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Thread ID: 65593	2006-01-23 21:39:00	car brake disks.....	drcspy (146)	PC World Chat

Post ID	Timestamp	Content	User
423673	2006-01-23 21:39:00	got the disk pads replaced and the disks machined a couple of months ago ...noticed a slight judder in the front a month ago approx got the garage to look at em today they tell me I now need new disks cause apparently if the disks are a bit stuffed then a 'skim' wont fix that........this is a honda integra 95 what's the story assuming theres enuf meat on the disk why wont a machine which 'turns' the disk and parralels the surfaces stop a 'judder' ?....... anyone ?	drcspy (146)
423674	2006-01-23 21:53:00	the disk can can a soft spot, this will wareout faster then the other parts of the dsik, theis results in a "judder". if you skim the disk it will fix the problem for a short time only, the soft spot is still there and the "judder" will return. soft spots can result for overheating your breaks.	robsonde (120)
423675	2006-01-23 23:59:00	"soft spots can result for overheating your breaks." I take it you mean from ??? hm......dont recall doin that ........the cars a 95 model the missus bought it in 2001 and the disks shouln'dt be 'thin' so that cant be an issue........hm.......oh well bugger there goes another couple of hundred dollars......grrrrr	drcspy (146)
423676	2006-01-24 00:03:00	I'd seriously doubt that the disks are too thin to be practically machined 'more' cause the missus bought it in 2001 and it was only jsut over 5 years old then ...probably at that point had never had a skim......and I've only had it done recently .....the interesting thing is that this seems to only haev happened AFTER i got the pads replaced and disks skimmed recently......interesting about 'soft spots' tho.......could be the issue I guess...	drcspy (146)
423677	2006-01-24 00:08:00	did they check wheel alinement? mud on wheels? that will also casue judder under brakes. also are the pads worn in? some takes ages to wear in under normall driving. not uncomman with some cars to have to change the disks at the same time they change the pads. useing overhard pads causes disks to wear more. also size of brakes and style of driveing play a part to.	tweak'e (69)
423678	2006-01-24 00:12:00	alignment is good......no mud lol.....pads shold be worn in i do a lot of milage...and this never happened before they changed teh pads and skimmed the disks......anyway i've given em the go ahead to get new disks and install em........if after that job the car is still got the same symptom they may be whistling in the wind for payment lol........we'll see in about a weeks time when it's done	drcspy (146)
423679	2006-01-24 00:13:00	did the mechanic wear the pads in or did you?	tweak'e (69)
423680	2006-01-24 00:25:00	got the disk pads replaced and the disks machined a couple of months ago ... Who machined them? Is it the same place that now says you need new disks? If so, at the very least you are entitled to a refund of the money you paid for the machining as the "service" provided did not produce the desired results i.e. good brakes. I'd get a second opinion from a Honda dealer regarding the initial machining and the advice that the disks need replacing. You may have been "had". Cheers Billy 8-{)	Billy T (70)
423681	2006-01-24 00:42:00	Could well be due to bad machining. Try and get hold of a magnetic base and a dial gauge, check runout. It should ideally not be more than about 0.05mm. www.popularmechanics.com www.brakeinfo.com	Terry Porritt (14)
423682	2006-01-24 02:34:00	got the disk pads replaced and the disks machined a couple of months ago . . . noticed a slight judder in the front a month ago approx got the garage to look at em today they tell me I now need new disks cause apparently if the disks are a bit stuffed then a 'skim' wont fix that . . . . . . . . this is a honda integra 95 what's the story assuming theres enuf meat on the disk why wont a machine which 'turns' the disk and parralels the surfaces stop a 'judder' ? . . . . . . . anyone ? Here comes the retired mechanic . . . but you just KNEW I'd pipe up . . . right? OK . . . Disc brake rotors are supposed to run parrallel to the bearings and therefor the hub upon which they are mounted . That translates to: no runout beyond factory stated specs . When one has a "brake job" at a shop, they like to machine the rotors to make them flat and remove any runout that might have happened because the owner/operator ignored the noises and wore the pads to less thickness than the metal plate upon which they are mounted . This causes excess heat to build up and after a hot stop from 100 mph (sorry NZ), when one sits at the stoplight for a few moments with a foot on the brake pedal, the rotor distorts a little and doesn't run true any more . The next series of stops and brake use can cause this situation to get worse and then the driver feels the shimmy and shake at the steering wheel . After doing a front end alignment and replacing a lot of expensive parts that weren't the cause, the driver then goes to a shop and gets the rotors machined . . . but this time they are a little thinner and more susceptable to warpage . It become a cycle of "they warp-so-cut-off-some-more-metal" and they are junk . Realistically, many newer cars have a "No machining" rule any more to eliminate this complaint . Since the unsuspended mass of the rotors and relative brake hardware is what gives "road feel" to the vehicle, and the designers trying to remove any of that to make the owner happy, the rotors are very thin or hollow or composite to lower unsuspended mass and resulting road shock . These rotors must not be machined, but they need to be replaced if they get too far outta specs . If you have had a "brake job" by a shop . . . then you can be pretty sure they machined the rotors . . . they don't want you to come back in 20 miles (again, sorry NZ) and complain about the bad job they did . That's just the way to shift the responsibility to you and off their shoulders . CYOA = cover your own a$$; a motto by which to live another day .	SurferJoe46 (51)
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