Brake Problem I've Never Read About Here
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Gone, but not forgotten
Joined: Oct 2005
Posts: 5,026
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From: Charlotte-Fairbanks-Bflo
Brake Problem I've Never Read About Here
My son-in-law has an '02 long bed extended cab 4x4 auto, that the brakes are seizing up on. Every time you apply the brakes The pedal will get a little more pumped up until after about an hour of driving all 4 wheels are completely locked up. You can either crack the brake lines loose and release the built up pressure, or let it sit for about 5 hours and they will release themselves. Does not sound like much fun to me. His life is already miserable enough, he is stuck living in Buffalo, but takes good care of my youngest......LOL
Infidel
Joined: Aug 2003
Posts: 1,115
Likes: 2
From: Elkhorn WI
Maybe the master cylider???
Thats the only thing I can think of that would cause the pressure to stay in the lines.
Has he done anything with the brakes recently? or did it just start happending all of a sudden?
I've read about when you collapse the pistons back inside the caliper you can damage some sorta valve in the master that would let the pressure release.
Does the brake fluid look dirty?
Also...are you saying the pedal is HARD to push down about after an hour of driving? Might even be a hyrdoboost issue.
Aff....slow typer
Thats the only thing I can think of that would cause the pressure to stay in the lines.
Has he done anything with the brakes recently? or did it just start happending all of a sudden?
I've read about when you collapse the pistons back inside the caliper you can damage some sorta valve in the master that would let the pressure release.
Does the brake fluid look dirty?
Also...are you saying the pedal is HARD to push down about after an hour of driving? Might even be a hyrdoboost issue.
Aff....slow typer
Thread Starter
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Gone, but not forgotten
Joined: Oct 2005
Posts: 5,026
Likes: 2
From: Charlotte-Fairbanks-Bflo
Maybe the master cylider???
Thats the only thing I can think of that would cause the pressure to stay in the lines.
Has he done anything with the brakes recently? or did it just start happending all of a sudden?
I've read about when you collapse the pistons back inside the caliper you can damage some sorta valve in the master that would let the pressure release.
Does the brake fluid look dirty?
Also...are you saying the pedal is HARD to push down about after an hour of driving? Might even be a hyrdoboost issue.
Aff....slow typer
Thats the only thing I can think of that would cause the pressure to stay in the lines.
Has he done anything with the brakes recently? or did it just start happending all of a sudden?
I've read about when you collapse the pistons back inside the caliper you can damage some sorta valve in the master that would let the pressure release.
Does the brake fluid look dirty?
Also...are you saying the pedal is HARD to push down about after an hour of driving? Might even be a hyrdoboost issue.
Aff....slow typer
No to the sitting and it's been doing it quite awhile. Thank you everyone and you can bet your bippies I will post the results.
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Gone, but not forgotten
Joined: Oct 2005
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From: Charlotte-Fairbanks-Bflo
I called him with your advice and he's going to start with the ABS stuff, but not until Monday. He promised to call me with what they find. Thanx again everyone.
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Cargo Master
Joined: Mar 2008
Posts: 2,975
Likes: 19
From: Archdale,N.C.
Maybe the master cylider???
Thats the only thing I can think of that would cause the pressure to stay in the lines.
Has he done anything with the brakes recently? or did it just start happending all of a sudden?
I've read about when you collapse the pistons back inside the caliper you can damage some sorta valve in the master that would let the pressure release.
Does the brake fluid look dirty?
Also...are you saying the pedal is HARD to push down about after an hour of driving? Might even be a hyrdoboost issue.
Aff....slow typer
Thats the only thing I can think of that would cause the pressure to stay in the lines.
Has he done anything with the brakes recently? or did it just start happending all of a sudden?
I've read about when you collapse the pistons back inside the caliper you can damage some sorta valve in the master that would let the pressure release.
Does the brake fluid look dirty?
Also...are you saying the pedal is HARD to push down about after an hour of driving? Might even be a hyrdoboost issue.
Aff....slow typer
OK...so what does it mean if the fluid is dirty...sorry, I had to ask?
Infidel
Joined: Aug 2003
Posts: 1,115
Likes: 2
From: Elkhorn WI
Dont be sorry for asking question!
If the fluid is dirty, usually from old brake lines it will reck havoc on the whole inside of the brake system...maybe his whole issue is the ABS proportioning valve is stuck due to alot of gunk from a bad hose....or maybe not.
When i had my P/S pump going out on me, my brakes were a lil weird so i changed the fluid it helped somewhat but not much. Since i got a new pump on there my brakes work alot better then I remember
If the fluid is dirty, usually from old brake lines it will reck havoc on the whole inside of the brake system...maybe his whole issue is the ABS proportioning valve is stuck due to alot of gunk from a bad hose....or maybe not.
When i had my P/S pump going out on me, my brakes were a lil weird so i changed the fluid it helped somewhat but not much. Since i got a new pump on there my brakes work alot better then I remember
Thread Starter
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Gone, but not forgotten
Joined: Oct 2005
Posts: 5,026
Likes: 2
From: Charlotte-Fairbanks-Bflo
Huh? Tranny fluid in the master cylinder and calipers. If so, a few years ago when I replaced my rear calipers I made a big mistake, but my brakes work great.
Fleet Mechanic
Joined: Feb 2005
Posts: 1,797
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From: Northern Colorado
DOT brake fluid is hygroscopic, meaning it sucks any and all moisture it can out of any air it can get to (reservoir mostly). Many mechanics, including Kwik, recommend flushing your brake fluid annually.
The brake lines require DOT3 brake fluid. Power assist (hydro boost) requires tranny fluid.
The brake lines require DOT3 brake fluid. Power assist (hydro boost) requires tranny fluid.