Engine Electrical System Specifications (BMW 7 Series E38)

Battery voltage, V	12
Cylinder firing order
6-cylinder engines	1-5-3-6-2-4
8-cylinder engines	1-5-4-8-6-3-7-2
12-cylinder engines	1-7-5-11-3-9-6-12-2-8-4-10
Spark plug type
M52 engines	NGK BKR 6EK or Bosch F7 LDCR
M52TU engines	NGK BKR 6E QYP
Engines M60/1, M60/2	NGK 6E EKG or Bosch F7 LDCR
Engine M62	NGK BKR 6EK
Engine M73	Bosch F8 LCR or Bosch F9 LCR
CKP sensor resistance, Ohm	1280±10%
Distance between CKP sensor and rotor, mm	1.0±0.3
Current consumption of glow plug after 5 s of operation, A	no more than 13÷15
Glow plug temperature after 5 s of operation, °C
Engine M51	800
Engines M57, M67	850
Glow plug resistance, Ohm
Engine M51	4÷6
Engines M57, M67	0.5÷2
Nominal voltage at the generator output, V	14
Nominal current//generator power, A//W	65//910, 70//980, 80//1120, …, 150//2100
Capacity of the noise suppression capacitor, μF	2.2±20%
Adjustable voltage at 1500 rpm, without consumers, V	13.5÷14.1
Starter nominal power, W
Engines M51, M57, M73	2.2
Engines M52, M60, M62	1.7
Engine	2.6
Axial play of starter anchor, mm	0.1÷0.2
Length of starter carbon brush, mm	not less than 13
Current consumption at contact 50 of the starter (pull-in//holding winding), A
With a rated power of 1.4 kW	54.5//10.5
With a rated power of 1.7 kW with a counter drive	51//9.5
At a rated power of 1.8 kW	50//12
At a rated power of 2.0 kW	54.5//10.5
At a rated power of 2.2 kW	58//13
With a rated power of 2.2 kW with a counter drive	60//10
With a rated power of 2.6 kW with a counter drive	50 // 12

Tightening force of threaded connections, Nm

Fastening the cover of the control electronics compartment	4
Fastening the positive wire (contact 30) to glow plug relay
Engine M51	4
Engines M57, M67	5
80A Fuse Mount to Glow Plug Relay	2
Glow plug
Engine M51	20
Engines M57(TU), M67	18
Glow Plug Terminal Bolt	4
Fastening the starter to the gearbox housing	45
Fastening the support bracket to the starter	5
Fastening the support bracket to the crankcase	47
Fastening the wires to the starter (thread M5//M6//M8)	5//7//13
Fastening the heat shield to the starter	6
Fastening contact D//B to the generator	7//13
Generator Pulley Fastener
Water cooled generator	80
Air cooled generator	70
Fastening of pressure and temperature sensors of engine oil	27
Knock sensor mount	20
CKP sensor mount	10
CMP sensor mount	4
Coolant temperature sensor fastener
Engines M51 and M60	18
Other engines	13
IAT sensor mount	13
Boost Pressure Sensor Fastener	4
MAF sensor mount	4

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БМВ E38: Ignition and control systems

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