brakes not letting go
08-22-03, 10:20 AM
#1
Eats, Sleeps, Dreams Rotary
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brakes not letting go
Hi all,
Got a pain in the *** issue.
First, occasionally when I'd pull out of my driveway after the car sitting overnight the first time I pump my brakes I wouldn't get much brake, and the pedal would go down further than it should. Everything was fine after that.
Next start noticing my car pulling to the right a bit, and upon coasting to a stop in neutral the stop would be just a little abrupt, like I was pressing on the brake lightly.
Now it's gotten so when the brakes are warmed up it'll bite pretty hard even when I'm not pressing the pedal all. And when I do press it, I only get maybe 2" if that of pedal travel, and it's hard to press.
I let it sit for 10 minutes or so, and it's lightened up a bit, but still grabbing somewhat.
Last night I changed the pads in both front brakes and bled them. Pistons moved back somewhat easily. Sanded and cleaned the caliper pins to make sure there was some play.
It was easy to spin the front wheels. Started out driving and it was perfect. Did maybe five 35 mph medium stops with no issue. Then after the last one I put the car in neutral and instead of coasting I was slowing down. Got to the point where I'd actually use a little boost to maintain a constant speed. Pulled in a parking lot for 5-10 minutes and it loosened up a bit. Still there, but getting better.
Tonight I'm gonna bleed the rears, then the front again, and my clutch as well. Just to make sure all the air and old fluid is out.
After that I'm not too sure.. Caliper rebuild?
Help would be much appreciated!
Cavell
Got a pain in the *** issue.
First, occasionally when I'd pull out of my driveway after the car sitting overnight the first time I pump my brakes I wouldn't get much brake, and the pedal would go down further than it should. Everything was fine after that.
Next start noticing my car pulling to the right a bit, and upon coasting to a stop in neutral the stop would be just a little abrupt, like I was pressing on the brake lightly.
Now it's gotten so when the brakes are warmed up it'll bite pretty hard even when I'm not pressing the pedal all. And when I do press it, I only get maybe 2" if that of pedal travel, and it's hard to press.
I let it sit for 10 minutes or so, and it's lightened up a bit, but still grabbing somewhat.
Last night I changed the pads in both front brakes and bled them. Pistons moved back somewhat easily. Sanded and cleaned the caliper pins to make sure there was some play.
It was easy to spin the front wheels. Started out driving and it was perfect. Did maybe five 35 mph medium stops with no issue. Then after the last one I put the car in neutral and instead of coasting I was slowing down. Got to the point where I'd actually use a little boost to maintain a constant speed. Pulled in a parking lot for 5-10 minutes and it loosened up a bit. Still there, but getting better.
Tonight I'm gonna bleed the rears, then the front again, and my clutch as well. Just to make sure all the air and old fluid is out.
After that I'm not too sure.. Caliper rebuild?
Help would be much appreciated!
Cavell
08-23-03, 09:06 PM
#2
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Some old rubber lines can collapse on the inside and cause the rubber to form a 'check valve' type failure. You press on the brake and the pressure doesn't get relieved in the line. Are you running SS brake lines? Might be time to upgrade/replace your lines if you haven't done so.
08-24-03, 11:02 AM
#3
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ALWAYS BLEED THE FAREST WHEEL FROM YOU MASTER CYLINDER
always bleed your farest wheel from your master cylinder first. Did you check your brake piston for binding?? <---like hard to press in
08-26-03, 08:19 AM
#4
Eats, Sleeps, Dreams Rotary
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Pistons seemed ok when replacing my pads.
I bled them all the way you guys said, but no dice.
Then I used a turkey baster to get almost 100% of the fluid out of the reservoir, fill it up again, and bleed yet again. My back is killing me!
Did all 4 brakes again and so far that seemed to have fixed the problem. Driven for about a half hour with no locking up on me. I can even move the car with my foot outside the driver's door.
Thanks!
I bled them all the way you guys said, but no dice.
Then I used a turkey baster to get almost 100% of the fluid out of the reservoir, fill it up again, and bleed yet again. My back is killing me!
Did all 4 brakes again and so far that seemed to have fixed the problem. Driven for about a half hour with no locking up on me. I can even move the car with my foot outside the driver's door.
Thanks!
