Hiss from brake pedal.

[uriel]

Hi,

Yesterday I noticed that as I press the brake pedal there is a slight hiss, like air escaping. Haven't had a chance to have a proper look yet. Brakes still act and feel as normal. Perhaps it's always been there and I've never noticed over the engine/road noise etc.

If I turn off the engine and pump the pedal a few times the noise will stop as the pedal stiffens.

Possible leak in the pipe going to the servo?

Any thouhgts?

Thanks

Tony

[digga951]

Hello,

I think that my wedge does this too, and I assumed that it was just air escaping from the rubber gaiter in the foot well when it is compressed. As the pedal gets harder after being pressed a few times, the gaiter doesn't get compressed as much so less air escapes, reducing the "hiss".

If this is the cause, then I would say that theres nothing to worry about as the rubber gaiter just stops dirt from getting into the system etc.

Dan.

[cbemoore]

Or it could be a leaky servo.

Best to get someone to press the brake pedal while you stick your head under the bonnet. If you can hear it from the drivers seat, you should be able to trace it fairly easily.

[montegogt]

Had that on a Fiesta once. That was just the gaiter letting in the noise of the servo at work