YACT: what causes brakes to grab?

[NeoPTLD]

My brakes have issues with grabbing for the first few miles after I let it sit for a few days. I bring the car to a gentle stop at low speed and the brake just grabs hard when I'm almost completely stopped.

One of my front tires skidded today right before I came to a complete stop because it grabbed suddenly. Grabbing always goes away after driving it for a bit. What is happening at the rotor/pads when it grabs like this?

 

[Confused]

What car is it? It might help if you tell people in case they know of a problem with your particular car :roll:

 

[TechnoKid]

do you have 4 wheel discs or drums in the rear?

i was going to say slight rust from brake dust and moisture on the rotors sometimes takes a stop or two two come off. this happens when the car is parked otuside and it rains and it isn't driven for a while.

does the pedal feel normal when this happens?

 

[Pepsi90919]

moisture causes rust.

end of thread.

 

[raptor13]

Originally posted by: Pepsi90919
oxidation causes rust.

end of thread.

Fixed.

 

[0roo0roo]

rust over and over?

 

[olds]

Originally posted by: raptor13

Originally posted by: Pepsi90919
oxidation causes rust.

end of thread.

Fixed.

End yourself. Please.

 

[hans007]

i think it depends on how the calipers are turned. at least thast what i've read.

 

[NikPreviousAcct]

Originally posted by: Confused
What car is it? It might help if you tell people in case they know of a problem with your particular car :roll:

Right because brakes are different for each year, make, and model for each car out there. :roll:

 

[Insane3D]

Originally posted by: Nik

Originally posted by: Confused
What car is it? It might help if you tell people in case they know of a problem with your particular car :roll:

Right because brakes are different for each year, make, and model for each car out there. :roll:

Read the last part of the sentence slower Nik...

in case they know of a problem with your particular car

As in...model specific brake problem.

 

[Pepsi90919]

Originally posted by: raptor13

Originally posted by: Pepsi90919
oxidation causes rust.

end of thread.

Fixed.

oxidation is rust

 

[NeoPTLD]

Originally posted by: Insane3D

Originally posted by: Nik

Originally posted by: Confused
What car is it? It might help if you tell people in case they know of a problem with your particular car :roll:

Right because brakes are different for each year, make, and model for each car out there. :roll:

Read the last part of the sentence slower Nik...

in case they know of a problem with your particular car

As in...model specific brake problem.

Read my question carefully.
What is happening at the rotor/pads when it grabs?. No where did I ask whether or not this particluar model has this and that problem. I'm interseted in the phenomena at the component level.

 

[NikPreviousAcct]

Originally posted by: NeoPTLD

Originally posted by: Insane3D

Originally posted by: Nik

Originally posted by: Confused
What car is it? It might help if you tell people in case they know of a problem with your particular car :roll:

Right because brakes are different for each year, make, and model for each car out there. :roll:

Read the last part of the sentence slower Nik...

in case they know of a problem with your particular car

As in...model specific brake problem.

Read my question carefully.
What is happening at the rotor/pads when it grabs?. No where did I ask whether or not this particluar model has this and that problem. I'm interseted in the phenomena at the component level.

See, I knew this... because I didn't have a reading comprehension problem.

 

[Stumps]

your problem will be related to the moisture in your brake fluid, what happens is your flexible brake lines allow the brake fluid to absorb water, now under normal operating circumstances this is ok and will not really affect your braking performance.
but if you have let you car sit for a while what happens is the water seperates from the fluid and is like water in oil, as soon as you apply the brake it heats up the fluid and the water which will cause the water boil, this displaces the brake fluid momentarely as the car slows and then as it is reabsorbed by the brake fluid the comes rushing back and force the caliper to close with more force than the intial application and it lock the wheel.
Sounds like you may need a fluid change!

 

[Insane3D]

Originally posted by: NeoPTLD

Read my question carefully.
What is happening at the rotor/pads when it grabs?. No where did I ask whether or not this particluar model has this and that problem. I'm interseted in the phenomena at the component level.

Actually, the way you worded it, you sounded like you were having brake problems and wanted help figuring it out, not the specifics of why it does that.

"My brakes have issues" sounds like a problem.

Sorry I misunderstood you...I was speaking more toward Nik's post than your OP.

 

[Insane3D]

After thinking about that post for a bit, I realized I was probably just being pissy myself because I'm tired and I worked all last night.

You can see my original post in Eli's quote.

Sorry Nik...you bug me sometimes, but you really didn't do anything to warrant that now that I look back on it.

Eli's right....it's stupid to get upset over this sorta stuff.

 

[Stumps]

wtf???

 

[quakefiend420]

Originally posted by: Insane3D

Originally posted by: Nik

See, I knew this... because I didn't have a reading comprehension problem.

:roll:

I wasn't even responding to the OP fvcktard, I was merely addressing your usual a$$hole-ness towards another poster who was simply asking a valid question trying to help.

Why don't you pull those tampons out of your a$$ sunshine....you know bitchy you get when that happens.

Just curious, do you strive to be a whiny b!tch, or does it come naturally?

bwahahaha...i love this place...

 

[Stumps]

hmmm not much has changed since i was banned from the forums over 2yrs ago!

 

[Insane3D]

Originally posted by: Stumps
hmmm not much has changed since i was banned from the forums over 2yrs ago!

Welcome back!

 

[Stumps]

one question, does neffing still exist?

 

[quakefiend420]

Originally posted by: Stumps
one question, does neffing still exist?

lol...like that would die

 

[Insane3D]

Originally posted by: Stumps
one question, does neffing still exist?

No, neffing was eliminated in early 2002.

Edit:

Sorry OP, I'll let this thread get back on topic.

 

[Stumps]

hmmm, about the time I got banned, hmmm maybe I had something to do with it.
Any way as far as the brake issue goes, thats his problem...water in the brake fluid.

 

[Eli]

Originally posted by: Insane3D

Originally posted by: Nik

See, I knew this... because I didn't have a reading comprehension problem.

:roll:

I wasn't even responding to the OP fvcktard, I was merely addressing your usual a$$hole-ness towards another poster who was simply asking a valid question trying to help.

Why don't you pull those tampons out of your a$$ sunshine....you know how cranky you get when you've got those jammed up there.

Just curious, do you strive to be a whiny b!tch, or does it come naturally?

/blows smoke towards Nik and Insane3D

Chill, it's brakes.