Infiniti QX56 2004-2010 5.6L V8 Engine Specifications
Explore detailed technical specifications for the 5.6L V8 engine in the 2004-2010 Infiniti QX56. Learn about horsepower, torque, maintenance, and compatibility for optimal performance and repairs.
Overview Specifications
This document provides detailed specifications and technical information about the 5.6L V8 engine used in the 2004-2010 Infiniti QX56. It is designed to assist enthusiasts, mechanics, and owners 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 design, capabilities, and key specifications.
How to Use
Use the search bar to enter keywords related to the engine's specifications, such as 'horsepower' or 'torque'. The results will highlight relevant sections and subsections for quick access.
Scroll through the document or use the table of contents to jump to specific sections. Each section is organized into subsections with detailed technical points for easy reference.
Key Specifications
Displacement
5.6L (5552 cc)
Horsepower
315 hp @ 4900 rpm
Torque
390 lb-ft @ 3600 rpm
Fuel Economy
12 mpg city / 18 mpg highway
Emissions
ULEV compliant
Available Specifications
Engine Design and Architecture
This section covers the fundamental design and architecture of the 5.6L V8 engine, including its configuration, materials, and construction. Learn about the engine's layout, cylinder arrangement, and key design features that contribute to its performance and durability.
Engine Design and Architecture
This section covers the fundamental design and architecture of the 5.6L V8 engine, including its configuration, materials, and construction. Learn about the engine's layout, cylinder arrangement, and key design features that contribute to its performance and durability.
Engine Configuration
- Naturally aspirated V8 configuration
- Displacement of 5.6 liters (5552 cc)
- 90-degree cylinder bank angle
- Aluminum alloy block and cylinder heads
- Dual overhead camshafts (DOHC)
- 32-valve setup with variable valve timing
Materials and Construction
- Lightweight aluminum block for reduced weight
- Forged steel crankshaft for durability
- High-strength connecting rods
- Plasma-sprayed cylinder bores for reduced friction
- Nano-level surface treatment on pistons
- Integrated oil cooler for thermal management
Performance Specifications
Explore the performance capabilities of the 5.6L V8 engine, including its power output, torque, and fuel efficiency. This section provides detailed metrics and insights into how the engine delivers its impressive performance.
Performance Specifications
Explore the performance capabilities of the 5.6L V8 engine, including its power output, torque, and fuel efficiency. This section provides detailed metrics and insights into how the engine delivers its impressive performance.
Power and Torque
- 315 horsepower at 4900 rpm
- 390 lb-ft of torque at 3600 rpm
- High-flow intake and exhaust systems
- Optimized combustion chamber design
- Electronic throttle control for precise power delivery
- Smooth power curve across the RPM range
Fuel Efficiency and Emissions
- EPA-estimated 12 mpg city / 18 mpg highway
- Direct fuel injection system
- Low-friction internal components
- Compliant with ULEV emissions standards
- Advanced engine management system
- Efficient cooling system for optimal thermal performance
Maintenance and Reliability
This section provides essential information on maintaining the 5.6L V8 engine, including recommended service intervals, common maintenance tasks, and tips for ensuring long-term reliability. Learn how to keep the engine running smoothly for years to come.
Maintenance and Reliability
This section provides essential information on maintaining the 5.6L V8 engine, including recommended service intervals, common maintenance tasks, and tips for ensuring long-term reliability. Learn how to keep the engine running smoothly for years to come.
Service Intervals
- Oil change every 5,000 miles or 6 months
- Spark plug replacement every 60,000 miles
- Timing chain designed for lifetime use
- Coolant flush every 30,000 miles
- Air filter replacement every 15,000 miles
- Regular inspection of belts and hoses
Common Maintenance Tasks
- Check and replace engine oil and filter
- Inspect and clean throttle body
- Monitor and top off coolant levels
- Inspect and replace serpentine belt as needed
- Check and adjust valve clearance
- Perform regular diagnostic scans for error codes
Search Specifications
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Engine Specifications
Overview
- Type
- Naturally aspirated V8
- Configuration
- 90-degree V8
- Displacement
- 5.6 liters (5552 cc)
- Fuel System
- Sequential multi-port fuel injection
- Location
- Front longitudinal
- Valvetrain
- DOHC, 4 valves per cylinder
Dimensions
- Length
- 29.5 inches (749 mm)
- Width
- 27.6 inches (701 mm)
- Height
- 28.3 inches (719 mm)
- Weight
- 520 lbs (236 kg)
- Bore
- 3.78 inches (96 mm)
- Stroke
- 3.62 inches (92 mm)
- Compression Ratio
- 9.8:1
- Oil Capacity
- 6.9 quarts (6.5 liters)
Materials
- Block
- Cast aluminum
- Cylinder Heads
- Aluminum alloy
- Pistons
- Forged aluminum
- Crankshaft
- Forged steel
- Valves
- Stainless steel
Features
- Performance
-
- 315 horsepower @ 4900 rpm
- 393 lb-ft torque @ 3600 rpm
- Variable Valve Event and Lift (VVEL)
- Dual exhaust system
- Efficiency
-
- Electronic throttle control
- Optimized airflow design
- Low-friction components
- Advanced ignition timing
- Cooling
-
- High-capacity radiator
- Dual electric cooling fans
- Oil cooler integrated
- Thermostatically controlled
- Ignition
-
- Direct ignition system
- Platinum-tipped spark plugs
- Coil-on-plug design
- Knock sensor feedback
- Emissions
-
- LEV-II compliant
- Dual catalytic converters
- EGR system
- OBD-II diagnostics
Safety Features
- Engine Protection
-
- Low oil pressure shutdown
- Overheat protection
- Fail-safe cooling mode
- Electronic Controls
-
- Traction control integration
- Stability control integration
- Throttle-by-wire safety
Comfort Features
- Noise Reduction
-
- Acoustic engine cover
- Hydraulic engine mounts
- Tuned intake silencer
- Vibration Control
-
- Balanced rotating assembly
- Dual-mass flywheel
- Isolated fuel rail
- Driveability
-
- Smooth power delivery
- Linear throttle response
- Adaptive transmission control
Accessories
- Belts And Pulleys
-
- Serpentine belt
- Tensioner pulley
- Idler pulley
- Filters
-
- High-flow air filter
- Oil filter
- Fuel filter
- Sensors
-
- Crankshaft position sensor
- Camshaft position sensor
- Knock sensor
- Oxygen sensors
Maintenance
- Service interval
- Every 7,500 miles or 6 months
- Service Items
-
- Oil and filter change
- Air filter inspection
- Spark plug inspection
- Belt tension check
- Coolant level check
- PCV valve inspection
- Maintenance Notes
- Use only 5W-30 synthetic oil. Timing chain does not require regular replacement.
Warranty
- Basic
- Miles: 60,000Years: 4Coverage: Bumper-to-bumper
- Powertrain
- Miles: 100,000Years: 6Coverage: Engine and transmission
- Emissions
- Miles: 80,000Years: 8Coverage: Catalytic converter and ECU
- Corrosion
- Miles: UnlimitedYears: 7Coverage: Perforation only
Production Details
- Manufacturer
- Nissan Motor Corporation
- Manufacturing Process
-
- Precision CNC machining
- Automated assembly
- Laser-guided alignment
- Quality Control
- Testing: Cold start testing, Dyno performance testing, Leak testinginspection: Dimensional verification, Material hardness testing, Surface finish analysis
- Sustainability Practices
-
- Recycled aluminum usage
- Low-VOC coatings
- Energy-efficient manufacturing
- Production Metrics
- Units Per Day: 150Defect Rate: 0.02%Energy Consumption: 15 kWh per unit
Service Information for 5.6l v8 engine Service
Maintenance and service requirements specific to this component
- Oil and filter change
- Inspect air filter
- Check spark plugs
- Inspect belts and hoses
- Check fluid levels
- Inspect PCV valve
Use only manufacturer-recommended synthetic oil
- Replace air filter
- Inspect fuel system
- Check ignition system
- Inspect cooling system
- Test battery and charging system
- Inspect exhaust system
Perform complete system diagnostics
- Replace spark plugs
- Replace fuel filter
- Flush cooling system
- Inspect timing chain
- Check engine mounts
- Perform compression test
Major service interval - requires specialized tools
Common Questions
Find answers to common questions about torque specifications
Q1 Is the 5.6L V8 engine compatible with other Infiniti models?
Is the 5.6L V8 engine compatible with other Infiniti models?
The 5.6L V8 engine is specifically designed for the 2004-2010 Infiniti QX56 and is not directly compatible with other Infiniti models without significant modifications. It features a 32-valve DOHC design, producing 320 horsepower and 393 lb-ft of torque. Always verify compatibility with your vehicle's VIN and consult a professional before attempting any cross-model installations.
Q2 What are the maintenance requirements for the 5.6L V8 engine?
What are the maintenance requirements for the 5.6L V8 engine?
Regular maintenance for the 5.6L V8 engine includes oil changes every 5,000 miles, air filter replacement every 15,000 miles, and spark plug replacement every 60,000 miles. Additionally, inspect the timing belt, coolant, and transmission fluid periodically. Adhering to the manufacturer’s maintenance schedule ensures optimal performance and longevity of the engine.
Q3 How do I replace the 5.6L V8 engine in my Infiniti QX56?
How do I replace the 5.6L V8 engine in my Infiniti QX56?
Replacing the 5.6L V8 engine requires professional expertise. Begin by disconnecting the battery, draining fluids, and removing components like the intake manifold, exhaust system, and wiring harness. Use an engine hoist to lift the old engine out and carefully install the new one. Reconnect all components, refill fluids, and test the engine. Always refer to the service manual for detailed instructions.
Q4 What should I do if my 5.6L V8 engine is overheating?
What should I do if my 5.6L V8 engine is overheating?
If your engine is overheating, first check the coolant level and inspect for leaks. Ensure the radiator fan is functioning and the thermostat is not stuck. If the issue persists, it could indicate a failing water pump or a clogged radiator. Use an OBD-II scanner to check for error codes and consult a mechanic for further diagnostics.
Q5 How can I optimize the performance of my 5.6L V8 engine?
How can I optimize the performance of my 5.6L V8 engine?
To optimize performance, use high-quality synthetic oil and premium fuel. Regularly clean the throttle body and replace the air filter. Consider upgrading the exhaust system and air intake for better airflow. Tuning the ECU can also enhance horsepower and torque. Always ensure modifications comply with local regulations and do not void your warranty.
Factory Service Resources
Access official service manuals, technical documents, and repair guides. These resources provide detailed procedures, specifications, and diagrams directly from the manufacturer.
Infiniti QX56 5.6L V8 Engine Service Manual
Coming SoonDetailed service manual covering engine maintenance, repair procedures, and technical specifications for the 2004-2010 Infiniti QX56.
Technical Service Bulletin: Engine Performance Update
Coming SoonThis bulletin addresses common performance issues and provides updates for the 5.6L V8 engine in the 2004-2010 Infiniti QX56.
Infiniti QX56 Parts and Accessories Catalog
Coming SoonComprehensive catalog listing OEM and aftermarket parts for the 2004-2010 Infiniti QX56, including engine components and accessories.
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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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