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D2 - Axles, Brakes, Suspension and Steering Brakes, Springs, shocks, steering racks, steering columns, suspension arms, wheel hubs etc. |
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#1
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disc skimming
suffering from a vibration when the brakes have warmed up I am considering having the front discs skimmed on car as they look rather tatty rather than worn , so don't want to fit new pads on them
haven't yet got a quote for this but I presume it is cheaper and easier than a couple of new discs at £100 plus anyone done this ? ps to conan ...have you go 2 dictionaries in your library , one of which says axle and the other axel ...or are you an ice skater ? |
#2
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Yep, I had that done two or three years ago and it cured a long-running problem with juddering brakes.
I kept getting discs and pads replaced, but after around 1500 miles (IIRC) the juddering would come back, until the on-car skimming cured the problem.
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2002 Final Edition S8. Ebony black with Silver Grey leather and myrtle wood trim. Current mods: solar sun roof, 20mm rear spacers, 15 mm on front, red brembo callipers, 6k headlights, rear view camera, engine remap, alloy dash dial rings, alloy navi rings, tt/phaeton pedal upgrade, (and custom matching foot rest) dension ipod interface & parrot hands free kit (both fully hidden), av input, tv in motion switched thro' PF switch in blanking plug right of steering column, Audi 'quattro' sill covers, repositioned centre console switches, radio clock, .Planned mods: auto-dimming rear view mirror, dash cam (as steamship's), fit the ski hatch, refit philips drl's (or maybe not - nope, definitely not - horrible botch!). |
#3
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I've had it done a couple of times (at about £50 per wheel, if I recall correctly). The juddering went away but only temporarily. Came back each time after 1000-2000 miles.
The third time the judder came back, I had the calipers inspected and had the discs and pads changed again, this time insisting on genuine OEM (the previous set were supposed to be genuine, but we couldn't be certain). Also, I decided to (attempt to) properly bed the brakes in this time, though through a lack of suitable safe brake bedding-in locations I may not have done it as thoroughly as a should. After probably 4000 miles or so some judder has returned but so far it's only very slight. I think I may be causing the problem myself somewhat by holding the brakes on while stationary following some spirited driving/braking. Traffic conditions allowing, I usually try to stay off the brake pedal or keep the car rolling a little while the discs are still hot but of course that's not always practical/possible to do.
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Mark ------------------------------------------------------ 2002 FE S8 Ebony Black Pearl ------------------------------------------------------ ------------------------------------------------------ Cars Owned: The Tesla Era: 2020 Model S Performance Ludicrous+ (present) (Black, with all black premium interior and carbon fibre décor, 21" sonic carbon twin turbine wheels and FSD capability) The Audi Era: '97 A8 4.2 (Ming Blue) --> '96 A8 4.2 QS (Dark Green) --> '02 FE S8 (present) The Citroen Era: '84 BX 1.6 RS --> '89 BX 1.9 DTR Turbo --> '94 XM 2.0L Turbo --> '96 XM 2.0L Turbo Exclusive --> '00 Xantia Activa 2.0L Turbo The Banger Era: '76 1.2L Lada VAZ-2101 (Ruski Fiat 124) --> '80 1.7L Morris Ital HL, finished in Ermine White and Rust |
#4
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thanks jim , will give it a go then once I have checked the discs are well above the minimum thickness which I believe is 28mm
looking at the service records the car had new jurid discs and pads fitted about 30 k ago , the pads are only about half worn ! what did the skimming cost ? any memory ? I seem to remember that you do a fair mileage so sounds economic if it has already done 2/3 years |
#5
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I can't remember the cost - I'll see if I can find a receipt
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2002 Final Edition S8. Ebony black with Silver Grey leather and myrtle wood trim. Current mods: solar sun roof, 20mm rear spacers, 15 mm on front, red brembo callipers, 6k headlights, rear view camera, engine remap, alloy dash dial rings, alloy navi rings, tt/phaeton pedal upgrade, (and custom matching foot rest) dension ipod interface & parrot hands free kit (both fully hidden), av input, tv in motion switched thro' PF switch in blanking plug right of steering column, Audi 'quattro' sill covers, repositioned centre console switches, radio clock, .Planned mods: auto-dimming rear view mirror, dash cam (as steamship's), fit the ski hatch, refit philips drl's (or maybe not - nope, definitely not - horrible botch!). |
#6
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thanks mark as well , you clearly posted as I was answering jim and I didn't see it
strange the difference between your experience and jim's ; have read elsewhere that this is a problem on big powerful cars I wonder if your idea about keeping your foot on the brake could be the reason , must try slipping it into park when stopping even briefly , mine lurches a bit when I~ do that , always presumed that was normal just like on my landie on the transmission brake I suppose using the handbrake would be a good idea but it isn't exactly convenient ! Last edited by oldnick; 20th September 2016 at 01:52 PM. |
#7
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Quote:
I guess it's not helped that our cars are automatic so there is a tendency to stop with the footbrake on, other than putting it in park or neutral (with handbrake on) there probably isn't much else to do.
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Cars... '93 Audi Coupe 2.0 Alpine White (sold) '99 Audi S4 Merlin Purple - K04 upgrade to 412hp (sold) '00 Audi S8 Agate Grey (Sold ) '11 Audi Q7 4.2tdi Unknown Red (Classic Red Pearl Effect - thanks MJ) |
#8
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Quote:
Getting out of the habit of holding it on the foot brake, especially when the discs are hot, is the key I think, but sooner or later you're likely to do it again simply because you forgot or it was just unavoidable. I have often wondered if uprated/vented discs might help.
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Mark ------------------------------------------------------ 2002 FE S8 Ebony Black Pearl ------------------------------------------------------ ------------------------------------------------------ Cars Owned: The Tesla Era: 2020 Model S Performance Ludicrous+ (present) (Black, with all black premium interior and carbon fibre décor, 21" sonic carbon twin turbine wheels and FSD capability) The Audi Era: '97 A8 4.2 (Ming Blue) --> '96 A8 4.2 QS (Dark Green) --> '02 FE S8 (present) The Citroen Era: '84 BX 1.6 RS --> '89 BX 1.9 DTR Turbo --> '94 XM 2.0L Turbo --> '96 XM 2.0L Turbo Exclusive --> '00 Xantia Activa 2.0L Turbo The Banger Era: '76 1.2L Lada VAZ-2101 (Ruski Fiat 124) --> '80 1.7L Morris Ital HL, finished in Ermine White and Rust |
#9
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Quote:
Its force of habit now to knock it in to neutral and pop the handbrake on since I always did that before the S8 anyway. I could get the discs glowing on my A6 on the twisty bits so it was a frequent problem until I learned the solution, and also to not park up while the pads were still smoking Skimming would solve the problem too of course since it would take away the contaminated surface, but 0-60-0 is cheaper and more fun |
#10
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Interesting. So you're saying that repeating the bedding-in procedure should actually fix judder caused by uneven brake pad deposits?
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Mark ------------------------------------------------------ 2002 FE S8 Ebony Black Pearl ------------------------------------------------------ ------------------------------------------------------ Cars Owned: The Tesla Era: 2020 Model S Performance Ludicrous+ (present) (Black, with all black premium interior and carbon fibre décor, 21" sonic carbon twin turbine wheels and FSD capability) The Audi Era: '97 A8 4.2 (Ming Blue) --> '96 A8 4.2 QS (Dark Green) --> '02 FE S8 (present) The Citroen Era: '84 BX 1.6 RS --> '89 BX 1.9 DTR Turbo --> '94 XM 2.0L Turbo --> '96 XM 2.0L Turbo Exclusive --> '00 Xantia Activa 2.0L Turbo The Banger Era: '76 1.2L Lada VAZ-2101 (Ruski Fiat 124) --> '80 1.7L Morris Ital HL, finished in Ermine White and Rust |
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