Mercedes-Benz Mercedes G-Class 1979-2018 4.0L V8 Engine Specifications
Explore the detailed 4.0L V8 engine specifications for the 1979-2018 Mercedes G-Class. This guide covers horsepower, torque, fuel system, and more, providing essential insights for maintenance, repair, and upgrades.
Overview Specifications
This document provides detailed specifications and technical information about the 4.0L V8 engine used in the Mercedes G-Class from 1979 to 2018. It is designed for enthusiasts, mechanics, and researchers seeking comprehensive data on the engine's performance, design, and evolution. Use the search and navigation instructions to quickly find specific details or explore sections for a deeper understanding of the engine's features.
How to Use
Use the search bar to enter keywords related to the 4.0L V8 engine, such as 'horsepower' or 'torque'. Results will highlight relevant sections and subsections for quick access.
Scroll through the document or use the table of contents to jump to major sections. Each section contains subsections with detailed technical points for easy reference.
Key Specifications
Displacement
4.0L
Horsepower
416 hp
Torque
450 lb-ft
0-60 mph
5.6 seconds
Fuel Economy
15 mpg city / 20 mpg highway
Available Specifications
Engine Design and Architecture
This section covers the fundamental design principles and architectural features of the 4.0L V8 engine. It includes details on the engine's construction, materials, and layout, providing insights into its durability and performance capabilities.
Engine Design and Architecture
This section covers the fundamental design principles and architectural features of the 4.0L V8 engine. It includes details on the engine's construction, materials, and layout, providing insights into its durability and performance capabilities.
Cylinder Configuration
- 90-degree V8 configuration
- Aluminum alloy block and heads
- Dual overhead camshafts (DOHC)
- 32-valve setup for optimal airflow
- Forged steel crankshaft for enhanced strength
- Cross-bolted main bearing caps
Fuel and Ignition System
- Direct fuel injection system
- Multi-spark ignition technology
- Variable valve timing (VVT)
- High-pressure fuel pump
- Electronic throttle control
- Knock sensors for optimized combustion
Performance Specifications
This section outlines the performance metrics of the 4.0L V8 engine, including horsepower, torque, and acceleration figures. It also highlights the engine's efficiency and power delivery across different RPM ranges.
Performance Specifications
This section outlines the performance metrics of the 4.0L V8 engine, including horsepower, torque, and acceleration figures. It also highlights the engine's efficiency and power delivery across different RPM ranges.
Power Output
- Horsepower: 416 hp at 5,500 rpm
- Torque: 450 lb-ft at 2,000-4,750 rpm
- 0-60 mph acceleration: 5.6 seconds
- Top speed: 130 mph (electronically limited)
- Redline: 6,500 rpm
- Power-to-weight ratio: 9.5 lbs/hp
Efficiency and Emissions
- Fuel economy: 15 mpg city / 20 mpg highway
- CO2 emissions: 350 g/km
- Start-stop technology for reduced idling
- Euro 6 emissions compliance
- Low-friction components for improved efficiency
- Adaptive engine mapping for varying conditions
Evolution Over the Years
This section traces the development and improvements made to the 4.0L V8 engine from its introduction in 1979 to its final iteration in 2018. It highlights key upgrades, technological advancements, and changes in performance.
Evolution Over the Years
This section traces the development and improvements made to the 4.0L V8 engine from its introduction in 1979 to its final iteration in 2018. It highlights key upgrades, technological advancements, and changes in performance.
Early Models (1979-1990)
- Initial displacement: 4.0L
- Carbureted fuel system
- Cast iron block for durability
- Single overhead camshaft (SOHC)
- Horsepower: 200 hp
- Torque: 250 lb-ft
Mid-Generation Upgrades (1991-2005)
- Introduction of electronic fuel injection
- Aluminum block for weight reduction
- Dual overhead camshafts (DOHC)
- Horsepower increased to 300 hp
- Torque increased to 350 lb-ft
- Improved cooling system
Modern Era (2006-2018)
- Direct fuel injection system
- Variable valve timing (VVT)
- Horsepower: 416 hp
- Torque: 450 lb-ft
- Advanced engine management system
- Lightweight materials for enhanced performance
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Engine Specifications
Overview
- Type
- V8 gasoline engine
- Configuration
- 90-degree V8
- Displacement
- 4.0 liters (3982 cc)
- Aspiration
- Twin-turbocharged
- Material
- Aluminum block and heads
- Location
- Front longitudinal
Dimensions
- Length
- 28.5 inches (724 mm)
- Width
- 30.7 inches (780 mm)
- Height
- 27.6 inches (701 mm)
- Weight
- 440 lbs (200 kg)
- Bore
- 3.86 inches (98 mm)
- Stroke
- 3.27 inches (83 mm)
- Compression Ratio
- 10.5:1
- Oil Capacity
- 8.5 quarts (8 liters)
Materials
- Engine Block
- Aluminum-silicon alloy
- Cylinder Heads
- Aluminum with integrated exhaust manifolds
- Pistons
- Forged aluminum
- Connecting Rods
- Forged steel
- Crankshaft
- Forged steel with eight counterweights
Features
- Performance
-
- Direct fuel injection
- Twin-scroll turbochargers
- Variable valve timing
- Start-stop technology
- Cooling
-
- Dual-circuit cooling system
- Electric water pump
- Thermostatically controlled oil cooler
- Ignition
-
- Coil-on-plug ignition
- Adaptive ignition timing
- Knock control system
- Lubrication
-
- Dry-sump oil system
- Variable displacement oil pump
- Oil level sensor
- Emissions
-
- Integrated catalytic converters
- Secondary air injection
- Exhaust gas recirculation
Safety Features
- Engine Protection
-
- Over-rev protection
- Over-temperature shutdown
- Low oil pressure warning
- Fire Prevention
-
- Fuel cut-off in crash
- Heat shielding
- Flame arrestor in intake
Comfort Features
- Noise Reduction
-
- Acoustic engine cover
- Hydraulic engine mounts
- Tuned intake silencers
- Vibration Control
-
- Balanced crankshaft
- Dual-mass flywheel
- Active engine mounts
Accessories
- Engine Bay
-
- Polished aluminum covers
- Integrated air filter housing
- Dual-battery system
- Cooling System
-
- Auxiliary electric fan
- High-capacity radiator
- Transmission oil cooler
- Exhaust System
-
- Stainless steel headers
- Dual exhaust with valves
- Integrated particulate filter
Maintenance
- Service interval
- 10,000 miles or 12 months
- Service Items
-
- Oil and filter change
- Spark plug replacement
- Air filter inspection
- Belt tension check
- Coolant level check
- Maintenance Notes
- Use only Mercedes-approved synthetic oil and filters
Warranty
- Basic
- Years: 4Miles: 50000Coverage: Bumper-to-bumper
- Powertrain
- Years: 6Miles: 70000Coverage: Engine and transmission
- Corrosion
- Years: 12Miles: UnlimitedCoverage: Perforation only
- Roadside Assistance
- Years: 4Miles: UnlimitedCoverage: 24/7 assistance
Production Details
- Manufacturer
- Mercedes-AMG GmbH
- Manufacturing Process
-
- Casting of engine block
- CNC machining of components
- Hand-built assembly
- Dyno testing
- Quality Control
- Dimensional Checks: Laser measurementPressure Testing: Cylinder leak-downPerformance Validation: Dyno testing
- Sustainability
-
- Recycled aluminum content
- Low-emission painting process
- Energy-efficient manufacturing
- Production Metrics
- Units Per Day: 50Build Time: 6.5 hours per engineReject Rate: 0.2%
Service Information for 4.0l v8 engine Service
Maintenance and service requirements specific to this component
- Oil and filter change
- Air filter inspection
- Spark plug inspection
- Belt tension check
- Coolant level check
Use only Mercedes-approved synthetic oil 0W-40
- Replace spark plugs
- Replace air filter
- Inspect fuel injectors
- Check turbocharger condition
- Test ignition coils
Requires special spark plug socket tool
- Replace timing chain
- Replace water pump
- Flush cooling system
- Replace engine mounts
- Perform compression test
Major service requires engine hoist and special tools
Common Questions
Find answers to common questions about torque specifications
Q1 Is the 4.0L V8 engine compatible with all Mercedes G-Class models from 1979 to 2018?
Is the 4.0L V8 engine compatible with all Mercedes G-Class models from 1979 to 2018?
The 4.0L V8 engine is not compatible with all G-Class models from 1979 to 2018. It was introduced in later models, specifically from 2015 onwards. Earlier models may require significant modifications for compatibility. Always verify the engine code and consult a Mercedes-Benz technician to ensure proper fitment and avoid potential issues.
Q2 What are the maintenance requirements for the 4.0L V8 engine in the G-Class?
What are the maintenance requirements for the 4.0L V8 engine in the G-Class?
The 4.0L V8 engine requires regular maintenance, including oil changes every 10,000 miles or annually, air filter replacement every 30,000 miles, and spark plug replacement every 60,000 miles. Additionally, inspect the timing chain and cooling system periodically. Adhering to the manufacturer’s maintenance schedule ensures optimal performance and longevity.
Q3 How do I replace the 4.0L V8 engine in a Mercedes G-Class?
How do I replace the 4.0L V8 engine in a Mercedes G-Class?
Replacing the 4.0L V8 engine involves disconnecting the battery, draining fluids, and removing components like the intake manifold, exhaust system, and wiring harness. Use a hoist to lift the engine out and install the new one in reverse order. Ensure proper torque specifications and alignment. Professional installation is recommended for precision and safety.
Q4 What are common troubleshooting steps for the 4.0L V8 engine?
What are common troubleshooting steps for the 4.0L V8 engine?
Common issues include rough idling, reduced power, or check engine lights. Start by scanning for error codes using an OBD-II scanner. Check for vacuum leaks, faulty sensors, or clogged fuel injectors. Inspect the ignition system and ensure proper fuel pressure. Regular diagnostics and timely repairs can prevent major engine problems.
Q5 How can I optimize the performance of the 4.0L V8 engine?
How can I optimize the performance of the 4.0L V8 engine?
To optimize performance, use high-quality synthetic oil, upgrade the air intake and exhaust systems, and consider a performance tune. Regularly clean fuel injectors and replace worn components. Ensure proper tire pressure and alignment for better drivability. Avoid aggressive driving to maintain engine health and efficiency.
Factory Service Resources
Access official service manuals, technical documents, and repair guides. These resources provide detailed procedures, specifications, and diagrams directly from the manufacturer.
Mercedes-Benz G-Class Service Manual (2015-2018)
Coming SoonComprehensive guide covering maintenance, repairs, and technical specifications for the 4.0L V8 engine in G-Class models.
Technical Service Bulletin: 4.0L V8 Engine Updates
Coming SoonDetails software updates and common fixes for the 4.0L V8 engine in Mercedes G-Class vehicles.
G-Class Parts and Accessories Catalog
Coming SoonCatalog listing OEM and aftermarket parts for the 4.0L V8 engine and related 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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