Dodge Dakota 1997-2004 3.9L Engine Specifications
Explore detailed technical specifications for the 1997-2004 Dodge Dakota 3.9L V6 engine. Learn about horsepower, torque, fuel system, compression ratio, and maintenance tips for optimal performance and reliability.
Overview Specifications
This document provides detailed specifications and technical information about the 3.9L V6 engine used in the 1997-2004 Dodge Dakota. It is designed to assist owners, mechanics, and enthusiasts in understanding the engine's features, performance, and maintenance requirements. Use the search and navigation instructions to quickly find relevant information. The document is divided into sections covering engine design, performance, maintenance, and key specifications.
How to Use
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Key Specifications
Horsepower
175 HP @ 4,800 RPM
Torque
225 lb-ft @ 3,200 RPM
Displacement
3.9L (239 cu in)
Compression Ratio
8.9:1
Fuel Economy
15 MPG city / 20 MPG highway
Available Specifications
Engine Design
This section covers the design and construction of the 3.9L V6 engine, including its configuration, materials, and key components. Learn about the engine's architecture and how it contributes to performance and durability.
Engine Design
This section covers the design and construction of the 3.9L V6 engine, including its configuration, materials, and key components. Learn about the engine's architecture and how it contributes to performance and durability.
Engine Configuration
- V6 configuration with a 90-degree bank angle
- Cast iron engine block for durability
- Aluminum cylinder heads for reduced weight
- Overhead valve (OHV) design with two valves per cylinder
- Displacement of 3.9 liters (239 cubic inches)
- Bore and stroke of 3.91 x 3.31 inches
Key Components
- Hydraulic roller lifters for reduced friction
- Forged steel crankshaft for strength
- Powdered metal connecting rods for lightweight construction
- High-flow intake and exhaust ports
- Sequential multi-port fuel injection system
- Electronic ignition system for precise timing
Performance Specifications
This section details the performance metrics of the 3.9L V6 engine, including horsepower, torque, and fuel efficiency. Understand how the engine delivers power and efficiency for the Dodge Dakota.
Performance Specifications
This section details the performance metrics of the 3.9L V6 engine, including horsepower, torque, and fuel efficiency. Understand how the engine delivers power and efficiency for the Dodge Dakota.
Power Output
- 175 horsepower at 4,800 RPM
- 225 lb-ft of torque at 3,200 RPM
- Compression ratio of 8.9:1
- Redline at 5,200 RPM
- Designed for regular unleaded gasoline
- EPA estimated fuel economy of 15 MPG city / 20 MPG highway
Performance Features
- Electronic throttle control for responsive acceleration
- Tuned intake manifold for improved airflow
- Low-restriction exhaust system for better efficiency
- Balanced rotating assembly for smooth operation
- Optimized camshaft profile for mid-range torque
- Designed for towing capacity up to 4,000 lbs
Maintenance and Service
This section provides guidelines for maintaining and servicing the 3.9L V6 engine. Learn about recommended service intervals, common issues, and tips for keeping the engine in optimal condition.
Maintenance and Service
This section provides guidelines for maintaining and servicing the 3.9L V6 engine. Learn about recommended service intervals, common issues, and tips for keeping the engine in optimal condition.
Service Intervals
- Oil change every 3,000-5,000 miles
- Spark plug replacement every 30,000 miles
- Air filter replacement every 15,000 miles
- Coolant flush every 60,000 miles
- Timing chain inspection every 100,000 miles
- Fuel system cleaning every 50,000 miles
Common Issues
- Oil leaks from valve cover gaskets
- Worn timing chain tensioners
- Carbon buildup on intake valves
- Faulty ignition coils
- Coolant leaks from intake manifold gaskets
- Exhaust manifold cracks
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Engine Specifications
Overview
- Type
- V6
- Configuration
- 60-degree V6
- Displacement
- 3.9 liters (239 cubic inches)
- Fuel System
- Multi-port fuel injection
- Material
- Cast iron block, aluminum heads
- Location
- Front longitudinal
Dimensions
- Length
- 27.5 inches (698.5 mm)
- Width
- 28.3 inches (718.8 mm)
- Height
- 26.7 inches (678.2 mm)
- Weight
- 450 lbs (204.1 kg)
- Bore
- 3.91 inches (99.3 mm)
- Stroke
- 3.31 inches (84.0 mm)
- Compression Ratio
- 9.1:1
Materials
- Engine Block
- Cast iron
- Cylinder Heads
- Aluminum
- Pistons
- Aluminum alloy
- Crankshaft
- Forged steel
- Valves
- Stainless steel
Features
- Ignition System
-
- Distributorless ignition system (DIS)
- Coil-on-plug design
- Electronic spark advance
- Fuel System
-
- Sequential multi-port fuel injection
- Returnless fuel system
- 58 psi fuel pressure
- Cooling System
-
- Cross-flow radiator
- Thermostatically controlled electric fan
- Coolant capacity: 12.5 quarts (11.8 liters)
- Lubrication System
-
- Full-pressure oil system
- Oil capacity: 5 quarts (4.7 liters)
- Oil filter: Spin-on type
- Emissions Control
-
- Catalytic converter
- EGR (Exhaust Gas Recirculation)
- PCV (Positive Crankcase Ventilation)
Safety Features
- Engine Management
-
- Fail-safe cooling mode
- Overheat protection
- Emissions
-
- OBD-II compliant
- Evaporative emissions control
- Electrical
-
- Fused ignition system
- Short-circuit protection
Comfort Features
- Noise Reduction
-
- Hydraulic engine mounts
- Acoustic engine cover
- Vibration Control
-
- Balanced crankshaft
- Dual-mass flywheel
- Climate Control
-
- Heater core integration
- A/C compressor compatibility
Accessories
- Belts And Pulleys
-
- Serpentine belt
- Tensioner pulley
- Idler pulley
- Hoses And Clamps
-
- Radiator hoses
- Heater hoses
- Clamps
- Sensors
-
- Coolant temperature sensor
- Crankshaft position sensor
- Oxygen sensor
Maintenance
- Service interval
- Every 7,500 miles or 6 months
- Service Items
-
- Oil and filter change
- Spark plug replacement
- Air filter inspection
- Coolant level check
- Belt tension check
- Maintenance Notes
- Use 10W-30 oil for optimal performance. Replace timing belt every 100,000 miles.
Warranty
- Basic
- Miles: 36,000Years: 3Coverage: Bumper-to-bumper
- Powertrain
- Miles: 60,000Years: 5Coverage: Engine and transmission
- Corrosion
- Miles: 100,000Years: 7Coverage: Perforation only
- Emissions
- Miles: 50,000Years: 2Coverage: Federal emissions components
Production Details
- Manufacturer
- Chrysler Corporation
- Manufacturing Process
-
- Casting for engine block
- CNC machining for cylinder heads
- Assembly line integration
- Quality Control
- inspection: 100% engine testingTolerances: Within 0.001 inches
- Sustainability Practices
-
- Recycled materials in casting
- Low-emission manufacturing
- Production Metrics
- Units Per Day: 500Defect Rate: 0.1%
Service Information for 3.9l engine Service
Maintenance and service requirements specific to this component
- Oil and filter change
- Inspect air filter
- Check coolant level
- Inspect belts and hoses
- Check spark plugs
Use synthetic oil for extended intervals.
- Replace air filter
- Inspect fuel system
- Check ignition system
- Inspect cooling system
- Replace PCV valve
Ensure all connections are secure.
- Replace timing belt
- Replace water pump
- Inspect and replace gaskets
- Flush cooling system
- Perform compression test
Critical to replace timing belt to prevent engine damage.
Common Questions
Find answers to common questions about torque specifications
Q1 Is the 3.9L engine compatible with other Dodge models from 1997-2004?
Is the 3.9L engine compatible with other Dodge models from 1997-2004?
The 3.9L V6 engine used in the 1997-2004 Dodge Dakota is primarily designed for this model. While it shares some components with other Chrysler engines, direct compatibility with other models like the Dodge Durango or Ram is limited. Always verify part numbers and consult a service manual before attempting cross-model installations.
Q2 What are the maintenance requirements for the 3.9L engine?
What are the maintenance requirements for the 3.9L engine?
The 3.9L engine requires regular maintenance, including oil changes every 3,000-5,000 miles, air filter replacement every 15,000 miles, and spark plug replacement every 30,000 miles. Additionally, inspect the timing belt, coolant system, and fuel injectors annually to ensure optimal performance and longevity.
Q3 How do I replace the 3.9L engine in a Dodge Dakota?
How do I replace the 3.9L engine in a Dodge Dakota?
Replacing the 3.9L engine involves disconnecting the battery, draining fluids, and removing components like the exhaust manifold, radiator, and transmission connections. Use an engine hoist to lift the old engine out and lower the new one in. Reassemble all components, refill fluids, and test the engine before driving.
Q4 What are common troubleshooting steps for the 3.9L engine?
What are common troubleshooting steps for the 3.9L engine?
Common issues include rough idling, poor fuel economy, and overheating. Start by checking the fuel injectors, spark plugs, and ignition system. Inspect the coolant system for leaks and ensure the thermostat is functioning. Use an OBD-II scanner to diagnose error codes for more precise troubleshooting.
Q5 How can I optimize the performance of the 3.9L engine?
How can I optimize the performance of the 3.9L engine?
To optimize performance, upgrade to high-flow air filters and exhaust systems. Use synthetic oil for better lubrication and heat resistance. Regularly clean the throttle body and fuel injectors. Consider a performance chip or ECU tune for improved horsepower and torque, but ensure compatibility with your vehicle.
Factory Service Resources
Access official service manuals, technical documents, and repair guides. These resources provide detailed procedures, specifications, and diagrams directly from the manufacturer.
1997-2004 Dodge Dakota Service Manual
Coming SoonComprehensive guide covering engine repair, maintenance, and troubleshooting for the 3.9L V6 engine.
Technical Service Bulletin for 3.9L Engine
Coming SoonDetails common issues and recommended fixes for the 3.9L engine, including updates from Dodge.
Dodge Dakota Parts and Accessories Catalog
Coming SoonCatalog listing OEM and aftermarket parts for the 1997-2004 Dodge Dakota, including engine components.
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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.
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