Xantia front brake anomaly

[yannbeam]

Hi chaps.

I decided to change the front brakes on the TD today as its due an MOT soon and I,ve had the parts here since the last MOT ! When I got the wheel off and looked at the discs something seemed odd. The disc looked bigger than they should The car should have the standard 266mm discs but is currently wearing the larger 283mm discs. The caliper is the smaller one (with the 54mm piston) and the new correct genuine citroen pads fit perfectly in the carrier.

If I put the smaller discs on the pads dont come to the edge of the disc ! With the larger disc on the inner break pad doesny quite cover the whole of the disc. So has someone been playing mix and match with my front brakes ? Anyone else had this on their car ? The brakes have always worked well. Now I,m just confused.

[elma]

I've heard of Xantias having different brakes fitted to whats expected but never seen it myself. First thing I'd do would be to check service citroen to see what should be fitted. I think rule of thumb is 266mm on Hatchbacks, 283mm on estates and 288mm on V6 or Activa but I'm sure I've seen it reported that some hatches have 283mm from the factory for no apparent reason.

Sounds like maybe you have the 283mm carrier and discs with the 266mm callipers which suggests someone upgraded but failed to change the callipers. If so then swap the callipers for 283mm or swap the carrier and use 266mm. From my own experience with both I don't think 283mm is really necessary on a Td hatch so I'd go with whichever came up first at a reasonable price if it were mine.

[electronmirror]

Front 288mm discs are also used on HDI 110 Xantias.

Not come across this sort of disparity personally but I do remember an apocryphal tale reported many years ago of a Morris Marina which came off the production line with a disc brake on one wheel and a drum on the other

[ekjdm14]

Hope I don't run into this on our Xantia when I do the brakes!

[CitroJim]

It may well have been an 'upgrade' at some point in the life of the car..

My Activa is soon to receive V6/HDi 288mm discs and calipers which will then make that one non-standard...

[superloopy]

What size calipers are on the S2 activa?

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[CitroJim]

What size calipers are on the S2 activa?

Very late (V reg. Onward IIRC) S2 Activas do have the 288mm discs/calipers Mike but all S1 and early S2 Activas have the smaller discs/calipers as fitted to the 1.9TD...

[superloopy]

So ... its 283 in between?

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[CitroJim]

So ... its 283 in between?

Yes, as far as I know...

[Old-Guy]

I'd guess that when the discs were last changed, either the wrong discs were supplied (and the 'fitter' didn't notice or care) or the larger discs were deliberately fitted for some reason. I can't believe that the original discs have lasted for 19 years!

[CitroJim]

I can't believe that the original discs have lasted for 19 years!

That would be something of a record