Mitsubishi 4D31 Engine Specs
The Mitsubishi 4D31 engine is a four-cylinder diesel engine that was manufactured by Mitsubishi Motors Corporation. It was first introduced in the 1980s and has since gained popularity for its reliability and performance. In this article, we will explore the engine configuration, engine oil specifications, and service intervals for the Mitsubishi 4D31 engine.
Engine Configuration
The Mitsubishi 4D31 engine features a 3.3-liter displacement, which refers to the total volume of all cylinders combined. It is an inline four-cylinder engine, meaning that all four cylinders are arranged in a straight line. This configuration allows for a compact design and efficient power delivery.
The engine has a bore and stroke of 98 mm x 105 mm, which refers to the diameter of the cylinder and the distance the piston travels within the cylinder, respectively. The compression ratio is 17.5:1, which indicates the ratio of the cylinder’s volume when the piston is at the bottom of its stroke to its volume when the piston is at the top of its stroke. A higher compression ratio generally leads to better fuel efficiency and power output.
The Mitsubishi 4D31 engine is equipped with indirect injection, where fuel is injected into a pre-combustion chamber before entering the main combustion chamber. This design helps improve fuel atomization and combustion efficiency.
Engine Oil Specs & Service Intervals
Using the correct engine oil and adhering to the recommended service intervals are crucial for maintaining the performance and longevity of the Mitsubishi 4D31 engine. Here are the engine oil specifications and service intervals:
- Engine Oil Type: The recommended engine oil for the Mitsubishi 4D31 engine is a high-quality diesel engine oil with a viscosity grade of 15W-40. It is important to use oil that meets the API CF-4 or higher specification.
- Oil Capacity: The engine oil capacity for the Mitsubishi 4D31 engine is approximately 7.5 liters. It is essential to check the oil level regularly and top up if necessary.
- Oil Change Interval: The recommended oil change interval for the Mitsubishi 4D31 engine is every 10,000 kilometers or 6 months, whichever comes first. Regular oil changes help remove contaminants and maintain optimal engine performance.
- Oil Filter Replacement: Along with the oil change, it is crucial to replace the oil filter. The oil filter helps remove impurities from the engine oil, ensuring clean lubrication. The oil filter should be replaced at every oil change.
It is important to note that these specifications and service intervals are general guidelines. It is always recommended to refer to the vehicle’s owner’s manual or consult a qualified mechanic for the specific requirements of your Mitsubishi 4D31 engine.
Detailed Engine Specifications
| Engine | Specifications |
|---|---|
| Displacement | 3.3 liters |
| Configuration | Inline four-cylinder |
| Bore x Stroke | 98 mm x 105 mm |
| Compression Ratio | 17.5:1 |
| Fuel Injection | Indirect Injection |
These detailed engine specifications provide a comprehensive overview of the Mitsubishi 4D31 engine’s key features. Understanding these specifications can help vehicle owners and enthusiasts appreciate the engineering behind this reliable diesel engine.
In conclusion, the Mitsubishi 4D31 engine is a robust and efficient four-cylinder diesel engine. Its engine configuration, including the inline four-cylinder design and indirect injection, contributes to its performance and reliability. Adhering to the recommended engine oil specifications and service intervals is essential for maintaining the engine’s longevity. By following these guidelines, owners can ensure that their Mitsubishi 4D31 engine continues to deliver optimal performance for years to come.
1 Comment
William Clark · 22/06/2024 at 08:15
I’m considering using the 4D31 Turbo in a marine application. Short of installing a ‘Flo-Scan’ system and determining RPM v/s GPH, is this information available?