13 31 029 Checking fuel delivery pressure (N20, N53, N54, N55, N63 B40/44 O 0/1, N74)

Special tools required:

Necessary preliminary tasks:

Connect BMW diagnosis system

IMPORTANT: Lines are under pressure!

Wear safety 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.

Fig 1: Identifying Fuel Line And Circlip

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Unscrew adapter (1) from special tool 13 5 270 .

Fig 2: Removing Adapter From Special Tool (13 5 270)

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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 .

Fig 3: Inserting Special Tool (13 5 270) Into Fuel Line

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Establish fuel delivery pressure. Read off fuel delivery pressure IMIB (Integrated Measurement Interface Box) and compare with values in BMW diagnosis system.

Assemble engine.

Check fuel system for tightness.