More brake issues
Thread Starter
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Freshman User
Joined: Feb 2011
Posts: 26
Likes: 0
From: Jacksonville, AR
More brake issues
Alright, my left front brake has been dragging. I took off the wheel, and tried to release the caliper by opening the bleed port, this didn't release it, so i figured the caliper was bad. Just replaced the caliper, still the same problem. It also seems odd because the dragging seems to pulsate, similar to the feeling of a warped rotor. i dont think the rotor is warped since it is brand new, but i guess thats a possibility? ANY advice/help would be greatly appreciated.
Lead Driver
Joined: Sep 2002
Posts: 9,182
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From: Gateway to the West
The caliper won't fully open on its own. Loosening the cap on the master cylinder and carefully prying the caliper open far enough to free it from the rotor will let you remove it and use a C-clamp to fully seat the piston. Go slow and check the M/C for overflow periodically.
Did you bleed the entire system after you replaced the caliper or just that caliper? Did you replace brake pads as well or just put the old ones back on? If the old ones went back on, the problem may be the rotor or the wear on the pads. It takes very little to warp a rotor especially if a caliper was dragging a bit before you replaced it.
Did you bleed the entire system after you replaced the caliper or just that caliper? Did you replace brake pads as well or just put the old ones back on? If the old ones went back on, the problem may be the rotor or the wear on the pads. It takes very little to warp a rotor especially if a caliper was dragging a bit before you replaced it.
Thread Starter
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Freshman User
Joined: Feb 2011
Posts: 26
Likes: 0
From: Jacksonville, AR
The m/c does overflow, and I only bled the one caliper. Another weird thing- it seems to not drag in reverse. When I drive forward after reversing though, there's a *pop* then it starts dragging. but maybe it just feels like it isn't dragging in reverse because of the low gearing?
Last edited by USAFCrewChief; Feb 24, 2011 at 03:12 PM. Reason: added info
Thread Starter
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Freshman User
Joined: Feb 2011
Posts: 26
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From: Jacksonville, AR
soooooo should i try replacing brake lines next? is there any possibilty of a bad m/c or bad m/c cap seal? I have no exp. so idk if theres anyway to figure this out short of throwing parts at it
Elder User
Joined: Aug 2010
Posts: 567
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From: Vancouver, WA
I think you have a friction problem with the area the caliper is riding on. The caliper rides on grooves and a track to allow them to float. The actual caliper piston is controled by the fluid in the system, but there is always a little light drag on the rotors. The caliper assembly needs to be free of rust and burs. Disassemble and wire brush then lightly polish all grooves and tracks. Do the same for any bolts that pass through the caliper. Lightly lube then reassemble.
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Thread Starter
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Freshman User
Joined: Feb 2011
Posts: 26
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From: Jacksonville, AR
I think you have a friction problem with the area the caliper is riding on. The caliper rides on grooves and a track to allow them to float. The actual caliper piston is controled by the fluid in the system, but there is always a little light drag on the rotors. The caliper assembly needs to be free of rust and burs. Disassemble and wire brush then lightly polish all grooves and tracks. Do the same for any bolts that pass through the caliper. Lightly lube then reassemble.
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Thread Starter
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Freshman User
Joined: Feb 2011
Posts: 26
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From: Jacksonville, AR
I replaced the master cylinder and booster with a pre assembled/pre adjusted pushrod unit and it solved the problem. Not sure what the problem was specifically haha but i'm glad its solved. Unfortunately now the beast decided to run like crap, so thats great. It has a holley 4160 swapped onto it so im going to rebuild it and see if that is the issue, since the cap/rotor, module and plugs all appear to be recently replaced. Thanks for the help guys.
Senior User
Joined: Jul 2009
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if you see your rotor through your rim after driving it for 20 minutes and its orange hot then its a hung up caliper or jammed brake pad.
if it looks plain and normal, re adjust your rear shoes on your rear differential.
if it looks plain and normal, re adjust your rear shoes on your rear differential.