Bench Bleeding Question
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Joined: Aug 2008
Posts: 9
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From: Mantua OH
Bench Bleeding Question
I recently bench bled my master cylinder and after doing so I am wondering if I need a new master cylinder. From what I read I was under the impression that the piston should have gotten harder and harder to push in with a screw driver as the air bubbles were released. It got a little harder put it was still pretty easy to do. After I re-installed it I bled all the brake lines and took the car for a test drive and it still feels like it takes longer to stop than it should.
When bench bleeding a master cylinder how hard should it get to push in the piston?
And on a '81 vette how responsive should the brakes be? Should they lock up when the brake pedal is slammed or is it normal for it to brake slower than new cars?
Thanks everyone!!
When bench bleeding a master cylinder how hard should it get to push in the piston?
And on a '81 vette how responsive should the brakes be? Should they lock up when the brake pedal is slammed or is it normal for it to brake slower than new cars?
Thanks everyone!!
Melting Slicks
Joined: Apr 1999
Posts: 2,675
Likes: 13
From: Sudbury MA
Sounds like you did the bench bleeding correctly but that you have air in the brake lines to the wheels or maybe in one or several of the calipers.
These cars can SOMETIMES be tricky to bleed and get a firm pedal but it certainly can be done.
I have done it many times and end up with a rock hard pedal when finished; don't give up.
Kurt
These cars can SOMETIMES be tricky to bleed and get a firm pedal but it certainly can be done.
I have done it many times and end up with a rock hard pedal when finished; don't give up.
Kurt
Race Director
Joined: Jul 2004
Posts: 12,705
Likes: 329
From: Scottsdale Arizona
Sounds like you did the bench bleeding correctly but that you have air in the brake lines to the wheels or maybe in one or several of the calipers.
These cars can SOMETIMES be tricky to bleed and get a firm pedal but it certainly can be done.
I have done it many times and end up with a rock hard pedal when finished; don't give up.
Kurt
These cars can SOMETIMES be tricky to bleed and get a firm pedal but it certainly can be done.
I have done it many times and end up with a rock hard pedal when finished; don't give up.
Kurt
It took a while to get my 81 right but the feel, when I did, was slightly better than my 94 Saturn. The performance was much better than that car. When you get it all right, it should feel very sure. it should not make you nervous in any way.
