I would just like to know what are the symptoms of a failed or failing master cylinder.My break pedal just drops to the floor when I press on it with no braking effect. I had the brakes bled and it still was happening, so is is gone. I had already had a leaky rear caliper, but when my axle popped out the car wouldnt stay in park. So it rode the tow truck all the way home with the e-brake. when it got home all the brake fluid was empty in the container and the pedal was doing the above mentioned. I just want to know if that killed the cylinder or not so I can get one tomorrow. Thanks.

 

sounds like a bad master to me.

 

was you pumping the brake pedal with no fluid in the resevour? if so you might have put alot of air in system....if not ms is prob bad..look around in post's..there is a way t check ms by holding down brake pedal and shutting off the car...good luck

 

what exactly is the process of bench bleeding a master. also is there a alternative to a vacuum pump so that i can measure the legnth of the rod in the booster

 

mount master cylinder in a vise...with bench bleed kit(comes w/new master cylinder)plug all 4 lines and fill resevoir..run rubber hose's from all lines into rese voir and push clinder in with a phillips screwdriver slowly untill no bubbles appear in resevoir..then push it in 10 more times...be carefull hoses do not pull out of resevoir and allow air back in..

 

a whole lotof pumping was done with no fluid. can someone with search direct to the troubleshooting topic for the ms. it could very well be a whole lot of air. thanks in advance

 

yea definitely master cylinder

 

I'd say fix the leaking caliper. then bleed the brakes again. When you get around on all 4 corners, do it again. If any doubts bleed 1 more time. Might save you from having to repair something you don't need. Just my 2 cents.

 

thanks alot.problem solved. turned out there was a whole lot of air in the system. i bled the entire car 3 times, then the pedal was hard as a rock. dont need a mas cyl now.

 

How did air get into the system? You will experience this again soon.

 

hesaid he pumped pedal alot of times with the resevoir completely empty...