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
| Production years | 2005-2010 |
| Displacement, cc | 4999 |
| Fuel system | injector |
| Power output, hp | 507 /7750 rpm |
| Torque output, Nm | 520 /6200 rpm |
| Cylinder block | aluminum V10 |
| Block head | aluminum 40v |
| Cylinder bore, mm | 92 |
| Piston stroke, mm | 75.2 |
| Compression ratio | 12.0 |
| Hydraulic lifters | yes |
| Timing drive | chain |
| Turbocharging | no |
| Recommended engine oil | 10W-60 |
| Engine oil capacity, liter | 9.3 |
| Fuel type | petrol |
| Euro standards | Euro 4 |
| Fuel consumption, L/100 km — city — highway — combined |
22.7 10.2 14.8 |
| Engine lifespan, km | ~200 000 |
| Weight, kg | 240 |
| Oil consumption, gr/1000 km | up to 1000 |
| 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 |
The engine was installed on:
- BMW M5-Series E60 in 2005 – 2010;
- BMW M6-Series E63 in 2005 – 2010.
Disadvantages of the S85B50 engine
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.
Frequently asked questions about the BMW S85B50
How much power does the BMW S85B50 make?
Power output of the BMW S85B50, hp: 507 /7750 rpm. Torque, Nm: 520 /6200 rpm.
How much oil does the BMW S85B50 take and which one?
Engine oil capacity: 9.3 liters. Recommended oil: 10W-60.
Does the BMW S85B50 have a timing belt or chain?
The BMW S85B50 uses a timing chain.
Is the BMW S85B50 turbocharged?
No, the BMW S85B50 is naturally aspirated.
Does the BMW S85B50 need valve clearance adjustment?
No, the BMW S85B50 has hydraulic lifters, so the valve clearances do not need to be adjusted.
How long does the BMW S85B50 last?
The typical lifespan of the BMW S85B50 is ~200 000 km with proper maintenance.
What cars was the BMW S85B50 installed on?
BMW M5-Series E60 in 2005 - 2010; BMW M6-Series E63 in 2005 - 2010.
