Unusual noises when pressing brake pedal

[Jimmy77]

Hi,

I have an R230 that today has started to emit a short squeal occasionally when braking. I tried braking when stationary with the engine running but in 'Park', and it still makes the noise as the pedal movement passes a certain point.

If I hold it at the point where it squeals, it continues for about two seconds and then stops abruptly. Also, if I press the pedal a bit harder, there's a relay in the front of the dash that clicks once, coming off the brake and then going back on and it will click again.

I'm thinking a vacuum leak that's being stopped by something, but with the relay as well, it's probably quite specific. Any ideas? Thanks.

 

[LostKiwi]

No idea what it is without being able to hear it but it's unlikely to be vacuum as the r230 doesn't use vacuum for the brakes.

 

[alexanderfoti]

I would say you have a faulty SBC pump, but hard to say unless It can be heard in person.

 

[John Laidlaw]

+1 SBC came to my mind too