Infiniti M45 2003-2004 4.5L V8 Engine Specifications
Explore the detailed 4.5L V8 engine specifications for the 2003-2004 Infiniti M45. This guide covers horsepower, torque, fuel system, and more, providing essential information for maintenance, repairs, and performance upgrades.
Overview Specifications
This document provides detailed specifications and technical information about the 4.5L V8 engine used in the 2003-2004 Infiniti M45. 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
4.5 liters
Horsepower
340 HP @ 6,400 RPM
Torque
333 lb-ft @ 4,000 RPM
Fuel Efficiency
17 MPG city / 23 MPG highway
Redline
6,800 RPM
Available Specifications
Engine Design
This section covers the fundamental design aspects of the 4.5L V8 engine, including its architecture, materials, and construction. Learn about the engine's layout, cylinder configuration, and advanced engineering features that contribute to its performance and durability.
Engine Design
This section covers the fundamental design aspects of the 4.5L V8 engine, including its architecture, materials, and construction. Learn about the engine's layout, cylinder configuration, and advanced engineering features that contribute to its performance and durability.
Architecture and Layout
- 90-degree V8 configuration
- Aluminum block and cylinder heads
- DOHC (Dual Overhead Camshaft) design
- 32-valve setup for optimal airflow
- Naturally aspirated with multi-point fuel injection
- Compact design for improved weight distribution
Materials and Construction
- High-strength aluminum alloy for reduced weight
- Forged steel crankshaft for durability
- Hypereutectic pistons for thermal efficiency
- Plasma-sprayed cylinder bores for reduced friction
- Integrated oil cooler for thermal management
- Advanced gasket materials for improved sealing
Performance Specifications
Explore the performance capabilities of the 4.5L V8 engine, including its power output, torque, and fuel efficiency. This section provides detailed metrics and explains how the engine delivers a balance of power and refinement.
Performance Specifications
Explore the performance capabilities of the 4.5L V8 engine, including its power output, torque, and fuel efficiency. This section provides detailed metrics and explains how the engine delivers a balance of power and refinement.
Power and Torque
- 340 horsepower at 6,400 RPM
- 333 lb-ft of torque at 4,000 RPM
- Redline at 6,800 RPM
- Broad torque curve for responsive acceleration
- Optimized intake and exhaust systems for performance
- Electronic throttle control for precise power delivery
Fuel Efficiency and Emissions
- EPA-estimated 17 MPG city / 23 MPG highway
- Meets ULEV (Ultra Low Emission Vehicle) standards
- Advanced engine management system for efficiency
- Variable valve timing for optimized combustion
- Low-friction components for reduced energy loss
- Designed for compatibility with premium unleaded fuel
Maintenance and Reliability
This section provides guidance on maintaining the 4.5L V8 engine to ensure long-term reliability and performance. Learn about recommended service intervals, common maintenance tasks, and tips for preserving the engine's condition.
Maintenance and Reliability
This section provides guidance on maintaining the 4.5L V8 engine to ensure long-term reliability and performance. Learn about recommended service intervals, common maintenance tasks, and tips for preserving the engine's condition.
Service Intervals
- Oil change every 5,000 miles or 6 months
- Spark plug replacement every 60,000 miles
- Timing chain inspection at 100,000 miles
- Coolant flush every 30,000 miles
- Air filter replacement every 15,000 miles
- Fuel system cleaning every 30,000 miles
Common Maintenance Tips
- Use synthetic oil for improved lubrication
- Monitor coolant levels to prevent overheating
- Check for oil leaks around gaskets and seals
- Inspect belts and hoses for wear and tear
- Keep the throttle body clean for optimal performance
- Regularly inspect the exhaust system for damage
Search Specifications
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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
- 29.1 inches (740 mm)
- Height
- 26.8 inches (680 mm)
- Weight
- 441 lbs (200 kg)
- Bore
- 3.78 inches (96 mm)
- Stroke
- 3.27 inches (83 mm)
- Compression Ratio
- 10.5:1
Materials
- Block
- Aluminum alloy
- Cylinder Heads
- Aluminum alloy
- Pistons
- Forged aluminum
- Crankshaft
- Forged steel
- Valves
- Titanium intake, steel exhaust
Features
- Performance
-
- 340 horsepower @ 6400 rpm
- 333 lb-ft torque @ 4000 rpm
- Redline at 6800 rpm
- Efficiency
-
- Variable valve timing (VVT)
- Electronic throttle control
- Low-friction piston rings
- Cooling
-
- High-capacity water pump
- Dual electric cooling fans
- Aluminum radiator
- Ignition
-
- Direct ignition system
- Platinum-tipped spark plugs
- Knock control system
- Emissions
-
- Dual catalytic converters
- EGR system
- OBD-II compliant
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 protocols
Comfort Features
- Noise Reduction
-
- Acoustic engine cover
- Hydraulic engine mounts
- Tuned intake silencer
- Vibration Control
-
- Counter-rotating balance shafts
- Dual-mass flywheel
- Precision-machined components
Accessories
- Belts
-
- Serpentine belt
- Timing chain
- Accessory drive belt
- Filters
-
- High-flow air filter
- Oil filter
- Fuel filter
- Sensors
-
- Crankshaft position sensor
- Camshaft position sensor
- Knock sensor
Maintenance
- Service interval
- Every 7,500 miles or 6 months
- Service Items
-
- Oil and filter change
- Spark plug inspection
- Timing chain inspection
- Coolant flush
- Air filter replacement
- Maintenance Notes
- Use synthetic 5W-30 oil, premium fuel recommended
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 testingTolerances: ±0.0001 inch critical components
- Sustainability
-
- Recycled aluminum content
- Low-VOC coatings
- Energy-efficient manufacturing
- Production Metrics
- Units Per Day: 150Defect Rate: 0.01%Energy Use: 15 kWh per engine
Service Information for 4.5l v8 engine Service
Maintenance and service requirements specific to this component
- Oil and filter change
- Tire rotation
- Fluid level checks
- Brake inspection
- Air filter inspection
Use only manufacturer-approved synthetic oil
- Cabin air filter replacement
- Fuel system inspection
- Spark plug inspection
- Coolant system check
- Drive belt inspection
Check for software updates at dealership
- Timing chain inspection
- Transmission fluid change
- Coolant flush
- Fuel filter replacement
- Comprehensive engine diagnostics
Requires specialized diagnostic equipment
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 2003-2004 Infiniti M45 and is not directly compatible with other Infiniti models without significant modifications. It features a 4.5-liter displacement, DOHC, and 32 valves, producing 340 horsepower. Compatibility depends on the vehicle's chassis, wiring, and ECU configurations. Always consult a professional or refer to the service manual 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 3,000-5,000 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 is crucial to prevent engine wear and maintain longevity.
Q3 How do I replace the 4.5L V8 engine in my Infiniti M45?
How do I replace the 4.5L V8 engine in my Infiniti M45?
Replacing the 4.5L V8 engine involves several steps: disconnect the battery, drain fluids, remove the intake manifold, exhaust system, and accessories, and detach the engine mounts. Use a hoist to lift the engine out. Installation is the reverse process, ensuring all connections are secure. Torque specifications must be followed precisely. Refer to the service manual for detailed instructions and safety precautions.
Q4 What should I do if my 4.5L V8 engine is misfiring?
What should I do if my 4.5L V8 engine is misfiring?
Misfiring in the 4.5L V8 engine can result from faulty spark plugs, ignition coils, or fuel injectors. Begin by scanning for error codes using an OBD-II scanner. Inspect and replace spark plugs or ignition coils if necessary. Check fuel injectors for clogs or leaks. If the issue persists, inspect the engine's compression and timing. Consult a professional for advanced diagnostics.
Q5 How can I optimize the performance of my 4.5L V8 engine?
How can I optimize the performance of my 4.5L V8 engine?
To optimize the 4.5L V8 engine's performance, use high-quality synthetic oil and premium fuel. Upgrade the air intake and exhaust systems for better airflow. Regularly clean the throttle body and fuel injectors. Consider a performance tune to enhance horsepower and torque. Ensure the cooling system is efficient to prevent overheating during high-performance driving.
Factory Service Resources
Access official service manuals, technical documents, and repair guides. These resources provide detailed procedures, specifications, and diagrams directly from the manufacturer.
2003-2004 Infiniti M45 Service Manual
Coming SoonComprehensive guide covering maintenance, repair, and troubleshooting for the 4.5L V8 engine and other vehicle components.
Technical Service Bulletin for VK45DE Engine
Coming SoonOfficial bulletin addressing common issues, updates, and fixes for the 4.5L V8 engine in the 2003-2004 Infiniti M45.
Infiniti M45 Parts and Accessories Catalog
Coming SoonDetailed catalog listing OEM and aftermarket parts for the 2003-2004 Infiniti M45, 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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