The BMW N62B44 engine has two versions. Displacement, power, bore and stroke are the same for both versions: 4.4 liters (4398 cc), 92 mm bore and 82.7 mm stroke. Developed power of one version is 320 hp at 6100 rpm, and torque is 440 Nm at 3700 rpm. The second version develops 333 hp at 6100 rpm, its torque is 450 Nm at 3600 rpm.
Other modifications of N62: N62B36, N62B40, N62B48.
Specifications
| Production years | 2001-2006 |
| Displacement, cc | 4398 |
| Fuel system | injector |
| Power output, hp | 320 /6100 rpm 333 /6100 rpm |
| Torque output, Nm | 440 /3600 rpm 450 /3500 rpm |
| Cylinder block | aluminum V8 |
| Block head | aluminum 32v |
| Cylinder bore, mm | 92 |
| Piston stroke, mm | 82.7 |
| Compression ratio | 10 10.5 |
| Features | Valvetronic |
| Hydraulic lifters | yes |
| Timing drive | chain |
| Phase regulator | double VANOS |
| Turbocharging | no |
| Recommended engine oil | 5W-30 |
| Engine oil capacity, liter | 8.0 |
| Fuel type | petrol |
| Euro standards | EURO 3/4 |
| Fuel consumption, L/100 km (for BMW 745i E65) — city — highway — combined |
7.1 5.3 5.8 |
| Engine lifespan, km | ~320 000 |
| Weight, kg | 213 |
Disadvantages of the N62B44 engine
- The main problems of the motor are associated with malfunctions of the Valvetronic and VANOS systems;
- In second place is the growing oil consumption due to wear of valve stem seals;
- Floating RPM is usually caused by ignition coils or flowmeters;
- Very often the sealing gasket of the generator housing and the crankshaft oil seal are leaking;
- On a long run, crumbs from a collapsing catalyst are sucked into the cylinders.
