13 53 158 Removing and installing/replacing rail (Continental high-pressure pump) (N55)

Special tools required:

WARNING: Observe warning on cylinder head cover.
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.

IMPORTANT: Wear full face guard and protective gloves.
Fuel can emerge spontaneously at high speed when the high pressure line is released!

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 before removing 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 tasks:

Remove PRESSURE LINES
Remove INTAKE SILENCER HOUSING

Recycling:

Fuel escapes when fuel lines are detached.

Catch and dispose of escaping fuel.

Observe country-specific waste disposal regulations.

Release wiring harnesses (1) from rail and lay to one side.

Undo clamps (2) from rail.

Fig 1: Identifying Wiring Harnesses And Clamps

Courtesy of BMW OF NORTH AMERICA, INC.

Slacken nut (1).

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

Release screws (3).

Remove rail (4).

Fig 2: Identifying High-Pressure Sensor Connector Rail And Nut

Courtesy of BMW OF NORTH AMERICA, INC.

Installing rail (without decoupling):

Rail installation is described separately from removal.

Install (4) rail while manually tightening nuts (3) and bolts (1).

NOTE:

Rail must still be displaceable on cylinder head.
Nut (2) must be able to be screwed on easily by hand.

Push on connector for high-pressure sensor (2).

Fig 3: Identifying High-Pressure Sensor Connector Rail And Nut

Courtesy of BMW OF NORTH AMERICA, INC.

Fitting pressure lines:

(Same procedure for all pressure lines)

Install pressure line (1). Tighten nuts (2) hand-tight only.

IMPORTANT: Connect pressure line (1) without tension only.
To ensure distortion-free installation of the pressure line and to avoid damaging the thread, it must be possible for both nuts to be screwed on easily by hand!

Fig 4: Identifying Pressure Line And Nuts

Courtesy of BMW OF NORTH AMERICA, INC.

Reinstall line damper (3).

Tighten down screws (1).

Tightening torque 13 53 2AZ .

Tighten nut (2).

Tightening torque 13 53 8AZ .

Fig 5: Fuel Rail Mounting Screws And Nuts

Courtesy of BMW OF NORTH AMERICA, INC.

Adhere to tightening sequence:

First tighten down nut (1) on injector.
Then tighten down nut (2) on rail.

Tighten down nuts with special tool 3 13 0 161 .

IMPORTANT: Reset special tool in early to avoid bending pressure lines.

Tightening torque 13 53 9AZ .

Fig 6: Identifying Injector And Rail Nut

Courtesy of BMW OF NORTH AMERICA, INC.

Installing rail (with decoupling):

Rail installation is described separately from removal.

If an injector line is being replaced, the corresponding injector hold-down device must be released.

Installation note:

Before reinstalling the rail, the decoupling element and sleeves (1) must be replaced.

Fig 7: Identifying Decoupling Element And Sleeves

Courtesy of BMW OF NORTH AMERICA, INC.

Install rail (4) while tightening nuts (1) and bolts (3) hand-tight only.

NOTE:

Rail must still be displaceable on cylinder head.
Nut (1) must be able to be screwed on easily by hand.

Fig 8: Identifying High-Pressure Sensor Plug, Rail And Screws

Courtesy of BMW OF NORTH AMERICA, INC.

Fitting pressure lines:

(Same procedure for all pressure lines)

Install pressure line (1). Tighten nuts (2) hand-tight only.

When reinstalling lines, lubricate the thread and the nut facing of the ball! When they are installed for the first time the nuts have a coating of lubricant (only effective once). Penetration of lubricant into the fuel-conducting area should be avoided.

Fig 9: Identifying Pressure Line And Nuts

Courtesy of BMW OF NORTH AMERICA, INC.

Reinstall rubber mount (3).

Procedure for loose injector hold-down device (this operation can be skipped if the injector hold-down device has not been loosened).

Firstly tighten screw (1).

Tightening torque 13 53 6AZ .

Then tighten down screw (2).

Tightening torque 13 53 6AZ .

Fig 10: Identifying Holding-Down Element And Screw

Courtesy of BMW OF NORTH AMERICA, INC.

Adhere to tightening sequence:

1 . Tighten screws (1).
Tightening torque 13 53 2AZ .
2 . Tighten nut (2).
Tightening torque 13 53 8AZ .

Fig 11: Fuel Rail Mounting Screws And Nuts
Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: Reset special tool in early to avoid bending pressure lines.
Tighten down nuts with special tool 3 13 0 160 .

Adhere to tightening sequence:

3 . First tighten nut (1) on injector.
4 . Then tighten nut (2) on rail.
Tightening torque 13 53 9AZ .

Fig 12: Identifying Injector And Rail Nut
Courtesy of BMW OF NORTH AMERICA, INC.
5 . Tighten nut (1).
Tightening torque 13 53 8AZ .
6 . Tighten nut (2).
Tightening torque 13 53 8AZ .
7 . Tighten screw (3).
Tightening torque 13 53 10AZ .

Push connector for high pressure sensor on.

Fig 13: Identifying High Pressure Line Screws And Nuts

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.

Check fuel system for tightness.

Check function of DME.