Types of Mitsubishi 4G64 Engine
The 4G64 engine is a four-cylinder, gasoline-powered internal combustion engine manufactured by Mitsubishi Motors. With a displacement of 2.4 liters (2362 cc), this engine is part of the renowned 4G6 family, which powers numerous Mitsubishi vehicles and models from other manufacturers.
Did you know? The 4G64 engine has been produced since the 1980s and continues to be known for its reliability, moderate fuel consumption, and adaptability to various vehicle types.
4G64 SOHC
Single Overhead Camshaft
Features one camshaft positioned at the top of the cylinder block, controlling both intake and exhaust valves. This design offers:
- Simpler mechanical structure
- Lower production costs
- Easier maintenance procedures
- Greater reliability in certain applications
Best for: Economic operation and straightforward maintenance
4G64 DOHC
Dual Overhead Camshaft
Incorporates two camshafts at the top of the cylinder block, with dedicated camshafts for intake and exhaust valves. This configuration delivers:
- Enhanced power output
- Improved torque delivery
- More precise valve timing
- Better high-RPM performance
Best for: Performance applications requiring additional power
4G64T
Turbocharged Variant
Employs a turbocharger to force additional air into the combustion chamber, resulting in:
- Significantly increased power output
- Higher torque figures
- Better performance without engine size increase
- More responsive acceleration
Best for: Performance-oriented vehicles and modified applications
4G64 Chariot
Specifically engineered for the Mitsubishi Chariot (also known as Space Wagon in some markets). This variant features:
- Tuning optimized for people-mover applications
- Balance between power and fuel economy
- Durability for family vehicle usage
Best for: Multi-purpose vehicles requiring balanced performance
4G64 Galant
Tailored for the Mitsubishi Galant sedan lineup, this variant offers:
- Refined performance characteristics
- Smoother power delivery
- Reduced noise and vibration
- Optimization for daily commuting
Best for: Sedan applications emphasizing comfort and refinement
| Engine Variant | Displacement | Configuration | Power Output (Approx.) | Primary Applications |
|---|---|---|---|---|
| 4G64 SOHC | 2.4L (2362cc) | Single Overhead Camshaft | 130-145 HP | Economy vehicles, light utility |
| 4G64 DOHC | 2.4L (2362cc) | Dual Overhead Camshaft | 145-160 HP | Mid-range vehicles, light performance |
| 4G64T | 2.4L (2362cc) | Turbocharged | 180-230+ HP | Performance vehicles, modified applications |
| 4G64 Chariot | 2.4L (2362cc) | Varies by model year | 135-150 HP | Mitsubishi Chariot/Space Wagon |
| 4G64 Galant | 2.4L (2362cc) | Varies by model year | 140-160 HP | Mitsubishi Galant sedan series |
Specifications and Technical Details
General Engine Specifications
| Specification | Details |
|---|---|
| Engine Type | Inline 4-cylinder gasoline |
| Displacement | 2.4L (2362cc) |
| Bore × Stroke | 86.5mm × 100.0mm |
| Compression Ratio | 8.5:1 - 9.5:1 (varies by variant) |
| Fuel System | Multi-point fuel injection / Direct injection (later models) |
| Valve Train | SOHC or DOHC with 16 valves |
| Power Output | 130-230+ HP (depending on configuration) |
| Torque | 145-240+ lb-ft (depending on configuration) |
| Redline | 6,000-7,200 RPM (varies by variant) |
Maintenance and Care Guide
Proper maintenance of your 4G64 engine is essential for longevity, reliability, and optimal performance. Follow these maintenance recommendations to keep your engine running smoothly.
Pro Tip: Keep a detailed maintenance log for your 4G64 engine. Record dates, mileage, and all services performed. This record helps identify patterns, predict future needs, and maintains resale value of your vehicle.
| Maintenance Item | Interval | Description | Importance |
|---|---|---|---|
| Engine Oil Change | 3,000-5,000 miles | Replace with correct grade oil (typically 5W-30 or 10W-30) | Critical |
| Oil Filter Replacement | With every oil change | Use OEM or high-quality aftermarket filters | Critical |
| Air Filter Inspection | 10,000 miles | Check for dirt accumulation and proper airflow | High |
| Air Filter Replacement | 15,000-30,000 miles | Replace earlier in dusty conditions | High |
| Cooling System Check | 15,000 miles | Inspect hoses, connections, and coolant level | High |
| Coolant Replacement | 30,000-60,000 miles | Use manufacturer-recommended coolant type | High |
| Spark Plug Replacement | 60,000-100,000 miles | Use proper heat range plugs | Medium |
| Ignition System Check | 30,000 miles | Inspect wires, coils, and other components | Medium |
| Fuel System Cleaning | 10,000-20,000 miles | Use quality fuel system cleaners | Medium |
| Timing Belt Replacement | 60,000-100,000 miles | Critical to prevent engine damage | Critical |
| Timing Belt Tensioner | With timing belt | Replace simultaneously with belt | Critical |
| Visual Inspection | Monthly | Check for leaks, cracks, or damage | High |
| Professional Tune-Up | 30,000-60,000 miles | Comprehensive inspection and adjustment | Medium |
Warning: Failure to replace the timing belt at recommended intervals can result in catastrophic engine damage. The 4G64 is an interference engine, meaning that if the timing belt breaks, pistons may collide with valves, requiring extensive repairs.
How to Choose the Right 4G64 Engine
Selecting the appropriate 4G64 engine variant requires careful consideration of your specific needs, application, and priorities. Follow this comprehensive guide to make an informed decision.
Performance Requirements
- Analyze specifications to match power output and torque with your application needs
- Consider DOHC variants for higher performance requirements
- Evaluate turbo options for maximum power potential
- Match engine configuration to intended use (daily driving vs. performance)
Emission Standards
- Verify compliance with local emission regulations
- Check for catalytic converters and emission control systems
- Consider newer variants for stricter emission requirements
- Research required modifications to meet standards if needed
Operational Considerations
- Evaluate fuel efficiency to optimize operational costs
- Consider noise levels for residential or noise-sensitive applications
- Assess portability needs for mobile applications
- Review maintenance requirements and accessibility
| Selection Factor | Importance | Considerations |
|---|---|---|
| Engine Configuration | High | SOHC for simplicity/economy, DOHC for performance, Turbo for maximum power |
| Vehicle Compatibility | Critical | Mounting points, wiring harness, ECU compatibility |
| Mileage/Condition | High | Lower mileage generally preferred, compression test results |
| Maintenance History | High | Documentation of regular maintenance, timing belt replacement |
| Emission Compliance | Varies by region | Check local regulations before purchase |
| Fuel Efficiency | Medium | Consider operational costs and intended use |
| Warranty/Support | Medium | Availability of manufacturer support and warranty terms |
Buying Tip: When purchasing a used 4G64 engine, always request a compression test and leak-down test report. These diagnostic procedures reveal the internal health of the engine and can save you from costly surprises after purchase.
DIY Engine Replacement Guide
Replacing a 4G64 engine requires mechanical knowledge, proper tools, and careful attention to detail. This step-by-step guide outlines the process for those with intermediate to advanced mechanical skills.
Safety Warning: Engine replacement involves heavy components and hazardous materials. Always use proper safety equipment including gloves, eye protection, and appropriate lifting devices. If you're uncertain about any step, consult a professional mechanic.
1 Preparation
- Obtain the specific service manual for your vehicle and engine
- Gather all necessary tools: socket sets, wrenches, pliers, torque wrench, engine hoist
- Acquire safety equipment: gloves, safety glasses, proper ventilation
- Purchase all required replacement parts and fluids
- Allocate sufficient workspace with good lighting
- Set aside at least a full weekend for the complete job
2 Battery Disconnection
- Disconnect the negative terminal first (black cable)
- Then disconnect the positive terminal (red cable)
- Secure battery cables away from terminals to prevent accidental reconnection
3 Fluid Drainage
- Place appropriate containers under the vehicle
- Drain engine oil by removing the oil pan plug
- Drain coolant by opening the radiator drain plug and engine block drain
- Relieve fuel system pressure following manufacturer procedures
- Disconnect fuel lines and capture remaining fuel
- Properly dispose of all fluids according to local regulations
4 Component Disconnection
- Label all electrical connectors and hoses before removal
- Disconnect cooling system components (radiator, hoses)
- Remove the exhaust manifold/system connections
- Detach fuel system components (lines, rail, injectors)
- Disconnect the intake system (air filter, intake manifold)
- Remove accessory belts and pulleys
- Detach all remaining electrical connections to the engine
5 Engine Removal
- Support the transmission with appropriate jack or stand
- Remove engine mount bolts on all mounting points
- Separate engine from transmission (if applicable)
- Attach engine hoist to proper lifting points
- Slowly lift the engine, checking for any remaining connections
- Remove engine completely and place on engine stand
6 New Engine Installation
- Compare new/rebuilt engine with old engine to verify compatibility
- Transfer necessary components from old engine if needed
- Position the new engine with hoist and align with mounting points
- Reconnect to transmission (if applicable)
- Install and torque engine mount bolts to specification
7 Reconnection and Refilling
- Reconnect all components in reverse order of removal
- Reinstall accessory components and belts
- Fill engine with manufacturer-recommended oil
- Fill cooling system with proper coolant mixture
- Reconnect battery (positive terminal first, then negative)
8 Testing and Break-in
- Check for fluid leaks before starting
- Start engine and monitor gauges closely
- Check for proper idle and unusual noises
- Verify all systems are functioning correctly
- Follow manufacturer's break-in procedure for new engines
- Recheck all fluid levels after initial run
DIY Tip: Take photos throughout the disassembly process. These visual references can be invaluable during reassembly, especially for complex connections and routing of hoses and wires.
Frequently Asked Questions
Q1: What vehicles use the 4G64 engine?
The 4G64 engine has been installed in numerous vehicles from Mitsubishi and other manufacturers that use Mitsubishi engines. Common applications include:
- Mitsubishi Galant (multiple generations)
- Mitsubishi Outlander
- Mitsubishi Lancer
- Mitsubishi ASX/RVR
- Mitsubishi Eclipse
- Mitsubishi Chariot/Space Wagon
- Mitsubishi Pajero/Montero Sport
- Hyundai Sonata (certain years)
- Dodge/Plymouth Colt
- Various industrial applications and forklifts
The engine has been used across multiple markets globally, sometimes with region-specific modifications to meet local requirements.
Q2: What is the difference between the 4G64 and other 4G6 engines?
The 4G64 is part of Mitsubishi's 4G6 engine family but differs from other members in several key ways:
| Engine Model | Displacement | Bore × Stroke | Primary Differences |
|---|---|---|---|
| 4G61 | 1.6L (1595cc) | Smaller bore and stroke | Smaller displacement, often SOHC only |
| 4G62 | 1.8L (1795cc) | Smaller bore than 4G64 | Mid-range displacement, less torque than 4G64 |
| 4G63 | 2.0L (1997cc) | Smaller stroke than 4G64 | Famous for high-performance applications (Lancer Evolution) |
| 4G64 | 2.4L (2362cc) | 86.5mm × 100.0mm | Largest displacement in series, more torque-focused |
| 4G67 | 1.8L (1836cc) | Different bore/stroke ratio | Less common variant with different power characteristics |
The 4G64 generally offers more torque and better low-end power compared to smaller engines in the family, making it ideal for larger vehicles and applications requiring good pulling power.
Q3: Is the 4G64 engine good?
The 4G64 engine has earned a reputation for:
- Reliability: When properly maintained, many 4G64 engines exceed 200,000 miles
- Power Balance: Good combination of power and torque for everyday driving
- Fuel Economy: Reasonable fuel consumption for its displacement
- Simplicity: Straightforward design makes maintenance accessible
- Adaptability: Responds well to modifications and performance upgrades
Common issues include timing belt failures if maintenance is neglected, and some oil consumption in higher-mileage engines. Overall, the 4G64 is generally considered a dependable workhorse engine when properly maintained.
Q4: Can the 4G64 engine be used in other cars?
Yes, the 4G64 engine can be transplanted into various vehicles beyond its original applications, though this typically requires:
- Custom mounting brackets to fit the engine to different chassis
- Wiring harness modifications to integrate with different electrical systems
- ECU considerations - either adapting the original ECU or using aftermarket management
- Transmission compatibility assessment and potential adaptations
- Cooling system modifications to ensure proper engine temperature control
- Intake and exhaust customization to fit the new vehicle configuration
Popular swaps include using the 4G64 in older Mitsubishi vehicles originally equipped with smaller engines, or in custom projects where its combination of displacement, power, and parts availability make it attractive.
The feasibility of such a swap depends heavily on your technical skills, budget, and the specific vehicles involved. Professional consultation is recommended for major engine swap projects.
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