Believe what you wish. If you think using an overheated, overtorqed, warped
rotor that has likely been pushed over its' limit more than once, and then
you take that rotor and make the surface even thinner than it was, how can
that possibly be any better than buying new? Nevermind the fact that the
metal properties of the rotor have already been effected from excessive
heat. And knowing that it probably cost you 2/3rds of buying new in the
first place. Personally, I don't believe in doing things half-assed, nor
do I have the extra time or desire to have to re-do the same job 6 months
down the road. As far as buying new rotors and them already being warped, I
don't buy no-name parts in the $20 or less bin. You can buy a medium to
high quality rotor and still pay under $75 each, in most cases. More than
likely it was made right here in NA and not overseas.
Listen, if I had a machine in my shop at my disposal, of course I would
resurface the old rotors, so long as they met the requirements to do so.
But in the middle of a brake job, with the front-end of my car in pieces, I
am not going to try and find a way to the closest shop with a lathe and then
turn around and pay anywhere from $20 to $50 per rotor to have them
machined. For one, not everyone has a second car in the driveway to be able
to do that. Secondly, you have no idea how that rotor is going to turn out.
Even an expert machinist may not be able to cut it perfectly. And if he
doesn't, that's the same as taking a lighter to the money you just spent on
that used rotor. No, I'd rather just pick up a pair of rotors while I'm
already at the parts store to get pads and whatever else I need. That way,
I have two new rotors sitting beside me when the brakes are ready to go back
I'm talking about cost in the long run and life of the used rotor. It makes
much more sense to buy two new rotors as opposed to machining used/warped
rotors that will probably last under a year. The last time I had
rotors/drums machined, it cost me about $30-$40 per rotor/drum. For most
domestic vehicles I have owned in the last 10 years, add ~$25 or less per
unit and you have new, with warranty. What happens when that used rotor
fails a second time around, and you have no option of machining it? Don't
tell me you search all the junk yards for a used pair to resurface?