2007-03-03 06:18:13 · 5 answers · asked by k t 2 in Cars & Transportation ➔ Maintenance & Repairs
Because you ride the brakes when you drive.
2007-03-03 13:03:21 · answer #1 · answered by Nomadd 7 · 0⤊ 0⤋
Excessive hard use will build up a lot of heat and possibly cause them to warp. If you are unnecessarily tapping or riding the brake pedal, this will build heat up the rotors and cause them to warp. If you race up to a stop light or stop sign and apply the brakes hard at the last minute, that will also overheat the brakes. Taking your foot off the gas and coasting to slow down well ahead of time will definitely save the brakes. Also, if the rotors have been turned on a brake lathe as part of a brake job, they will be thinner and will build up heat faster and warp easier than with full thickness new rotors. There is also a difference in rotor quality.....there are 2 or 3 different quality grades of rotors. Cheap rotors are made from cheaper cast iron and will warp easier than better quality, more expensive ones. The quality of the brake pads (there are several) will also make a difference. Carbon graphite or Ceramic pads are the best, but they are expensive. When a brake job is done... the first 20 miles or so are crucial to seating the brake pads. You should use the brakes gently and avoid hard or fast stops until the pads are seated and "wear in" properly.
2007-03-03 06:38:28 · answer #2 · answered by dathinman8 5 · 0⤊ 1⤋
Believe it or not, there are quality differences in rotors. Some are able to dissipate heat better than others. Just because it's a seemingly indifferent disc of metal doesn't mean that they all have the same characteristics.
If you're buying those discount rotors all the time, they're probably not going to work as well as the ones that cost a little more. As the saying goes, you get what you pay for.
2007-03-03 06:32:20 · answer #3 · answered by Anonymous · 1⤊ 0⤋
My fronts are warping at 20K miles, my Altima lasted 60K miles driving on the same roads the same way. Some mechanics say the Honda rotors are prone to warp on various models. They recommend replacing the OEM with Brembo.
More research says if the lug nuts are over tightened, that will cause warpage. Some mechanics use the air wrench to tighten the nuts, very bad idea. Only use a torque wrench. Tomorrow I'm going to a different garage to check the torque.
2007-03-05 14:06:08 · answer #4 · answered by Anonymous · 0⤊ 0⤋
Rotor on allot of cars warp over time, its because of excessive heat. If your hard on your brakes then that's why. Brakes are meant to be applied slowly and firmly so if you hot rod, that is slam on your brakes the last 30 ft before a stop sign heat builds up very quickly causing them to warp.
2007-03-03 06:28:29 · answer #5 · answered by unclejohn 3 · 1⤊ 0⤋