Quote:
|
Originally Posted by citizen
tell you what, wearing faster on the outside is normal. heres the reason why: the outside of the rotor spins around a larger radius, so it travels around at a faster speed. faster speed equals more enegry, more energy equals more friction/heat, the more friction/heat the more wear. not much you can do except change the laws of physics.
|
Thank you for the physics lesson
Maybe you should look at all the pictures, they're not wearing faster on the outside, they're wearing
unevenly.
Quote:
|
Originally Posted by idlafie
Hmmmm....you didn't mention it in your original post so I decided to check your profile to see what year your car was....97 eh? I was going to say it might have been due to possible overtightening, or uneven tightening of the lug nuts in relations to the rotor..(clamping force of brake rotor/wheels/rims to hub uneven possibly)...but that wouldn't really apply if you had a five lug hub in comparison to a four lug hub. Then it dawned on me that it's possible that the bearings on the rear hubs may be worn or shot. Have you inspected them lately??
I don't think the problem is with your calipers as you mentioned that the pads you've installed have worn the same on both rear sides. But then again I could be wrong. The pads in the stock rear calipers kinda float within the clamping portion of the caliper. Bout the only thing I can think that would affect that floating action would be either worn caliper pins or sticking/binding caliper pins. When you swapped the brake pads out on the rear the last time you serviced the brakes, did you clean & re-lubricate the caliper sliding pins? Are the caliper sliding pin boots still in good shap?? Other than that, about the only thing I can think of is either air in the line, (but you would notice that), OR maybe a stuck/misaligned E-brake cable or cable binding in the E-brake system/assembly. You might want to check those out too.
Good luck trying to figure this one out...it's gonna be a doozy...And when you do, let us know so we know what to expect in the future. Anyhow, hope this helps...
|
I regreased the pins on one of the sides, still the same uneven wear. As for the bearings, I was planning on taking the rear shield off (man it looks dumb when the front is gone) but I couldn't get the wheel bearing and flange seperated from the axle housing. The bearing itself operated smoothly but the flange was what was stuck. I'm hoping that one of my mechanic friends has the right gauges so I can measure the axial end play, but I think it will be ok since there is no wobbling in the rear that I can tell. The parking brake isn't causing the pads to bind up and works fine so I don't think that isn't it either.
Not sure if this explination will make sense but here goes anyway. I noticed yesterday when I was putting the calipers back on that when I had them lined up (the outside of the caliper flush against the pad) and I started tightening the pin bolts I could feel the caliper pull up. I'm not really sure what would cause this since the pins themselves look fine.