Engine BMW N63B40

The 8-cylinder V-engine N63B40 was sold in the Chinese market, this is a smaller version of the N63B44. Due to the shorter stroke of 80 mm (3.15 in), the volume is reduced to 3982 cc (243.0 cu in).

Other modifications of N63: N63B44.

The engine was installed on:

  • BMW F12/F13 650i in 2012-2015;
  • BMW F01/F02 750i/750Li in 2012-2015.


Production years 2012-2015
Displacement, cc 3982
Fuel system direct injection
Power output, hp 408 – 449
Torque output, Nm 600 – 650
Cylinder block aluminum V8
Block head aluminum 32v
Cylinder bore, mm 89
Piston stroke, mm 80
Compression ratio 10.0
Features Valvetronic III
Hydraulic lifters yes
Timing drive chain
Phase regulator dual-VANOS
Turbocharging yes
Recommended engine oil 5W-30
Engine oil capacity, liter 8.5
Fuel type petrol
Euro standards EURO 5
Engine lifespan, km ~250 000

Disadvantages of the N63B40 engine

  • 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.

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