The BMW S65B40 engine is a V8 naturally aspirated engine with two overhead camshafts (DOHC), 32 valves, which replaced the S54 six-cylinder engine and has been in production since 2007. The BMW S65 is only available on the BMW M3 and has the same bore / stroke as the 10-cylinder S85, but unlike the S85, the VANOS system is driven by oil pressure. The replacement for this power unit was the 6-cylinder – S55.
Specifications
| Production years | 2007-2013 |
| Displacement, cc | 3999 |
| Fuel system | injector |
| Power output, hp | 420 /8300 rpm |
| Torque output, Nm | 400 /3900 rpm |
| Cylinder block | aluminum V8 |
| Block head | aluminum 32v |
| 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 | 8.8 |
| Fuel type | petrol |
| Euro standards | Euro 4 |
| Fuel consumption, L/100 km (for E90 M3) — city — highway — combined |
17.0 9.0 11.9 |
| Engine lifespan, km | ~200 000 |
| Weight, kg | 202 |
| Oil consumption, gr/1000 km | up to 1000 |
| Transmission — 6MT — M DCT |
ZF Type-G Getrag GS7D36SG |
| Gear ratios, 6MT | 1 — 4.06 2 — 2.40 3 — 1.58 4 — 1.19 5 — 1.00 6 — 0.87 |
| Gear ratios, M DCT | 1 — 4.78 2 — 2.93 3 — 2.15 4 — 1.68 5 — 1.39 6 — 1.20 7 — 1.00 |
The engine was installed on:
- BMW M3-Series E90 in 2008 – 2013;
- Wiesmann MF4-S in 2009 – 2014.
Disadvantages of the S65B40 engine
Periodic repairs are required for the Vanos system; for this, a repair kit is used. Running problems can lead to engine rattling.
The motor works without problems for a long time, subject to regular maintenance, no overheating, timely replacement of worn parts.
Frequently asked questions about the BMW S65B40
How much power does the BMW S65B40 make?
Power output of the BMW S65B40, hp: 420 /8300 rpm. Torque, Nm: 400 /3900 rpm.
How much oil does the BMW S65B40 take and which one?
Engine oil capacity: 8.8 liters. Recommended oil: 10W-60.
Does the BMW S65B40 have a timing belt or chain?
The BMW S65B40 uses a timing chain.
Is the BMW S65B40 turbocharged?
No, the BMW S65B40 is naturally aspirated.
Does the BMW S65B40 need valve clearance adjustment?
No, the BMW S65B40 has hydraulic lifters, so the valve clearances do not need to be adjusted.
How long does the BMW S65B40 last?
The typical lifespan of the BMW S65B40 is ~200 000 km with proper maintenance.
What is the fuel consumption of the BMW S65B40?
E90 M3: city 17.0, highway 9.0, combined 11.9 L/100 km.
What cars was the BMW S65B40 installed on?
BMW M3-Series E90 in 2008 - 2013; Wiesmann MF4-S in 2009 - 2014.
