Technical Unusual Brake Pad Wear Pattern

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Technical Unusual Brake Pad Wear Pattern

The Professor

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About 6,000 miles ago I changed all the brake pads on my Multijet 120 Active Sport and fitted EBC 'black' pads. That turned out to be a big mistake - they squealed like a banshee at the front as they don't come with anti-squeal shims (which are riveted onto the original fit pads). After they sent me some stick-on anti-squeal shims the problem is much better, but the brakes do sound as if the friction material is very harsh, even under moderate braking. I never noticed a sound with the OE originals and don't think I'd recommend them or use them again. Also, the real problem is that I've got an unusual wear pattern on the back. The off-side outer rear pad is worn down to about 50% thickness, the other three don't look as if they've had any appreciable use. The braking action is good, pedal feels as it should, the wheel doesn't drag, the handbrake functions and the disc shows no odd scoring, dis-colouration or signs of excessive heat. At the time I managed to re-fit the original anti-squeal shims at the back, didn't have any trouble winding the piston back on the offside and the caliper seemed to slide freely. (On the other hand, the nearside was a pig, even with the L.H. threaded re-wind tool, but that's not the problem.)
Why would just one pad wear much faster than the others? :confused: Any bright ideas anyone?
 
Although the solution sounds unbelievable you already know really, but dont want to think about it.

Its either a seized & partial seizure of one or both calipers (partial on one side only) or a problem with the pistons after the rewind issue last time.
I call strip, replace calipers & pads, examine discs, replace discs if beyond useful service state, bleed & replace brake fluid. (y)
 
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Painful to read...

You know you can break lines, don't you?

Dont you get punctuation? :rolleyes:

For those with difficulty :-
Although the solution sounds unbelievable you already know really, but dont want to think about it.

Its either a seized & partial seizure of one or both calipers (partial on one side only) or
A problem with the pistons after the rewind issue last time.
I call
Strip,
Replace calipers & pads,
Examine discs, replace discs if beyond useful service state,
Bleed & replace brake fluid.
 
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Dont you get punctuation? :rolleyes:

I think Tad means my original post... Which is sort of embarrassing as one of the things I do in my job is produce easy-to-read documents...
I thought I'd put a few more carriage returns in BTW.
Anyway, back on the topic, the only thing that is holding me back from accusing the caliper is the fact that everything seems to be moving freely. I will investigate it a bit more closely now though...
 
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