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:
High-beam Assistant
Concept
The high-beam Assistant detects other traffic
participants early on and automatically switches
the high beams on or off depending on the traffic
situation.
General information
The high-beam Assistant ensures that the high
beams are switched on, whenever the traffic situation
allows. In the l
Measuring Vehicle Ride Height
Determine actual ride height (A) _ to do so, attach tape measure to rim
flange (2) at bottom middle and measure
to wheel arch lower edge (1).
Fig. 28: Identifying Actual Ride Height From Rim Flange To Wheel Arch Lower
Edge
MOVING VEHICLE INTO DESIGN POSITION
Necessary preliminary work
Move VEHI
