Removing the high-pressure rail with injectors of, cyl. 4 to 6

Preliminary work

Refer to DEACTIVATING THE 48 V ELECTRICAL SYSTEM .
Refer to DISCONNECTING ALL BATTERY GROUND LEADS .
Refer to REMOVING THE ACOUSTIC COVER .
Refer to REMOVING THE SEAL FOR THE HOOD REAR .
Refer to REMOVING ACOUSTIC COVER AT REAR .
Refer to REMOVING ALL IGNITION COILS .
Refer to REMOVING THE HIGH PRESSURE LINE BETWEEN THE HIGH PRESSURE PUMP AND THE RAIL .

NOTE: RISK OF DAMAGE
Contaminant or foreign body .
Contamination can result in malfunctions, loss of function or leaks .

Adhere to the utmost cleanliness.
Protect components from contamination e.g. by covering.
Close off line connections with seal plugs.

NOTE: RISK OF DAMAGE
Damage to the ignition coil .
The silicone hose of the ignition coil must not be contaminated by fuel as this can lead to failure of the ignition coil .

When working on the fuel system, cover the ignition coils with suitable materials and remove where required.
Do not oil or grease the silicone tube of the spark plug socket. Do not use any protection or maintenance products (e.g. silicone spray, rubber care products, rust remover, etc.).

NOTE: RISK OF DAMAGE
Damage to the injector tips and Teflon ring .
Improper handling of the injector tips and Teflon ring can lead to malfunctioning of the injector .

Avoid mechanical contact with injector tip.
When exchanging Teflon ring, hands and work surface must be clean and free of oil. Do not use any lubricating agents.
Do not use fingernails to slide Teflon ring on.

NOTE: RISK OF DAMAGE
Damage to injectors .
Excessive force may damage the injector and this means having to replace the injector .

Twist the injectors with a torsional movement of maximum 13 Nm.

Prepare special tool 2 413 106 .

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Prepare special tool 2 358 417 .

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Prepare special tool 2 455 172 .

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Prepare special tool 0 496 106 (11 8 720) .

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Release the nuts (1).
Feed out the ground cable (2) and set it aside.
Feed out the cable duct (3) and set it aside.

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Unlock the lock (1) upwards in the arrow direction.
Press lock (1) together and release.
Detach the connector (2) from the injectors in the arrow direction.

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Unlock and release all connectors (1) of the injectors.

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NOTE: TECHNICAL INFORMATION
When the vehicle is under dusty/sandy operating conditions, the injector shafts must be cleaned before removing the injectors.
For additional information see: CLEANING THE CYLINDER HEAD IN THE AREA OF THE INJECTORS WITH SANDY/DUSTY CONTAMINATION .

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Blow out the injector shafts with slight pressure using air gun (1) before releasing the high pressure lines. At the same time, use an explosion-proof vacuum cleaner (2) to vacuum the dirt particles.
Release screws (M5x30) (1).
Remove the screws (M5x30) (1).
The screws (M5x30) (1) must not be reused.
Catch and dispose of leakage fuel with suitable materials.

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Unscrew the screws (M6x30) (arrows).
Remove the screws (M6x30) (arrows).
The screws (M6x30) must not be reused.
Remove rail (1) in upward direction.
The injectors remain in the cylinder head.

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Remove the seals (1).
The seals (1) are only required during the initial assembly at the plant and will not be installed again.

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NOTE: RISK OF DAMAGE
Damage to injectors .
Excessive force may damage the injector and this means having to replace the injector .

Twist the injectors with a torsional movement of maximum 13 Nm.

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If the specified value for the tensile force is exceeded: Replace injectors.
Use the special tool 2 358 417 for removing the injectors.
Special tool 2 358 417 ensures that the tensile force is not exceeded.

The special tool 2 358 417 consists of:
1. Threaded sleeves
2. Pull-out thread (left-hand thread)
3. Mount for the injectors
Unscrew the mount (1) for the injectors from the special tool 2 358 417 .

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Press in the lock (1) and remove the threaded sleeve (2) from the special tool 2 358 417 .

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Affix all the injector mounts (1).
The mount (1) is not locked if the lever (2) is on the top.

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Turn the mounts (1) by 90° in arrow direction and lock the lever (2) downwards in arrow direction.

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NOTE: RISK OF DAMAGE
Damage to injectors .
Excessive force may damage the injector and this means having to replace the injector .

Do not use the puller plate as a support.

Attach special tool 2 358 417 to cylinder head.
Hand-tighten the bolts (arrows).

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NOTE: TECHNICAL INFORMATION
The extraction thread is a left-hand thread.

Screw in all the pull-out threads (1) on the special tool 2 358 417 fully.

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Slide in the threaded sleeves (1) again and screw them fully onto the mounts for the injectors.
Tighten the screws (arrows) on the special tool 2 358 417 with 5 Nm .

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Adjust the torque wrench (1) to 13 Nm in a clockwise direction .
Turn torque wrench (1) in clockwise direction with special tool 0 496 106 (11 8 720) until the injector is pulled out.

NOTE: TECHNICAL INFORMATION
If the torque wrench makes a crack when the injector is pulled out, the injector must be replaced .

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Disassemble all injectors individually.
Before removing the special tool 2 358 417 with the injectors, check if all the injectors were completely pulled out of the cylinder head.
This can be recognized by the completely visible threads of the threaded sleeves (1).
Loosen screws on special tool 2 358 417 .

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Carefully remove the special tool 2 358 417 with the injectors (1) vertically upwards from the cylinder head.
Place the combination of the special tool 2 358 417 and the injectors (1) flat onto a clean folding table.

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NOTE: The description is provided only at one component. The procedure is the same for all other components.

Unlock lock (1) of the mount upwards in the arrow direction.

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Turn the unlocked mount (1) by 90° in arrow direction.
Release and remove the injector downwards in arrow direction.

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