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Post by kermit999 on May 11, 2012 8:17:27 GMT
Hi, I'm hoping for some expert opinions please.
I've just bought a '09 plate Vauxhall Insignia from a certain UK-wide company (not Vauxhall however). There was a fault showing which the seller couldn't diagnose so they asked me to take the car to the local Vauxhall place to get them to look at it. Whilst sorting the problem they ran a healthcheck on the car, and found that the front discs are 60% work and both rear tyres are distorted, although the tread depth is ok.
According to Direct.gov the car was MOT'd in early March this year, since then it's done less than 1500 miles - so my questions are a) should it have passed in the first place (ie is it plausible for the discs to wear that much in a month) and b) is the dealership at fault for selling the car in such a condition? Would it pass an MOT now, with 60% worn discs?
Hope you guys can help, thanks.
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Post by baz657 on May 11, 2012 10:32:45 GMT
The condition and amout of wear of brake discs (and pads for that matter) don't come into the MOT test, unless they are so badly worn that they are almost paper thin! If the brake performance (on the brake rollers or on a road test) meets the minimum requirements for that particular vehicle, the condition of the discs and pads are not taken into account - although most testers would add an advisory note regarding their condition.
Without looking at the discs, it sounds like a case of the discs would have passed then and now but with a note about the amount of wear.
It has to be remembered that the MOT test looks for minimum requirements - several componants (including brake discs) could pass the test when they are well past their service limits. MOT limits and service limits are not the same. MOT limits and standards are far lower than service limits and standards.
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Post by markd65 on May 11, 2012 18:48:12 GMT
Id would tend to agree with Baz however id argue the point does the car have steel wheels and covers? if so you cant fail what you cant see but if you have alloys most you can see the disc and pads . You can do a visual and physical check (sec 3.5 mechanical brake components) but as a tester you have to determine if the discs are so badly weakened or insecure as to fail and with the pads being only 1.5mm thick minimum id pass and advise otherwise. Again id agree we are looking for the minimum requirements to pass the test as well as the rbt showing imbalance (fronts only) wish they would include rears on that.
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nitros44
Nominated Tester
esto es un negocio serio
Posts: 741
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Post by nitros44 on May 11, 2012 20:53:22 GMT
BAZ has answered the post and it might be worth mentioning that the 60% figure stated might possibly be an over exaggerated estimate to try and encouraged trade ;D
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Daveg
NT & VTS Council member
I believe I am perfect, but others may differ in opinion?
Posts: 1,549
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Post by Daveg on May 11, 2012 21:41:27 GMT
Would it pass an MOT now, with 60% worn discs? What they told you there was a load of tripe I Don't know the exact model of your car because you didn't post it, so assuming the brake discs when new were 27mm thick, then; 60/100 x 27 = 16.20 Therefore in the time you advise the brake discs have worn thin by 10.8 mm, roughly 1.1cm My Audi has brake discs all round and I fitted them some six years ago and have covered about 50,000 miles. I ain't changed them yet and they are not wafer thin either Dave
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phaetonott
Nominated Tester
I may not be right but at least I am trying!
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Post by phaetonott on May 12, 2012 21:58:47 GMT
Ahhh Dave if your hypothetical discs start at 27mm, and have stamped on them "min thickness 25mm" a 60% worn disc would have 0.6 mm worn off each side. Hardly drastic, not even worth an advise, but a scaremongering salesman might be able to earn a bit of bonus just but quoting 60% worn
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kjb
Full Member
Posts: 59
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Post by kjb on May 13, 2012 9:15:59 GMT
Insignia vented discs start off @ 30mm thick when new,must have had some brilliant eyesight or gone to the trouble of measuring to assume they are 60% worn,I tend to believe it was scaremongering & the guy was on bonus!
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Daveg
NT & VTS Council member
I believe I am perfect, but others may differ in opinion?
Posts: 1,549
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Post by Daveg on May 13, 2012 9:58:34 GMT
Ahhh Dave if your hypothetical discs start at 27mm, and have stamped on them "min thickness 25mm" a 60% worn disc would have 0.6 mm worn off each side. Hardly drastic, not even worth an advise, but a scaremongering salesman might be able to earn a bit of bonus just but quoting 60% worn The problems I see is that we don't actually know the worn thickness of the discs? My assumption of a new disc at 27mm is quoted by Vauxhall for that model, but also may be a different specification depending on other factors like engine size, power output, diesel, petrol etc? Another poster has said in his opinion that Vauxhall quote a figure of 30mm? Given that the original poster has not replied and that no picture of the worn discs has been posted, we are all assuming what if's really But however one cuts it, 60% worn is a lot when someone puts information across to you in that fashion. There was obviously something to hide originally as the technician could have just said your discs are worn by as much as 6mm, and they are ready for renewal etc? Dave
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