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Injectors

Injectors

Warning

Removal of the fuel rail involves partial dismantling of the car's fuel system. The following points must therefore be observed in connection with this work:

• Work only in a well-ventilated area! If approved equipment for the extraction of fuel vapour is available then make sure it is used.

• Wear suitable gloves! Prolonged contact with fuel can cause skin irritation.

• Keep a class BE fire extinguisher close by! Be mindful of the danger of sparks caused by short circuits and when connecting and disconnecting leads in electrical circuits.

• Smoking is strictly forbidden.


To remove


Important

Great cleanliness must be observed when working on the fuel rail and injectors. Wash valves, fuel rail and intake manifold and clean them with compressed air.



1. Remove the engine cover.

2. Remove the fuel pump fuse no. 32 while the engine is running. Turn off the ignition once the engine has stopped.

Refit fuel pump fuse no. 32.

3. Undo the fuel connections to the fuel rail with the special tool, part no. 83 95 261.

Wipe up excess fuel with a rag.

4. Detach the crankcase ventilation hoses.


5. Remove the dipstick and filler pipe and plug the pipe.

6. Remove the cover on the throttle disc. Detach the accelerator wire from the throttle spindle. Remove the accelerator wire and holder and bend to one side.

7. Undo the cable channel, 3 screws.


8. Unplug the injector connectors and place the cable channel to one side.


Important

Secure each injector clip with a narrow cable tie. Make sure it is positioned correctly and tighten it. Otherwise, there is risk of the injectors coming loose from the fuel rail during removal.


9. Clean the area round the injectors with compressed air.

10. Remove the 2 rail retaining bolts.

11. Disconnect the pressure regulator vacuum hose.

12. Carefully prise loose the rail with 2 crowbars or similar tools.

13. Carefully lift out the rail.

14. Plug the nozzle orifices.


To fit



1. Remove the plugs from the nozzles and lubricate the injector O-rings with acid-free vaseline, part no. 30 06 665.

2. Carefully lift the rail in place.

3. Fit the rail with fuel rail and injectors, 2 screws.

4. Connect the pressure regulator vacuum hose.

5. Remove the cable ties around the injectors.

6. Position the cable channel. Spray the injector connectors with Kontakt 61, part no. 30 04 520, and plug them in.

7. Fit the cable channel with the 3 screws.


8. Fit the accelerator wire and holder.


Adjust the accelerator wire.

9. Fit the cover over the throttle disc.

10. Fit the dipstick and filler pipe.

11. Attach the crankcase ventilation hoses.

12. Fit the fuel connections to the fuel rail.


13. Fit the engine cover.