I came down with a brake squeal in the front of my Disco, so I pulled the wheel and checked the brakes. Found I had a stuck guide slide and ordered a new one. When I was putting the brakes back together for use until the bracket comes in, the braking material came off of the backing pad by hand. I only did the brakes two years ago and used Hawk HPS pads, I have never heard of pads doing this. Could this be from excessive heat from the guides not allowing the caliper to fully retract the pads from the rotor? Both front and back side pads did this, not just the side that was stuck against the rotor all the time.
I've heard about this happening before with hawk pads, but have zero experience with their stuff.
Its either heat, rust or E36 M3 quality.
About 30 years ago, I put a set of pads in a Ford E150 van, failing to notice that there was only one rivet and a bit of mucilage holding one of them together. That didn't work for long.
Of course, at the time, if you bought ten sets of the common pads to fit 93% of the vehicles on the road, you got them for about seven bucks a box...
This used to be a very common failure mode, like mid-late 90s, on street pads.
The pad material/backing plate interface rusts and jacks the pad away from the backing plate.
Used to get things like J/N-bodies or K-cars with a brake squeal, pop the calipers off, and find that the lining was only held in place by a mechanical interlock - little mounds of lining still stuck to the backing plate were keeping the rest of the lining from simply falling out.
Given that those vehicles were notoriously underbraked, could be heat, could be age.
Just had that happen to an oem front pad on our Jetta. 111k maybe on borrowed time but was still meaty.
wspohn
SuperDork
10/22/22 10:06 a.m.
Yup - EBC had a spate of this a few years ago. They solved it somehow.
