Nissan QR25DE Engine Specifications
The Nissan QR25DE engine is a popular inline-4 engine that has been utilized in various Nissan and Infiniti models. Known for its reliability and performance, this engine has garnered attention from automotive enthusiasts and everyday drivers alike. Below are the detailed specifications of the QR25DE engine.
| Specification | Details |
|---|---|
| Engine Type | Inline-4, DOHC, 16-valve |
| Displacement | 2.5 liters (2488 cc) |
| Bore x Stroke | 89 mm x 100 mm |
| Compression Ratio | 9.6:1 |
| Maximum Power | 170 hp (126 kW) at 6000 rpm |
| Maximum Torque | 175 lb-ft (237 Nm) at 4000 rpm |
| Fuel System | Multi-Point Fuel Injection (MPFI) |
| Fuel Type | Regular unleaded gasoline |
| Ignition System | Distributor-less ignition system (DIS) |
| Engine Weight | Approximately 350 lbs (159 kg) |
Engine Configuration
The Nissan QR25DE engine features a robust inline-4 configuration, which is a common choice for many modern vehicles due to its balance of performance and fuel efficiency. The engine is equipped with a dual overhead camshaft (DOHC) design, allowing for precise control of the intake and exhaust valves. This configuration contributes to better airflow and improved combustion efficiency.
Key Features of the QR25DE Engine Configuration
- Inline-4 Design: Provides a compact engine layout, ideal for various vehicle platforms.
- DOHC Setup: Enhances performance by allowing for higher RPMs and better power delivery.
- 16-Valve Configuration: Improves airflow and combustion efficiency, resulting in better performance and fuel economy.
- Multi-Point Fuel Injection: Ensures precise fuel delivery for optimal engine performance.
Engine Oil Specifications
Proper maintenance of the QR25DE engine includes using the correct engine oil and adhering to recommended service intervals. The choice of engine oil is crucial for ensuring the longevity and performance of the engine.
Recommended Engine Oil
- Oil Type: Synthetic or conventional oil
- Viscosity: 5W-30 or 10W-30
- API Rating: API SN or higher
Oil Capacity
The QR25DE engine has an oil capacity of approximately 5.1 quarts (4.8 liters) when equipped with a new oil filter. It is essential to check the oil level regularly and top it off as needed to maintain optimal engine performance.
Service Intervals
Regular maintenance is vital for the QR25DE engine to ensure its reliability and performance over time. Here are the recommended service intervals for oil changes and other maintenance tasks.
Oil Change Intervals
- Every 5,000 to 7,500 miles (8,000 to 12,000 km) for conventional oil.
- Every 7,500 to 10,000 miles (12,000 to 16,000 km) for synthetic oil.
Other Maintenance Recommendations
- Air Filter Replacement: Every 15,000 to 30,000 miles (24,000 to 48,000 km), depending on driving conditions.
- Fuel Filter Replacement: Every 30,000 miles (48,000 km).
- Spark Plug Replacement: Every 100,000 miles (160,000 km).
- Coolant Change: Every 60,000 miles (96,000 km).
Conclusion
The Nissan QR25DE engine is a well-engineered powerplant that combines performance, efficiency, and reliability. Understanding its specifications, engine configuration, oil requirements, and maintenance intervals is essential for any owner or enthusiast. By adhering to recommended service practices, drivers can ensure their QR25DE engine remains in optimal condition for years to come.
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