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[tunnie]

It appears to be "normal" for the inside lower part of disc to rust up, just wondering what can cause this? Its not specific to this car, as many people have had exactly same 

Outside is always perfect:



Yet the inside goes like this:



The Pad warning had come on, the discs themselves on the outside at least had plenty of life left, but because the inside was feked, I could not just slap new pads in, so discs and pads had to be fitted:



The caliper is free and moving fine, the pads were fitted correctly.  Anything we can do to prevent this? 

[henryd]

The inside of the disc lives in a much harsher enviroment than the outside,any crap thrown up by the opposite wheel is going to splash the inside of the disc causing it to corrode quicker,made worse by many modern cars not have splash shields behind the discs any more.

[VXL V6]

Presumably its something to do with the caliper design, the inside pad is pressed against the disc with the piston, the outside is pressed against the disc by the force of the caliper movement.

[TheBoy]

I think its caliper design, but only seen this on (virtually all) Omegas, never other cars...

[Mr.OmegaMan]

Same problem on both mine also  , Still have the old discs outside will take a quick pic.

[tunnie]

The inside of the disc lives in a much harsher enviroment than the outside,any crap thrown up by the opposite wheel is going to splash the inside of the disc causing it to corrode quicker,made worse by many modern cars not have splash shields behind the discs any more.

Its more than that though, the pad wears un-evenly, as others have mentioned it appears to be a caliper design issue. Just wondering if anything can be done to prevent it 

[TheBoy]

The inside of the disc lives in a much harsher enviroment than the outside,any crap thrown up by the opposite wheel is going to splash the inside of the disc causing it to corrode quicker,made worse by many modern cars not have splash shields behind the discs any more.

Its more than that though, the pad wears un-evenly, as others have mentioned it appears to be a caliper design issue. Just wondering if anything can be done to prevent it 

Not that you'd be prepared to do...

[tunnie]

The inside of the disc lives in a much harsher enviroment than the outside,any crap thrown up by the opposite wheel is going to splash the inside of the disc causing it to corrode quicker,made worse by many modern cars not have splash shields behind the discs any more.

Its more than that though, the pad wears un-evenly, as others have mentioned it appears to be a caliper design issue. Just wondering if anything can be done to prevent it 

Not that you'd be prepared to do...

Shame 

[Webby the Bear]

its interestin how the rim of corrosion is completely even.

[TheBoy]

The inside of the disc lives in a much harsher enviroment than the outside,any crap thrown up by the opposite wheel is going to splash the inside of the disc causing it to corrode quicker,made worse by many modern cars not have splash shields behind the discs any more.

Its more than that though, the pad wears un-evenly, as others have mentioned it appears to be a caliper design issue. Just wondering if anything can be done to prevent it 

Not that you'd be prepared to do...

Shame 

£100 every couple of years (or every 5 in your case ), not worth the bother...

[Mr.OmegaMan]

Been standing outside for a few weeks so a little rusty.

[tunnie]

The inside of the disc lives in a much harsher enviroment than the outside,any crap thrown up by the opposite wheel is going to splash the inside of the disc causing it to corrode quicker,made worse by many modern cars not have splash shields behind the discs any more.

Its more than that though, the pad wears un-evenly, as others have mentioned it appears to be a caliper design issue. Just wondering if anything can be done to prevent it 

Not that you'd be prepared to do...

Shame 

£100 every couple of years (or every 5 in your case ), not worth the bother...

I'd be upset at anything less than that. New discs went on 2.2 this year, last set, was used for that guide 

So that is 6 years from a set of discs, about 70k i think 

[Andy H]

Presumably its something to do with the caliper design, the inside pad is pressed against the disc with the piston, the outside is pressed against the disc by the force of the caliper movement.

I would expect the piston to press the inner pad against the disk first and then, after overcoming any stiction on the slider pins, the frame would move and press outer pad against the disk.

On the Omega I don't think the design of the caliper is the issue. I think it is due to additional corrosion of the inner face (as described above) and intermittent use of the car. I haven't had the issue with my Omegas but I have used them as daily drivers. I expect that the cars that have shown the problem have been used for weekends and holidays.

[tunnie]

Presumably its something to do with the caliper design, the inside pad is pressed against the disc with the piston, the outside is pressed against the disc by the force of the caliper movement.

I would expect the piston to press the inner pad against the disk first and then, after overcoming any stiction on the slider pins, the frame would move and press outer pad against the disk.

On the Omega I don't think the design of the caliper is the issue. I think it is due to additional corrosion of the inner face (as described above) and intermittent use of the car. I haven't had the issue with my Omegas but I have used them as daily drivers. I expect that the cars that have shown the problem have been used for weekends and holidays.

One shown is used every week, on a 150 mile round trip. The 2.2 was the same, that was in very regular use too.

[TheBoy]

Presumably its something to do with the caliper design, the inside pad is pressed against the disc with the piston, the outside is pressed against the disc by the force of the caliper movement.

I would expect the piston to press the inner pad against the disk first and then, after overcoming any stiction on the slider pins, the frame would move and press outer pad against the disk.

On the Omega I don't think the design of the caliper is the issue. I think it is due to additional corrosion of the inner face (as described above) and intermittent use of the car. I haven't had the issue with my Omegas but I have used them as daily drivers. I expect that the cars that have shown the problem have been used for weekends and holidays.

I use mine pretty much daily, and the brakes are definately used enough to stop rust build up, so I remain unconvinced.