Discussion
I put my Peugeot 3008 in for MOT and I am told that all brake pads need changing as well as front discs as they have been damaged. when I told them that the brake pad warning light had not come on how could the discs been damaged. I was told that I still had 2mm on the pads and the warning lights would not come on. So I guess my question is with 2m left on the pads shouldn't the warning light come on. Also how can the discs be damaged when there is still 2mm left on the pads.
They wont be able to measure the pads fully accurately at an mot, and probably estimated the thickness of the most worn pad. That pad probably has no wear indicator on it, or is just about to reach it. Would you prefer they didnt advise you they were about worn out?
Discs can be damaged in many ways. Cracked, pitted (excessively), worn (unevenly), too thin oveall, or bits broken off.
You don't have to let them do the work, they are telling you it needs at least checking, if not sorting soon.
It is not an unusual need.
Discs can be damaged in many ways. Cracked, pitted (excessively), worn (unevenly), too thin oveall, or bits broken off.
You don't have to let them do the work, they are telling you it needs at least checking, if not sorting soon.
It is not an unusual need.
Coilspring said:
They wont be able to measure the pads fully accurately at an mot, and probably estimated the thickness of the most worn pad. That pad probably has no wear indicator on it, or is just about to reach it. Would you prefer they didnt advise you they were about worn out?
Discs can be damaged in many ways. Cracked, pitted (excessively), worn (unevenly), too thin oveall, or bits broken off.
You don't have to let them do the work, they are telling you it needs at least checking, if not sorting soon.
It is not an unusual need.
That ^^^Discs can be damaged in many ways. Cracked, pitted (excessively), worn (unevenly), too thin oveall, or bits broken off.
You don't have to let them do the work, they are telling you it needs at least checking, if not sorting soon.
It is not an unusual need.
You also don't generally have wear sensors on all calipers, let alone each pad. Usually you wave one wear sensor on the inner pad on one of the front wheels and the same on the diagonally opposed rear. It's entirely possible that a slightly sticky caliper has caused one of the 'sensorless' corners to wear faster and caused damage to the disc(s).
There isn't a brake pad warning light on a Peugeot 3008? I should know, I'm driving one with the left hand side being about 3mm thick brake pad and the drivers side being about to the bone basically. No brake warning light has come on in any case.
In terms of brake discs, they can be damaged IF (as far as I know) the actual bad wears to the bone and you basically get the backing pad contacting the brake disc. The backing pad of the brake pad is a different material to the raised area, as the backing pad is more or less solid steel. So steel on steel is going to cause damage.
If you're keeping the car then change the pads. If there's a definite lip on the disc then change those too, if not, just stick with changing the pads.
In terms of brake discs, they can be damaged IF (as far as I know) the actual bad wears to the bone and you basically get the backing pad contacting the brake disc. The backing pad of the brake pad is a different material to the raised area, as the backing pad is more or less solid steel. So steel on steel is going to cause damage.
If you're keeping the car then change the pads. If there's a definite lip on the disc then change those too, if not, just stick with changing the pads.
sgtBerbatov said:
If you're keeping the car then change the pads. If there's a definite lip on the disc then change those too, if not, just stick with changing the pads.
The discs can be damaged by things other than worn pads. If they need replacing them, replace them. If you don't know enough to judge for yourself and the MOT tester said they were damaged, it's safe to assume they need replacing. Discs are cheap in the scheme of things and if you're already replacing the pads then replacing the discs too takes almost no effort..Carguruguy said:
2mm is not alot at all it's enough to be an advisory on a MOT but not really bad enough to be a failure. Sounds like this garage is ripping you off.
Did they fail it, no mention of that, or just advise?If they are down to anywhere near 2mm they are overdue for replacement. Anybody contemplating, or advising it is ok to carry on without getting them checked is foolhardy, if not dangerous.
The garage sound pofessional to have pointed out a potentially dangerous item for it to be investigated. Yes, they may be looking for work, but you are not under any pessure to have them do any work.
phillpot said:
Modern discs are a consumable item, often need replacing even if pads have not work right down and caused scoring.
Brake discs have always been a consumable, surely? They might wear out faster now, but I doubt any cast iron discs were ever designed to last the expected life of the car. Dave Brand said:
Pad material is a contributory factor in the reduction in disc life. The fibres which are now used are more aggressive than asbestos.
Agree, brake discs as consumbable parts coincided with the removal of asbestos.Prior to that, going back to the pre 80's brake discs were rarely changed, in the lifetime of a car.
Coilspring said:
Dave Brand said:
Pad material is a contributory factor in the reduction in disc life. The fibres which are now used are more aggressive than asbestos.
Agree, brake discs as consumbable parts coincided with the removal of asbestos.Prior to that, going back to the pre 80's brake discs were rarely changed, in the lifetime of a car.
NotBenny said:
wasn't that because the would only last 5 minutes before rusting through and blowing its engine?
Pretty much what I was going to say. Nobody thinks twice if you mention your current car has 120k miles on it, but back in the early 80s they'd have burned you at the stake and killed your family. The first set of discs on my C Class were replaced at about 75k miles, together with the original pads.
And of course, all cars are heavier now, and brakes are far better!
Edited by Tony1963 on Wednesday 1st May 19:19
NotBenny said:
Coilspring said:
Dave Brand said:
Pad material is a contributory factor in the reduction in disc life. The fibres which are now used are more aggressive than asbestos.
Agree, brake discs as consumbable parts coincided with the removal of asbestos.Prior to that, going back to the pre 80's brake discs were rarely changed, in the lifetime of a car.
And I say thankfully in terms of health, not for the cost of replacements.
trickywoo said:
Any pictures?
Brakes are a soft touch for garages because of the safety angle.
If you are in doubt get a second opinion or better still get the wheels off yourself and have a look. Changing pads and even discs are still on the easy end of the scale for diy maintenance.
^^^^Brakes are a soft touch for garages because of the safety angle.
If you are in doubt get a second opinion or better still get the wheels off yourself and have a look. Changing pads and even discs are still on the easy end of the scale for diy maintenance.
This.
My brother-in-law just had his in for an MOT, got an advisory on pads and a quote for £220 to change them. He's got about 6 weeks before he changes his car so he asked me to take a look. Absolutely no way to see the thickness left on the pads without taking the wheel off and they were working fine so I couldn't see how they could advise they needed changed . He wasn't convinced (as he trusts the garage) and so I bought him some new pads and changed them for him. £40 later and less than an hour, we'd changed them only to find there was still around 5mm of 'meat' left on the worst of the pads. I thought that an MOT test for brakes was just a straightforward test of their efficiency and a visual inspection for faults. Don't see how they can legitimately give an advisory.
Gassing Station | Suspension, Brakes & Tyres | Top of Page | What's New | My Stuff