13 53 240 Replacing complete injection pipe (N52/N52K)

Special tools required: 

• 13 5 281 

See FUEL SYSTEM - SPECIAL TOOLS (N51, N52K) .

Necessary preliminary tasks: 

• Read out fault memory of DME control unit
• Switch off ignition
• Remove clean air pipe  if applicable.
• Remove ignition coil cover  . See 11 00 REMOVING AND INSTALLING/REPLACING ACOUSTIC COVER (N52/N52K) .

Recycling 

Fuel escapes when fuel line is detached. Catch and dispose of escaping fuel.

Observe country-specific waste-disposal regulations.

N52K only: 

Unclip plug connection (1) from holder (2) and disconnect.

Unclip wiring harnesses from holder (2) and connector strip (3).

Disconnect holder (2) from injection pipe.

Fig 1: Identifying Wiring Harnesses From Holder And Connector Strip

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Remove protective cap from compressed air valve.

Fig 2: Locating Dust Cap

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Connect compressed air line (1) to compressed air valve.

Blow fuel back into tank with a short blast of compressed air (max. 3 bar).

Fig 3: Identifying Compressed Air Line

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Unlock and detach fuel line (1).

Detach connector strip (2) in direction of arrow.

Release screws.

Tightening torque 13 53 1AZ, see 13 53 FUEL INJECTION NOZZLES AND PIPES

Remove injection pipe (3).

Fig 4: Detaching Connector Strip

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Lever out retainers (1).

Pull fuel injectors out of injection pipe.

Installation: 

Replace sealing rings on fuel injectors and coat with antifriction rubber coating.

Fig 5: Identifying Retainers

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