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  • #16
    Haven't received the detailed cost breakdown yet (IT issue at the garage) but the total was £360 including new OEM pads all round, 2x sensors, VAT.

    Will confirm next week, but seems like circa £50 per disc - money well spend IMO. Much better solution at all levels than replacing discs (unless discs are worn beyond limits of course). Machining compensates for any hub play as well as truing discs.

    Highly recommended!
    S54 Titan Silver metallic. Black leather, most factory options including sunroof, Becker Cascade and Becker Silverstone changer.

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    • #17
      Ian,

      I'm glad that you've found the cure to the problem, but what is the cause?

      I've read through your opening post and you've not mentioned if you've had the brake bushings replaced recently; Part 12 in the diagram below.




      These bushing are very soft and they do deteriorate and can even burn away. As my photo below shows, these bushes easily distort.




      I've replaced mine with solid brass bushings, as below, and there's no increase in NVH. I also replaced them on the fronts of my Z4MC and there was a noticeable improvement in brake feel.

      /// Exdos ///
      "Men who try the impossible and fail spectacularly are infinitely superior to those who reach for nothing and succeed" --Napoleon Bonapart

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      • #18
        Exdos,

        Just checked my records and despite many changes of discs/calipers over the cars life, can't see any evidence of the guide bushings being replaced. Unless they come with calipers (guess unlikely) would assume are original - will get my indy to check.

        Your brass upgrades look quality - do you have a supplier of these?

        Above said, the primary cause of my issue appears to have been the front off side disc run out.

        Cheers,
        Ian
        S54 Titan Silver metallic. Black leather, most factory options including sunroof, Becker Cascade and Becker Silverstone changer.

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        • #19
          Originally posted by ian View Post
          Exdos,
          Your brass upgrades look quality - do you have a supplier of these?
          The last lot I bought was from here: http://www.ebay.co.uk/itm/Brand-New-...item3cd0308590

          Make an offer less than £18 so that you don't pay any import duties. The seller was very obliging. You won't get them any cheaper anywhere else. Other sellers always sell these with the pins, but these come without.
          /// Exdos ///
          "Men who try the impossible and fail spectacularly are infinitely superior to those who reach for nothing and succeed" --Napoleon Bonapart

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          • #20
            That's a good price and a good idea to reuse the BMW guides to reduce the costs. I wouldn't recommend the brass bushings for a daily driver though, they need too much regular greasing. The OEM bushes are pretty soft as can be seen in the photo - I had some brand new replacements that were even softer! So I just kept with the old ones.

            But worn bushings won't cause the vibration anyway, it's a rotating part (or the pads touching them) that introduces vibration. The bushes are just to allow the caliper to slide slightly as the pads wear. The reason for the brass upgrade is to control the pad wear better as under heavy use the pads tend to wear at angles due to the soft bush. Some of my old pads can be as much as 5mm material left at one end and almost gone at the other!

            The skimming will just clean up the disc to prevent the judder - I doubt it was runout on the disc but sometimes it has to be done to "start again" with the disc. You may or may not see it come back if the disc and pad combo remains the same. I've got judder on my car at the moment, it's almost like a black art as the setup is the same as I've run before on road and track without any issues (albiet with a new set of pads and discs).
            Last edited by c_w; 14-04-2013, 12:07 PM.

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            • #21
              Vibrating front under braking

              I had precisely the same experience replacing the front discs and pads 3 times over 18 months to no avail. My Indy was sure it was not a bearing issue, despite my pleas. The bearings were replaced 9 months ago, and a small window of no vibration under braking was the result. These bearings failed spectacularly, were replaced with new discs pads again 2 months ago, all well now. The bearings seem to be the issue, not expensive so try this route?
              James

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              • #22
                I've not got vibration on my discs but they are fairly grooved due to using an assortment of aggressive part-worn race pads but the discs aren't that old. I just rang a few local places to me who show up on the on the car skimming Pro-Cut website. First wanted £200(!) to do a pair, so not really worth it at all. This was a car dealer so was expecting a big price but not that high. Maybe they include pads in that price.

                The next place I called was a smaller independent garage but they were insisting on supplying and fitting new pads as it would be wasting their time not doing; I can understand the theory why they want to fit new pads but I just want to get the car back home a few miles to renew the rest of the brakes including caliper rebuilds. But they wouldn't entertain that I provide my own brand new pads (as I don't run garage provided rubbish) so would be a waste of my time too.

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                • #23
                  Try awesome gti over at Irlam if your anywhere near there , north bank ind est I think it was , vag specialists but Jim won't discriminate against other makes .

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                  • #24
                    £99 a disc, so think I'll put that idea in the bin! Kind of pointless unless you have some truely exotic discs to try and save. I'd have them skimmed off the car but last time I tried that it didn't seem to work for some reason, can only think it's because they're floating, but it works ok on the car it seems.

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                    • #25
                      £99 , wow , that's doubled in price since I got mine done , £200 for 4 but it was 4 years ago . I had the same problem skimming floating discs off the car , they looked ok but that's all , hence why I did the on car thing , that and the fact the fronts were the neck end of £400 to replace !

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                      • #26
                        I've got a set of single piece Pagid discs I'm putting on. These cost £99 the pair. I will see how these cope, my theory is they are half - if not nearly a third - of the price of genuine discs. If they last nearly as long (not long on my car due to the pads I use) without wobbling then they will be fine. I will just lose the nice aesthetic look of the alloy hub and pinned disc.

                        The frustrating thing is I can't get the ATE 2-piece at a decent price anymore, EuroCarpParts are wanting crazy money for them (£160 a disc atm).

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