The 4.4-liter, eight-cylinder BMW N63B44 engine has been in production since 2008 and is found in nearly all of the German automaker’s current large models. This engine is available in several sports versions with up to 600 horsepower under the S63 index. created using the idea of “Efficient Dynamics,” which combines driving comfort and engine efficiency. BMW is moving confidently in the direction of developing an engine that is both energy-intensive and environmentally friendly, even though this is not an easy task.
With its direct fuel injection system and two turbochargers in the camber of the cylinder blocks, this series can be safely referred to as a new generation engine. BMW engineers were the first to develop this innovation.
Additional N63 modifications include 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
It would take an eternity to enumerate all of the issues with this engine;
First of all, the wear of the valve stem seals and the presence of rings indicate that this is an oil burner;
The head may rise due to the weak threads in the soft aluminum cylinder block;
Here, regular candles quickly burn out and start misfires;
The overflow of piezo injectors can result in a water hammer after a prolonged stay;
The turbine’s oil supply pipes eventually coke, shortening their lifespan;
The dual-VANOS and Valvetronic timing mechanism is unreliable.