BMW S85 Engine Specifications
The BMW S85 engine is a high-performance V10 engine that was used in several of BMW’s M models, most notably the M5 (E60) and M6 (E63/E64). Known for its impressive power output and unique characteristics, the S85 has garnered a dedicated following among automotive enthusiasts.
Engine Overview
The S85 engine is a naturally aspirated V10 that combines advanced engineering with high-revving capabilities. Below are the key specifications of the S85 engine:
| Specification | Details |
|---|---|
| Engine Type | V10, naturally aspirated |
| Displacement | 4.999 liters (4999 cc) |
| Power Output | 500 hp (373 kW) at 7750 rpm |
| Torque | 384 lb-ft (520 Nm) at 6100 rpm |
| Compression Ratio | 12.0:1 |
| Valvetrain | DOHC, 4 valves per cylinder |
| Fuel System | Multi-point fuel injection |
| Max RPM | 8250 rpm |
| Weight | Approx. 220 kg (485 lbs) |
Engine Configuration
The S85 engine features a sophisticated design that contributes to its performance and efficiency. Below are some of the key aspects of its configuration:
Block and Cylinder Head
– The engine block is made from aluminum, which helps reduce weight while maintaining structural integrity.
– The cylinder heads are also aluminum, featuring a complex port design that enhances airflow and combustion efficiency.
Fuel and Ignition System
– The S85 utilizes a multi-point fuel injection system that ensures precise fuel delivery to each cylinder.
– Each cylinder is equipped with two spark plugs, enhancing ignition reliability and combustion efficiency.
Exhaust System
– The engine features a high-performance exhaust system designed to optimize exhaust flow and reduce back pressure.
– The exhaust manifolds are engineered to minimize weight and maximize thermal efficiency.
Engine Oil Specifications
Proper maintenance of the S85 engine includes using the correct engine oil and adhering to service intervals. Below are the oil specifications and recommendations for the S85 engine:
Recommended Engine Oil
– Oil Type: Synthetic oil
– Viscosity: 10W-60
– Oil Capacity: Approximately 10 liters (including filter)
Oil Change Intervals
– Standard Driving Conditions: Every 15,000 km (9,300 miles) or 12 months, whichever comes first.
– Severe Driving Conditions: Every 7,500 km (4,600 miles) or 6 months, whichever comes first.
Service Intervals
Regular maintenance is crucial for the longevity and performance of the S85 engine. Below is a breakdown of recommended service intervals:
General Maintenance Schedule
- Oil Change: Every 15,000 km (9,300 miles) or 12 months.
- Air Filter Replacement: Every 30,000 km (18,600 miles).
- Fuel Filter Replacement: Every 60,000 km (37,300 miles).
- Spark Plug Replacement: Every 100,000 km (62,000 miles).
- Coolant Change: Every 4 years or 60,000 km (37,300 miles).
- Brake Fluid Change: Every 2 years.
Inspection and Additional Services
– Visual Inspection: Regularly check for leaks, wear, and damage.
– Diagnostic Check: Perform a diagnostic check every 30,000 km (18,600 miles) to ensure all systems are functioning correctly.
– Transmission Fluid Change: Recommended every 60,000 km (37,300 miles) for optimal performance.
Conclusion
The BMW S85 engine is a remarkable piece of engineering that combines power, precision, and performance. Understanding its specifications, configuration, and maintenance requirements is essential for any owner or enthusiast. Regular servicing and adherence to recommended oil specifications will ensure that the S85 continues to deliver an exhilarating driving experience for years to come.
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