OVERKILL
$100 Site Donor 2021
On the M5.
I developed a "squeek squeek squeek" from the right front wheel that goes away the instant you touch the brake pedal.
Brake pads are relatively new and have PLENTY of meat on them.
Rotors are OE and were machined.
There appears to be a little bit of a thickness variation in the rotor (can't feel it in the pedal) because with this wheel off the ground:
A). It doesn't "spin" freely. You can rotate it, but it doesn't continue to spin.
B). If you spin it fast enough you can reproduce the squeek.
C). There's a small "easy" spot when rotating it where it spins easier, but then goes back to the way it was.
Yesterday I pulled the wheel looking for the source of the noise. It seemed to come from the caliper/pad/rotor interface.
I removed the caliper.
I was able to then "spin" the rotor with very little effort and it kept spinning with no funny feel to it at all. So the wheel bearing is fine.
I took a file to all the sliding surfaces, pulled the pins, cleaned them, lubed everything with Permatex synthetic brake lube and reassembled.
Problem is still there. It is like the caliper is putting just a bit of pressure on the pad and it shouldn't be. The calipers are original, and while not "high mileage", they are old. I'm not sure if the original owner ever had the brake fluid changed either. Most likely not.
I'm thinking the caliper is on its way out.
Thoughts?
I developed a "squeek squeek squeek" from the right front wheel that goes away the instant you touch the brake pedal.
Brake pads are relatively new and have PLENTY of meat on them.
Rotors are OE and were machined.
There appears to be a little bit of a thickness variation in the rotor (can't feel it in the pedal) because with this wheel off the ground:
A). It doesn't "spin" freely. You can rotate it, but it doesn't continue to spin.
B). If you spin it fast enough you can reproduce the squeek.
C). There's a small "easy" spot when rotating it where it spins easier, but then goes back to the way it was.
Yesterday I pulled the wheel looking for the source of the noise. It seemed to come from the caliper/pad/rotor interface.
I removed the caliper.
I was able to then "spin" the rotor with very little effort and it kept spinning with no funny feel to it at all. So the wheel bearing is fine.
I took a file to all the sliding surfaces, pulled the pins, cleaned them, lubed everything with Permatex synthetic brake lube and reassembled.
Problem is still there. It is like the caliper is putting just a bit of pressure on the pad and it shouldn't be. The calipers are original, and while not "high mileage", they are old. I'm not sure if the original owner ever had the brake fluid changed either. Most likely not.
I'm thinking the caliper is on its way out.
Thoughts?