1353332 Removing and installing/replacing feed line (N63): Recycling

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Fuel escapes when fuel lines are detached.

Catch and dispose of escaping fuel in a suitable container.

Observe country-specific waste-disposal regulations.

Release clamps (1) and (2).

Replace clamps (2).

Detach both charge-air ducts (3) and remove.

Check gaskets on turbocharger, replacing if necessary.

Fig 1: Identifying Air Duct With Mounting Clamp

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Picture shows the left side, the procedure for the right side is identical.

Detach hoses (1) from clean-air pipe.

Release screw (2).

Tightening torque 13 71 1AZ .

Detach clean-air pipe (3) in direction of travel from turbocharger.

Check seal on clean-air pipe, replacing if necessary.

Fig 2: Identifying Clean Air Pipe With Hoses And Mounting Screws

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Unlock and disconnect fuel feed line (1).

Seal fuel lines with special tools 13 5 160 and 13 5 162.

Unlock and disconnect plug (2) on fuel low-pressure sensor.

Release fuel feed line (3) on high-pressure pump.

Tightening torque 13 53 4AZ .

Release bolts (4).

Tightening torque 13 53 6AZ .

Catch and dispose of escaping fuel.

Fig 3: Identifying Fuel Feed Line With Plug And Mounting Bolts

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Seal fuel lines with special tools (1) 13 5 160 and (2) 13 5 162.

Fig 4: Sealing Fuel Lines Using Special Tools (13 5 160 And 13 5 162)

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Release fuel feed line (1) on high-pressure pump.

Tightening torque 13 53 4AZ .

Catch and dispose of escaping fuel.

Fig 5: Identifying Fuel Feed Line On High-Pressure Pump

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Release nuts (1) on retaining clips.

Tightening torque 13 53 7AZ .

Feed out and remove fuel feed line (2).

Fig 6: Identifying Fuel Feed Line With Mounting Nuts

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Installation:

Observe tightening sequence.

Fit fuel feed line.
In so doing, tighten screw connections hand-tight only.
Tighten down fuel feed line (1) on high-pressure pumps to torque (2) and with crowfoot wrench (3).
Tightening torque 13 53 4AZ .
Tighten down lugs on fuel low-pressure sensor.
Tightening torque 13 53 6AZ .
Tighten down retaining clips.
Tightening torque 13 53 7AZ .

Fig 7: Tightening Fuel Feed Line On High-Pressure Pumps Using Crowfoot Wrench
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Assemble engine.

Check fuel system for leaks.

Check function of DME.