Hisssssssin brakes

[terrible___1]

Rite just went 4a drive in me nova and pressed the brake pedal and i heard some hisssssin sound inside the car :?

Ive checked the vac pipe and the seal in2 the brake servo and the seal was broke so put new seal in but still get the hisssssssssin sound

CAN ANY1 HELP ME PLZ

[Euan]

might be your servo unit.

internal seal or somethin

it went with me when i slammed the breaks on once.

just get a new one from scrappy, think mine was a tenner.

[terrible___1]

how easy or hard is it 2change the sevo unit?i might just try changin the vac pipe.coz ive changed the seal but it still does it.