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Typically pads need to be changed more than once before rotors needs to be *replaced*. Most shops machine rotors when changing pads to give them a smooth, even surface. Machining removes groves that cut into them as a result of normal wear (or if pads are not replaced promptly). Machining can straighten warped rotors due to excessive heat / quick cooling. These are definitely NOT considered "worn out".
Worn out rotors must be *replaced* if they are too badly damaged, rusted, etc. or if they have been machine so many times that they are too thin to safely brake the car. There are specific guidelines that spell out exactly how thin rotors can be before they must be replaced. Mechanics measure the thickness of the rotor with a micrometer which reveal thicknesses to the 1/1000 of an inch.
Have you ever had the rotors turned (reconditioned)? If you have you need to replace them. Once they have been turned there is not enough metal in them to dissipate the heat generated from the brakes. If that is not the case you may want to upgrade your disc brakes and your drum brakes to a higher quality pad. I use RockAuto.com pretty often as they show you quite a range of replacement/performance parts from the low end of the price spectrum all the way up to high performance parts. If the brakes are keeping pressure on the drum or are keeping in contact with the drum, you need to have the brake shoes properly adjusted. This is part of normal maintenance. If the disc brakes are keeping in constant contact on one side or the other, be sure the disc brake slides are properly lubricated and not sticking. RockAuto Parts Catalog
if you have brake shoes in back and pads up front shoes can be adjusted in back wrong way now if you have all pads on that car unless you do a very lot of driveing did your mechanic really change your brakes theres a place called just brakes they offer a life time warranty and they stand by it
Normally a "pulsing" brake pedal means that that you have a warped brake rotor or the brake caliper is lose. I would start by taking the front wheel off and inspecting the brake pads and the rotor. If the brake pads are worn down bad replace them. Pay special attention to the brake rotors also as if the are grooved very bad, they should also be replaced.
front brakes? they have built in squealers to let you know when to replace the pads.back brakes, the same.pulling to one side or other whan you apply the brakes? check for faulty or warped brake rotor.had them replaced lately? take it back to your mechanic!! grinding metal to metal sound? go to mechanic post haste!!your almost eating the rotor up, more expensive to repair.hope this helps you and godd luck thank you for choosing fixya.com
Warped disc, or loose brake caliper bolts, or brake pads without retaining springs or simply the pads have worn right down and you are receiving the bump warning on the disc. Remove the front wheel(s) and inspect pads and then check brake caliper retaining bolts. Turn the wheel so that you have an unhindered view of the rear of the brake caliper assembly. Rotate the hub and as you do so watch what happens to the disc rotor between the pads. If the disc rotor is seen to deviate from what should be a straight spin then it is warped and will need to be changed. Check the other wheel to be sure and to act as a reference to normal function...it is rare for both disc rotors to warp at the same time. If one disc rotor is at fault the general rule is to replace the other at the same time.
Check for clearance between the rotor and the caliper,and caliper to the rim.Make sure one ,or more of the brake pads where not accidently put on backwards,with the metal on the rotor,it happens sometimes.