13 51 017 Removing and installing/replacing high pressure pump (Continental) (N55)

Special tools required:

WARNING: Observe warning on cylinder head cover.
Disconnect NEGATIVE BATTERY TERMINAL (risk of fire due to short-circuiting 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: Ignition coils must not be contaminated by fuel.
The resistance of the silicone material is reduced significantly by contact with fuel, which may cause the ignition coil to fail!
Cover ignition coil with suitable means.

Necessary preliminary tasks:

Recycling:

Fuel escapes when fuel lines are detached.

Catch and dispose of escaping fuel.

Observe country-specific waste disposal regulations.

Release screws (1) of holder (2). Take off holder.

Fig 1: Identifying High Pressure Pump Holder And Screws

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Release screws (1) below cable channel (2).

Replace aluminum screws.

Installation note:

Adhere to tightening/torque sequence.

Fig 2: Identifying Cable Channel And Screws

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Disengage connector (1) from the fuel low-pressure sensor, oil temperature sensor and the high pressure pump and remove.

Fig 3: Identifying Fuel Low-Pressure Sensor Connector

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Remove oil temperature sensor (1).

Tightening torque 13 62 7AZ .

Fig 4: Identifying Oil Temperature Sensor

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WARNING: Wear full face guard and protective gloves.

Release fuel lines and seal off with special tools (1) 13 5 161 and (2) 13 5 162 .

Fig 5: Identifying Special Tools (13 5 161) And (13 5 162)

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Release nut (1) on high pressure pump.

Remove feed line (2).

Installation note:

Adhere to tightening/torque sequence.

Fig 6: Identifying High Pressure Pump Nut And Feed Line

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Seal feed line with matching plug from special tool kit 32 1 270 .

Fig 7: Identifying Special Tool (32 1 270)

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Release nut (1) on high pressure line.

Fig 8: Locating High Pressure Line Nuts

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Release nut (1) of high pressure line on rail.

Fig 9: Identifying High Pressure Line Rail Nut

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Seal fuel line connections of high pressure pump (1) with matching plugs from set of special tools 32 1 270 .

Fig 10: Identifying High Pressure Pump And Special Tools (32 1 270)

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Release bolts with special tool 11 8 610 .

Detach high pressure pump (1) and remove.

Engine oil can escape when pump is detached; have a cleaning cloth ready.

Fig 11: Locating High Pressure Pump Bolts

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Installing high pressure pump:

Installation of high pressure pump is described separately from removal.

Replace sealing ring (1).

Clean contact surfaces.

Fig 12: Identifying High Pressure Pump Sealing Ring

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When installing, turn high pressure pump (1) if necessary in direction of arrow until bore holes for screws are flush.

Fig 13: Turning High Pressure Pump

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IMPORTANT: Tighten screws of high-pressure pump (1) with special tool 11 8 610hand-tight only .
It must still be possible to turn the high pressure pump at the flange!
This helps ensure that no strain is produced when the high pressure line is tightened.
If reusing pressure line, lightly grease threads of pressure connections. Threads of new pressure lines are already coated.

Fig 14: Identifying High-Pressure Pump Screws

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Tighten nut (1) of high pressure line only hand-tight .

Fig 15: Identifying High Pressure Line Rail Nut

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Tighten nut (1) of high pressure line only hand-tight .

Fig 16: Locating High Pressure Line Nuts

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Install feed line (2) at the high pressure pump.

Only hand-tighten nut (1).

Fig 17: Identifying High Pressure Pump Nut And Feed Line

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When high pressure pump (1) has turned into position and is thus pre-assembled without strain with the high pressure line, tighten screws of high pressure pump (1) with special tool 11 8 610 .

Tightening torque 13 53 1AZ .

Fig 18: Locating High Pressure Pump Bolts

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Tighten down nut (1) with special tool 13 5 020 .

Tightening torque 13 53 8AZ .

Fig 19: Identifying High Pressure Line Rail Nut

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Tighten nut (1).

Tightening torque 13 53 8AZ .

Fig 20: Identifying High Pressure Line Nut

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Tighten down nut (1) with special tool 13 5 020 .

In doing so, hold against low-pressure sensor flange.

Tightening torque 13 53 7AZ .

Fig 21: Identifying Low-Pressure Sensor Flange Nut

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Install oil temperature sensor (1).

Tightening torque 13 62 7AZ .

Fig 22: Identifying Oil Temperature Sensor

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Position cable channel (1) in front of threaded holes (2) and tighten screws hand-tight .

Replace aluminum screws.

Fig 23: Identifying Cable Channel And Threaded Holes

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Tighten screws (1) below cable channel (2).

Tightening torque 13 53 10AZ .

Replace aluminum screw.

Fig 24: Identifying Cable Channel And Screws

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Install connector (1) of fuel low-pressure sensor, oil temperature sensor and high pressure pump.

Fig 25: Identifying Fuel Low-Pressure Sensor Connector

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Install holder (1) for tank vent valve.

Install tank vent valve in holder.

Fig 26: Identifying High Pressure Pump Holder And Screws

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Assemble engine.

Check fuel system for tightness.

Check function of DME.