turbomuz Member 209 Member For: 19y 8m 29d Location: Canberra Posted 24/03/06 06:49 AM Share Posted 24/03/06 06:49 AM Can anyone tell me what causes these marks on the brake rotor. Are the pads falling apart?Muz Link to comment Share on other sites More sharing options...
Turbo6man Lifetime Members 4,084 Member For: 22y 4m 1d Gender: Male Location: South Coast NSW Posted 24/03/06 06:58 AM Share Posted 24/03/06 06:58 AM No, the pads aren't falling apart. You've simply got no pads left. Those marks are typical of steel on steel. Link to comment Share on other sites More sharing options...
Ninka Donating Members 1,850 Member For: 22y 1m 18d Gender: Male Location: Perth, WA Posted 24/03/06 09:18 AM Share Posted 24/03/06 09:18 AM Looks like your rotors have been machined at some stage, correct?I think it looks like the rotors have been allowed to accumulate significant rust at some stage, and this is now flaking off resulting in this appearance.Only way out= machine again, or start using your brakes hard to wear this rust off Link to comment Share on other sites More sharing options...
Dagabond Bored Member Administrator 35,722 Member For: 22y 2m 28d Gender: Male Location: Dé·jà vu Posted 25/03/06 08:51 AM Share Posted 25/03/06 08:51 AM It look's like hot spot's or hard spots in the metal of the discs to me, which is causing the pad's to slightly skip the area and leaving the trailing mark's... Link to comment Share on other sites More sharing options...
THEMESHMAN260 Member 155 Member For: 21y 30d Posted 25/03/06 09:02 AM Share Posted 25/03/06 09:02 AM That is factory pore blowholes I see them every day in the scrap bin go back to dealerAnd replace not machine machining will only open it up Link to comment Share on other sites More sharing options...
kawerx TerriGhia Donating Members 206 Member For: 19y 20d Posted 25/03/06 10:53 AM Share Posted 25/03/06 10:53 AM It look's like hot spot's or hard spots in the metal of the discs to me, which is causing the pad's to slightly skip the area and leaving the trailing mark's... Link to comment Share on other sites More sharing options...
kawerx TerriGhia Donating Members 206 Member For: 19y 20d Posted 25/03/06 10:57 AM Share Posted 25/03/06 10:57 AM looks like hot spots.best to replace.ford only cover rotors up to 50000km.could try machining again.has anyone marked thier rotors to see if you get yours back when ford machine them?because they do so many they might rotate them with other cars to minimize time on the hoist. Link to comment Share on other sites More sharing options...
turbomuz Member 209 Member For: 19y 8m 29d Location: Canberra Posted 25/03/06 09:40 PM Author Share Posted 25/03/06 09:40 PM Thanks guys, this gives me something to put to the dealer. It was already going back to "resolve" a recurrance of brake shudder following machining and shims 2000km ago.Muz Link to comment Share on other sites More sharing options...
Trough Lolly Member 4,349 Member For: 20y 5m 3d Gender: Male Location: Mildura Posted 26/03/06 01:29 AM Share Posted 26/03/06 01:29 AM get some slotted DBA's or RDA's for the front. the stockers just arent worth bothering with even if it is a warranty job! or ask them if u can pay the difference between stockers to slotted. just an idea Link to comment Share on other sites More sharing options...
dattoman Member 67 Member For: 21y 7m 29d Location: Perth Western Australia Posted 26/03/06 09:03 AM Share Posted 26/03/06 09:03 AM Hard to say based on 2 pics and no actual infoPads may be leaching resin onto discDiscs may have been machined too many times and are thin........ so heat properties are lost (causing hot spots)May have picked up contaminants in the padAuto?.... sit on the brakes after hard stops..... allowing resin to deposit on the rotor ?Drive thru puddles or car wash? Water thru wheels onto hot disc is not a good thing. Link to comment Share on other sites More sharing options...
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