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[tunnie]

Brake Warning came on for MotherT's Estate, stripped down to investigate & add new pads. But they have worn unevenly, so going to replace the discs too.

Now outside looks fine:



Pad looked ok on the outside:



But inside pad looked like this:



Disc...



Looks like drivers side disc maybe similar as the outside edge is corroded, put the old pads back for now. As I'll get some fresh fluid too, might as well as its due a change too.

But wondering why its worn so badly on one side? Would a sticking caliper not do it on the outside as well? 

[b4ndit]

it could be the sliders are sticking, maybe in need of a good clean and grease the pins

[tunnie]

it could be the sliders are sticking, maybe in need of a good clean and grease the pins

Good point, will do that. They just pop out don't they?

[Doctor Gollum]

Could it be, that the pad got stuck on the inner edge near the hub? So as it wears and the piston moves out, that particular pad is leaning over...? Maybe? Or the pad was not seated correctly.

But yes first thing to check is that the calliper sliders move freely. But you would have checked that I'm sure.

[tunnie]

move ok now, but could have got stuck, will grease them and also give caliper bracket a good clean

[Andy B]

I can't see your pictures, but if they are anything like those I took of my car when I replaced my discs a couple of years ago, the outer face of each disc was almost perfect ( a few grooves, but nothing much) The inner faces though, were only worn on about a third of the surface leaving the rest covered in scale/rust

[tunnie]

I can't see your pictures, but if they are anything like those I took of my car when I replaced my discs a couple of years ago, the outer face of each disc was almost perfect ( a few grooves, but nothing much) The inner faces though, were only worn on about a third of the surface leaving the rest covered in scale/rust

Identical issue here   

[henryd]

I can't see your pictures, but if they are anything like those I took of my car when I replaced my discs a couple of years ago, the outer face of each disc was almost perfect ( a few grooves, but nothing much) The inner faces though, were only worn on about a third of the surface leaving the rest covered in scale/rust

Identical issue here   

The inside of the discs gets the splash from the other wheel therefore deteriorates faster

[05omegav6]

Often found that the inner pads wear first with that design caliper All three of my Mk3 Granadas were the same

[dbdb]

I can't see your pictures, but if they are anything like those I took of my car when I replaced my discs a couple of years ago, the outer face of each disc was almost perfect ( a few grooves, but nothing much) The inner faces though, were only worn on about a third of the surface leaving the rest covered in scale/rust

Me too, just had the front wheels off and inspected them  Outer disk shiny and smooth to the edge, inner surface only clean and shiny 1/2" in from the edge on o/s, 1 inch in on n/s (worse).  These brakes must have been like this last August when they passed an MOT no problem and I suspect they may do the same this year.  However the car judders under heavy braking from speed as you can imagine.

As the inside edge surface is rusty and rough and above the level of the shiny surface it's clear the pads don't ever  touch it.  So either the pads are missing some of their surface or they are being applied  to the part nearest the hub only. Is there any other explanation? 

As I never brake in my driving  it rarely bothers me and I'm reluctant to replace the disks but I suppose I must.

[Andy B]

....
As I never brake in my driving    .......

  Not another one that 'brakes' on the gearbox! It's great for the poor soul behind!   

[Andy B]

I can't see your pictures, but if they are anything like those I took of my car when I replaced my discs a couple of years ago, the outer face of each disc was almost perfect ( a few grooves, but nothing much) The inner faces though, were only worn on about a third of the surface leaving the rest covered in scale/rust

Identical issue here   

These were mine. Surprisingly  my brakes improved no end when I fitted new discs. 
outer face


and inner face

[tunnie]

Yup exactly like MotherT's!

[tigers_gonads]

Tbh, I pull my wheels off every few months and abuse the discs and calliper's with Percy the lump hammer 
Tends to break up any rust on the disc's any keep the calliper's free   

Great for stress relief too 

[Andy B]

Tbh, I pull my wheels off every few months and abuse the discs and calliper's with Percy the lump hammer 
Tends to break up any rust on the disc's any keep the calliper's free   

Great for stress relief too 

if the dust shield is in place, you can't see, let alone hit, the inner face