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Screeching sound at front wheels/change of pads.

 
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Old 09-25-2011, 08:11 PM
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Screeching sound at front wheels/change of pads.

My front two tires have begun to have frequent screeches, and it's very loud. I brake a few times and it sounds very similar to the annoying sound. I'm going to guess the brake pads are going out? I haven't changed them since I first purchased the car and the last owner didn't take care of it very well. When replacing brake pads, will I have to do anything else? Like bleeding the braking system?
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Old 09-25-2011, 08:42 PM
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Re: Screeching sound at front wheels/change of pads.

no you shouldnt have to bleed it...but a lot of things cause for the annoying screeching sound... if its not the pads then its a good chance it could be something in ur caliper
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Old 09-25-2011, 09:23 PM
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Re: Screeching sound at front wheels/change of pads.

If the screeching is when you apply the brakes, it's likely the wear indicators -- small metal tabs that rub on the rotor before you completely wear through the pad. You should be able to tell how thin the pads are visually -- the outer pad is clearly visible just by taking the wheel off. If they're down the wear indicators, change the pads now!

You can get away with swapping pads without bleeding the brakes, but bleeding them is so easy that it's worth doing it. In fact, if the fluid is dark, it's worth just flushing new brake fluid through the system -- just keep bleeding each caliper (and replenishing the MC reservior) until the fluid runs clean.
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Old 09-25-2011, 09:37 PM
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Re: Screeching sound at front wheels/change of pads.

Well this doesn't happen every time I brake. It's most loud and noticeable when driving. I'd have to brake to soften the sound but won't help much. I think I'm just going to go ahead and change them, because I have no clue how long they've been on the car. And going about bleeding... how does one do that?
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Old 09-25-2011, 09:38 PM
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Re: Screeching sound at front wheels/change of pads.

For the mean time, I will drive my Accord so I will not risk any more damage/sound.
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Old 09-26-2011, 05:15 AM
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Re: Screeching sound at front wheels/change of pads.

does it happen even at idle speeds? you can always try jacking up the front of the car and have it idle. if you don't want to do that, you can manually spin your wheels by hand and listen for the sound and look around for what is causing it. could be a rock/road debris stuck between the rotor and the shield, that shield could be bent. could be some brake pad residue or something stuck between the pads and rotor.
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Old 09-26-2011, 06:05 AM
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Re: Screeching sound at front wheels/change of pads.

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Originally Posted by Beaker View Post
does it happen even at idle speeds? you can always try jacking up the front of the car and have it idle. if you don't want to do that, you can manually spin your wheels by hand and listen for the sound and look around for what is causing it. could be a rock/road debris stuck between the rotor and the shield, that shield could be bent. could be some brake pad residue or something stuck between the pads and rotor.
Idle speeds as in driving normally? It does. I checked the shields and between the rotors and found nothing. I cleaned any debris and tried driving around again and it still had that nasty screech.
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Old 10-02-2011, 10:35 AM
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Re: Screeching sound at front wheels/change of pads.

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Originally Posted by Cthulhuy View Post
Well this doesn't happen every time I brake. It's most loud and noticeable when driving. I'd have to brake to soften the sound but won't help much. I think I'm just going to go ahead and change them, because I have no clue how long they've been on the car. And going about bleeding... how does one do that?
Hmm...you said you cleaned everything, but take a close look between the caliper and the dust shield -- I've had small stones get caught in there, and make a terrible sound without doing much damage. As far as bleeding the brakes, if you don't have the shop manual try this: How to Bleed Brakes - Tips on Bleeding Brakes - Popular Mechanics -- it's a pretty universal process on any disk brake assembly. As I said earlier, flushing is just a matter of continuing until you see clean fluid coming out.
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Old 10-02-2011, 02:53 PM
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Re: Screeching sound at front wheels/change of pads.

Just jack the car up - toss it on some jack stands and pull the wheels off. Inspect the INNER AND OUTER pads. Just because your outer pad looks good means nothing.


There is no guessing in a situation like this, you need to inspect it first hand. it "sounds" like pads, but you wont know until you take that caliper off and look at both pads.

To install new pads on the front of the car you will need a piston spreader (at least thats what i call it, not positive if thats the normal term) to compress the piston back into the caliper for the new pads. Be sure to remove the brake cylinder resi cap so you don't build up pressure and blow a line. You could do the redneck way and use channel locks, but i suggest against it. Bleeding the lines is ideal when doing pads - but not necessary.

Inspect the rotors/wheel bearings / ball joints and everything else while you're down there - you may be able to catch something else that's on it's way out and have a chance to order parts before whatever else may break next.
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Old 10-03-2011, 07:53 PM
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Re: Screeching sound at front wheels/change of pads.

I forgot to update this, but it did turn out to be my brake pads, they were due for replacing as they almost had no more padding. I also inspected the rotors and wheel bearings, everything checked out fine.
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