brake booster quacking like a duck

[minimike]

So I replace my booster and master with a used item I had on hand. The booster give a bit of a honk like a duck
after the pedal is released. Also I get no brake fluid to the rear on bleeding.

Any ideas?

[divace73]

is it duck or wabbit season?

There is a release of air when the brake pedal is released, it could be the the sound is muffled in a way that it makes that sound?

check/change the rear hose (I'd recommend changing all the hoses to braided) aged hoses can often collapse internally looking fine from the outside.

If I ever have to do anything with brakes where I need to re-bleed I give the whole system a good overhaul.

[minimike]

I"m gonna blow some compressed air through the system about 3 lbs to see if I can flush out the rears. I too usually go over the whole system. I did replace rear calipers with rebuilds I had on the shelf, and fronts also were rebuilt by me. Not new to cars or brakes, just never heard that quack. Also gonna order the 5 hoses and replace them all. And going to check the bias valve to make sure it's not crudded up or mal functioning.

[seabeelt]

If the rear wheels were hanging when you tried to bleed, the proprtioning valve may be preventing fluid from getting to the calipers ( Support wheels from the axel)???