enthusiasts in understanding the engine's features, performance, and maintenance requirements. Use the search functionality to locate specific details or navigate through the sections for a comprehensive overview of the engine's capabilities and design.

How to Use

Use the search bar to enter keywords related to the 5.9L engine, such as 'torque,' 'horsepower,' or 'fuel system.' This will quickly direct you to relevant sections and subsections.

Scroll through the document or use the table of contents to access major sections. Each section is organized into subsections with detailed technical points for easy reference.

Key Specifications

Displacement

5.9L

Horsepower

325 HP

Torque

610 lb-ft

Fuel System

Common Rail

Compression Ratio

17.3:1

Available Specifications

Engine Performance

This section covers the performance metrics of the 5.9L Cummins engine, including horsepower, torque, and fuel efficiency. It also highlights the engine's reliability and towing capabilities, making it a popular choice for heavy-duty applications.

Horsepower and Torque
  • 325 horsepower at 2,900 RPM
  • 610 lb-ft of torque at 1,600 RPM
  • Optimized for heavy-duty towing and hauling
  • Consistent power delivery across RPM range
Fuel Efficiency
  • Average fuel economy of 14-18 MPG
  • Common Rail fuel injection system for improved efficiency
  • Low emissions for a diesel engine of its size
  • Designed for long-distance driving with minimal fuel stops

Engine Design

This section delves into the design features of the 5.9L Cummins engine, including its construction, cooling system, and fuel delivery. These elements contribute to the engine's durability and performance in demanding conditions.

Construction and Materials
  • Cast-iron block for durability
  • Forged steel crankshaft for strength
  • High-strength aluminum alloy cylinder head
  • Designed to withstand high compression ratios
Cooling System
  • Dual thermostats for efficient temperature regulation
  • Heavy-duty radiator for improved heat dissipation
  • Coolant bypass system for consistent engine temperature
  • Designed for extreme weather conditions

Maintenance and Reliability

This section provides insights into the maintenance requirements and reliability of the 5.9L Cummins engine. It includes recommended service intervals, common issues, and tips for extending the engine's lifespan.

Service Intervals
  • Oil change every 7,500 miles or 6 months
  • Fuel filter replacement every 15,000 miles
  • Air filter inspection every 30,000 miles
  • Coolant flush every 60,000 miles
Common Issues
  • Injector failure in high-mileage engines
  • Turbocharger wear over time
  • EGR valve clogging in some models
  • Regular maintenance can prevent most issues

Engine Specifications

Overview

Type
Inline-6 Turbo Diesel
Configuration
Longitudinal
Platform
Cummins ISB
Material
Cast Iron Block and Head
Location
Front Engine, Rear-Wheel Drive
Displacement
5.9 liters (359 cubic inches)

Dimensions

Length
37.5 inches (952.5 mm)
Width
28.3 inches (718.8 mm)
Height
38.2 inches (970.3 mm)
Weight
1,100 lbs (499 kg)
Bore
4.02 inches (102.1 mm)
Stroke
4.72 inches (119.9 mm)
Oil Capacity
12 quarts (11.4 liters)
Coolant Capacity
18 quarts (17 liters)

Materials

Block
Cast Iron
Cylinder Head
Cast Iron
Pistons
Aluminum Alloy
Crankshaft
Forged Steel
Valves
Stainless Steel

Features

Fuel System
  • High-Pressure Common Rail Injection
  • Electronic Control Module (ECM)
  • Turbocharger with Wastegate
Cooling System
  • Dual Thermostats
  • High-Capacity Radiator
  • Coolant Bypass System
Emissions
  • Exhaust Gas Recirculation (EGR)
  • Diesel Particulate Filter (DPF)
  • Oxidation Catalyst
Performance
  • 325 HP @ 2,900 RPM
  • 610 lb-ft Torque @ 1,600 RPM
  • Turbo Lag Reduction
Durability
  • Forged Steel Connecting Rods
  • Hardened Valve Seats
  • Heavy-Duty Timing Gear

Safety Features

Engine Protection
  • Low Oil Pressure Shutdown
  • Overheat Protection
  • Turbo Overspeed Protection
Emissions Compliance
  • EPA Tier 2 Compliance
  • OBD-II Diagnostics

Comfort Features

Noise Reduction
  • Acoustic Engine Cover
  • Isolated Engine Mounts
  • Turbo Muffler
Vibration Control
  • Balanced Crankshaft
  • Hydraulic Engine Mounts

Accessories

Cooling
  • Heavy-Duty Fan Clutch
  • Auxiliary Transmission Cooler
  • Power Steering Cooler
Electrical
  • High-Output Alternator
  • Dual Batteries
  • Glow Plug System
Exhaust
  • Stainless Steel Exhaust Manifold
  • Turbo Downpipe
  • Muffler with Resonator

Maintenance

Service interval
Every 7,500 miles or 6 months
Service Items
  • Oil and Filter Change
  • Fuel Filter Replacement
  • Air Filter Inspection
  • Coolant Level Check
  • Belt Tension Inspection
Maintenance Notes
Use only synthetic 15W-40 oil for optimal performance.

Warranty

Basic
Miles: 100,000
Years: 5
Coverage: Powertrain Components
Emissions
Miles: 50,000
Years: 2
Coverage: Catalytic Converter, DPF
Corrosion
Miles: Unlimited
Years: 5
Coverage: Perforation Only
Roadside Assistance
Miles: Unlimited
Years: 3
Coverage: Towing, Lockout Service

Production Details

Manufacturer
Cummins Inc.
Manufacturing Process
  • Precision Casting
  • CNC Machining
  • Dynamic Balancing
Quality Control
inspection: 100% Engine Testing
Tolerances: Micron-Level Precision
Sustainability Practices
  • Recycled Materials in Castings
  • Low-Emission Manufacturing
  • Energy-Efficient Facilities
Production Metrics
Annual Output: 250,000 Units
Defect Rate: 0.01%

Service Information for 5.9l engine Service

Maintenance and service requirements specific to this component

7,500
6
  • Oil and Filter Change
  • Fuel Filter Replacement
  • Air Filter Inspection
  • Coolant Level Check
  • Belt Tension Inspection

Use synthetic 15W-40 oil for optimal performance.

15,000
12
  • Transmission Fluid Check
  • Turbocharger Inspection
  • EGR Valve Cleaning
  • Glow Plug Testing

Inspect for turbocharger wear and carbon buildup.

100,000
60
  • Timing Belt Replacement
  • Water Pump Replacement
  • Injector Calibration
  • DPF Cleaning

Major service requires specialized tools and diagnostics.

Common Questions

Find answers to common questions about torque specifications

Q1

Is the 5.9L engine compatible with other Dodge RAM models?

The 5.9L Cummins diesel engine, used in the 2003-2009 Dodge RAM 2500, is specifically designed for heavy-duty applications. While it shares similarities with other Cummins engines, compatibility with other RAM models depends on the year and configuration. Always verify with a certified mechanic or Dodge dealership to ensure proper fitment and avoid potential issues.

Q2

What are the maintenance requirements for the 5.9L engine?

The 5.9L engine requires regular maintenance to ensure longevity. Key tasks include oil changes every 7,500 miles, fuel filter replacements every 15,000 miles, and air filter inspections every 12,000 miles. Additionally, coolant flushes, belt inspections, and injector cleaning should be performed as per the manufacturer’s schedule. Adhering to these guidelines helps maintain optimal performance and prevents costly repairs.

Q3

How do I replace the 5.9L engine in a Dodge RAM 2500?

Replacing the 5.9L engine involves several steps: disconnect the battery, drain fluids, remove the radiator, and detach the transmission. Unbolt the engine mounts and lift the engine using a hoist. Install the new engine by reversing the process, ensuring all connections are secure. Torque bolts to manufacturer specifications and refill fluids. Professional assistance is recommended for this complex procedure.

Q4

What should I do if my 5.9L engine is losing power?

If your 5.9L engine is losing power, check for clogged fuel filters, dirty air filters, or faulty injectors. Inspect the turbocharger for leaks or damage and ensure the exhaust system is not restricted. Use a diagnostic tool to scan for error codes. If issues persist, consult a certified mechanic to diagnose and resolve the problem effectively.

Q5

How can I optimize the performance of my 5.9L engine?

To optimize performance, consider upgrading the air intake and exhaust systems for better airflow. Use high-quality synthetic oil and fuel additives to improve lubrication and combustion. Regularly clean the EGR valve and inspect the turbocharger. Tuning the ECU can also enhance power and efficiency, but ensure modifications comply with local emissions regulations.

Factory Service Resources

Access official service manuals, technical documents, and repair guides. These resources provide detailed procedures, specifications, and diagrams directly from the manufacturer.

2003-2009 Dodge RAM 2500 Service Manual

Coming Soon

Comprehensive guide covering maintenance, repairs, and technical specifications for the 5.9L engine and related systems.

Technical Service Bulletin for 5.9L Engine Updates

Coming Soon

Official bulletin detailing updates, recalls, and fixes for the 5.9L engine in Dodge RAM 2500 models.

Dodge RAM 2500 Parts and Accessories Catalog

Coming Soon

Catalog listing OEM and aftermarket parts, including engine components, for the 2003-2009 Dodge RAM 2500.

Legal Disclaimer

Important information about using this content

Always refer to your vehicle's service manual and take appropriate safety precautions when performing any maintenance or repairs.

General Information
The information provided on this website is for general informational purposes only. While we strive to maintain accuracy in our content, all specifications, procedures, and technical information should be verified against your vehicle's official service manual or with the manufacturer directly.
Warranty & Liability

The content on this website is provided "as is" without any representations or warranties, express or implied. We make no representations or warranties regarding the accuracy, completeness, or availability of the information.

We shall not be liable for any direct, indirect, special, or consequential damages arising from the use of information on this website.

Technical Information
  • All specifications, including torque values, fluid capacities, and maintenance procedures, should be verified against your vehicle's factory service manual.
  • Vehicle specifications and procedures may vary by model year, trim level, and region.
  • Always follow the manufacturer's recommended procedures and safety precautions.
  • Working on vehicles can be dangerous. Always take proper safety precautions and use appropriate safety equipment.
  • If you're unsure about any procedure, consult a qualified professional mechanic.
Intellectual Property
All content, including text, images, and specifications, is protected by copyright and other intellectual property laws. Any unauthorized use or reproduction is prohibited.

About the Author

Expert automotive knowledge and experience

Alan Montanye - Automotive Technical Specialist
ASE

Alan Montanye

Automotive Technical Specialist

ASE Master Certified Technician with over a decade of hands-on experience in automotive repair and diagnostics.

15+ Years
Experience
500+ Guides
Guides
50+ Makes
Vehicles
1000+ Solutions
Solutions

Diagnostic

Specialized in advanced diagnostic techniques using modern scan tools and oscilloscopes.

Repair

Expert in both traditional mechanical repairs and modern vehicle systems.

Additional Expertise

Documentation

Created over 500 detailed repair guides and technical documents.

Training

Conducted technical training sessions and contributed to repair databases.

Certifications & Research

Certifications

  • ASE Master Technician Certification
  • Advanced Diagnostic Specialist
  • Hybrid/Electric Vehicle Systems
  • Performance Tuning Expert

Research & Community

Actively researches emerging technologies and contributes to automotive forums.

© 2025 Dodge Specs. All rights reserved.