13 53 332 Removing and installing/replacing feed line (S63)

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Special tools required:

13 5 160

WARNING: Disconnect NEGATIVE BATTERY TERMINAL (risk of fire due to short circuit on dismantling).
Electric fuel pump starts up automatically when door is opened!
Carry out installation work on fuel system only with coolant temperature below 40 °C.

Wear safety goggles.

Wear protective gloves.

IMPORTANT: Adhere to conditions of absolute cleanliness when working on the high-pressure fuel system.

Introduced contaminants can cause malfunctions in the system!

Do not allow any dirt particles or foreign bodies to get into the system.
Remove all traces of dirt contamination before removing lines or separate components.
Use only fluff-free cloths.
Seal all fuel system openings with protective caps or plugs.

Necessary preliminary tasks:

Remove left INTAKE FILTER HOUSING
Remove BOTH AIR DUCTS .
Remove clean air pipe on left and right. See REMOVING LEFT CLEAN AIR PIPE and REMOVING RIGHT CLEAN AIR PIPE .

Recycling:

Fuel escapes when fuel lines are detached.

Catch and dispose of escaping fuel in a suitable container.

Observe country-specific waste disposal regulations.

Release connector holder (1) from bracket and place to one side.

Fig 1: Identifying Connector Holder

Courtesy of BMW OF NORTH AMERICA, INC.

Unlock and disconnect fuel delivery line (1).

Seal fuel lines with special tool 13 5 160 .

Release screw (2).

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

Fig 2: Identifying Special Tool, Screws, Pull-Out Thread, And Threaded Sleeves

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

Fig 3: Sealing Fuel Lines With Special Tools

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Unlock and pull off connector (1) from alternator.

Release nut at bottom of cover (2).

Tightening torque 12 41 1AZ .

Remove positive battery cable from alternator and place to one side.

Fig 4: Identifying Alternator Connector And Cover

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Release nuts (1) on retaining clips.

Tightening torque 13 53 7AZ .

Release fuel feed line (2) on high-pressure pump.

Catch and dispose of escaping fuel.

Feed out and remove fuel feed line (3).

Fig 5: Identifying Fuel Feed Line And Retaining Clip Nut

Courtesy of BMW OF NORTH AMERICA, INC.

Installation note:

Observe tightening sequence.

1. Fit fuel feed line.
In so doing, apply only hand-tight force to tighten screw connections!
2. Apply tightening force to fuel delivery line at high pressure pumps.
Tightening torque 13 53 4AZ .
3. Apply tightening force to fuel delivery line at cylinder head cover.
Tightening torque 13 53 6AZ .
4. Tighten down retaining clips.
Tightening torque 13 53 7AZ .

Assemble engine.

Check fuel system for tightness.

Check function of DME.