13 31 029 Checking Fuel Pump Delivery Pressure

13 31 029 Checking fuel delivery pressure (N53, N54, N55, N63, 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.







Unscrew adapter (1) from 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.







Assemble engine.
Check fuel system for tightness.