Quote:
|
Originally Posted by jessb45
It makes logical sense, I have just never heard of rotors bending or doing anything that could cause that. Is that what happenes to them (bending) what causes it? Also, my rotors are a smooth as glass right now.
|
There are two things that make rotors wear out faster these days then thet used to.
#1 To save weight in order to meet federal fuel mileage levels the car makers have been making rotors and such thinner. Being thinner not only makes the rotors wear out faster but by not having as much mass they dont handle the heat generated by the process of breaking as well and will warp. I have read where several foreign makers consider the rotors a throw away part. Meaning that they do not make them with enough thickness that they can be machined true if they do warp.
#2 People have been complaining about the squeel that happens sometimes when the brakes are applied using modern semi-matallic brake pads. To over come this problem the manufactors have been switching to a softer materal to make the rotors out of to eliminate that noise.This does a great job of making the breaks quieter but makes the rotors wear out much faster.
When I purchased my 97 Aurora it only had 55,000 miles on it but when I took the pads in to be turned I was told they were already to thin to be safely done. My wifes 98 Pontiac Montana's front rotors had to be changed out at 75,000 miles ,if I remember correctly, for the same reason.
BKVic