Xantia rear brake pads - looking bad
Moderator: RichardW
-
- Posts: 4809
- Joined: 11 Jun 2007, 16:17
- Location: Christchurch, Dorset. UK
- My Cars: 2005 C5restyle 1.6HDI 16v 110hp VTR Estate
2008 C5 X7 1.6HDI VTR+ Saloon - x 231
Xantia rear brake pads - looking bad
I thought I'd change my brake pads and started at the rear only to find they've worn unevenly and actually have a pronounced lip on the top.
If you compare the new pads, the old ones appear to be too long, hence the lip that hasn't been worn.
As for the angled wear, I would naturally assume it's down to the infamous caliper corrosion but before I embark on fixing that, can anyone confirm that is indeed the problem and the surfaces I need to derust are as indicated by the tip of my screwdriver?
I know it's been covered before and I'll make a search if need be but feel free to add any gotcha's or pointers I need to watch for.
If you compare the new pads, the old ones appear to be too long, hence the lip that hasn't been worn.
As for the angled wear, I would naturally assume it's down to the infamous caliper corrosion but before I embark on fixing that, can anyone confirm that is indeed the problem and the surfaces I need to derust are as indicated by the tip of my screwdriver?
I know it's been covered before and I'll make a search if need be but feel free to add any gotcha's or pointers I need to watch for.
- Xaccers
- Posts: 7654
- Joined: 07 Feb 2007, 23:46
- Location: Milling around Milton Keynes
- My Cars:
- x 184
The angled wear is indeed down to the corrosion pushing the caliper out at an angle.
Remove calipers, some people have had the bolts snap, I haven't on either Dex or Cassy, but I don't think replacement ones are that expensive so if you'd have no way of getting to a dealer if they do snap then buy a set before you start.
I used a cold chisel and a wire brush to clean up the backs of my calipers, then some grease between them and the arm to reduce the rebuild up of corrosion.
Remove calipers, some people have had the bolts snap, I haven't on either Dex or Cassy, but I don't think replacement ones are that expensive so if you'd have no way of getting to a dealer if they do snap then buy a set before you start.
I used a cold chisel and a wire brush to clean up the backs of my calipers, then some grease between them and the arm to reduce the rebuild up of corrosion.
1.9TD+ SX Xantia Estate (Cassy) running on 100% veg
1.9TD SX Xantia Hatchback (Jenny) running on 100% veg for sale
Laguna II 2.0dCi Privilege (Monty)
DIY sphere tool
1.9TD SX Xantia Hatchback (Jenny) running on 100% veg for sale
Laguna II 2.0dCi Privilege (Monty)
DIY sphere tool
- 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
From the photo, it looks to me as though the old pads are for larger diameter discs, but the new ones seem to be nearer the right size.
A hatchback Xantia should have 224 x 9 discs. Could it be that it has these discs but calipers for the larger size?
A hatchback Xantia should have 224 x 9 discs. Could it be that it has these discs but calipers for the larger size?
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)
-
- Posts: 4809
- Joined: 11 Jun 2007, 16:17
- Location: Christchurch, Dorset. UK
- My Cars: 2005 C5restyle 1.6HDI 16v 110hp VTR Estate
2008 C5 X7 1.6HDI VTR+ Saloon - x 231
I've got the bolts out ok - using a half turn out, quarter turn in method but the brake feed pipe doesn't want to come out
I'm with you Old-Guy, the old pads are too large for the discs. I'll measure the discs to make sure they're the right size. The inner disc surface has a bad groove worn into it too so might need to change them at some point - not this year though.
I'm with you Old-Guy, the old pads are too large for the discs. I'll measure the discs to make sure they're the right size. The inner disc surface has a bad groove worn into it too so might need to change them at some point - not this year though.
- VertVega
- Posts: 1178
- Joined: 01 Nov 2008, 19:39
- Location: Province nordique de l'Union européenne
- My Cars:
- x 13
I also had this unusually carved rear brake pads! Never before and never after, I'm sure it was a production mistake.
I used the same pads one more season, by filing away the top "lips"
White corrosion is a known issue and it needs to be cleaned.
As Xac said, after cleaning, apply some grease (copper or aluminum paste is also fine) on both surfaces (1 and 2).
I used the same pads one more season, by filing away the top "lips"
White corrosion is a known issue and it needs to be cleaned.
As Xac said, after cleaning, apply some grease (copper or aluminum paste is also fine) on both surfaces (1 and 2).
C5 II 2.0i 16V - 2005 - Estate - 103KW - EW10A - Petrol - Manual
-
Onlinemyglaren
- Forum Admin Team
- Posts: 25454
- Joined: 02 Mar 2008, 13:30
- Location: Washington
- My Cars: Mazda 6
Ooops.
Previously:
2009 Honda Civic :(
C5, C5, Xantia, BX, GS, Visa.
R4, R11TXE, R14, R30TX - x 4917
Have you soaked them in Plus-Gas Mike?MikeT wrote:I've got the bolts out ok - using a half turn out, quarter turn in method but the brake feed pipe doesn't want to come out
I'm with you Old-Guy, the old pads are too large for the discs. I'll measure the discs to make sure they're the right size. The inner disc surface has a bad groove worn into it too so might need to change them at some point - not this year though.
-
- (Donor 2021)
- Posts: 307
- Joined: 13 Jul 2010, 08:59
- Location: chelmsford, essex.
- My Cars: 1982 GSA 1299
1984 bx 1600
zx 5 door x 2
xantia estate
dispatch
xara picasso
806
807 SE - x 4
I did my rear brakes amonst other things before I went on a recent trip to liverpool.how bizzare that they corrode this way.
My calipers came off quite easily and all cleaned up nicely,had to put a new disc on, as one side was completly knackered,had "one" in the boot when I got the car yes only "one".tried to get hold of another "one" but they are only sold in pairs (as you would expect).Wonder how the muppet I got the car from got hold of only "one".Anyway I would only replace as a pair but was desperate and it was on the back.
The real reason to reply was to give this link. http://cgi.ebay.co.uk/ws/eBayISAPI.dll? ... K:MEWAX:IT
Very cheap and I wish this had been available when I did my brakes.
please dont slate me off for being cheap but can these items be that bad
My calipers came off quite easily and all cleaned up nicely,had to put a new disc on, as one side was completly knackered,had "one" in the boot when I got the car yes only "one".tried to get hold of another "one" but they are only sold in pairs (as you would expect).Wonder how the muppet I got the car from got hold of only "one".Anyway I would only replace as a pair but was desperate and it was on the back.
The real reason to reply was to give this link. http://cgi.ebay.co.uk/ws/eBayISAPI.dll? ... K:MEWAX:IT
Very cheap and I wish this had been available when I did my brakes.
please dont slate me off for being cheap but can these items be that bad
- NewcastleFalcon
- Posts: 24709
- Joined: 25 Feb 2009, 10:40
- Location:
- My Cars:
- x 6881
You may find my experience useful. Eventually it was all sorted but three of the 4 caliper bolts snapped, and the stubs had to be removed from the radius arm by welding on a nut to each in turn.
Xantia rear brake caliper bolts removal
regards
Neil
Xantia rear brake caliper bolts removal
regards
Neil
-
- (Donor 2021)
- Posts: 307
- Joined: 13 Jul 2010, 08:59
- Location: chelmsford, essex.
- My Cars: 1982 GSA 1299
1984 bx 1600
zx 5 door x 2
xantia estate
dispatch
xara picasso
806
807 SE - x 4
it does seem vcheap but an email and a couple of questions to the seller to find out brand and avaiability might reveal all.At those prices it would be cheap enough to replace all pads and discs every couple of years.citronut wrote:the price of those disc's and pads is abit to cheap for my likeing, £60 quid all inclusive four disc's and two sets of pads and carridge,
-
- Posts: 4809
- Joined: 11 Jun 2007, 16:17
- Location: Christchurch, Dorset. UK
- My Cars: 2005 C5restyle 1.6HDI 16v 110hp VTR Estate
2008 C5 X7 1.6HDI VTR+ Saloon - x 231
I got the brake pipe out with brute force after learning there's piece of rubber hose inside used as a seal. I was just being too delicate with it. Toby kindly fetched me new seals from the stealer bringing back four for a fiver.
Mr Haynes says there should be an anti-rattle spring and two pad shims per caliper - is this correct for the MK2 as mine are absent from the N/S caliper and rain stopped play before I could play with the O/S caliper?
After pondering the deep groove on the inner face of the disc, I can only assume the previous pad (it seems the inner wears quicker) had been allowed to get to bare metal but whoever changed them, just fitted new, oversize pads sans shims and spring?
I also want to question the wisdom of using copperslip where corrosion occurs between two dissimilar metals? Would a tri-metal meet be even worse?
Mr Haynes says there should be an anti-rattle spring and two pad shims per caliper - is this correct for the MK2 as mine are absent from the N/S caliper and rain stopped play before I could play with the O/S caliper?
After pondering the deep groove on the inner face of the disc, I can only assume the previous pad (it seems the inner wears quicker) had been allowed to get to bare metal but whoever changed them, just fitted new, oversize pads sans shims and spring?
I also want to question the wisdom of using copperslip where corrosion occurs between two dissimilar metals? Would a tri-metal meet be even worse?
- 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
I have to agree with you, Mike. Being higher up the galvanic scale copper should make matters worse by increasing the galvanic voltage.
I know it's common practice to use copper-slip between rear caliper and suspension arm. The thinking is that it's designed to resist high temperatures - the flaw in this is that the copper is designed to remain as a low-movement, high-load, lubricant when brakes get so hot that the grease boils off.
In practice, it probably works OK in temperate climates because Xantia rear brakes rarely work hard enough (except when towing?) for the calipers to get at all hot. Any HMP grease would do to make the surfaces water-proof - probably just any grease.
When I come to do mine - still on the same pads after 3½ years and 33,000 miles (quite possibly the factory originals!) - I intend to paint the swinging arm surface with at least 2 coats of black heat-proof (wood-burner) paint.
The real cure would be to have the calipers anodised - but that's a bit OTT.
I know it's common practice to use copper-slip between rear caliper and suspension arm. The thinking is that it's designed to resist high temperatures - the flaw in this is that the copper is designed to remain as a low-movement, high-load, lubricant when brakes get so hot that the grease boils off.
In practice, it probably works OK in temperate climates because Xantia rear brakes rarely work hard enough (except when towing?) for the calipers to get at all hot. Any HMP grease would do to make the surfaces water-proof - probably just any grease.
When I come to do mine - still on the same pads after 3½ years and 33,000 miles (quite possibly the factory originals!) - I intend to paint the swinging arm surface with at least 2 coats of black heat-proof (wood-burner) paint.
The real cure would be to have the calipers anodised - but that's a bit OTT.
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)