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When I replaced my 10bolt with the S60 I went ahead and swapped to rear disk brakes (looking back I wish I'd stayed with drums, or converted everything to 98 disks...). One of my problems now is the brake pads and rotors have a strange wear pattern on them, and in the 2nd pic you can clearly see where the rust spots are on the rotor, even though the pad should be contacting it there. The guide pins are fully lubricated and the caliper can easily slide back and forth on them.
In this pic you can see the difference between where the pad is contacting the rotor and where it is not... Also, the inner pad does not completely line up with the outside diameter of the rotor. There is about 1/16" of the pad that is not worn at all (it's highlighted red). Kindly ignore the lovely "made in china" air hose...:eyes:
When I looked at the inner pad after I took the pics last night there was visibly more pad material on the part that was rough vs the part that was smooth. To me this indicates an uneven application of pressure, but how??
In this pic you can see where the outer pad should be contacting the rotor, but isn't. The inner side of the rotor does not have this issue, and despite there being uneven wear on the inner pad, that rotor surface is worn pretty evenly. I do not know why the rust spots look like spray cheese...I think it was the flash of my phone's camera.
Lastly, sometimes I would hear a "scrape scrape scrape" noise when turning. I looked at the mounting braket and it seemed very close to the rotor. I shaved that part of the bracket down (it does not come into contact with the pad or caliper, so I don't see how it could cause uneven wear. AND my pads were wearing strangly before I shaved it down), and the scraping noise has not come back. A .025" feeler gauge fits in with some wiggle room, so I'm guessing the clearance is aboue .030". Is this normal?
Parts replaced:
Calipers & Mounting brakets: I ordered the calipers and mounting brakets from partstrain.com. I no longer have the boxes they came in, so I do not think I can return them. I did notice that the driver's side braket they sent me said "corvette" on it. It had a different size both thread and was slightly closer to the rotor than the passenger side bracket. I reecntly aquired a stock bracket from a junkyard and mounted it on the drivers side, but it has not made a difference.
Pads--- The 1st set of pads I had were the economy ones from Advance. I replaced those and the current ones are the economy ones from NAPA (I wanted to fix the issue before spending $60+ on pads...).
Rotors--- The first set of rotors I had were also from Advance, but the driver side rotor acted/wore/looked like it was slightly warped, so they replaced those rotors with my current ones.
Lastly, the brakes will sometimes make a loud groaning noise when moving at ~5mph or an idle speed. If I apply pressure to the brakes, the sound stops.
QUESTION SUMMARY
1) Is is possible that BOTH of the calipers are not cast properly? I am currently at a loss for what I should do...
2) What are possible reasons for the calipers of boths sides to be applying uneven pressure to the pads?
3) Is .030" clearance between the mounting braket and the rotor normal?
In this pic you can see the difference between where the pad is contacting the rotor and where it is not... Also, the inner pad does not completely line up with the outside diameter of the rotor. There is about 1/16" of the pad that is not worn at all (it's highlighted red). Kindly ignore the lovely "made in china" air hose...:eyes:
When I looked at the inner pad after I took the pics last night there was visibly more pad material on the part that was rough vs the part that was smooth. To me this indicates an uneven application of pressure, but how??
In this pic you can see where the outer pad should be contacting the rotor, but isn't. The inner side of the rotor does not have this issue, and despite there being uneven wear on the inner pad, that rotor surface is worn pretty evenly. I do not know why the rust spots look like spray cheese...I think it was the flash of my phone's camera.
Lastly, sometimes I would hear a "scrape scrape scrape" noise when turning. I looked at the mounting braket and it seemed very close to the rotor. I shaved that part of the bracket down (it does not come into contact with the pad or caliper, so I don't see how it could cause uneven wear. AND my pads were wearing strangly before I shaved it down), and the scraping noise has not come back. A .025" feeler gauge fits in with some wiggle room, so I'm guessing the clearance is aboue .030". Is this normal?
Parts replaced:
Calipers & Mounting brakets: I ordered the calipers and mounting brakets from partstrain.com. I no longer have the boxes they came in, so I do not think I can return them. I did notice that the driver's side braket they sent me said "corvette" on it. It had a different size both thread and was slightly closer to the rotor than the passenger side bracket. I reecntly aquired a stock bracket from a junkyard and mounted it on the drivers side, but it has not made a difference.
Pads--- The 1st set of pads I had were the economy ones from Advance. I replaced those and the current ones are the economy ones from NAPA (I wanted to fix the issue before spending $60+ on pads...).
Rotors--- The first set of rotors I had were also from Advance, but the driver side rotor acted/wore/looked like it was slightly warped, so they replaced those rotors with my current ones.
Lastly, the brakes will sometimes make a loud groaning noise when moving at ~5mph or an idle speed. If I apply pressure to the brakes, the sound stops.
QUESTION SUMMARY
1) Is is possible that BOTH of the calipers are not cast properly? I am currently at a loss for what I should do...
2) What are possible reasons for the calipers of boths sides to be applying uneven pressure to the pads?
3) Is .030" clearance between the mounting braket and the rotor normal?
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