Brakes permanently braking

[Fat_Board]

Hi. I found out thru a buddy of mine that my rear brakes as permanently braking. Hence why there are a lot of break dust on the rear wheels compared to the front wheels.

I changed the calipers and pads last weekend.

Does any of you have any good solutions on how to fix this?

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[Kett]

I don’t know whether this is relevant but I had a similar problem from ill-fitted (but correct) pads.

 

[Fat_Board]

I have rechecked the brake pads and they are installed correctly after following the guide, but they still stick.

I belive it could be the brake cylinder that is not working correctly.
I've read that it is possible to get a Citroen XM caliper, but I can't seem to find anyone for sale online. Do you know anyone that sells them?

 

[DaveL485]

Renault part numbers are bringing up nothing, had a quick look for Citroen XM ones but they don't look right to me.

 

[Kett]

Renault part numbers are bringing up nothing, had a quick look for Citroen XM ones but they don't look right to me.

I think it was the front XM callipers were same product as V6 rear.

 

[Ren5Clio]

Yes, correct. They are Citroen XM front calipers with 57mm diameter pistons from around 1993 - 2000 (the Citroen XM had the handbrake on the front !!). You can find new reconditioned ones on Ebay. The seal kits are no longer available from Renault but good quality pattern ones are available pretty cheap on Ebay. If you want to keep your original calipers the only correct way to solve the binding brakes is to completely strip, clean & rebuild the calipers. They get very gunked up & suffer from corrorsion inside the caliper cylinder in the area just above the main seal. Rebuiding them a reasonably straight forward job for a competent DIY mechanic.

 

[Dougieboy1]

I had exactly the same problem, rear wheels covered in brake dust and also getting hot on whilst driving, and i mean hot - you couldnt touch the nearside rear after an hour of driving.....

Had all the calipers remover, stripped and rebuilt, front and rear. The corrosion was so bad, the pad retainer pins had to be cut out.

No issue now and i try to avoid driving through puddles!

 

[Fat_Board]

I ended up buying a refurbished set from SG Motorsport. I think it cost me £120 per side. Everything is expensive here in Norway and I would not get a rebuild done any cheaper here.
My new problem is now that I have new pads as well, any they are too big.

These are Brembo pads, but I heard from SGM that I should rather go for some Red Stuff instead. Does anyone have any experience with Red Stuff compared to Brembo?

 

[DaveL485]

I ended up buying a refurbished set from SG Motorsport. I think it cost me £120 per side. Everything is expensive here in Norway and I would not get a rebuild done any cheaper here.
My new problem is now that I have new pads as well, any they are too big.

These are Brembo pads, but I heard from SGM that I should rather go for some Red Stuff instead. Does anyone have any experience with Red Stuff compared to Brembo?

Red stuff will be fine on the rear brakes. I have them on mine.

 

[Freddy6868]

hey guys i am looking into rebuilding the rear calipers on the vee. I'm on ebay now and there seams to be 2 different part numbers for what i think is the same rebuild kit. Any advice on where to get the rebuild kit from or what kit i need? Thanks

https://www.ebay.co.uk/itm/Brake-Calipe ... Swep1eSmXh

https://www.ebay.co.uk/itm/Brake-Calipe ... SwPXJcxwiM

 

[Freddy6868]

hey guys i am looking into rebuilding the rear calipers on the vee. I'm on ebay now and there seams to be 2 different part numbers for what i think is the same rebuild kit. Any advice on where to get the rebuild kit from or what kit i need? Thanks

https://www.ebay.co.uk/itm/Brake-Calipe ... Swep1eSmXh

https://www.ebay.co.uk/itm/Brake-Calipe ... SwPXJcxwiM

EDIT i think i have just found out, one listing seams to be pre 94 XM's and the other is post 94 xm's

 

[Szabotage]

I have looked into rebuilding the rear calipers too but because of the handbrake mechanism it is not easy. Most if not all of the kits you will find only address issues with the sliders or the piston. Please tell me if anyone has found a kit with parts for the handbrake? All I found is the dust cover and I dare say most cases that is not enough. Commonly the rear brakes hold the disc too much because of the handbrake mechanism and the consequence of this is a dragging wheel and heat. To mitigrate a dragging wheel you can consider loosening the handbrake but then the handbrake will not hold as strong when it is engaged for parking. The handbrake mechanism behind the piston goes out of whack, how do you rebuild it? It is important to fit brake pads with the pip facing the piston. This is for the handbrake. Not all brake pads have the pip that is to work with the piston.

 

[Szabotage]

I have looked at the links you mentioned and here are my comments. The pistons look empty, I may be wrong and I think it would be a good idea to clarify. Do they expect you to transfer the mechanism from your old piston? I wonder how successful a rebuild will be when using old parts which may be the reason you need a rebuild.

The more comprehensive kit appears to be the cheaper price because it includes the handbrake dust cover, but as I mentioned about in most cases this is not enough to rebuild the handbrake mechanism that this dust cover is protecting, and it also includes the dust cover for the bleeder valve. The more expensive kit does not have these two items. You only need to have the dust covers if yours are split or missing.

Both however lack the metal rings for the slider. You need 2 per caliper. As well as the slider. They are not expensive and should be replaced.

 

[Szabotage]

[v6plaque]5[/v6plaque] piston with internal components.
[v6plaque]6[/v6plaque] majority of sellers have this and depending on the extent of rebuild you are going for, this may not be enough.
[v6plaque]7[/v6plaque] parking brake thrust screw as well as retaining clips.
[v6plaque]8[/v6plaque] shims, locking pins, bleeder valve dust covers.
[v6plaque]9[/v6plaque] slider, metals rings, bush dust boots.

 

[Ren5Clio]

You can buy new pistons (57mm diameter) on Ebay from Big Red,

https://www.ebay.co.uk/itm/for-Citroen- ... 1531647209

they also sell the seal kits. New slide pins & their boots can be bought on Ebay (if not from Big Red). I rebuilt my calipers myself & unless you have some crazy water ingress & it's really rusted up badly in the handbrake cam lobe area (under the big boot) then that's all you really need to rebuild them. The handbrake cam lobe area is the trickiest part to put back together & you really need the use of a press to help with that as you have to press the cam lobe down while you tap in the operating arm. Another tip is to fit the piston in with brake fluid & not any kind of grease at all. Soaking the seals in brake fluid for a couple of hours before you fit them is also a good idea. AND.... clean everything up like a hospital before you touch the new seals or fit anything back together. Hope this helps :race:

 

[Ren5Clio]

P.S. the slide pin "DU" bushes can probably be bought from a good UK bearing supplier like "Bearing Traders"