S85 engine

BMW S85 Engine (S85B50)

 

BMW S85 engine is a V-shaped 10-cylinder piston engine with two overhead camshafts (DOHC), which replaced the S62 engine and was produced from 2005 to 2010 for the M5 (E60 / E61) and M6 (E63 / E64) and Wiesmann MF5. Power unit technology is based on the Williams F1 engine.

S85B50 cylinder blocks are made mainly of aluminum alloys using low pressure, except some special steels and they form an angle of 90 °. This angle is considered the best to balance the weight and reduce vibration, especially one that can affect the crankshaft.

Pistons for S85 are made of high-quality heat-resistant aluminum alloy and weighs 481.7 grams, including piston pins and rings. Rods with bearing shells weigh 623 grams.

bmw-s85-b50

In 2005, the first year that it was nominated, the S85B50 won four different International Engine of the Year awards in the following 4 categories:

  • International Engine of the Year, BMW 5.0 Litre V10 (M5,M6)
  • Best Performance Engine
  • Best New Engine
  • Best Above 4.0 Litre

In 2006 the S85B50 won several International Engine of the Year awards, winning in the following 3 categories:

  • International Engine of the Year, BMW 5.0 Litre V10 (M5,M6)
  • Best Performance Engine
  • Best Above 4.0 Litre

In 2007 the S85B50 won several International Engine of the Year awards, winning in the following 2 categories:

  • Best Performance Engine
  • Best Above 4.0 Litre

In 2008 the S85B50 won an International Engine of the Year award, winning in the following category:

  • Best Above 4.0 Litre

BMW S85 engine was replaced by the S63 engine.

BMW M5 E60 S85 V10 Sound

BMW S85 engine specs

Manufacturer Dingolfing Plant Also called BMW S85 Production 2005-2010 Cylinder block alloy Aluminum Configuration V10 Valvetrain DOHC 4 valves per cylinder Piston stroke, mm (inch) 75.2 (2.96) Cylinder bore, mm (inch) 92 (3.62) Compression ratio 12.0 Displacement 4999 cc (305.1 cu in) Power output 373 kW (507 HP) at 7,750 rpm Torque output 520 Nm (384 lb·ft) at 6,100 rpm Redline 8,250 HP per liter 101.4 Fuel type Gasoline Weight, kg (lbs) 240 (530) Fuel consumption, L/100 km (mpg) -City -Highway -Combined for E60 M5 22.7 (10) 10.2 (23) 14.8 (16) Turbocharger Naturally aspirated Oil consumption , L/1000 km (qt. per miles) up to 1.0 (1 qt. per 750 miles) Recommended engine oil 10W-60 Engine oil capacity, L (qt.) 9.3 (9.8) Oil change interval, km (miles) 5,000-10,000 (3,000-6,000) Normal engine operating temperature, °C (F) – Engine lifespan, km (miles) -Official information -Real – 200,000+ (120,000) Tuning, HP -Max HP -No life span loss 600+ –

bmw_s85b50_engine

This engine is also installed in:

BMW S85B50 engine problems

Firs of all pay attention to the VANOS system. Always check the temperature of it and try not to overheat it.

Also this engine has problems with premature wear of connecting rod bearings. The interval of it’s replacement is about 50,000 miles (80,000 km).

2005 BMW M5 S85 engine misfiring diagnose, case study

 

BEST BMW 2015 BMW M6 S85 Engine Repair

 

2006 BMW M5 E60 5.0L V10 S85 Engine Test

 

BMW E60 M5 Conrod Bearing Shell Wear – Cylinder 9 near failure

References

  1. En.wikipedia.org. (2017). BMW S85. [online] Available at: https://en.wikipedia.org/wiki/BMW_S85.
  2. http://www.ebay.com/bhp/bmw-s85
  3. http://mywikimotors.com/bmw-s85/
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