brake question
Thread Starter
Advanced
Joined: Aug 2008
Posts: 70
Likes: 1
From: corpus christi tx
brake question
my 72 is giving me probs, i replaced all calipers, new brake booster..
my pedal is frim,when the car is off, but as soon as i turn the car on,the pedal goes to the floor.we put a new master clyinder in her five years ago...and all this time its been sitting ,can it go bad just sitting in the car five years....should i buy another one???
my pedal is frim,when the car is off, but as soon as i turn the car on,the pedal goes to the floor.we put a new master clyinder in her five years ago...and all this time its been sitting ,can it go bad just sitting in the car five years....should i buy another one???
Le Mans Master
Joined: Jan 2000
Posts: 8,918
Likes: 27
From: New Hill NC
my 72 is giving me probs, i replaced all calipers, new brake booster..
my pedal is frim,when the car is off, but as soon as i turn the car on,the pedal goes to the floor.we put a new master clyinder in her five years ago...and all this time its been sitting ,can it go bad just sitting in the car five years....should i buy another one???
my pedal is frim,when the car is off, but as soon as i turn the car on,the pedal goes to the floor.we put a new master clyinder in her five years ago...and all this time its been sitting ,can it go bad just sitting in the car five years....should i buy another one???
Racer
Joined: Mar 2008
Posts: 428
Likes: 0
Yes, the old pump it up, hold it down, open and close the bleeder without your helper taking their foot off the pedal procedure has been around for a long time. Without a helper around, I open the bleeder and let gravity help me. When flushing a system, I use a pressure bleeder which takes more setup time but, it works really well.
Advanced
Joined: Sep 2005
Posts: 54
Likes: 0
From: Cheshire CT
The Motive Pressure Bleeder works great and you don't have to bother anyone to help you pushing the brake pedal. Check out the link below.
http://store.nexternal.com/shared/St...unt2=895118355
http://store.nexternal.com/shared/St...unt2=895118355
Instructor
Joined: Dec 2007
Posts: 245
Likes: 2
From: Jersey shore NJ
I have read some other posts that said that if your peddle is hard when the car is off then goes soft when the car is on that the rod that comes out of the power booster may be too long . it should be adjustable.
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Drifting
Joined: Jun 2007
Posts: 1,404
Likes: 1
From: Ansonia/NYC CT
If the brakes are firm when car is off, but then soft when car is on, it means that it's most likely NOT your power booster, as the brakes being soft while the booster is working, but hard when it's not on, is a sign.
Another easy way to check is to run the car for a minute, shut it off, then unplug the hose on the power booster. If air rushes out, that means it pretty much works. All it is is a pressure tank.
I'd say just bleed your system. Also, if the MC has sat all those years, you'll probably need a new one.
Another easy way to check is to run the car for a minute, shut it off, then unplug the hose on the power booster. If air rushes out, that means it pretty much works. All it is is a pressure tank.
I'd say just bleed your system. Also, if the MC has sat all those years, you'll probably need a new one.
Drifting
Joined: Jun 2007
Posts: 1,404
Likes: 1
From: Ansonia/NYC CT
Take your time, and bench bleed it properly.
I think, in the past 4 days or so, there have been something like 6 threads all dealing with brake woes, most of them stemming from not bleeding them properly.
Drifting
Joined: Jun 2007
Posts: 1,404
Likes: 1
From: Ansonia/NYC CT
You fill it with fluid, then connect tubes to the two out spouts, and run that tube back into the MC, so you don't run out of brake fluid.
Then, get the thing in a table vise, and stick a phillips head inside, and press on it till it goes in about an inch or so. This pumps the fluid through, and works out air bubbles. I also sat mine over night, and tapped on the bottom periodically through out the day, to make SURE there were bubbles. With brakes, I am of the mind that you can never be too ****.
Then, get the thing in a table vise, and stick a phillips head inside, and press on it till it goes in about an inch or so. This pumps the fluid through, and works out air bubbles. I also sat mine over night, and tapped on the bottom periodically through out the day, to make SURE there were bubbles. With brakes, I am of the mind that you can never be too ****.