BMW S55 Engine Specifications
The BMW S55 engine is a high-performance powerplant that has gained recognition for its impressive specifications and capabilities. This inline-six engine is primarily found in the BMW M3 and M4 models, among others. Below are the detailed specifications of the S55 engine.
| Specification | Details |
|---|---|
| Engine Type | Inline-6, Twin-Turbocharged |
| Displacement | 2,998 cc (3.0 L) |
| Power Output | 425 hp (317 kW) – 503 hp (373 kW) (Competition models) |
| Torque | 406 lb-ft (550 Nm) – 479 lb-ft (650 Nm) (Competition models) |
| Compression Ratio | 10.2:1 |
| Turbocharger | Twin-scroll turbochargers |
| Fuel System | Direct fuel injection |
| Valvetrain | DOHC, 24 valves |
| Max RPM | 7,600 RPM |
| Weight | Approx. 170 kg (375 lbs) |
Engine Configuration
The BMW S55 engine features a sophisticated design that contributes to its performance and efficiency. Below are the key aspects of its configuration:
Layout
– Inline-six configuration provides a smooth power delivery and balance.
– Twin-turbocharging enhances power output and responsiveness.
Cooling System
– Equipped with an advanced cooling system to maintain optimal operating temperatures.
– Includes an oil cooler to ensure engine longevity under high-performance conditions.
Fuel Delivery
– Direct fuel injection system allows for precise fuel delivery and improved combustion efficiency.
– Supports high fuel pressure for optimal performance.
Exhaust System
– Integrated exhaust manifold design reduces turbo lag and improves throttle response.
– Dual exhaust outlets enhance the engine’s sound and performance.
Engine Oil Specifications
Proper lubrication is critical for the performance and longevity of the S55 engine. Below are the recommended engine oil specifications:
Oil Type
– Full synthetic oil is recommended for optimal performance and protection.
Viscosity Ratings
– Recommended viscosity: 0W-30 or 5W-30, depending on climate and driving conditions.
Oil Capacity
– Oil capacity (with filter): Approximately 8.5 quarts (8 liters).
Oil Change Intervals
– Standard oil change interval: Every 10,000 miles (16,000 km) or 12 months, whichever comes first.
– For high-performance driving conditions, consider more frequent oil changes, such as every 5,000 miles (8,000 km).
Service Intervals
Regular maintenance is essential to keep the BMW S55 engine running smoothly. Below are the recommended service intervals:
General Maintenance Schedule
– Every 10,000 miles (16,000 km):
– Engine oil and filter change.
– Check and replace air filter if necessary.
– Inspect brake fluid and replace if needed.
– Every 20,000 miles (32,000 km):
– Inspect spark plugs and replace if necessary.
– Check coolant level and condition.
– Inspect drive belts for wear.
– Every 30,000 miles (48,000 km):
– Replace cabin air filter.
– Inspect fuel system components.
– Every 60,000 miles (96,000 km):
– Replace spark plugs.
– Inspect and service the cooling system.
Additional Considerations
– If the vehicle is driven in extreme conditions (e.g., track use, heavy towing), more frequent maintenance may be necessary.
– Regularly monitor engine performance and listen for unusual noises, which could indicate the need for immediate inspection.
Conclusion
The BMW S55 engine is a remarkable piece of engineering that combines power, efficiency, and advanced technology. Understanding its specifications, configuration, and maintenance requirements is crucial for any owner or enthusiast. By adhering to the recommended service intervals and using the correct engine oil, drivers can ensure their S55 engine remains in peak condition for years to come.
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