13 31 035 Removing and Installing or Replacing Fuel Feed Line (N14)

13 31 035 Removing and installing or replacing the fuel delivery line (N14, N18)

Special tools required:







WARNING:
Disconnect negative battery terminal (risk of fire due to short circuit on dismantling).
Carry out installation work on fuel system only with coolant temperature below 40°C.







IMPORTANT:
Wear protective face mask.
Fuel can emerge spontaneously at high speed when the fuel delivery line is released.







IMPORTANT:
Adhere to conditions of absolute cleanliness when performing repair work on the fuel system.
Introduced contaminants can cause malfunctions in the system.
- Do not allow any dirt particles or foreign bodies get into the system
- Remove all traces of dirt contamination before dismantling lines or separate components
- Use only fluff-free cloths
- Seal all fuel system openings with protective caps or plugs







IMPORTANT:
When working on the oil, coolant or fuel circuit, you must protect the alternator against dirt contamination.
Cover alternator with suitable materials.
Failure to comply with this procedure may result in an alternator malfunction.







Necessary preliminary work:
- remove sound generator







Recycling:
Fuel escapes when fuel lines are detached.
Catch and dispose of escaping fuel.
Observe country-specific waste disposal regulations.







Place special tool 13 0 250 on fuel delivery line (1), positioning retaining lugs of tool in recesses in quick-release coupling (4).
Secure special tool 13 0 250 by means of knurled screw (5).

WARNING: Place a cloth over fuel delivery line (1) and high pressure pump (2).

To unlock, push fuel delivery line (1) towards high pressure pump (2), then detach in direction of arrow.
Remove special tool 13 0 250 and cloth.
Close off fuel line connection of high pressure pump with a matching plug from special tool set 32 1 270.
Close off fuel delivery line with special tool 13 5 161.

Installation note:
Retaining lugs of lock must not be damaged. A fuel line with damaged retaining lugs must be replaced.
Fuel delivery line (1) must snap audibly into place.'







Unlock and disconnect fuel delivery line (1).
Close off fuel line (2) with special tool 13 5 162.







Close off fuel delivery line with special tools (1) 13 5 161 and (2) 13 5 162.







Release retaining tabs (1) and remove fuel delivery line (2).

Installation note:
Ensure the fuel delivery line (2) is installed correctly (no chafing points).
Make sure retaining tabs (1) latch correctly.







Assemble engine.
Check fuel system for tightness.
Check function of DME.