disk brake conversion

I installed a disk brake kit on the front of my 70 nova with a new master cylinder and power booster. When i press on the brakes it sounds like i have a air leak under the dash. What could be causing this???? Any help would be very thankful.

if it's when the engine is running it is more than likely a vaccum leak caused from a bad brake booster

Did you replace the vacuum hose when you installed the new booster? You could have a loose hose, or a cut in the hose. Or a bad booster, like mentioned before. Even new ones are sometimes bad. When the car's running, is the brake pedal hard to push? Test your booster - Turn the car off, pump the pedal to remove remaining vacuum, and with your foot on the pedal, start the car. You should feel the pedal drop just a little from the incoming vacuum. If not, then I'm thinking you have booster problems. If your hearing a hissing though, I'd say you have a vacuum leak somewhere.

The pedal is alittle stiff. I put a new booster on the car when i did the conversion. I also replaced the vaccum line that runs to the booster. But there is a hiss when i press the brake pedal. I will try what you said.

how about if u try to suck all the air possible!!
that will help!!

how about if u try to suck all the air possible!!
that will help!!



if that was a joke... you need practice.


that was lame.

Definently a bad joke. haha, so bad it was actually funny.

Rennskii