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If I get my brakes to be quiet and your theory is responsible for that success, the MPP will be duly awarded. One should not hold one's breath.

Manfred wrote:One should not hold one's breath.

For my theory or your benevolence?

For either

I read elsewhere (horrors!) that cleaning the disc might help. I shall start with the quick and easy.

ME 109 wrote: Less than a full circle contact mark would suggest a worn contact surface on the caliper piston. This could allow for lateral vibration, much like a woodwind reed.
This could be remedied by machining said contact surface on the piston, or replacing the piston with a new one.

I disagree (about what this would suggest). A less than full circle contact ring on the back of the pad would suggest tapered wear on the disc, and it would need to be addressed at the disc, not at the piston. Discs do, in fact, wear with such a taper.

Major Softie wrote:
I disagree (about what this would suggest). A less than full circle contact ring on the back of the pad would suggest tapered wear on the disc, and it would need to be addressed at the disc, not at the piston. Discs do, in fact, wear with such a taper.

Ah yes, quite right Major. Still providing the situation of the unsupported pad.
Which would also create a pressure point on the piston exacerbating the situation over time.

Perhaps the tapered disc would exhibit first, but would eventually have to have some effect on the piston.
I think you're right and would check the disc first.

BTW, keep yet hands off that MPP. It's mine I tell ya, mine!

Well, preliminary test results are in.

I've done nothin' to my brakes - haven't cleaned the rotors, ground the pistons, not even looked at 'em. Been focused on other things.

And the most wonderful noise greeted me on my ride home from work Friday - tire noise! No squealing brakes - just the sound of tires on the concrete. Now, there is a very slight squeal once in a while, but it's noticeable and does not grab the attention of everyone within 25 feet as was the case when I first posted here.

Could it be that the new pads simply needed 500 miles of use to get settled in? That would appear to the case in this case. In which case, I keep the MPP

I can't help but notice that you have not specified exactly WHAT the perhaps overly exalted "prize" might be. ME 109 is not one to be trifled with. I tried trifling with him once and it didn't go well.

Native /5 wrote:I can't help but notice that you have not specified exactly WHAT the perhaps overly exalted "prize" might be. ME 109 is not one to be trifled with. I tried trifling with him once and it didn't go well.

As with all things of great value, the less that is known about it, the more valued it will be! ME 109 rested on his own "wisdom" and he knew full well the limits therein. Though he be a highly feared and somewhat respected fellow, I dare say I and the MPP are secure.

Manfred wrote:

Native /5 wrote:I can't help but notice that you have not specified exactly WHAT the perhaps overly exalted "prize" might be. ME 109 is not one to be trifled with. I tried trifling with him once and it didn't go well.

As with all things of great value, the less that is known about it, the more valued it will be! ME 109 rested on his own "wisdom" and he knew full well the limits therein. Though he be a highly feared and somewhat respected fellow, I dare say I and the MPP are secure.

And the Lord (of the Bings) said, "Oh we'll, themeth's the brakes"
And remember, what goeth around, cometh around.

ME 109 wrote:And the Lord (of the Bings) said, "Oh we'll, themeth's the brakes"
And remember, what goeth around, cometh around.

As my favorite theologian, Dirty Harry, said - "A man's gotta know his limitations."