I've been having a lot of brake vibration ( not a wobble associated with a warped rotor) after replacing the front pads. It only happens when you slightly touch the brake pedal and feel the pad come into contact with the rotor. It got progressively worse and i purchased a new set of rotors + new pads for the front. I put them on and the noise was gone for a while and now its back, but not nearly as bad.

Still an audible vibration noise that seems to happen after they heat up. The only thing left to replace is the caliper but i wasn't experiencing this problem with my stock front pads and previous rotors...

Any ideas what could have spawned this? i've done full brake swaps and never experienced this.

Thanks in advance!

 

It looks like you didn't bed your rotors properly, resulting in a non-uniform deposit of pad material on the rotors. This will cause the symptoms you describe.

FYI, "Warped Rotors" is pretty much a myth. the brake chatter is typically caused by this nonuniform deposit.


http://www.stoptech.com/tech_info/wp_bedinstock.shtml

http://www.stoptech.com/tech_info/wp...rakedisk.shtml

 

Not sure what you mean here -- you feel a vibration under extremely light application only? I.e., if you're coming to a stoplight, the vibration starts just as you touch the pedal and then goes away as you increase to normal stopping pressure?

If that's the case, I'm not sure you have a problem... ?

 

I've had what you have and it was caused by a brake pad deposit on the rotor. Annoying but I lived with it until it went away.
Warped rotors are definatley no myth. I've refaced enough of them to say it is very common.

 

So you measured the thickness of the rotor between high spots and found the thickness to stay the same, but just wavy? Or you didn't put a micrometer to the rotor at all and started grinding and found each surface to be wavy, not flat?

Maybe you need to read the links I attached. I have a degree in Metallurgical Engineering and I've worked most of my life as an Automotive Materials Engineer. It's going to take more than a random post to convince me otherwise.

 

 

I've watched my rotors (not from S2000) getting re-surfaced on the brake lathe. Many times, the rotors showed warpage when failed to do a minimum shave. The "chunk... chunk... chunk..." sound plus the visible irregular cut pattern are evidence.

 

Those can be evidence of uneven pad deposits as well. Unless you've actually mic'd the thickness of the rotor in the high and low spots and found it to be the same, you haven't proved that the metal that composes the rotor itself has warped

 

OK OK. I guess I didn't read the linked articles careful enough.

 

good links! I'm book-marking these links to prove to my customers that their rotors are not defective. Their bed-in procedure, or lack thereof, is defective!