Ok, I have a 91 civic hatch and I did the full DA brake swap. My problem is, is that when I apply the brakes they work, but they don’t release. When I loosen one of the brake lines to see if it will releave the pressure from the brakes, it does. Now my question is should I replace the MC? thanks for help!
Could be the adjustment on the pushrod where the master cylinder meets the booster. I believe it is adjusted behind the brake pedal where it goes thru the firewall, you will see the locknut.
Ok, well I know where the booster goes into the wall, but I don’t know what you’re talking about when you say “adjust” the booster. I know where the lock pins go and the cotter (sp) pin slides thru the lock pin. I didn’t see anything where you can adjust it. But then again, I wasn’t looking for anything like that. I went out and bought a remaned master cylinder and now I’m going to bleed the brakes and try and see what that does.
Edit: I did some research and adjusting the booster will only adjust the pedal travel. I don’t know if that will help the problem so much!
I never said to adjust the booster, I said PUSHROD.
I told you where the adjustment is, its inside the car behind the brake pedal where it goes thru the firewall. You will see the locknut.
But then again, maybe you don’t have the right parts that work together anyway, you might need to do some more research for your application.
Also, is there any chance that just one of your wheels is locking up, meaning you just have one bad caliper that needs rebuilding. Jack up the car and check all wheels and see which ones are not releasing.
All of the calipers are locking up!! I’m going to get home and try to bleed the brakes tonight and see what happens. If that doesn’t fix the problem then I know what I need to do. I’ll take your advice. Thanks for the help man!
One reason that all the brakes would lock up, is because there is constant pressure on the master cylinder. One cause of this is a maladjusted pushrod. In other words, the brakes are constanly applied because the pushrod doesn’t have any freeplay, it is constanly pushing on the master cylinder.
So you’re saying if I adjust the lock nut that’s there then that would releave the pressure of the master cylinder?
do not adjust the pushrod… u will have a headache later i promise… if you swapped all 4 disks, im pretty sure you didnt put in the proportioning valve in from the integra? if not theres your problem. the rears were setup for drums on your civic where there is no prop valve.
The Helm’s manual which is the best source for info on Integra repair says to check the pushrod adjustment anytime a master cylinder is installed.
Think about it for a sec. You have your brake pedal, then you have an ADJUSTABLE metal rod that goes from the pedal to the master cylinder. If the rod is adjusted too long, the master cylinder is being pressed, just as if you had your foot pushing the pedal. I am not saying that this is his problem, but the pushrod adjustment SHOULD be checked.
As far as the proportioning valve being the cause for his brakes being locked up, I don’t see how it could. The proportioning valve is a metering valve to distribute the brake line pressure from the master cylinder to the various wheels. The proportioning valve will not put pressure to the wheels unless it has pressure from the master cylinder. It does not create pressure, only distributes it.
I am only trying to help and am no brake expert, but I have replaced my MC and did have to adjust the pushrod because my brakes were locking up just like the OP is experiencing. So I am speaking from my personal experience with my Integra. Once again, good luck.
I replaced the PV with all the other integra parts. What I don’t understand is that before the brakes are bled, the pedal can go all the way to the ground. But as soon as I bled the brakes the pedal woulnd’t move for shit! I haven’t had the time to do it, so I’m going to try and do that tonight.
Bled the brakes and they work great. Thanks for the help
I take that back. Not working so well. I don’t get it…I drove the car around the block and everything was good. But, on the way to work this morning, I had to stop on the road to fix the brakes, i.e break loose one of the brake lines, and then it would work fine until I hit the fucking brakes they would fuck up again?
I tried to adjust the bush rod, and I thought that did it, but would I need to adjust it even more then I did?
my buddy is biying my whole rear trailing arm assembly and stuff for his 92 hatch so let me know how this all went \
Will it mount all up? I don’t know. I know the front suspension is completely different. The shi sucks man. I can’t fiure out why my brakes lock up. I adjusted the bushrod, but maybe I didn’t adjust it enough. I’m going to try it again on my lunjch break.
Could it be the brake booster? When I was driving the brakes got all messed up again. So, when I was on the side of the road, I unplugged the vacuum hose that goes from the break booster to the inatke manifold and I pluuged it up with two bolts and now it works fine. Besides that fact that it take a lot more pressure to get the breaks down all the way. I’m thinking about replacing the break booster and seeing what that does. Does anything have any insite on this, maybe?