sanding my rotors?

[jhandy]

I would like everyone's thought about sanding my rotors.

I have OEM pads on the car, and the brake light turned on today. It looks like the drivers side front is the culprit.
I wanted to replace the pads with pagid orange and I remember reading somewhere that if you change pad compounds you should turn or sand the rotors.

I cant turn them, they are drilled. Also I DO NOT want to sand them. I would love it if I could drop in the new pads and get to driving in 30 mins without taking everything off.

So what is the consensus? Sand or change and go?

Thanks,
James

[san rensho]

If the rotors are glazed, hit it with 60 grit on a rotary sander. Ive done this on rotors and flywheels to clean them up. If they are not glazed, just put new pads on, they will wear into any imperfections on the rotors.

[Steve Tinker]

I've changed pads on a dozen different cars and never "sanded" them!!

If the rotors are within spec for thickness and are not heavily grooved, glazed or rusted (especially at the back of the rotor) I would just blow out the cross drill holes - they tend to hold brake dust - and fit the new pads and wires.

I found when I fitted new pads (Texstar) to my Boxster S last year, it pays to follow the break in procedure as per manufacturers instructions. This makes a big difference to overall braking efficiency and lifespan for the new pads.

[Jager]

I replace the rotors when I replace the pads... It's a Porsche!!


Jager

[jhandy]

The rotors have been replaced. They are new. They do not need to be replaced, Porsche or not.

The questions is not to remove imperfections, rather do I bother removing the thin invisible film that all pads place on the rotors.

the theory is that the film from the OEM pads will bleed into the new compound and do something bad.

[Jager]

????????????????????????

You have new rotors and the brake warning light came on? Are you saying the rotors were replaced but not the brake pads?

[WhipE350]

Heck, too much science going on here...my rear rotors are 11 years old, threw on new pads did the normal high speed break in and they work great!
On the front I needed new rotors and pads, I put on Mintex pads drove for a 1000 miles, hated the dust and put on Akebono, did the break in again and they work fantastic and no dust at all.
Think I have heard this concern before and maybe I don't know much, but I think you would be fine to put new pads on, heat'em up good and you'll be real happy.
Good luck!