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1991 560SEL: New Meyle rotors and Wagner Thermo Quiet disc pads - TIGHT FIT!!
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Installed Wagner Thermo Quiet brake pads on new Meyle vented front disc rotors.
I had to use a pry bar to move the pistons back far enough so I could install the brake pads. The instructions for these particular brake pads say to not install any chemical compounds on the insulator area (whatever that is). I went ahead and installed Mercedes Benz Brake paste on the backs of the pads and the holes as well as the brake pins. As you can see from the photos, the pads are in their TIGHT! They are so tight the rotor doesn't spin freely. As a matter of fact, it doesn't spin at all. What am I doing wrong? |
Just found this advice on another forum, what do you think?
"Once in a while I encounter the same situation, particularly if I get the parts from AutoZone or Advance. Leave any anti-squeal feature in place or you'll be reminded that you removed them every time you hit the brakes. Best thing to do is to put each pad in a vise horizontally and carefully sand it down with a belt sander with a medium grit belt in it (parallel to the long dimension of the pad). That keeps it pretty flat and even. Don't forget to maintain a bevel on the leading edges of the pads. After doing this, everything fits. Next time, get your parts at someplace like NAPA and they'll fit the first time." |
If it took that much effort to compressor the calipers then i would have to say they are seized, and should be replaced.
Where is the rest of the hardware, springs are missing. The pads probably fit tightly because the calipers are not fully compressed |
I would say one or the other is the wrong part .If the pistons are back as far as they can go.Then get the disc dim , and check the new one if it righ then the pads are wrong. To me the pads look over size.
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Well, Meyle makes basically only junk now. I easily suspect oversize rotors and excess run out.
As others pointed out, perhaps you have a seized piston on the caliper. Do not forget to set bearing end play up front! |
Well.....I wasn't too happy when the Myele rotors arrived but it would have cost a small fortune to ship them back. So, decided to ride the tiger and see what happened.
I used a belt sander and managed to take some pad material off the Wagner ceramic brake pads so that the pads now fit easier. Question; I can now turn the rotor but the pads drag a bit. I'm thinking that I should go ahead and install the new rotor and pads on the left side of the car, replace the brake fluid and pressure bleed the system. Then bed the brake pads in properly using the usual stop and go braking. Or.....should I pull out the pads and shave some more material off so that the rotor can spin freely? |
Do you still bed in pads?
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Are the pistons fully seated?
Are the rotors the correct thickness? Are the pads the correct thickness? Once you answer these questions then you will have your answer. Disc brakes have no return spring. Once you drive a bit and stop, if you jack up the wheel it will spin. |
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