Engine BMW N62B40 under the hood

Engine BMW N62B40

The engines of the BMW N62 series are V-8 units with 2 overhead camshafts and 4 valves per cylinder, as well as SFI fuel injection. BMW N62 engines have been produced since 2005. The BMW N62B40 has a displacement of 4 liters (3996 cc) and develops 306 hp (225 kW) at 6300 rpm. The torque is 390 Nm at 3500 rpm.


Manufacturer BMW Plant Dingolfing
Also called N62
Production years 2005-2010
Cylinder block alloy aluminum
Fuel system injector
Configuration V
Number of cylinders 8
Valves per cylinder 4
Piston stroke, mm 84.1
Cylinder bore, mm 87
Compression ratio 10.5
Displacement, cc 3996
Power output, hp 306/6300
Torque output, Nm / rpm 390/3500
Fuel type 95
Euro standards Euro 4
Weight, kg
Fuel consumption, L/100 km (for 740i E65)
— city
— highway
— combined
Oil consumption, gr/1000 km up to 1000
Recommended engine oil 5W-30 / 5W-40
Engine oil capacity, liter 8.0
Oil change interval, km 7000-10000
Normal engine operating temperature, °C ~105
Engine lifespan, km
— official information
— real


Frequent problems

Engine BMW N62B40

  1. Oil burn. The wear of the valve stem seals and rings is the main drawback of this engine after running it for 100 thousand kilometers, leading to excessive consumption of oil. Therefore, constant monitoring of their condition and timely replacement with new ones is required.
  2. Difference in the number of revolutions. Interruptions in the rhythm of the engine are very often a manifestation of a breakdown of the ignition coil. It needs to be checked and, in the event of a malfunction, simply replaced with a new one. Also, the problem can be observed with air pumping, wear of the valvetronic and flow meter.
  3. Oil is leaking. The main reason is the wear of the oil seal on the crankshaft or the gasket in the generator case. They need to be replaced with new ones.

Often in engines of the N62 series, after many years of operation, scuffs in the cylinders are observed. The reason for them is the gradual destruction of the catalysts and the penetration of their smallest segments into the unit. The problem can be eliminated by completely replacing the catalysts with flame arresters. In order for the engine to function longer and without serious breakdowns, it is necessary to constantly check the quality of the fuels and lubricants used for it. In addition, it is important to always monitor its condition and carry out timely maintenance.

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