13 53 330 Replacing fuel overflow pipes (N47 D20 O 1 with SCR)
Necessary preliminary tasks:
- Read out the fault memory of the DDE control unit.
- Switch off ignition.
- REMOVE rear acoustic cover and sound insulation on injector.
IMPORTANT:
It is essential to adhere to conditions of absolute cleanliness when carrying out repair work on the fuel system.
- Do not allow any dirt particles or foreign bodies to get into the system.
- Use only lint-free cloths.
- Remove all traces of dirt contamination before removing pipes or individual components.
IMPORTANT:
You must protect the alternator against dirt contamination before carrying out any repair work on the fuel circuit.
Cover alternator with suitable materials.
Failure to comply with this procedure may result in an alternator malfunction.
Cover alternator with suitable materials.
Failure to comply with this procedure may result in an alternator malfunction.
Pull out retainer (1) upwards.
Detach connection of leakage oil line (2) upwards.
IMPORTANT:
Coat sealing ring (1) with lubricant before connecting leakage oil line to injector.
Check sealing ring for damage, damaged sealing rings can cause malfunctions in the fuel pressure build-up.
The entire leakage oil line must be replaced if seal (1) is damaged.
Check sealing ring for damage, damaged sealing rings can cause malfunctions in the fuel pressure build-up.
The entire leakage oil line must be replaced if seal (1) is damaged.
Detach leakage oil lines from the injectors. Release leakage oil line from rubber grommet (1).
Detach leakage oil line from T-piece (2) of fuel line (close to high pressure pump).
Reassemble the vehicle.
Check fuel system for tightness.