Date: Tue, 19 Oct 2004 13:10:57 -0400 From: "Fred W." <Fred.Willsnospamove this to reply to' myrealbox.com> Subject: Re: 9-3 break rotors - are they routinely changed at 20K miles?
"John B." <alinogenospamail.com> wrote in message news:5102a154.0410181619.67f38a1nospaming.google.com... > BTW, not grooved from what I can see, certainly not pulsing. At $150 > in parts though, I don't even mind changing them myself, especially > since I might keep the car. Just as an additional data-point. I would *never* change a set of rotors pre-emptively, unless there was some visible or measurable problems with them. The minimum thickness spec is primarily to prevent someone from turning (shaving) the rotors down too far, which would make them highly likely to then warp. If the rotors are not warped (pulsing during braking) or cracked I would leave them alone. Check your pad thickness occasionally (periodicity is spelled out in the service schedules) as they *do* need to be changed before they are 100% worn or you will cut the life of the rotors down dramatically. YMMV, -Fred W