Omega Owners Forum
Omega Help Area => Omega General Help => Topic started by: tigers_gonads on 03 April 2015, 09:03:47
-
Only been on 6 months and covered less then 3000 miles and I have a friggin ridge on the outside of the disc already >:(
Anybody else noticed this ?
Have Vauxhall started slipping in cheep crap under the guise of OEM ?
Is it time to start using pattern discs :D
-
chrisgixer reckons by painting them, this is resolved (for new discs). Its certainly something I will try next time I have to change discs.
-
chrisgixer reckons by painting them, this is resolved (for new discs). Its certainly something I will try next time I have to change discs.
To be precise, painting them keeps the rust away long enough to get full wear out of the disc before the rust eats in from the outer edge of the inboard face, and chips away the inside swept area.
Obviously paint can't possibly help with disc wear from the pads. A ridge from the swept area v the untouched area is part of normal wear.
Question is, is the wear excessive?
How high is the ridge? Is the wear a abnormal?
-
chrisgixer - if you theory of rust creeping in from the outside edge (which sounds valid enough), why does it only affect the inner face of the disc, not the outer?
Me no understandie :-[
-
Could be a casting issue...
The rough casting of the inner hub circumference where the spines start around the hub allowing a build up of moisture laden crud whereas the disc face is relatively smooth, as is the hub...
That rough inner is about the only unmachined surface on the disc, and directlty affects only the inner disc face :-\
-
chrisgixer - if you theory of rust creeping in from the outside edge (which sounds valid enough), why does it only affect the inner face of the disc, not the outer?
Me no understandie :-[
Who gives a shit. Paint them. No more problem.
....well, not a problem that affects the life/use of the disc anyway, as the rust will eventually break through, just later in the discs life.
Anyway, your hijacking again, as the op's description makes mo mention of rust. (So far)
Sounds like an excessive wear problem in this case.
-
Only been on 6 months and covered less then 3000 miles and I have a friggin ridge on the outside of the disc already >:(
Anybody else noticed this ?
Have Vauxhall started slipping in cheep crap under the guise of OEM ?
Is it time to start using pattern discs :D
How deep is the ridge? A pic? ....or a measurement perhaps? :)
-
chrisgixer - if you theory of rust creeping in from the outside edge (which sounds valid enough), why does it only affect the inner face of the disc, not the outer?
Me no understandie :-[
Who gives a shit. Paint them. No more problem.
....well, not a problem that affects the life/use of the disc anyway, as the rust will eventually break through, just later in the discs life.
Anyway, your hijacking again, as the op's description makes mo mention of rust. (So far)
Sounds like an excessive wear problem in this case.
Sorry, bit abrupt, but factually to the point. Hopefully ? ;D
-
Are you saying that the rust is getting between the disc & pad (on the top edge) and therefore acting like a sort of grinding paste :-\
-
Are you saying that the rust is getting between the disc & pad (on the top edge) and therefore acting like a sort of grinding paste :-\
I dont think this is a rust problem for the op. Or at least it's not mentioned.
TB is talking about a rust problem that kills all omega front discs for all but the most high mileage of drivers in that, the rust on the outer vented edge of the disc chips off, and will eventually eat into the swept area. This cause vibration and loss of performance, but for some reason does do on the inner face more than the outer face. Hence the no understandment.
-
It's not purely an omega problem btw. Most car discs do so to a greater or lesser extent.
-
3000 miles in 6 months means the car is sat rusting 99% of the time
the inside face of the disc gets the salt road spray but the mud shield prevents it being washed off again (the outside face is unshielded - you can see it through the wheel spokes and the salt gets washed off)
-
Here's an old thread explaining TB's post.
http://oldsite.omegaowners.com//forum/YaBB.pl?num=1243976524
As said it not just omega, and, not just the fronts.
-
Looks like we need the op to explain his ridge? Is it rust? Or wear?
-
Looks like we need the op to explain his ridge? Is it rust? Or wear?
If it is wear then it is very unlikely that the quality of the steel has changed enough to be significant - much more likely to be (as BIGtime said) due to the surface rust acting as grinding paste.
-
Looks like we need the op to explain his ridge? Is it rust? Or wear?
If it is wear then it is very unlikely that the quality of the steel has changed enough to be significant - much more likely to be (as BIGtime said) due to the surface rust acting as grinding paste.
As you can see from the pic in the link, the rust comes in from the edge, UNDER the swept area. I fail to see how surface rust can make large chunks chip chunks chip off.
But whatever, as said, painting sorts it for long enough to wear the discs out before the rust kills them. (Heat resistant paint obviously)
-
Looks like we need the op to explain his ridge? Is it rust? Or wear?
If it is wear then it is very unlikely that the quality of the steel has changed enough to be significant - much more likely to be (as BIGtime said) due to the surface rust acting as grinding paste.
As you can see from the pic in the link, the rust comes in from the edge, UNDER the swept area. I fail to see how surface rust can make large chunks chip chunks chip off.
But whatever, as said, painting sorts it for long enough to wear the discs out before the rust kills them. (Heat resistant paint obviously)
stage 1 - shiny new discs and pads - all good :y
stage 2 - park overnight in the rain - first application of brakes next day and you can feel the surface rust grinding off :(
stage 3 - park for a week (say) - rust gets more advanced and causes some pitting. First application of the brakes wipes the surface rust off but the pitting remains. The pitting allows some flakes of rust to develop and the pits and flakes chew away bits of the pad. The damage is now done. Rust can develop unhindered on this part of the disc because of the pits AND because the pad has a chunk missing. The area affected can start right at the edge but it grows as the edge of it progressively eats away more of the pad >:(
My Omega is doing 18,000 miles a year at the moment & it hasn't ever reached stage 3 but my old Range Rover hasn't moved for a while & the discs are scrap :(
-
So, paint them, then!
The rust doesn't come in on the surface to cause the damage described, it creaps in from the edge, although parking up doesn't help as the pads rust to the disc causing the radial "spoke" marks in the pic. There's no avoiding that.
But as said, if you want to avoid that rust line that creeps in from the edge to meat those cracks, then paint the discs in areas that are not covered by the swept area.
In the vents, on the outer edge, and the centre hub area.
At the end of the day, that's all there is. Apart from buying pre painted/treated discs. There is no protection for the swept area. No matter what.
-
Sorry for the delay in getting back to you lot on this
Spend most of yesterday sat / laid on muddy grass verges / laid in puddles rebuilding the front suspension.
The only time it stopped raining was when I stopped for a sandwich / went for a dump :(
I must be getting old because i'm aching like a bastard and sneezing my friggin head off now :'(
And to say I used to really enjoy this sort of thing ::) ;D
Don't bother with the sympathy because I know your all laughing really >:( ;D ;D ;D
Okay, back to the disc ............... The ridge is on the outside of the drivers side disc only.
Only about 2mm into the face and about 1mm deep.
The inside is totally unmarked.
Pads on both sides are hardly worn and even across the friction face.
Passenger side disc looks like its fresh out of the box
Other then a couple of hard runs, its been sat outside the house for the last month or so :(
With the lads corsa there, its a no brainer really ........... 50 mpg plus vs 15 mpg ;)
Right, off to pop some pills now .............. :D :D
-
Hi chaps i had vx front disc on front 6 months ago, they do tend to look rusty if sat for a few days but they are as flat and smooth as the day they went on 4 k later.maybe you have a sticky caliper causing exssive wear :y
-
Interesting how it has only occured on the outside of the right hand disc. Dodgy abrasive pad? Doubt it. More exposed to weather while parked? Maybe. I have long believed that daily use is the best way of minimising disc corrosion by rubbing off overnight layer of rust before it takes hold. Before asbestos was demonised disc wear ws much less.
-
Interesting how it has only occured on the outside of the right hand disc. Dodgy abrasive pad? Doubt it. More exposed to weather while parked? Maybe. I have long believed that daily use is the best way of minimising disc corrosion by rubbing off overnight layer of rust before it takes hold. Before asbestos was demonised disc wear ws much less.
Sticky caliper theory I like. On the back I have had seized pads so only one pad and one disc side does any work. On the front we have a sliding caliper arrangement, but if the caliper sticks that reverts to braking one side of disc only too. Trouble with that theory is piston is on the inside nd TG's disc scored on the outside.
-
Interesting how it has only occured on the outside of the right hand disc. Dodgy abrasive pad? Doubt it. More exposed to weather while parked? Maybe. I have long believed that daily use is the best way of minimising disc corrosion by rubbing off overnight layer of rust before it takes hold. Before asbestos was demonised disc wear ws much less.
Sticky caliper theory I like. On the back I have had seized pads so only one pad and one disc side does any work. On the front we have a sliding caliper arrangement, but if the caliper sticks that reverts to braking one side of disc only too. Trouble with that theory is piston is on the inside nd TG's disc scored on the outside.
That was probably caused by a stone getting trapped between the caliper and disc.
Might be worth pulling the pads out to check that there is nothing else trapped in there.
-
Sorry for the delay in getting back to you lot on this
Spend most of yesterday sat / laid on muddy grass verges / laid in puddles rebuilding the front suspension.
The only time it stopped raining was when I stopped for a sandwich / went for a dump :(
I must be getting old because i'm aching like a bastard and sneezing my friggin head off now :'(
And to say I used to really enjoy this sort of thing ::) ;D
Don't bother with the sympathy because I know your all laughing really >:( ;D ;D ;D
Okay, back to the disc ............... The ridge is on the outside of the drivers side disc only.
Only about 2mm into the face and about 1mm deep.
The inside is totally unmarked.
Pads on both sides are hardly worn and even across the friction face.
Passenger side disc looks like its fresh out of the box
Other then a couple of hard runs, its been sat outside the house for the last month or so :(
With the lads corsa there, its a no brainer really ........... 50 mpg plus vs 15 mpg ;)
Right, off to pop some pills now .............. :D :D
No pain no gain ::) :P Get on with it you lazy git ;D
-
Sorry for the delay in getting back to you lot on this
Spend most of yesterday sat / laid on muddy grass verges / laid in puddles rebuilding the front suspension.
The only time it stopped raining was when I stopped for a sandwich / went for a dump :(
I must be getting old because i'm aching like a bastard and sneezing my friggin head off now :'(
And to say I used to really enjoy this sort of thing ::) ;D
Don't bother with the sympathy because I know your all laughing really >:( ;D ;D ;D
Okay, back to the disc ............... The ridge is on the outside of the drivers side disc only.
Only about 2mm into the face and about 1mm deep.
The inside is totally unmarked.
Pads on both sides are hardly worn and even across the friction face.
Passenger side disc looks like its fresh out of the box
Other then a couple of hard runs, its been sat outside the house for the last month or so :(
With the lads corsa there, its a no brainer really ........... 50 mpg plus vs 15 mpg ;)
Right, off to pop some pills now .............. :D :D
No pain no gain ::) :P Get on with it you lazy git ;D
And you get ferked too >:( :P :P ;D ;D