I have power slot rotors and some ceramic brake pads, The pads are not very worn and all surfaces clean as well as greased slides. But these things have started to squeak under braking. Any clue what it could be? I toke everything apart and cleaned everything today....still squeaking! help please if you can.

Did the ceramic pads come with grease (small white packet)? If so did you use it?
I've seen several setups that need the back side of the pad to be greased (with the grease provided, don't use any old grease) or they will squeek bad. A dab will do it, so don't go hog wild either; you basically want a thin film.

If they didn't come with grease, did the rotors come coated? Many (especially cheap performance) rotors come coated so they don't rust. Good quality performace rotors will have a nickle (or other metal) coating that will prevent them from rusting. You may need to hose the rotor down with brake cleaner to get that protective coating off, if it's the cheaper variety.

Good luck, let us know if you solved it, and what it was.

i had some brake quiet on the back of the pads and no work, and the rotors are powerstop (from what i know as a great product) they came painted silver then it wore of as the pad removed it but i have sprayed them with brake cleaner.

For me i had a similar problem, after a few weeks of riding on my new brake pads they were squeeking. So i decided to change to a different type of brake pad and the squeeking stopped, i went with one of the cheaper autozone brake pads. I dunno if that will solve your problem, but for me i think my brake pad was the problem.





ONE OF PHILLY'S FINEST

im thinking thats mine as well

Cermaic pads are made to be used on damped iron rotors. The Power Stop rotors are not this type. You can be fairly certain this is whats causing the squeal. I have had problems with Raybestos ceramics in the past, where the mixture was not right, this was identified by the date code on the box. For whatever the problem was, they were too hard, and they were making an excessive amount of brake dust.

So I will need the cast iron damped rotors with ceramic pads? I noticed PartsAmerica has "damped" rotors and I didn't know what they were used for. I just wnat a set of rotors that won't warp.

Brad

All rotors are made of cast iron. All rotors will "warp" because it has nothing to do with the material they're made of. They don't actually warp in the traditional sense of the word. They get deposits on them that causes fluxuations in the friction co-effecient of the material, causing the pads to grab more or less as the rotors goes round, causing that pulsing effect.

Bedding rotors will make them much harder to warp, but still not impossible.

I always thought that rotors did actually warp as a result of over-heating, and that the material they are made of is one of the factors that determines how easily they will warp.

No. They're all cast iron. And they're all flat, even when "warped". They can be different hardnesses of cast iron from annealing, but it's all the same stuff.

is it the fact that they are slotted? I was thinking about getting Brembo slotted rotors to go with my Autozone Cermaic pads, but after reading above...

I haven't heard it brake's personally, so I can't say for certain what he's experiencing.

Slotted rotors make sound while breaking at higher speeds (45+ mph). I've heard it described at a chatter or a whine. It's the nature of the beast, they all do it to some degree. It sounds distinctly different than when you pads are worn and squeaking (I think so at least). And it's usually quiet to the point where most people don't care.

The amount of head needed to actually "WARP" a rotor is less than it would take to boil your brakefluid, so if you get to that point your screwed anyway. Like CTS said it's an uneven wear problem.

The stock rotors on a J-body wear unevenly to a fault. The powerslots should not have this problem. The purpose of the slots os tp disipate the gasses and thus the heat they generate away from the brake system

Also there is nothing wrong with a performance brake setup squeaking, as said previously it's the nature of the beast.

I have hawk HP pads and Powerslot rotors and my setup is quiet.


-Chris