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Pressure regulator (B235R)

Pressure regulator (B235R)

Warning

Removal of the fuel pressure regulator 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 vapours is available, be sure to use it.

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

• Keep a class BE fire extinguisher close at hand! Beware of sparks caused by short circuits and when connecting and disconnecting leads in electrical circuits.

• No smoking anywhere in the vicinity.


To remove


Important

To minimize any residual fuel pressure, remove the fuel pump fuse no. 32 while the engine is idling. Turn off the ignition once the engine has stopped.

Fit fuse no. 32.



1. Remove the engine cover.

2. Remove the turbocharger delivery pipe by:

• removing the hose from the turbo pressure sensor

• undoing the screw securing the by-pass pipe to the intake pipe on the turbo unit

• unplugging the connector to the temperature sensor on the turbocharger delivery pipe

• undoing the hose clips at the throttle body and the charge air hose

• undoing the screw securing the turbocharger delivery pipe to the bracket on the cylinder head.

3. Detach the vacuum hose from the fuel pressure regulator.

4. Unscrew the bolt and open the clamp.

5. Work loose the fuel pressure regulator.


To fit



1. Lubricate the fuel pressure regulator O-ring with acid-free vaseline, part no. 30 06 665.

2. Fit the regulator to the fuel rail and tighten the clamp.

3. Fit the regulator vacuum hose.

4. Fit the turbocharger delivery pipe.

5. Fit the engine cover.