Engine BMW S85B50 under the hood

Engine BMW S85B50

BMW S85 Engine – V-type 10-cylinder piston engine with two overhead camshafts (DOHC), which replaced the S62 engine, was produced from 2005 to 2010 and was used in BMW E60 M5, E61 M5 and E63/64 M6. The S85B50 engine is high-revving, with a red mark on the 8250 rpm rev counter. It reaches over 100 hp. (70 kW) per liter, and has a very high Compression ratio of 12.0: 1. Its technology is based on the BMW Williams F1 engine.

Specifications

Manufacturer Dingolfing Plant
Also called S85
Production years 2005-2010
Cylinder block alloy aluminum
Fuel system injector
Configuration V
Number of cylinders 10
Valves per cylinder 4
Piston stroke, mm 75.2
Cylinder bore, mm 92
Compression ratio 12.0
Displacement, cc 4999
Power output, hp 507/7750
Torque output, Nm / rpm 520/6200
Fuel type 98
Euro standards Euro 4
Weight, kg 240
Fuel consumption, L/100 km
— city
— highway
— combined
22.7
10.2
14.8
Oil consumption, gr/1000 km up to 1000
Recommended engine oil 10W-60
Engine oil capacity, liter 9.3
Oil change interval, km 7000-10000
Normal engine operating temperature, °C
Engine lifespan, km
— official information
— real

200+
Transmission
— 6MT
— SMG III
ZF Type-G
Getrag 247
Gear ratios, 6MT 1 — 4.05
2 — 2.40
3 — 1.58
4 — 1.19
5 — 1.00
6 — 0.87
Gear ratios, SMG III 1 — 3.99
2 — 2.65
3 — 1.81
4 — 1.39
5 — 1.16
6 — 1.00
7 — 0.83

Frequent problems

Engine BMW S85B50 under the hoodThe BMW S85 engine is characterized by premature wear on the connecting rod bearings. Replacement must be done every 80 thousand kilometers. In this case, it is better to change the liners in advance, without waiting for complete wear and tear, in order to prevent breakdowns, the elimination of which will require significant investments.

Periodic repairs are necessary for the Vanos system, problems occur infrequently, but require timely elimination. Overheating of the motor should be avoided.

With regular diagnostics and maintenance, the powertrain of the BMW S85 will last a long time and without any problems.

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