Xantia V6 front discs/pads advice needed

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Re: Xantia V6 front discs/pads advice needed

Post by RichardW » 25 Jun 2018, 12:14

The disc retaining screws are, unfortunately, made of cheese! T30 IIRC. Make sure to clean them out well, use a well fitting torx, and give them a good tapping before you try to undo, and whilst under torque if they are reluctant. I have always found that the corrosion holding them is on the taper flange rather then the thread, so once they are broken free, they unscrew easily. I don't recall any trouble getting the ones out on the OS. If necessary you have to drill the head off.... Sure I gave the impact drive back after we did the hub. You could probably get in with the impact driver, but we didn't have a 1/2" drive impact spec T55 bit so didn't try; just broke my 3/8" drive standard bit! As I recall the one in your tool box actually had a thicker shank and was up to the job. Never had any trouble with run out, just clean the hub face till shiny, apply a smear of copper slip and away you go.
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Re: Xantia V6 front discs/pads advice needed

Post by Mandrake » 25 Jun 2018, 12:18

So do you think I'd be best off buying a breaker bar (for some reason I still don't have one!) to use on one of my normal T55 socket drive bits (the one I think we used) or would a 1/2" impact spec T55 be a better choice ?

I could have sworn that you can't get the bulk of the impact driver in the wheel arch due to its size - didn't we try it on the bench after the hub was out ? I'm definitely not wanting to remove the hub from the car if it can be avoided so I'm leaning towards adding a breaker bar to my tool collection... 8-)
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Re: Xantia V6 front discs/pads advice needed

Post by Michel » 25 Jun 2018, 12:37

Mandrake wrote:
25 Jun 2018, 11:51

If more than one orientation is possible what do those of you without dial gauges do to check which orientation gives the least runout, or is that not a worry on modern discs ?


You must go and buy a dial gauge and check the runout. It's essential on a Xantia as the vibrations can damage the strut tops.

:rofl2:

That's really complete bullshit. I've never had a problem with runout on any cars discs I've changed, including 4 Xantias. Don't worry about it. Not an issue with modern discs. Just make sure the hub face is clean as usual.

Buy a breaker bar and a decent bit. You'll get the caliper bolts out easily enough.

You could also invest in one of those little old fashioned impact drivers - the ones like a fat screwdriver you hit with a hammer. One of those and a decent torx bit will undo the disc retaining screws with ease. Sadly, I can't think of another use for them in modern times :)
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Re: Xantia V6 front discs/pads advice needed

Post by Mandrake » 25 Jun 2018, 13:08

Michel wrote:
25 Jun 2018, 12:37
That's really complete bullshit. I've never had a problem with runout on any cars discs I've changed, including 4 Xantias. Don't worry about it. Not an issue with modern discs. Just make sure the hub face is clean as usual.
I only asked because when I posted about replacing my Ion front discs someone asked if I had measured the runout to find which orientation gave the least runout. :lol: Which I hadn't - I'd just put them on and not given it much thought.
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Re: Xantia V6 front discs/pads advice needed

Post by lexi » 27 Jun 2018, 21:43

With every trick and tool going, I had to drill out my front disc retaining screws last month on the C5. It is just your luck really. The wee dumpy manual impact driver can do the trick, but if they are stuck badly they chew up. I got new stainless screws quickly on Ebay.
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Re: Xantia V6 front discs/pads advice needed

Post by Mandrake » 28 Jun 2018, 08:59

Guess I'll see what happens! The brake parts have all arrived as promised this morning at least, good job as they were delivered to work and I'm not at work tomorrow. =D> When we did the wheel bearing and lower ball joint the right hand hub was completely out of the car so discs were removed as well as caliper carriers, so I think I'll be OK on that side, but the left hand side has a big question mark over it on both points.

At least I have two cars and can easily get by on a day to day basis with just the Ion as I do 90% of my driving in it anyway. The Xantia only really gets used for long distances and hauling stuff that requires more space from DIY stores or to the dump! :twisted:
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Re: Xantia V6 front discs/pads advice needed

Post by Mandrake » 30 Jun 2018, 16:11

Ok guys, help me out here...

The Bosch pads have wear wires supplied for both pads - but I've never seen a wire fitted to the outer pad on any Xantia V6 and I can't figure out how to route it! :lol:

The only way it seems to reach is as shown in the pictures below, however I'm not happy with that as it could get wedged under the caliper finger, or rub on the disc where it passes at the top, and there is enough slack that it may rub against the wheel as well.

So is there a trick to this, or does everyone just leave them out ? I'm going to leave the outer wire out for now but I'll keep it for future use if I can figure it out or someone can explain it to me...

BTW if anyone has been holding off buying some Xantia V6 discs/pads, these heavily discounted Bosch ones (discs only £15 each) are the real deal - normally priced at over £60 each. I guess there isn't much demand for Xantia brake parts now so they are getting rid of surplus stock, so if you have a Xantia V6 with old brakes that might need some in the next year or so, get in while they have them so cheap... :)
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Re: Xantia V6 front discs/pads advice needed

Post by lexi » 30 Jun 2018, 16:19

I have had that one before and IIRC just left them out. Our wheels are on and off enough to see when pads are wearing I suppose.
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Re: Xantia V6 front discs/pads advice needed

Post by bobins » 30 Jun 2018, 16:47

Not specific to Xantias - but I've previously routed them under the bleed nipple rubber covers or utilised the small metal clips that sometimes are fitted for the wires. If you're supplied with both inboard and outboard wires, then just fit the ones that route the best.
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Re: Xantia V6 front discs/pads advice needed

Post by bobins » 30 Jun 2018, 17:17

I think the wire(s) might be number 5 below:
xant brake wires.jpg
Xantia brake wires - PSA, fair use
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Re: Xantia V6 front discs/pads advice needed

Post by xantia_v6 » 30 Jun 2018, 17:29

As shown above, they go downwards, and through a loop/hole in the casting, then around under the cylinder, through the loop of the bleed nipple cap, then through a sleeve with the inner wear indicator cable and up to the connector.
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Re: Xantia V6 front discs/pads advice needed

Post by Mandrake » 01 Jul 2018, 08:39

xantia_v6 wrote:
30 Jun 2018, 17:29
As shown above, they go downwards, and through a loop/hole in the casting, then around under the cylinder, through the loop of the bleed nipple cap, then through a sleeve with the inner wear indicator cable and up to the connector.

Are you sure the above image is for the 283mm version of the brakes ? On my old 2.0i with smaller brakes the pad wires did indeed both loop through the bleed nipple cap, however the inner pad wire definitely does not reach the bleed nipple cap on this. The wire is too short and even if it was longer it would lead an awkward sharp route.

Also the only hole in the casting at the bottom the wire might go through is in the part that flips up - which means the wire would have to be disconnected at the pad end to flip up the caliper, which doesn't seem right. Also once it passes through the hole there is nothing to support it on the other side so that it doesn't get snarled up.

I'm pretty sure the pad wire routing is different for the smaller and large version Xantia brakes.

Anyway, I've left the outer pad wire off - the original pads weren't fitted with one anyway.
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Re: Xantia V6 front discs/pads advice needed

Post by Hell Razor5543 » 01 Jul 2018, 08:50

I would suggest that (at that price you paid) you lay in a supply of those pads, enough for a couple of brake pad changes in the future.
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Re: Xantia V6 front discs/pads advice needed

Post by Mandrake » 01 Jul 2018, 08:59

Hell Razor5543 wrote:
01 Jul 2018, 08:50
I would suggest that (at that price you paid) you lay in a supply of those pads, enough for a couple of brake pad changes in the future.

At about 2k miles a year in a 21 year old car I think this set of discs and pads will outlast the car! :lol: It will be too old and rusty to stay on the road by the time the pads need replacing again...
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Re: Xantia V6 front discs/pads advice needed

Post by bobins » 01 Jul 2018, 09:58

The diagram I posted was for a V6 Xantia. It was the only one I could find no matter how I configured the Xantia - it's a generic picture :( The parts diagram shows a routing for the wires, but I don't know if that makes it relevant.
xant brake wires b.jpg
Xantia brake wires b - PSA, fair use.
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