Kizashi Club

I get a real bad vibration while braking heavy twice and it gets worse if i brake heavy a third time. If it's not the rotors what else could it be? Still under warranty so would like a guess or two because my local dealer says there's nothing wrong.

Thanks

Chuck

Are you sure the vibration is not from the ABS?

Maybe it's best if you drive it with the service advisor as a passenger?

I wouldn't think that the ABS pulsating would get progressively worse.

Maybe bad bushings up front or a master cylinder?

Is it a vibration you feel in your seat or a pulsating in the pedal?

It's the rotors.

My brakes do the same thing. A couple hard stops or a quick run down a mountain road and my brake are pounding. It nothing to do with the abs, I know when that kicks in.

It feels like warped rotors except after the brakes cool off the braking is smooth as glass.
Warped rotors don't unwarp themselves. I think it might be pad transfer.
I only have 15,000 miles on my car and I was thinking that I could wait a little longer and put up with the stock pads but now I don't think so.

I plan on trying a set of EBC green stuff pads I've always had great luck with EBC pads.

It's pad transfer to the rotors.

But pad transfer doesn't normally disappear either?

I've found that pad transfer does go away and it seems to be different on all of my cars.
I think that when the pads and rotor cool the pad material is not a grabby and normal or light braking cleans the rotor.
That's just my theory but I can't think of what else is causing this.
A VW Golf I had would get this and it would take a week of normal driving till the brakes got smooth again.

My Subaru would never stop pulsing till I changed to EBC green stuff pads and in the 10,000 miles I have been using them I've had no brake pulsing.
Tons of black brake dust but no pulsing. That's a trade off I'll take.

Interesting article on "bedding" your brakes. Something that I was totally unaware of. This may surprise you...
http://www.zeckhausen.com/bedding_in_brakes.htm

Wow, what timing! I had the very same thing happen to me during a long downhill drive a few weeks ago. I wasn't riding the brakes at all, but it got so bad that I pulled over and looked for tire/suspension damage. Of course, at the bottom of the hill after they cooled off they were back to normal (smooth and strong). Glad to hear it isn't due to warped rotors.