one side fast wearing brake pad

MERCURY
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JAE YOO
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98 Villager 120k miles ABS
I replaced front break pads and driver side rotor 15000 miles ago and now Passanger side pads are worn half way but driver side completely (unevenly, piston side worn more than outside). Yesterday when I was replacing passanger side pads, caliper piston was pushed in easy with a clamp, but driver side piston was pushed in only half way and I had to open bleed valve slightly to push piston in rest of the way.
After replacing pads, I was driving around and break was working fine but smelled hot break. I am thinking caliper piston might not be returning but I haven't take wheel out to look at it yet. I am wondering what the problem might be, can you help me , thanks.
Jul 5, 2007 at 8:15 AM
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Couple thoughts.

Was the caliper hardware and slide surfaces cleaner thoroughly and lubricated with high temp grease? IF so, may want to get a pair of calipers for the front. The cost of them have come down so it isn't a real expensive ordeal. Clean and adjust the rear brakes at the same time to keep the braking more even.

Also make sure the suspension and steering parts are tight so that there is no abnormal pressure.
Jul 5, 2007 at 9:27 AM