Brake problems...im going nuts!
Thread Starter
Le Mans Master
Joined: Jun 2003
Posts: 5,135
Likes: 71
From: Umeå Sweden
Brake problems...im going nuts!
Well i have changed almost everything on my brakes,i have wilwood front calipers,new lines,new master cylinder and restored bak calipers.i also removed the brake proportioning valve as suggested by Norval.
I bench bled the master before mounting it to the car.
Now when i bleed the system i get a spongy pedal,havent gotten it to be hard,then when i let the car sit awhile the pedal goes to the floor again,it was the same before i changed the master...
what tha heck is wrong? im going nuts
I bench bled the master before mounting it to the car.
Now when i bleed the system i get a spongy pedal,havent gotten it to be hard,then when i let the car sit awhile the pedal goes to the floor again,it was the same before i changed the master...
what tha heck is wrong? im going nuts
Thread Starter
Le Mans Master
Joined: Jun 2003
Posts: 5,135
Likes: 71
From: Umeå Sweden
Is the bleeding order important when i have removed the proportioning valve?
i have tried too bleed in order and its the same
how much air must there be to cause this??
it cant be much?
i have tried too bleed in order and its the same
how much air must there be to cause this??
it cant be much?
Instructor
Joined: Sep 2002
Posts: 198
Likes: 0
From: VA BEACH VA
I had the same problem on my 76 coupe. After changing all of the brake lines and the master cyl 4 times someone suggested i check the rotors for true. Sure enough, the rear rotors had been drilled out and replaced and were way out of true. As they turn in the caliper they draw in air thus giving the spongy or no pedal. we cut up an aluminum Coke can to make shims to go behind the rotors and never had another problem. The Coke can shims were still there 3 years later when I got rid of the car.
Pro
Joined: Sep 2002
Posts: 620
Likes: 2
From: San Antonio TX
Originally Posted by stingraymaniac
the strange thing is that if i just let the car sit the pedal goes to the floor also.no need to move the car
OK, no problem, got my daughter on the brake pedal and did them again.
Worked well for a few more minutes.
Well, turns out that one of my bleeder valves had a burr on the sealing surface and would not properly seal. It was allowing air into the system. I deburred it with some emory cloth, cleaned it up with some acetone, put it back in, and they now work great.
Don't know that this is your problem, but it's often the smallest things that cause the biggest headaches.
Good luck.
BTW, I think you would still follow bleed order regardless of the distribution/pressure/proportioning block.
Last edited by cchristo; May 22, 2006 at 10:59 AM.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Instructor
Joined: May 2006
Posts: 168
Likes: 0
From: Florence NJ
Great little tool
I had many problems bleeding my brakes on my 74 corvette. I would always loss the "hardness" to the pedal after a month or so. I bought this great tool from ecklers and never had a problem again. http://www.ecklers.com/product.asp?p...&dept%5Fid=120