Is this unevenness typical for the UK/Europe, too?
I was a bit unimpressed with how much variance some pairs had. On the lighter side, the rears lasted over 70,000km.
Xantia Brake Pad Wear
Moderator: RichardW
- Old-Guy
- Posts: 1798
- Joined: 11 Sep 2008, 12:08
- Location: Gloucestershire
- My Cars: 2011 Grand C4 Picasso VTR+ 1.6HDi in Kyanos Blue
1995 Xantia Estate SX 1.9TD in Vert Vega "The Green Lady" - now owned by XanTom
1998 Xantia 2.1 VXD Estate in Mauritius Blue - R.I.P. (terminal tin-worm) - x 17
Uneven wear is pretty normal in my experience, but when it's bad, it's a sign that either a pad has been 'hanging up' or that the caliper is sliding smoothly on it's guide pins.
When changing the pads, make sure that the calipers slide smoothly and more particularly make sure that the seats for the pads in the calipers are clean, smooth and free of rust. Put a faint smear of copper grease on the seats. If the pad with the piston behind it, can't slide smoothly, then the other pad does most of the work, particularly under gentle barking. Then when you brake really hard, the stuck pad moves, and binds until enough friction material has worn away. The process repeats endlessly.
One of your rear pads looks as though you may have the familiar corrosion-between -rear-caliper-and-suspension-arm problem.
When changing the pads, make sure that the calipers slide smoothly and more particularly make sure that the seats for the pads in the calipers are clean, smooth and free of rust. Put a faint smear of copper grease on the seats. If the pad with the piston behind it, can't slide smoothly, then the other pad does most of the work, particularly under gentle barking. Then when you brake really hard, the stuck pad moves, and binds until enough friction material has worn away. The process repeats endlessly.
One of your rear pads looks as though you may have the familiar corrosion-between -rear-caliper-and-suspension-arm problem.
2011 Grand C4 Picasso VTR+ 1.6HDi in Kyanos Blue
1995 Xantia Estate SX 1.9TD in Vert Vega "The Green Lady" - after 11 years now owned by XanTom
1998 Xantia 2.1 VXD Estate in Mauritius Blue - R.I.P. (terminal tin-worm)
1995 Xantia Estate SX 1.9TD in Vert Vega "The Green Lady" - after 11 years now owned by XanTom
1998 Xantia 2.1 VXD Estate in Mauritius Blue - R.I.P. (terminal tin-worm)
-
- Sara Watson's Stalker
- Posts: 7098
- Joined: 19 Aug 2008, 12:38
- Location: NEW South Wales, Australia. I'll show you "Far, far away" ;-)
- My Cars: Peugeot 605
Citroën Berlingo
Alfa 147 - x 93
OK, that nearside rear outboard pad is obviously the one where you suspect corrosion. It looked fine at the interface; there was certainly no visible oxidisation or parting of the two elements. I've just got "tide me over" pads running on the car until the brakes are properly sorted.
For the front outers to wear more than inners, does it suggest the self-adjusters aren't up to scratch? The OSF one was very hard to wind in, but then again the NSF wore most unevenly and that was easy to retract!
Cheers, Adam.
For the front outers to wear more than inners, does it suggest the self-adjusters aren't up to scratch? The OSF one was very hard to wind in, but then again the NSF wore most unevenly and that was easy to retract!
Cheers, Adam.
- Old-Guy
- Posts: 1798
- Joined: 11 Sep 2008, 12:08
- Location: Gloucestershire
- My Cars: 2011 Grand C4 Picasso VTR+ 1.6HDi in Kyanos Blue
1995 Xantia Estate SX 1.9TD in Vert Vega "The Green Lady" - now owned by XanTom
1998 Xantia 2.1 VXD Estate in Mauritius Blue - R.I.P. (terminal tin-worm) - x 17
Front inners wearing more than outers is a sure sign of sticking calipers. But the other way round? IMHO it seems more likely to be the outer faces of the discs getting more rusty than the more protected inner faces. Leave the car outside, overnight rain and the following morning, nice shiny discs have rusty brown marks on them. Rust is surprisingly abrasive.
Isn't winter in NSW the 'wet season'?
Can't see that it's anything to do with the self-adjusters as they simply take up the free-play to minimise lag in response and more particularly to keep the hand-brake working.
Isn't winter in NSW the 'wet season'?
Can't see that it's anything to do with the self-adjusters as they simply take up the free-play to minimise lag in response and more particularly to keep the hand-brake working.
2011 Grand C4 Picasso VTR+ 1.6HDi in Kyanos Blue
1995 Xantia Estate SX 1.9TD in Vert Vega "The Green Lady" - after 11 years now owned by XanTom
1998 Xantia 2.1 VXD Estate in Mauritius Blue - R.I.P. (terminal tin-worm)
1995 Xantia Estate SX 1.9TD in Vert Vega "The Green Lady" - after 11 years now owned by XanTom
1998 Xantia 2.1 VXD Estate in Mauritius Blue - R.I.P. (terminal tin-worm)
- falling-out-with-my-car
- Posts: 1928
- Joined: 06 Apr 2008, 15:26
- Location: Northamptonshire
- My Cars: Citroen C5 Aircross 8 speed Automatic, Flair Model with far to many toys and nice comfy armchair like leather seats. ha ha Ive just had a conversation with the car. setting everything up verbally
- x 24
I get uneven wear about every three sets of new front pads on my xantia estate, I think it often has something to do with the make up of the pad and how hard/soft they may be.
I drive my car without passengers quite a bit and the pads wear more on the drivers side of the car sometimes, other times they can wear more on the passenger side.
probably more to do with how they are made and the materials they are made with.
regards Nigel.
I drive my car without passengers quite a bit and the pads wear more on the drivers side of the car sometimes, other times they can wear more on the passenger side.
probably more to do with how they are made and the materials they are made with.
regards Nigel.
Citroen Xantia S2 1.9 TD estate 189K soon to be broken for parts Jan 2017 headlamps & radiator fan assembly already spoken for & A 1987 Citroen 2CV6 special just for fun.
New addition Citroen C5 2.0 HDi Exclusive Hatch purchased 09/12/2016 with 83K on the clock.
New addition Citroen C5 2.0 HDi Exclusive Hatch purchased 09/12/2016 with 83K on the clock.
i my experiance i find that type of wear on the front's is down to the either the slide's seizing/sticking, or the pad stuck in it's seat,
that rear one is definatly the usual corosion build up between calliper and rear arm, no doubt about it,
if all the callipers are working/moveing as they are ment to, what the car is carrying has nothing to do with front pad wear, but the more weight you have in the back of the car will just wear the rear's down a bit quicker than with no extra weight, you certainly should not get uneven wear,
regards malcolm
that rear one is definatly the usual corosion build up between calliper and rear arm, no doubt about it,
if all the callipers are working/moveing as they are ment to, what the car is carrying has nothing to do with front pad wear, but the more weight you have in the back of the car will just wear the rear's down a bit quicker than with no extra weight, you certainly should not get uneven wear,
regards malcolm
-
- Sara Watson's Stalker
- Posts: 7098
- Joined: 19 Aug 2008, 12:38
- Location: NEW South Wales, Australia. I'll show you "Far, far away" ;-)
- My Cars: Peugeot 605
Citroën Berlingo
Alfa 147 - x 93
Good to see some more input on this one. The rear corrosion will be easy to fix with Wurth copper grease on mating faces.
Front calipers I may kit and reassemble while Malc sorts out what I need for the bigger fronts (CJ should be beatifying him for patience with me).
Much as anything, we have a good set of reference photos here in case anyone else starts talking about brake wear on a Xantia...
Front calipers I may kit and reassemble while Malc sorts out what I need for the bigger fronts (CJ should be beatifying him for patience with me).
Much as anything, we have a good set of reference photos here in case anyone else starts talking about brake wear on a Xantia...