BMW 7 Series: Checking Fuel Delivery Pressure (N20, N53, N54, N55, N63, N74)
Necessary preliminary work:
Connect BMW diagnosis system.
IMPORTANT: Lines are under pressure!
Wear protective goggles and gloves.
Fuel can emerge spontaneously at high velocity when the fuel line is released!
Recycling:
Catch and dispose of escaping fuel with auxiliary materials.
Observe country-specific waste disposal regulations.
NOTE: Remove circlip (1).
Unlock and detach fuel line (2) to fuel tank from fuel line (2) to high pressure pump.
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Fig. 9: Identifying Circlip, Fuel Line And Fuel Tank
Unscrew adapter (1) from special tool 13 5 270.
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Fig. 10: Identifying Adapter And Special Tool 13 5 270
Insert special tool 13 5 270 into disconnected fuel line.
Screw onto special tool 13 5 270, the special tool 11 4 310.
Screw IMIB 100 bar pressure sensor (1) on the special tool 11 4 310.
NOTE: As an alternative to the 100 bar IMIB pressure sensor (1), the 25 bar pressure sensor can also be used. For this, screw on special tool 11 5 364 instead of special tool 11 4 310 into special tool 13 5 270. Or directly screw the pressure manometer from the set of special tools 13 3 060 onto the special tool 13 5 270.
Establish fuel delivery pressure. Read off fuel delivery pressure on IMIB and compare with values in diagnosis system.
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Fig. 11: Identifying Pressure Sensor And Special Tools 11 4 310 And 13 5 270
Assemble engine.
Check fuel system for tightness.
READ NEXT:
Notes Regarding The Fuel Pressure Test (Reference Pressure:
Surrounding Area)
The characteristic of this version with ambient pressure:
The connection for the vacuum hose of the fuel pressure regulator is located
between the throttle and the air
cleaner or on the air cleaner.
Removing And Installing/Replacing All Pressure Lines (N63)
Notes
WARNING: Electric fuel pump starts up automatically when door is
opened!
Disconnect BATTERY NEGATIVE TERMINAL (risk of fire due to shortcircuiting
on removal).
Observe warning on cylinder head
SEE MORE:
System Components
Control Units, Control Elements and Spindle Drives
Luggage Compartment Lid Lift
The luggage compartment lid lift is fitted on the right-hand side in the
luggage compartment floor. The HKL
controls and monitors the operation of the automatic luggage compartment lid
actuating system.
The control lo
Corrosion Protection
NOTE: Following repairs, the corrosion protection work already begins with
the correct
removal of the PVC undercoating, anti-drumming layer and seam seals.
The PRODUCTS RECOMMENDED by BMW are optimized with regard to
corrosion protection.
1.0 Removing and applying sealing materials
1.1 Removing sea
