BMW N51 Engine Specifications
The BMW N51 engine is a notable powerplant that has garnered attention for its performance and efficiency. This inline-six engine is part of BMW’s N-series engines and is known for its smooth operation and robust power delivery. Below are the detailed specifications of the N51 engine.
| Specification | Details |
|---|---|
| Engine Type | Inline-6 |
| Displacement | 3.0 liters (2996 cc) |
| Power Output | 230 hp (171 kW) at 6,500 rpm |
| Torque | 200 lb-ft (271 Nm) at 2,750 rpm |
| Compression Ratio | 10.7:1 |
| Fuel System | Direct Injection |
| Fuel Type | Premium Unleaded |
| Valvetrain | DOHC, 24 valves |
| Engine Weight | Approximately 350 lbs (159 kg) |
Engine Configuration
The BMW N51 engine features a well-engineered configuration that contributes to its performance characteristics. Below are key aspects of its configuration:
Engine Layout
– Inline-6 configuration allows for a smoother operation due to the even firing order.
– The engine is mounted longitudinally in the vehicle, which helps with weight distribution.
Components
– Cylinder Block: Made from aluminum alloy for reduced weight.
– Cylinder Head: Also aluminum, featuring dual overhead camshafts (DOHC) for improved airflow and performance.
– Pistons and Crankshaft: Designed for durability and efficiency, contributing to the engine’s longevity.
Performance Features
– Variable Valve Timing: Enhances performance across different RPM ranges.
– Direct Fuel Injection: Improves fuel efficiency and reduces emissions.
– Dual Vanos: BMW’s variable valve timing system that optimizes performance and efficiency.
Engine Oil Specifications
Proper maintenance of the BMW N51 engine includes using the right engine oil. Below are the specifications for engine oil:
| Specification | Details |
|---|---|
| Oil Type | Synthetic Oil |
| Viscosity Grade | SAE 5W-30 |
| Oil Capacity | 6.9 quarts (6.5 liters) with filter |
| Oil Change Interval | 10,000 miles (16,000 km) or 12 months, whichever comes first |
Service Intervals
Regular maintenance is crucial for the longevity and performance of the BMW N51 engine. Below are recommended service intervals:
Oil Change and Filter Replacement
– Change engine oil and filter every 10,000 miles (16,000 km) or annually.
Air Filter Replacement
– Replace the engine air filter every 30,000 miles (48,000 km).
Fuel Filter Replacement
– Recommended every 60,000 miles (96,000 km).
Spark Plug Replacement
– Change spark plugs every 60,000 miles (96,000 km) for optimal performance.
Coolant Flush
– Perform a coolant flush every 2 years or 30,000 miles (48,000 km).
Transmission Fluid Change
– Change transmission fluid every 60,000 miles (96,000 km).
Conclusion
The BMW N51 engine is a well-crafted powerplant that combines performance, efficiency, and reliability. Understanding its specifications, configuration, oil requirements, and service intervals is essential for maintaining its performance and longevity. Regular maintenance and using the right components will ensure that the N51 engine continues to deliver a thrilling driving experience for years to come.
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