The 8-cylinder BMW N63B44 engine with a volume of 4.4 liters has been produced since 2008 and is installed on almost all modern large models of the German automaker. There are a number of sports versions of this engine under the S63 index and up to 600 hp. Designed according to the concept of “Efficient Dynamics”, which means a combination of engine efficiency and driving comfort. In the quest to create an energy-intensive and environmentally friendly engine, BMW is making confident steps, although it is not so easy to do this.
This series can be safely called a new generation engine – direct fuel injection system, and, notably, two turbochargers located in the camber of the cylinder blocks are an innovation first developed by BMW engineers.
Other modifications of N63: N63B40.
The engine was installed on:
- BMW 5-Series F07 in 2009 – 2017; 5-Series F10 in 2010 – 2017; 5-Series G30 since 2017;
- BMW 6-Series F06 in 2012 – 2018; 6-Series F12 in 2011 – 2018;
- BMW 7-Series F01 in 2008 – 2015; 7-Series G11 since 2015;
- BMW 8-Series G15 since 2018;
- BMW X5 E70 in 2010 – 2013; X5 F15 in 2013 – 2018; X5 G05 since 2018;
- BMW X6 E71 in 2008 – 2014; X6 F16 in 2014 – 2019;
- BMW X7 G07 since 2018.
Specifications
| Production years | since 2008 |
| Displacement, cc | 4395 |
| Fuel system | direct injection |
| Power output, hp | 408 (N63B44O0 or N63B44) 450 (N63B44O1 or N63TU, N63B44O2 or N63TU2) 462 (N63B44M3 or N63TU3) 530 (N63B44T3 or N63TU3) |
| Torque output, Nm | 600 (O0) 650 (O1, O2, M3) 750 (T3) |
| Cylinder block | aluminum V8 |
| Block head | aluminum 32v |
| Cylinder bore, mm | 89 |
| Piston stroke, mm | 88.3 |
| Compression ratio | 10.0 (except O2) 10.5 (O2) |
| Features | no (O0) Valvetronic III (except O0) |
| Hydraulic lifters | yes |
| Timing drive | chain |
| Phase regulator | dual-VANOS |
| Turbocharging | yes (O0, O1) twin-scroll (O2, M3, T3) |
| Recommended engine oil | 5W-30 |
| Engine oil capacity, liter | 8.5 |
| Fuel type | petrol |
| Euro standards | EURO 4/5 (O0) EURO 5 (O1) EURO 5 (O2) EURO 5/6 (M3) EURO 5/6 (T3) |
| Fuel consumption, L/100 km (for BMW 750i 2013) — city — highway — combined |
13.0 7.2 9.3 |
| Engine lifespan, km | ~250 000 |
Disadvantages of the N63B44 engine
- This engine has so many problems it would take forever to list them all;
- First of all, this is an oil burner due to the wear of the valve stem seals and the occurrence of rings;
- The threads in the soft aluminum cylinder block are weak and the head can rise;
- Ordinary candles here very quickly fail and misfires begin;
- After a long stay, you can get a water hammer due to the overflow of piezo injectors;
- The oil supply pipes to the turbine gradually coke, which reduces their life;
- The timing mechanism with dual-VANOS and Valvetronic systems has low reliability.
