Brake resurface?

[1stToyota]

Originally Posted by Loren

Rust on the brake rotors from the car sitting on the lot. Simple as that. The area where the pad was didn't rust, so you have a difference in surface textures that you can feel.

Just do what I said, it will fix the problem.

Just suppose that there was rust, using them once, or 100 times since the initial 10 miles should have cleaned off the rust buildup. Yes, just get the brakes real "HOT"...you'll have rotor and pads problems for sure.

Guess it'd be only natural to over-think this, but since it's under warranty it'd be real easy to have the dealership check the rotors for runout, or stubborn rust stains, then they could tell the customer to get out there and get those brakes "HOT"...

[Loren]

Originally Posted by 1stToyota

Just suppose that there was rust, using them once, or 100 times since the initial 10 miles should have cleaned off the rust buildup. Yes, just get the brakes real "HOT"...you'll have rotor and pads problems for sure.

Didn't read that article, did you? That's okay, it was only written by an automotive brake system engineer. Nobody you should trust, or anything.

If you understand how brakes actually work, then you'll understand why getting them hot is an important part of breaking them in. You'll also understand that anytime you allow rust to take over the surface of the brake rotor, you need to redo the break-in procedure.

[1stToyota]

Originally Posted by Loren

Didn't read that article, did you? That's okay, it was only written by an automotive brake system engineer. Nobody you should trust, or anything.

If you understand how brakes actually work, then you'll understand why getting them hot is an important part of breaking them in. You'll also understand that anytime you allow rust to take over the surface of the brake rotor, you need to redo the break-in procedure.

No, you just assume that it's rust causing the vibration, and somehow it damaged the rotors within the first 10 miles of their life. And you don't have to "break-in" rotors to clean rust off, you might have to bed-in brakes to get the best performance and to season the rotors to make them less prone to warpage, but getting the brakes "HOT" isn't required to clean off the rust. If you knew anything about brakes you'd know that rust can "take over" brake drums in cool climate, or under high humidity conditions, on a regular basis...and the owner doesn't HAVE to go through that bed-in process and get them real "HOT" every single time, they just have to use their brakes to clean the rust. Rust more than likely will cause noise, not vibrations in the steering wheel, as the OP stated as a symptom...hint: rust usually = noises n squeeks. Runout and steering/suspension problems = vibrations under braking conditions

And no, I didn't need to look at the link and diagnose/assume a stubborn rust spot as the source of the vibration, I've probably done 1,000-1,300 brake jobs in the past few ASE certified years...you?

[Goose]

Not trying to draw the debate to a close, but according to my dealer, my brakes were indeed slightly warped. Dealer notes described a "slight pulsation when slowing" following a test drive. A light resurfacing and the brakes are nice and smooth now. Left the car for a few hours, no charge (warranty). No big deal.

Hope this adds something to the info pile...

[1stToyota]

Originally Posted by Goose

Not trying to draw the debate to a close, but according to my dealer, my brakes were indeed slightly warped. Dealer notes described a "slight pulsation when slowing" following a test drive. A light resurfacing and the brakes are nice and smooth now. Left the car for a few hours, no charge (warranty). No big deal.

Hope this adds something to the info pile...

As I thought. Thanks for the update.