Strange rear brake pad wear

vferdman · Post by **vferdman** » 02 Sep 2009, 16:20

Hi. I am changing my rear pads on my '98 S70 N/A and noticing a very strange wear pattern. The inboard pad is definitely worn with only 1.3 mm of material left, the outboard pad's material is at 5 mm! Very similar on both sides, too. The calipers are not frozen as I was able to easily collapse both pistons in each caliper. What is going on? Or is this normal? My car is a manual transmission, so I do not go through brakes so much. In fact, when the car had only 31K miles the rotors got warped and were replaced under warranty along with pads. Now the car has 85K miles and still on the same set of rear pads. No issues with the brakes, they seem to perform great.

Would appreciate others' experience with rear pad wear on this model.

Thanks!

Post by **JDS60R** » 02 Sep 2009, 21:26

They may have gone in well but the outer did not go as far as the inner cylinder. Perhaps the caliper has a ridge to overcome.

More likely is an air bubble in the outer chamber.

I do not have experience with changing too many on this year and model so it will be interesting to see what others say.

Were the sliding pins ok? any damamge or ridge on them?

FCPEURO · Post by **FCPEURO** » 03 Sep 2009, 08:47

If it is the rear brake pads, then one of the cylinders are sticking or there is air in the line. If it is the front pads, then the caliper guides are probably sticking.