Overview of the 6G73 Engine
The 6G73 engine is a notable member of Mitsubishi’s renowned 6G family, characterized by its robust design and performance capabilities. This 2.5-liter V6 powerhouse is a testament to Mitsubishi’s engineering prowess, delivering a blend of efficiency and power that has made it a popular choice among various vehicle manufacturers. Launched in the early 1990s, the 6G73 has cemented its reputation as a reliable and versatile engine, powering a wide array of cars across different markets.
At its core, the 6G73 is a 60-degree V6 engine featuring a DOHC (Dual Overhead Camshaft) configuration. It is equipped with a cast iron block and aluminum alloy cylinder heads, ensuring a balance between strength and weight. The engine utilizes a multi-point fuel injection system, which enhances fuel atomization and combustion efficiency. With a displacement of 2.5 liters, it typically produces power outputs ranging from 150 to 180 horsepower, depending on the specific tuning and application. This power is complemented by a respectable torque range, providing a satisfying driving experience whether on city streets or open highways.
Applications of the 6G73 Engine
The versatility of the 6G73 engine has led to its adoption in a variety of vehicles, primarily within the Mitsubishi lineup but also in several models from other manufacturers. Here are some of the notable vehicles that have been powered by this engine:
- Mitsubishi Galant: A mid-size sedan that utilized the 6G73 in various trims, offering a balanced ride and decent performance for everyday driving.
- Mitsubishi Eclipse: The sporty coupe version, especially in its earlier generations, showcased the 6G73, appealing to enthusiasts looking for a blend of style and power.
- Mitsubishi 3000GT: This iconic sports car featured the 6G73 in its base models, providing an engaging driving experience with a focus on performance.
- Mitsubishi Endeavor: A mid-size SUV that benefited from the engine’s reliability and power, making it suitable for family-oriented driving.
- Dodge Stratus: In the late 1990s, Dodge utilized the 6G73 engine in some of its models, showcasing Mitsubishi’s engineering in the American market.
- Plymouth Breeze: Similar to the Stratus, this model also featured the 6G73, allowing for a smooth and dependable ride.
The engine’s adaptability and performance characteristics have made it a staple in various vehicle segments, from sedans to sports cars and SUVs. Its ability to deliver a satisfying balance of power and efficiency has allowed it to endure through the years, even as newer technologies emerge in the automotive landscape.
Engine Specifications
The 6G73 engine is a well-engineered V6 unit that has been a staple in various Mitsubishi models and other vehicles. Its design focuses on providing a reliable and efficient powertrain that can perform well under a variety of driving conditions. Below, we delve into the detailed specifications that define this engine’s performance and capabilities.
Mitsubishi 6G73 – 2.5 L
| Specification | Details |
|---|---|
| Engine Type | V6, 60-degree |
| Displacement | 2.5 liters (2498 cc) |
| Valvetrain | DOHC (Dual Overhead Camshaft) |
| Number of Valves | 24 valves (3 per cylinder) |
| Compression Ratio | 9.5:1 |
| Fuel System | Multi-Point Fuel Injection (MPFI) |
| Power Output | 150 – 180 hp (varies by application) |
| Torque Output | 190 – 205 lb-ft (varies by application) |
| Fuel Type | Regular unleaded gasoline |
| Ignition System | Distributor-less Ignition System (DIS) |
| Cooling System | Liquid-cooled |
| Emissions Control | OBD-I/OBD-II compliant (varies by model year) |
Oil Capacity and Recommendations
Proper maintenance is crucial for the longevity of the 6G73 engine, and this includes using the right engine oil. Below are the oil capacity specifications and recommendations for optimal performance.
| Specification | Details |
|---|---|
| Oil Capacity (with filter) | 5.5 quarts (5.2 liters) |
| Oil Type | Synthetic or conventional 10W-30 |
| Oil Change Interval | Every 3,000 – 5,000 miles (4,800 – 8,000 km) |
| Oil Filter | OEM or equivalent quality |
The specifications above highlight the performance-oriented design of the 6G73 engine, showcasing its capabilities and the importance of regular maintenance to ensure it runs smoothly for years to come. Whether in a sporty coupe or a practical sedan, this engine has proven itself time and again.
Common Problems and Reliability of the 6G73 Engine
The 6G73 engine has earned a reputation for its reliability over the years, but like any mechanical component, it is not without its share of problems. Understanding these common issues can help owners maintain their vehicles better and avoid costly repairs.
Common Problems
While the 6G73 is generally a durable engine, several issues have been reported by owners and mechanics. Below are some of the most frequently encountered problems:
- Oil Leaks: Over time, gaskets and seals can wear out, leading to oil leaks. Common leak points include the valve cover gaskets and the oil pan gasket.
- Overheating: Insufficient cooling can result in overheating, often due to a failing thermostat, water pump, or clogged radiator. Overheating can cause severe engine damage if not addressed promptly.
- Timing Belt Wear: The 6G73 uses a timing belt that should be replaced at regular intervals (usually around 60,000 to 100,000 miles). Failure to replace the timing belt can lead to catastrophic engine failure.
- Knocking Noise: Some owners report a knocking noise, often attributed to worn piston rings or rod bearings. This issue can lead to more severe engine problems if not diagnosed and repaired.
- Fuel Injector Issues: Clogged or failing fuel injectors can lead to poor engine performance, reduced fuel efficiency, and rough idling.
- Ignition System Failures: Problems with the distributor or ignition coils can lead to misfires, poor acceleration, and increased emissions.
Reliability Factors
Despite the potential issues, the 6G73 engine is known for its overall reliability. Several factors contribute to this reputation:
1. Build Quality
The engine’s construction features a cast iron block and aluminum alloy heads, providing a good balance of strength and weight. This robust design helps it withstand the rigors of daily driving.
2. Maintenance
Regular maintenance plays a crucial role in the longevity of the 6G73. Adhering to oil change intervals, replacing the timing belt on schedule, and addressing any minor issues before they escalate can significantly enhance reliability.
3. Community Support
A strong community of Mitsubishi enthusiasts provides valuable resources for troubleshooting and repairs. Many owners share their experiences and solutions, which can be beneficial for new owners facing common problems.
4. Proven Track Record
Having been in production for several decades, the 6G73 has a proven track record. Many vehicles equipped with this engine have reached high mileages with proper care, further solidifying its reputation for reliability.
In summary, while the 6G73 engine is generally reliable, being aware of its common problems and adhering to regular maintenance can help ensure it continues to perform well for years to come.