warped disc
 

when i do med to hard braking, i get a wobble in the steering, and im guessing that my dics have warped.

is there any way of getting them skimmed to make them ture again?

thanks
ian

Just replace them, they warp as they heat up so skimming will not cure the problem. Change the pads at the same time.

Might NOT be warped.

It could also be deposits on the disc, front, rear, or both.

I've recently had some brake judder, it turned out to be corroded discs, but my car WAS off the road for nearly a year.......

To clean off any deposits, do a few high speed brakings, start at around 40mph, increase to the legal limit and stand on the brakes. Do NOT do it on wet roads:eek:

I had similar problem. Took out pads and rubbed them on wet & dry paper. did all four wheels. problem cured.

has anyone used this place before?, they are not to far away from me, and he said he would do the front for £70

http://www.discskimmers.com/2.html

You can buy new discs for less than that.

Hi Ian
I take it from your wanted thread you have my 2 piece 335mm discs fitted , it could be something as simple as a rust build up between the discs and bells causing the disc to run out of true on the bell , take the bells off the discs and make sure all the mating surfaces are clean and corrosion free , clean them up with WD40 and emery cloth or a scotch pad.

I dont recommend using those on car discs skimmers as it could just be masking another problem

I'm coming back from holidays this weekend so can discuss it more with you Monday when I'm back in work.

It's rare for our 335mm discs to warp due to the size and thickness of them , if they are warped I can skim them for you , we take the bell off to do them so they are done right

Hope this helps
Cheers Ian

Hi Ian

that sounds like a plan

yes it is your 335mm set

ill chat to you when your back

thanks
ian

2 front dics for £70!! show me where!! (335mm godspeed ones) :thumb:

You hadn't specified that you had oversized discs.;)

Interested in this, let me know how you get on as I think I may have similar problem. Discs and bells where unused for a year but now fitted to my car and I have severe judder from 50mph. Genuine 355mm AP Discs and bells I believe.

Sorry to jump in on your thread but it seems we are in the same boat :thumb:

It can be a problem for any make disc and bell , more so with cars not used much , or people who wash there cars then park them up , the discs end up rusting , which is not a problem where the pads sit as it will clean the rust off as soon as you brake , but it does get under the bell over time , rusts , and then the disc and bell lift from each other causing the disc to run out of true.

Hope this helps
Cheers Ian

Will any harm be caused until I have time to break them down and give them a good clean up ie. Will I be ok with a 60 mile journey in the morning? Thanks for your help Ian.

Hi
If the shaking was bad , doing hundreds probably thousands of miles could end up damaging track rod ends or bushes , but you wouldn't do any damage driving 60 miles , it would be more annoying than damaging
Cheers Ian

Just a thought but when fitted we just bent the muc gaurd away from the disc (bit of an after thought) could they be touching the disc and causing a problem. Just want to rule all options out when removing wheels etc... So I don't end up going back over old ground every day for a week.

Thanks for your help Ian... Top man :thumb:

Hi
The stone guard would give you a scraping noise , but would never cause any steering wheel shake
Cheers Ian

Hubs, rotors, bells all cleaned up, stone gaurd removed, wheels re-balanced, 4 wheel alignment done and still juddering. Think I have covered all bases. Anything more you could do at your end Ian or is it looking like I may actually have warped discs?

Andy

Did you SCRUPULOUSLY clean the disc to hub mating surfaces? Both disc and hub?

Have you had the pads off and rubbed them on wet-or-dry?

Have you tried a few stops from quick?

Only two things left then , either pad deposits on the discs , go out and give them a good hiding so they are very very hot and see if that makes a difference , if not then the discs need a skim

ok getting strange now.... steering now shakes at 60mph without use of the brake!?

If it does it without using the brakes , its not the brakes

Turns out the guy who balanced the wheels was blind...... had them done again and back to just brake judder now. Ian would having you skim the discs cure the problem or would it just hide it for a while? and how much do you charge as I would sooner bring it to you and then you can check I have cleaned up the hub, bells etc to a decent standard.

I had mine done recently and it has made a massive difference / improvement.

I was getting to the stage that when slowly coming to a halt the car was lurching badly and it was very uncomfortable ... and at the other end of the scale when breaking hard from 'quick' the car was very unsettled and hard to handle.

I should re-emphasize the point made though that rust buildup between the hub and the disk could be your problem. Certainly it had made my alignment worse as the skimming machine couldn't even center itself as it had so much buildup.

Once cleaned up, the machine worked a treat and as I say the difference is massive.

I've a track day coming up in early Aug, so that will be the real test, but I thought £66 vs a new set of discs was at least worth a try .. and for the moment it seems to be working

You can try skimming but when mine were done it fixed, but didn't last for long
Trust me your discs are warped mate, I had the same problem with numerous solutions to no avail.
Some discs CANNOT handle very hard driving and warp,(cheap crap metal), replaced discs with second hand brembos ones to test and no judder, a friend of mine had the same problem too with newish discs. Soon as he went to Cadwell his discs warped due to heat temps. And he has replaced discs and all fixed.
My actual opinion only:thumb: