BMW M30B35 Engine Specifications
The BMW M30B35 engine is a notable inline-six engine that has garnered attention for its performance and reliability. This engine was part of the M30 family, which was produced from the late 1960s through the mid-1990s. The M30B35 variant specifically was used in various BMW models, providing a blend of power and efficiency.
Detailed Engine Specifications
The following table outlines the key specifications of the BMW M30B35 engine:
| Specification | Details |
|---|---|
| Engine Type | Inline-6 |
| Displacement | 3.5 liters (3453 cc) |
| Bore x Stroke | 89 mm x 80 mm |
| Compression Ratio | 10.0:1 |
| Maximum Power | 208 hp (154 kW) at 5,800 rpm |
| Maximum Torque | 251 Nm (185 lb-ft) at 4,000 rpm |
| Fuel System | Bosch L-Jetronic Fuel Injection |
| Ignition System | Distributor ignition |
| Cooling System | Water-cooled |
| Weight | Approximately 200 kg (440 lbs) |
Engine Configuration
The M30B35 engine features a robust inline-six configuration, which is known for its smooth operation and balanced performance. This design contributes to the engine’s ability to deliver power efficiently while maintaining a relatively low level of vibration.
Key Features of the Engine Configuration
– Inline-Six Design: The inline-six layout allows for a more compact engine design while providing excellent power delivery and torque characteristics.
– Aluminum Cylinder Head: The engine is equipped with an aluminum cylinder head, which helps reduce weight and improve thermal efficiency.
– Single Overhead Cam (SOHC): The M30B35 utilizes a single overhead camshaft design, which simplifies the engine’s architecture while still allowing for effective valve control.
– Multi-Point Fuel Injection: The Bosch L-Jetronic system provides precise fuel delivery, enhancing both performance and fuel economy.
Engine Oil Specifications
Proper maintenance of the M30B35 engine includes using the correct engine oil. The specifications for engine oil are crucial for ensuring optimal performance and longevity.
Recommended Engine Oil
– Oil Type: Synthetic or Conventional
– Viscosity: 10W-40 or 20W-50 (depending on climate and driving conditions)
– API Rating: API SG or higher
Oil Capacity
– Oil Capacity with Filter: Approximately 6.5 liters (6.9 quarts)
Service Intervals
Regular maintenance is essential for the M30B35 engine to ensure its longevity and performance. The following service intervals are recommended:
Oil Change Intervals
– Frequency: Every 5,000 to 7,500 miles (8,000 to 12,000 kilometers) or every 6 months, whichever comes first.
Other Maintenance Intervals
– Air Filter Replacement: Every 15,000 miles (24,000 kilometers)
– Fuel Filter Replacement: Every 30,000 miles (48,000 kilometers)
– Spark Plug Replacement: Every 30,000 miles (48,000 kilometers)
– Coolant Flush: Every 2 years or 30,000 miles (48,000 kilometers)
Conclusion
The BMW M30B35 engine is a testament to BMW’s engineering prowess, offering a blend of performance, reliability, and ease of maintenance. By adhering to the recommended specifications and service intervals, owners can ensure that their M30B35 engine continues to perform at its best for years to come. Whether in a classic BMW or a well-maintained vintage model, this engine remains a favorite among enthusiasts and collectors alike.
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