2004 Jeep Grand Cherokee Logo
Posted on Feb 04, 2011
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Rotors keep warping - 2004 Jeep Grand Cherokee

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  • Posted on Feb 04, 2011
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Could be a number of problems. Here are a few.

Defective Brake Pads

  • Brake pads that are defective and/or incorrectly installed can, over time, cause brake rotors to warp and become damaged. Brake pads are responsible for squeezing against the spinning brake rotor, an action that causes a vehicle to slow down or stop. If the brake pads are bent, misshapen in any way, or aligned and/or installed abnormally, they can exert abnormal pressure on the brake rotors, a condition that can cause brake rotor warpage over time.

  • Abnormal Brake Caliper Action
  • An abnormal or malfunctioning brake caliper can result in brake rotor warpage if the degree of brake caliper dysfunction is severe enough. A brake caliper houses a set of vehicle brake pads and provides the squeezing force necessary to squeeze the brake pads against the spinning brake rotor. If a brake caliper applies too much pressure to the brake pads, or if it applies pressure inconsistently, it can cause a brake rotor to warp over time. Adequate brake caliper action is necessary for optimizing brake pad and brake rotor function.

  • Excessive Heat
  • A vehicle's braking system generates a tremendous amount of friction-related heat, heat that normally gets radiated away from the brake pads and brake rotor mechanisms. However, in cases where excessive heat is generated within a braking system and not dispersed adequately, serious brake malfunctions can occur, which can include brake rotor warpage. A stuck brake caliper, old, worn-down brake pads, or a defective brake rotor can cause excessive heat to develop in or around a brake rotor, which can cause brake rotor damage and warpage.

  • Damanged Wheel Hub Spindle
  • A brake rotor assembly is supported by and rides on a long, slender metal tube called a hub, or wheel hub assembly. The hub is what allows for the smooth, even circular motion of the spinning brake rotor. Designed with a smooth, low-friction exterior, the wheel hub assembly is critical to the proper spinning motion of the brake rotor. Any abnormalities or defects with the wheel hub assembly, including hub warpage, cracking or misalignment, can cause abnormal brake rotor rotation, which in turn can cause brake rotor warpage over time. Normally, a damaged wheel hub assembly is noticed and remedied prior to extensive brake rotor damage, as a severely damaged wheel hub assembly will cause a vehicle tire to wobble and shake.
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    • Posted on Jan 14, 2015
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    1. make sure lug nuts are all torqued evenly to the proper spec- do not allow an air gun to tighten!
    2. economy (offshore) rotors will warp much quicker, always use reputable parts - you get what you pay for
    3. dragging brakes will cause overheating and warping - be sure to service your brakes regularly to ensure free movement and use new hardware - lube all moving surfaces including pins.
    4. check for vehicle specific bulletins such as changes to the dust shield (ie montana/uplander) causing excess road debris/salt to attack rotor and cause warping issues

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    Anonymous

    • 607 Answers
    • Posted on Mar 27, 2009

    SOURCE: 2002 Lincoln LS rotors keep warping

    Warpage can be caused by many reasons, such as getting real hot ( normal ), and you driving though a nice cold puddle. INSTANT warp. Also tightening wheel lug nuts too tight can warp rotors. Should be tighten with a torque wrench to factory spec.

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    Anonymous

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    • Posted on Sep 11, 2009

    SOURCE: Rotors keep warping. Parking brake=caliper sticking?

    well first of all just because they can be turned dosent always mean that you should do it, now a days rotors are alot cheaper to just replace them, however whatch where you buy them. in most cases you get what you paid for, Like cheap rotor prices=less life, same for the pads and how hard the driver uses the pedal. and as for the "classic rotor warp" thats not always the case with these newer cars having more movable joints than ever befor, it could be, bad hub bearing,bad lower ball joint...etc....good luck

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    Related Questions:

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    Car shimmies when appling brakes at over 40 mph

    your brake rotors are warped, if your vehicle is equipped with rear drum brakes have them cleaned and adjusted to keep your front brakes from working too hard and becoming warped, also replacing the front rotors is better than resurfacing them because after bieng resurfaced they are thinner and are more prone to becoming warped again
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    I have a 2000 f150 5 speed 4x4 and can not keep rotors true

    If your problem is in the front set you may have bad hubs. Once you bolt the rotor to the hub the rotor will follow the hub. If the hub has a bad bearing the hub will pitch the rotor and the rotor will hit the same high spot no matter how many rotors you install.

    This is hard to catch because it takes the weight of the vehicle to bear down on the hub bearing. You may notice uneven tire wear.

    There were some problems with water warping the rotors after your hot rotors were bathed in water before parking. And sticking calipers can overheat the rotors.

    Check your hubs and if they are okay you could try some vented rotors with holes drilled in them for cooling.
    1helpful
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    Rotors keep warping. Parking brake=caliper sticking?

    well first of all just because they can be turned dosent always mean that you should do it, now a days rotors are alot cheaper to just replace them, however whatch where you buy them. in most cases you get what you paid for, Like cheap rotor prices=less life, same for the pads and how hard the driver uses the pedal. and as for the "classic rotor warp" thats not always the case with these newer cars having more movable joints than ever befor, it could be, bad hub bearing,bad lower ball joint...etc....good luck
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    Warped jeep rotors

    Three items that can cause that are seized caliper slide pins, frozen (partially) caliper piston or an internally failing brake hose (rubber one from body to caliper) Problem with any of these will keep caliper partially applied and will overheat and warp the rotor. Also, I recommend torquing wheel lugs when assembling...use star pattern.
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    Shaking brakes

    Your rotors are warped. You also probably need to brake pads. Take your rotors off and inspect them for cuts and grooves. If the surface is not flat you'll need new ones. If not take them to a machine shop and have them turned. Turning your rotors will cut them down until the surface is perfectly flat and not warped. The shaking is cause when the rotors are warped and you press the brakes and the rotor applies more pressure where it's high and less where it's low, thus causes it to shake
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    2002 Lincoln LS rotors keep warping

    Warpage can be caused by many reasons, such as getting real hot ( normal ), and you driving though a nice cold puddle. INSTANT warp. Also tightening wheel lug nuts too tight can warp rotors. Should be tighten with a torque wrench to factory spec.
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    Steering wheel shakes when brakes are applied lightly

    Sounds like a warped break rotor. Needs breaks.
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    Rotor's warped

    Rotors are a part of the disc brake braking system, and they warp due to a number of things. And the amount they warp ranges from very little, to quite a bit, so much so that you can feel the warpage in the brake pedal when you stop.

    They can cost from $20.00 to $150.00 per rotor, depending on the vehicle. They can be turned at the auto repair shop for about $10.00 per rotor. There is 1 rotor per wheel. Turning them gives you a new rotor for all intents and purposes, but once turned, depending on how much was turned off, they cannot be turned again. So a badly warped rotor might can be turned, or might be too warped to be turned. A slightly warped rotor might can be turned again.
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    Anti lock brake system

    If the light is not on it may not be the ABS that is pulsating on slow braking but it may be that your have warped brake rotors, even if the rotors were replaced with the pads the new ones may be warped already, we always check new rotors on a brake lathe before installing them because we have seen this happen many times
    1helpful
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    I have a shimmy in mySteering wheel not all the time it comes on randomly.

    In absence of more information, this is usually an symptom of warped brake rotors. A rotor can build up enough heat in a hard stop to be bendable especially with the high hydrolic pressure a brake pad can bring to bear. Simply, If you keep the brake pedal depressed hard after a hard/long stop it can warp the rotor. (NOTE: at a hard stop, as soon as possible let the car creep forward a few inches at a time so the brake pad won't be on any one spot too long, plus keep light brake pressure --only enough to keep the car from rolling). The warped rotor causes the brake pad and caliper to float too far from the rotor and you won't feel the shimmy until you apply brakes. Under brake pedal pressure each time the wheel rotates under brake pressure the rotor and caliper will rapidly vibrate a few millimeters to each side giving the sensation of a shimmy in the sterring wheel. Most of the time this can be corrected by having the rotors resurfaced( aka Turned)

    Out of balance or out of round tires can also cause a shimmy but should occur at a given speed range. Warpped rotor shimmy occurs during deceleration.
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