New rotors, pads caliper on the rear. Put plenty of "Disc Brake Quiet" behind each pad. After about 1k miles, significant squeak on mild braking. Step on it hard, no squeak. This forum suggested that rotors and pads were too shiny. Sanded both side of both rotors with 220 grit sandpaper. Quiet for about 50 miles then squeak came back. Pulled calipers and sanded pads (as well as rotors lightly again). Squeaking returned almost immediately.

What's next?

This squeaking is driving me nuts. When it squeaks, if I bear down hard on the brake pedal it quits, but that's not an acceptable solution.

Thanks

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Had the same problem. The ONLY thing that worked was adding brake shims to the equation (along with LOTS of DB Quiet).

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Are you using that blue goop on the back of the brake pads?

The only thing that ever kept my 126 quiet permanently was to use brake grease on the back of the break pads. I used the synthetic grease from Napa.

grease hmm? never thought of that, I always use the red DBQ from advance auto. you may have hard pads that are polishing the rotors.
John

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If you bought pagid, try textar or vice versa. Pads are too hard. That's why they squeak.

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If your brake hoses are orig., you might want to replace that. I lived with a squeeling rear brake for so long. I used zimmerman rotors, pagid pads and new hoses. Noise is gone. The hoses werent obviously bad until I took it out. It was orig. as far as I know.

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The PBR organic deluxe pads are quiet, as are the OEM MB textars....like was mentioned earlier hard pads will squeak. We have a mixture of these two pad brands on our cars: '82: textar front, pbr organic deluxe rear '83: pbr organic deluxe on all 4, and none of them squeak, and I didn't use any anti-squeak paste at all!

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I did a complete (lines, pads, rotors, sensors, clips) brake job with OEM dealer supplied MB pads and it took a couple of months for them to stop sqeaking (did use the gunk on back of pads). But boy that thing would stop!

Best I could tell - it just took 3K miles or so of driving for them to stop squeaking on their own. Maybe just had to get through some of the initial material on the pad? Who knows.

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I tried slathering on even more goop on the back of the pads last night. Still squeaks this morning, but perhaps it improved a little. I guess next step is to try organic pads.

Thanks for the info.

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Try putting a slight bevel on the edges of the pads with a file and see if that helps.

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Brake squeak is caused by the brake pads moving against the caliper pistons (and sometimes the caliper mount).

The blue goop attempts to correct this by "glueing" the pad to the piston. In my experience, this works well for a short period of time, but eventually the bond breaks and the pad is free to move (and squeak). If you have to remove the brake pads, it is important to remove the old blue goop.

The brake grease allows the pad to move past the piston without slipping and sticking, which causes noise.

That is exactly what I was going to say. You weren't supposed to sand down the pad you were supposed to bevel the edges.

Also cleanliness is important. I always use almost a whole can of brake cleaner on each caliper.
I use Pagid pads with lots of anti-squeel/ brake paste and they never squeeked at all.

Danny

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The rears on the SDL would squeak real nice under light braking. These were a couple thousand mile old ATE rotors, and Textar pads of the same vintage. So I swapped them out for some Zimmerman cross drilled rotors, and OE pads and the squeak so far has went away.

The cross drilled rotors seem to make a little noise because of the holes.

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