13 53 240 Replacing complete fuel rail (N52/N52K)

Special tools required: 

• 13 5 281

Necessary preliminary tasks: 

• Read out fault memory of DME control unit
• Switch off ignition
• Remove clean air pipe
• Remove acoustic cover. See Figure.

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: Plug Connections And Holder

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Remove protective cap from compressed air valve.

Fig 2: 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: Compressed Air Line

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Unlock and detach fuel line (1).

Detach connector strip (2) in direction of arrow.

Release screws.

For tightening torque refer to 13 53 1AZ in 13 53 FUEL INJECTION NOZZLES AND PIPES (N52 / N51) .

Remove injection pipe (3).

Fig 4: Fuel Line, Connector Strip, Injector Pipe And Removal Direction

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Lever out retainers (1).

Pull fuel injectors out of injection pipe.

Close off fuel hose with special tool 13 5 281.

Fig 5: Identifying Special Tool

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Installation: 

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

Fig 6: Fuel Injector Retainer And Removal Direction

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