On Sun, 29 May 2005 07:55:13 -0400, mic canic > wrote:

> thats not what chrysler taught me the oring seals the caliper

Yes, the "O" ring seals the caliper, but it also "bends" a but as the
piston slides though - and when the pressure is released, the "O" ring
straightens back out, pulling the piston back in just a smidge. This
gives the clearance. Take a good look at the boot, flex it around -
then try to push the piston back with your fingers. Note how little
resistance the boot gives to being deformed - and how much force it
takes to move the piston. Absolutely no way the boot could handle
pulling the caliper back.

Your instructor at Chryaler only taught you half of the story.

I've taught it too - and I've tried to get the whole story told.
>
wrote:
>
>> On Sat, 28 May 2005 10:18:53 -0400, mic canic > wrote:
>>
>> >did you clean and lube the caliper slides and keep the anti rattle clips in
>> >place?
>> >the rubber boot of the caliper is suppose to pull the pad away from the rotor
>> >ever so slightly to help cut squeal
>> Actually it is the internal "O" ring that pulls the piston back, not
>> the outer boot on most calipers.
>> >
>> >Dan wrote:
>> >
>> >> I have a '99' Intrepid. I had the rotors turned last year and they rusted
>> >> and then"peeled" a layer off. Not sure I understand why, I have never had
>> >> this happen before. Anyway, I replaced rotors on the front and installed new
>> >> "anti-squeal" ceramic pads. Well, they squeal at low speeds and when making
>> >> a right turn, the squeal is louder from the left front. I wanted the ceramic
>> >> pads to cut down on the dark colored dust that accumulates on the wheels.
>> >> Anyone have this problem that was able to make the ceramic pads work without
>> >> squeal?
>> >>
>> >> Thanks, Dan