Hissing when you brake...

Guys,


I have changed my rear brakes, and it started to hiss when I try to press brakes espcailly if I'm on a declined ground.

it sounds like "ssssssssssssssssssss" whenever , So any body have any clue about this. Is it the new brakes problem or anything else.

[MikeTangas]

It would help if you let us know what year and model you are talking about.

I'm betting it is a vacuum leak in the vacuum booster, possibly from a bad diaphram. Does it hiss whenever you have your foot on the brake, but not hiss anytime else? Does the pedal feel different since the hissing started?

About the car model it's E200 92.

About the brakes, yes some times when I'm driving I hear the hissing sound on the brakes and when I press brakes a little bit the sound disappears.

But Whenever I press brakes I hear hissing, espcailly if I'm on a high speed or declining ground.

The sound started when I have changed the rear brakes and the rear brake drums.

About the pedal, I think it's the same nothing changed.

johnson-rod???


how is looks like, is its shape like "J" letter!!

and why it needs experts do it, it is easily damaged.