BMW S52 Engine Specifications
The BMW S52 engine is a notable inline-six engine that was produced by BMW from 1996 to 1999. It is primarily known for its application in the BMW Z3 and E36 M3 models. This engine is a variant of the M52 engine, featuring enhancements that provide improved performance and reliability. Below are the detailed specifications of the S52 engine.
| Specification | Details |
|---|---|
| Engine Type | Inline-6 |
| Displacement | 2.8 liters (2793 cc) |
| Power Output | 240 hp @ 6,000 rpm |
| Torque | 236 lb-ft @ 3,800 rpm |
| Bore x Stroke | 84 mm x 89.6 mm |
| Compression Ratio | 10.5:1 |
| Fuel System | Sequential fuel injection |
| Valvetrain | DOHC, 24 valves |
| Fuel Type | Premium unleaded (91 octane or higher) |
| Engine Weight | Approximately 350 lbs (159 kg) |
Engine Configuration
The S52 engine features a robust inline-six configuration, which is known for its smooth operation and balanced performance characteristics. This engine configuration is favored in performance applications due to its inherent design advantages.
Key Features of the S52 Engine Configuration
- Inline-6 Design: Provides excellent balance and smoothness, reducing vibrations.
- DOHC Valvetrain: Dual overhead camshafts allow for precise control over valve timing and improved airflow.
- High Revving: Capable of reaching high RPMs, contributing to its sporty performance.
- Aluminum Block: Lightweight construction helps improve power-to-weight ratio.
Engine Oil Specifications
Proper lubrication is critical for the longevity and performance of the S52 engine. The choice of engine oil and adherence to service intervals can significantly impact engine health.
Recommended Engine Oil
- Viscosity: 5W-30 or 10W-40
- Oil Type: Synthetic oil is recommended for optimal performance.
- Oil Capacity: Approximately 6.5 quarts (6.2 liters) with a filter change.
Oil Change Intervals
- Every 7,500 miles (12,000 km) under normal driving conditions.
- Every 5,000 miles (8,000 km) for severe driving conditions, such as frequent short trips or extreme temperatures.
Service Intervals
Regular maintenance is essential for ensuring the S52 engine operates at peak performance. Below are the recommended service intervals for various components.
Service Interval Recommendations
| Service Item | Interval |
|---|---|
| Oil Change | 7,500 miles (12,000 km) |
| Air Filter Replacement | 15,000 miles (24,000 km) |
| Fuel Filter Replacement | 30,000 miles (48,000 km) |
| Spark Plug Replacement | 30,000 miles (48,000 km) |
| Coolant Flush | Every 2 years or 30,000 miles (48,000 km) |
| Transmission Fluid Change | Every 30,000 miles (48,000 km) |
Conclusion
The BMW S52 engine is a well-engineered powerplant that combines performance with reliability. Understanding its specifications, engine configuration, oil requirements, and service intervals is crucial for maintaining its performance over time. Regular maintenance and the use of the recommended oil will ensure that the S52 continues to deliver an exhilarating driving experience for years to come.
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