Infiniti Q45 2002-2006 4.5L V8 Engine Specifications
Explore detailed specifications for the 4.5L V8 engine in the 2002-2006 Infiniti Q45. Includes performance metrics, maintenance details, and technical data for enthusiasts and mechanics.
Overview Specifications
This document provides detailed specifications and technical information about the 4.5L V8 engine used in the 2002-2006 Infiniti Q45. It is designed for enthusiasts, mechanics, and anyone interested in understanding the engine's performance, design, and maintenance. Use the search and navigation instructions to quickly find specific details or explore the sections for comprehensive insights.
How to Use
Use the search functionality by entering keywords related to the engine specifications, such as 'horsepower' or 'torque'. This will highlight relevant sections and subsections for quick access.
Navigate through the document by scrolling through the sections or using the table of contents. Each section is organized into subsections with detailed technical points for easy reference.
Key Specifications
Horsepower
340 hp
Torque
333 lb-ft
Displacement
4.5L
Compression Ratio
10.5:1
0-60 mph
5.9 seconds
Available Specifications
Engine Performance
This section covers the performance metrics of the 4.5L V8 engine, including horsepower, torque, and acceleration. It also includes details on fuel efficiency and emissions.
Engine Performance
This section covers the performance metrics of the 4.5L V8 engine, including horsepower, torque, and acceleration. It also includes details on fuel efficiency and emissions.
Power Output
- Horsepower: 340 hp @ 6400 rpm
- Torque: 333 lb-ft @ 4000 rpm
- Redline: 6800 rpm
- Compression ratio: 10.5:1
- Fuel delivery: Sequential multi-port fuel injection
- Acceleration (0-60 mph): 5.9 seconds
Fuel Efficiency
- City MPG: 17
- Highway MPG: 23
- Combined MPG: 19
- Fuel tank capacity: 20.1 gallons
- Emission standards: LEV (Low Emission Vehicle)
Engine Design
This section delves into the design and construction of the 4.5L V8 engine, including its block, cylinder heads, and valvetrain. It also highlights the materials used and engineering innovations.
Engine Design
This section delves into the design and construction of the 4.5L V8 engine, including its block, cylinder heads, and valvetrain. It also highlights the materials used and engineering innovations.
Block and Cylinder Heads
- Engine type: Naturally aspirated V8
- Displacement: 4494 cc (4.5L)
- Bore x Stroke: 93 mm x 82.7 mm
- Block material: Aluminum
- Cylinder head material: Aluminum
- Valvetrain: DOHC, 4 valves per cylinder
Cooling and Lubrication
- Cooling system: Liquid-cooled
- Oil capacity: 6.3 quarts (with filter)
- Oil type: 5W-30 synthetic
- Coolant capacity: 10.6 quarts
Maintenance and Durability
This section provides information on maintenance schedules, common issues, and the durability of the 4.5L V8 engine. It includes tips for prolonging engine life and ensuring optimal performance.
Maintenance and Durability
This section provides information on maintenance schedules, common issues, and the durability of the 4.5L V8 engine. It includes tips for prolonging engine life and ensuring optimal performance.
Maintenance Schedule
- Oil change interval: Every 5,000 miles
- Spark plug replacement: Every 60,000 miles
- Timing belt: Not applicable (chain-driven)
- Coolant flush: Every 30,000 miles
- Air filter replacement: Every 15,000 miles
Common Issues
- Oil leaks from valve covers
- Throttle body failure
- Ignition coil issues
- Carbon buildup on intake valves
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Engine Specifications
Overview
- Type
- Naturally aspirated V8
- Configuration
- 90-degree V8
- Displacement
- 4.5 liters (4494 cc)
- Valvetrain
- DOHC, 4 valves per cylinder
- Fuel System
- Sequential multi-port fuel injection
- Location
- Front longitudinal
Dimensions
- Length
- 28.5 inches (724 mm)
- Width
- 27.6 inches (701 mm)
- Height
- 26.8 inches (681 mm)
- Weight
- 440 lbs (200 kg)
- Bore
- 3.78 inches (96 mm)
- Stroke
- 3.27 inches (83 mm)
- Compression Ratio
- 10.5:1
- Oil Capacity
- 6.3 quarts (6.0 liters)
Materials
- Block
- Aluminum alloy
- Cylinder Heads
- Aluminum alloy
- Pistons
- Forged aluminum
- Crankshaft
- Forged steel
- Valves
- Stainless steel
Features
- Performance
-
- 340 horsepower @ 6400 rpm
- 333 lb-ft torque @ 4000 rpm
- Redline at 6800 rpm
- Variable Valve Timing (VVT)
- Efficiency
-
- Optimized airflow design
- Low-friction components
- Electronic throttle control
- High-efficiency combustion
- Cooling
-
- High-capacity radiator
- Dual electric cooling fans
- Oil cooler integrated
- Thermostatically controlled
- Ignition
-
- Direct ignition system
- Platinum-tipped spark plugs
- Individual coil-on-plug design
- Knock control system
- Exhaust
-
- Dual exhaust system
- Stainless steel headers
- Catalytic converters
- Resonator for noise reduction
Safety Features
- Engine Protection
-
- Low oil pressure warning
- Overheat protection
- Fail-safe cooling mode
- Emissions
-
- OBD-II compliant
- LEV (Low Emission Vehicle) certified
- Catalytic converter monitoring
- Electrical
-
- Short-circuit protection
- Overvoltage protection
- Fused circuits
Comfort Features
- Noise Reduction
-
- Acoustic engine cover
- Hydraulic engine mounts
- Balanced rotating assembly
- Vibration Control
-
- Counter-rotating balance shafts
- Precision-machined components
- Dampened pulley system
- Driveability
-
- Smooth power delivery
- Linear throttle response
- Adaptive transmission tuning
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
- Spark plug inspection
- Air filter replacement
- Timing belt inspection
- Coolant flush
- Throttle body cleaning
- Maintenance Notes
- Use synthetic 5W-30 oil for optimal performance. Timing belt replacement recommended at 105,000 miles.
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 sensors
- Corrosion
- Miles: UnlimitedYears: 7Coverage: Perforation from rust
Production Details
- Manufacturer
- Nissan Motor Co., Ltd.
- Manufacturing Process
-
- Precision CNC machining
- Automated assembly line
- Laser-guided alignment
- Quality Control
- inspection Stages: Dimensional accuracy, Leak testing, Dyno testingTolerances: Within 0.001 inches (0.025 mm)
- 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 engine
Service Information for 4.5l v8 engine Service
Maintenance and service requirements specific to this component
- Oil and filter change
- Inspect spark plugs
- Check air filter
- Inspect belts and hoses
- Check fluid levels
Use only synthetic 5W-30 oil for optimal performance.
- Replace air filter
- Inspect fuel system
- Check ignition system
- Inspect exhaust system
- Test emissions system
Ensure all sensors are functioning properly.
- Replace timing belt
- Replace water pump
- Flush cooling system
- Inspect valve clearance
- Replace accessory belts
Critical to replace timing belt to prevent engine damage.
Common Questions
Find answers to common questions about torque specifications
Q1 Is the 4.5L V8 engine compatible with other Infiniti models?
Is the 4.5L V8 engine compatible with other Infiniti models?
The 4.5L V8 engine, specifically the VK45DE, was designed for the 2002-2006 Infiniti Q45 and is not directly compatible with other Infiniti models without significant modifications. It features a DOHC configuration, 32 valves, and produces 340 horsepower. Compatibility depends on the vehicle's chassis, wiring, and ECU systems. Always verify with a professional before attempting cross-model installations.
Q2 What are the maintenance requirements for the 4.5L V8 engine?
What are the maintenance requirements for the 4.5L V8 engine?
The 4.5L V8 engine requires regular maintenance to ensure optimal performance. Key tasks include oil changes every 5,000 miles, timing belt replacement every 60,000-90,000 miles, and spark plug replacement every 30,000 miles. Regularly inspect the cooling system, air filters, and fuel injectors. Adhering to the manufacturer's maintenance schedule is crucial for longevity and reliability.
Q3 How do I replace the 4.5L V8 engine in a 2002-2006 Infiniti Q45?
How do I replace the 4.5L V8 engine in a 2002-2006 Infiniti Q45?
Replacing the 4.5L V8 engine involves several steps: disconnect the battery, drain fluids, remove the intake manifold, exhaust system, and accessories. Unbolt the engine mounts and transmission connections, then carefully lift the engine out. Install the new engine by reversing the process, ensuring proper alignment and torque specifications. Use a service manual for detailed instructions and torque values.
Q4 What are common troubleshooting steps for the 4.5L V8 engine?
What are common troubleshooting steps for the 4.5L V8 engine?
Common issues include rough idling, reduced power, and overheating. Start by checking the ignition system, including spark plugs and coils. Inspect the fuel system for clogged injectors or a failing fuel pump. Verify the cooling system for leaks or a malfunctioning thermostat. Use an OBD-II scanner to identify error codes and address them accordingly.
Q5 How can I optimize the performance of the 4.5L V8 engine?
How can I optimize the performance of the 4.5L V8 engine?
To optimize performance, consider upgrading the air intake and exhaust systems for better airflow. Use high-quality synthetic oil and ensure proper engine tuning. Regularly clean the throttle body and fuel injectors. For advanced performance, consider ECU remapping or installing a performance chip. Always balance upgrades with proper maintenance to avoid engine strain.
Factory Service Resources
Access official service manuals, technical documents, and repair guides. These resources provide detailed procedures, specifications, and diagrams directly from the manufacturer.
2002-2006 Infiniti Q45 Service Manual
Coming SoonComprehensive guide covering maintenance, repair, and troubleshooting for the 4.5L V8 engine and related systems.
Technical Service Bulletin for VK45DE Engine
Coming SoonDetails common issues, updates, and fixes for the 4.5L V8 engine as identified by Infiniti.
Infiniti Q45 Parts and Accessories Catalog
Coming SoonLists OEM and aftermarket parts compatible with the 2002-2006 Infiniti Q45, 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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