Lexus GX 2003-2009 4.7L V8 Engine Specifications
Explore the detailed 4.7L V8 engine specifications for the 2003-2009 Lexus GX 470. Learn about horsepower, torque, fuel system, and more for performance optimization and maintenance.
Overview Specifications
This document provides detailed specifications and technical information about the 4.7L V8 engine used in the 2003-2009 Lexus GX. It is designed to assist enthusiasts, mechanics, and owners in understanding the engine's features, performance, and maintenance requirements. The content is organized into sections for easy navigation, with subsections breaking down key aspects of the engine. Use the search and navigation instructions to quickly find the information you need.
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Key Specifications
Displacement
4.7 liters
Horsepower
263 HP
Torque
323 lb-ft
Fuel Efficiency
15 MPG city / 20 MPG highway
Emissions
ULEV compliant
Available Specifications
Engine Performance
This section covers the performance characteristics of the 4.7L V8 engine, including horsepower, torque, and acceleration. It also includes details on fuel efficiency and emissions.
Engine Performance
This section covers the performance characteristics of the 4.7L V8 engine, including horsepower, torque, and acceleration. It also includes details on fuel efficiency and emissions.
Horsepower and Torque
- 263 horsepower at 5,400 RPM
- 323 lb-ft of torque at 3,400 RPM
- Dual overhead camshaft (DOHC) design
- Variable Valve Timing with intelligence (VVT-i)
- Optimized for smooth power delivery
- High-performance intake and exhaust systems
Fuel Efficiency and Emissions
- EPA-estimated 15 MPG city / 20 MPG highway
- Meets ULEV (Ultra Low Emission Vehicle) standards
- Electronic throttle control system
- Advanced fuel injection technology
- Designed for reduced environmental impact
- Compatible with regular unleaded gasoline
Engine Design
This section explores the design and construction of the 4.7L V8 engine, including its materials, layout, and cooling systems. It also highlights key engineering features.
Engine Design
This section explores the design and construction of the 4.7L V8 engine, including its materials, layout, and cooling systems. It also highlights key engineering features.
Construction and Materials
- Aluminum alloy cylinder heads
- Cast iron engine block for durability
- Forged steel crankshaft
- Lightweight pistons with low friction coatings
- High-strength connecting rods
- Precision-machined components for reliability
Cooling and Lubrication
- High-capacity radiator for efficient cooling
- Dual electric cooling fans
- Oil cooler integrated into the engine
- Full-flow oil filtration system
- Synthetic oil recommended for optimal performance
- Thermostatically controlled cooling system
Maintenance and Durability
This section provides information on maintaining the 4.7L V8 engine, including recommended service intervals, common issues, and tips for ensuring longevity.
Maintenance and Durability
This section provides information on maintaining the 4.7L V8 engine, including recommended service intervals, common issues, and tips for ensuring longevity.
Service Intervals
- Oil change every 5,000 miles or 6 months
- Spark plug replacement every 60,000 miles
- Timing belt inspection at 90,000 miles
- Coolant flush every 100,000 miles
- Air filter replacement every 30,000 miles
- Regular inspection of belts and hoses
Common Issues and Solutions
- Check engine light due to oxygen sensor faults
- Oil leaks from valve cover gaskets
- Timing belt wear over time
- Coolant leaks from water pump
- Regular cleaning of throttle body recommended
- Use of high-quality parts for repairs
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Engine Specifications
Overview
- Type
- Naturally aspirated V8
- Configuration
- 90-degree V8
- Displacement
- 4.7 liters (4664 cc)
- Valvetrain
- DOHC, 32-valve
- Fuel System
- Sequential multi-port fuel injection
- Location
- Front longitudinal
Dimensions
- Length
- 28.5 inches (724 mm)
- Width
- 26.8 inches (681 mm)
- Height
- 27.6 inches (701 mm)
- Weight
- 450 lbs (204 kg)
- Bore
- 3.70 inches (94 mm)
- Stroke
- 3.27 inches (83 mm)
- Compression Ratio
- 10.0:1
Materials
- Block
- Cast iron with aluminum alloy
- Cylinder Heads
- Aluminum alloy
- Pistons
- Forged aluminum
- Crankshaft
- Forged steel
- Valves
- Stainless steel
Features
- Performance
-
- 270-288 horsepower
- 310-320 lb-ft torque
- Dual Variable Valve Timing with intelligence (VVT-i)
- High-flow intake manifold
- Efficiency
-
- Optimized combustion chamber design
- Low-friction piston rings
- Electronic throttle control
- Efficient cooling system
- Durability
-
- Forged internals for high strength
- Long-life timing chain
- Robust oiling system
- Thermal management system
- Technology
-
- Drive-by-wire throttle system
- Integrated knock control
- Advanced engine management system
- Self-diagnostic capabilities
Safety Features
- Engine Protection
-
- Oil pressure warning system
- Coolant temperature sensor
- Over-rev limiter
- Emissions
-
- Low-emission design
- Integrated catalytic converters
- OBD-II compliance
Comfort Features
- Noise Reduction
-
- Acoustic engine cover
- Balanced rotating assembly
- Hydraulic engine mounts
- Smoothness
-
- Dual counter-rotating balance shafts
- Precision-machined components
- Optimized firing order
Accessories
- Cooling
-
- High-capacity radiator
- Electric cooling fan
- Auxiliary transmission cooler
- Electrical
-
- High-output alternator
- Maintenance-free battery
- Integrated starter system
- intake Exhaust
-
- High-flow air filter
- Stainless steel exhaust manifold
- Dual exhaust system
Maintenance
- Service interval
- Every 5,000 miles or 6 months
- Service Items
-
- Oil and filter change
- Spark plug inspection
- Air filter replacement
- Timing chain inspection
- Coolant flush
- Belt and hose inspection
- Maintenance Notes
- Use synthetic oil for optimal performance. Follow severe duty schedule for towing or off-road use.
Warranty
- Basic
- Miles: 50,000Years: 4Coverage: Bumper-to-bumper
- Powertrain
- Miles: 70,000Years: 6Coverage: Engine, transmission, drivetrain
- Emissions
- Miles: 80,000Years: 8Coverage: Catalytic converter, ECU, sensors
- Corrosion
- Miles: UnlimitedYears: 6Coverage: Perforation from rust
Production Details
- Manufacturer
- Toyota Motor Corporation
- Manufacturing Process
-
- Precision casting for block and heads
- CNC machining for critical components
- Robotic assembly for consistency
- Quality Control
- Testing: Dyno testing for performance, Leak testing for cooling system, Vibration analysisStandards: ISO 9001 certified, Toyota Production System (TPS), Zero-defect philosophy
- Sustainability
-
- Recyclable materials used
- Low-emission manufacturing
- Energy-efficient production lines
- Production Metrics
- Units Per Year: Approximately 50,000Production Sites: Tahara Plant, Japan, Toyota City, Japan
Service Information for 4.7l v8 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 for leaks
Use 5W-30 synthetic oil for optimal performance.
- Replace air filter
- Inspect spark plugs
- Check fuel system
- Inspect timing chain
- Test battery and charging system
Replace spark plugs with OEM iridium plugs if necessary.
- Replace timing chain and tensioner
- Flush cooling system
- Replace drive belts
- Inspect and clean throttle body
- Perform compression test
Major service interval; requires specialized tools and expertise.
Common Questions
Find answers to common questions about torque specifications
Q1 Is the 4.7L V8 engine compatible with other Lexus models?
Is the 4.7L V8 engine compatible with other Lexus models?
The 4.7L V8 engine, found in the 2003-2009 Lexus GX, is primarily designed for this model. While it shares similarities with engines in the Toyota Land Cruiser and Lexus LX 470, compatibility with other models depends on specific configurations, such as mounting points, electronics, and transmission systems. Always consult a professional or refer to the manufacturer's documentation before attempting cross-model compatibility.
Q2 What are the maintenance requirements for the 4.7L V8 engine?
What are the maintenance requirements for the 4.7L V8 engine?
The 4.7L V8 engine requires regular maintenance to ensure optimal performance. Key tasks include oil changes every 5,000-7,500 miles, air filter replacement every 15,000 miles, and spark plug replacement every 60,000 miles. Additionally, inspect the timing belt every 90,000 miles and replace it if necessary. Regular coolant flushes and fuel system cleanings are also recommended to maintain engine efficiency and longevity.
Q3 How do I replace the 4.7L V8 engine in a Lexus GX?
How do I replace the 4.7L V8 engine in a Lexus GX?
Replacing the 4.7L V8 engine involves several steps: 1) Disconnect the battery and drain fluids. 2) Remove components like the air intake, exhaust manifold, and wiring harness. 3) Support the engine with a hoist and detach it from the transmission and mounts. 4) Install the new engine by reversing the steps, ensuring proper alignment and torque specifications. Always refer to the service manual for detailed instructions and safety precautions.
Q4 What should I do if my 4.7L V8 engine is overheating?
What should I do if my 4.7L V8 engine is overheating?
If your 4.7L V8 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, inspect the water pump and radiator for blockages or damage. Use an OBD-II scanner to check for error codes. If no obvious issues are found, consult a professional mechanic for further diagnosis.
Q5 How can I optimize the performance of my 4.7L V8 engine?
How can I optimize the performance of my 4.7L V8 engine?
To optimize the 4.7L V8 engine's performance, use high-quality synthetic oil and premium fuel. Regularly clean or replace air filters and ensure the throttle body is free of carbon buildup. Consider upgrading the exhaust system for better airflow and installing a performance chip for improved fuel mapping. Regular tuning and adherence to maintenance schedules are essential for sustained performance.
Factory Service Resources
Access official service manuals, technical documents, and repair guides. These resources provide detailed procedures, specifications, and diagrams directly from the manufacturer.
Lexus GX 470 Service Manual
Coming SoonComprehensive guide covering maintenance, repair, and troubleshooting for the 2003-2009 Lexus GX 470, including the 4.7L V8 engine.
Technical Service Bulletin: Engine Performance Updates
Coming SoonOfficial bulletin detailing updates and fixes for the 4.7L V8 engine, including software updates and component replacements.
Lexus GX 470 Parts Catalog
Coming SoonDetailed catalog of OEM parts and accessories for the 2003-2009 Lexus GX 470, 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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