Hi
Almost got the 300tdi rebuild finished but.....
the brake pedal is as hard as a brick, it has new pads/cylinders/fluid etc, I suspect the servo is knackered and I have a spare.
I checked the non return valve & the vacuum pipe, both ok

I noticed that on the vacuum pipe there it looks like there has been a small white fitting which looks broken, I am sure I can hear it hising when the engine is running, does anyone know what it is/was and where it should connect to please.