Fuel and exhaust system specifications (BMW 7 Series E38)

Power supply system

Power supply system type
Petrol models	Distributed sequential injection, controlled by ECM
Diesel models	Direct injection, with distribution line ("Common Rail") or with a distribution fuel injection pump, controlled by ECM
Engine management system type
Diesel engines	DDE 2.1
M52	DME MS41.0 (Siemens Motronic MS41)
M60	DME Bosch Motronic (3.3)
M62
35 8S 1	Bosch Motronic ME5.2
35 8S 2 and 44 8S 2	Bosch Motronic ME7.2
M62	DME 5.1
M73	Bosch Motronic ME5.2
Fuel type and fuel tank capacity	see Specifications to Chapter Vehicle settings and routine maintenance
Fuel pump outlet pressure, atm
Engine M51
At idle speed	0.1÷0.16
At 4800 rpm	0.06÷0.09
Minimum	-0.1, continuous -0.2 for 10s
Maximum	+0.4
Pressure with built-in pump	0.2÷0.3
Engine M57
At idle speed	2÷3.5
Fuel return pressure	no more than 0.5
Engine M67
At idle speed	0.05÷0.4
Fuel return pressure	no more than 0.5
Fuel level sensor resistance, Ohm
When the tank is empty (85 l//95 l)	65÷90//15÷40
With a full tank (left//right tank)	480÷494//470÷484
Fuel pump operating pressure, atm
Diesel models	0.4
Petrol models	3.5
Fuel pump current consumption, A
Diesel models	no more than 6
Petrol models	not less than 9.5
Operating pressure of the main fuel pump, atm
Engine M57	no more than 3.8
Fuel pump current consumption, A
Engine M57	no more than 11

Engine Boost Pressure Sensor
Supply voltage, V	5÷0.25
Pressure measurement range, kPa
Engine M51	50÷250
Engines M57, M67	50÷240

Engine M51
Fuel injection pump code designation	VP 15VE 6/10 E2400 R 515
Emergency valve switching voltage, V	not less than 10
Resistance of the emergency valve at 20°C, Ohm	7.5±2
Maximum//minimum pressure inside the high-pressure fuel pump (at 40÷60°C), atm
At 700 rpm	6.5//4.5
At 4800 rpm	10//8
Opening pressure of the bypass valve, atm	not less than 3.5
Data for static adjustment of the injection pump (when first installed or with a new drive chain), mm
Set adjustment value at TDC position	0.95±0.03
Control value (chain service life over 20,000 km)	0.90÷0.78

Engines M57, M67
Fuel injection pump code designation (M57//M67)	CP1//CP3.3
Pressure inside the injection pump	cannot be measured
Fuel distribution line pressure "Common Rail" at starter speed, atm	not less than 250

Nozzle body type
Normal	KCA 21S71
With needle lift sensor	KCA 21S76/1
Nozzle body type	DNO SD 300
Injection start pressure, atm
Adjustable value	150÷158
Minimum//maximum value	140//160
Maximum permissible difference in pressure at the start of lift, atm	10
Thickness of mounting washer, mm	1.0÷2.0

CO content before/after catalytic converter, %
Engines M52 B 28, M52TU	0.7±0.5//0.5±0.3
Engines M60/1, M60/2, M62	1.0±0.5//no more than 0.5
Engine M73	0.4÷1.6//no more than 0.5

Fastening the turbocharger to the exhaust manifold	50
Hollow bolt for fastening the oil supply pipe to the turbocharger and cylinder block/head	25
Boost Air Hose Clamps	6
Threaded plug in the timing belt cover
Thread M20x1.5 and M40x1.5	30
Thread M30x1	70
Fasteners for injector assembly (m51 engine)	80
Union nuts for fastening the fuel line to the injection pump and injector assembly (m51 engine)	20
Nozzle (to the cylinder head cover) – M57//M67 engines	9//30
Pressure sensor to the fuel distribution line	38
Pressure regulator for fuel injection pump	9
Pressure regulating valve to the fuel distributor	5
Pressure regulator to the fuel distribution line	80
Hollow bolt securing the return line to the fuel distribution line	25
Fastening of the fuel injection pump sprocket for M51//M57 and M67 engines	50//65
Fastener for the fuel injection pump drive chain tensioner for the M51 engine	15
Fuel cut-off valve	20
Upstream catalytic converter to turbocharger
Engine M57	42
Engine M67	15
Rear additional muffler clamp	15
Fastening the electrical wiring to the electronic catalytic converter	5
Fastening the fuel level sensor to the intake device	2
Fastening the fuel pump assembly to the fuel tank	6.5
Fastening the turbocharger to the exhaust manifold	50
Hollow bolt for fastening the oil feed pipe to the turbocharger and cylinder block	25
Boost Air Hose Clamps	6

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