Gti-6 Caliper Rebuild...

[fatony1 17]

My calipers are stripped bare, no piston/seals/bleed nipples etc, my question is are they ok to send for sand blasting in this state, or should I plug the nipple/brake hose holes and plug/mask up the inner part where the piston lives? How do caliper refurb company's do it?

 

Thanks in advance

[Tom Fenton 1,542]

You need to block up as you mention. The surface that the piston seal runs on needs to be smooth. If you sandblast it, it will leak forever more. Also block off the threaded parts as blasting will ruin the threads.

[chipstick 382 1 Cars]

Yeah mask them up.

 

Better off Soda Blasting than Sand which doesn't risk the grit being hidden in places you don't want it.

 

I can get them Soda blasted if you wanted.

[welshpug 1,657]

I'd leave the piston+seal in place, and wind a blanked union into the brake hose port, also leave the slider pins fitted.

[Tom Fenton 1,542]

When I did mine, I actually left them complete with the chopped off rubber brake hose. I soaked them in Bilt Hamber De-Ox-C solution, took a few days but cleaned them up to looking like new castings. I then painted them and they look as good now as when I did them.

[fatony1 17]

Would they be ok to soak in that stuff without seals/pistons etc? Where did you get it from?

[Tom Fenton 1,542]

Try this link-

 

http://lmgtfy.com/?q=bilt+hamber

[fatony1 17]

Cheers mate. Does it only remove rust on bare metal or will it loosen up/remove old paint/grime/dirt etc?

[Tom Fenton 1,542]

This is a pic of the caliper carrier after being in the de-ox-c

 

 

As you can see they come up really well.

[BlueBolt 156]

Been looking through ebay for new rubbers and bits for refurb'ing a set of these, I stupidly (and rather humorously) search "metal stripper" in eBay to find something to stip them with to clean them up though hahahahaha... Just thought I'd share that whilst posting

 

Anyway... Is there anyone on the forum that does the rubbers and seals I will need?? Or is this ideal for the job??

fatony1:: What seal set did you get?? How did you get on with it in the end??

[allye 530 3 Cars]

The big red kit is the tits! I rebuilt my 1.9 calipers with a set really good quality. And if you rebuild them well its essentially a new set of calipers for £25.

[BlueBolt 156]

Excellent!! I'll be doing my research on what exactly I'm doing then and getting that set!!

 

Thanks Ali

[cybernck 402 1 Cars]

Unlike rear caliper rebuild kits, this is basically just a seals kit (it doesn't contain new pistons), so it wouldn't really make for brand new calipers .

[BlueBolt 156]

Unlike rear caliper rebuild kits, this is basically just a seals kit (it doesn't contain new pistons), so it wouldn't really make for brand new calipers .

 

So for a rebuild then I'd need something like this or this then??

 

Want to make the best job of these calipers that I can...!!

[cybernck 402 1 Cars]

Not really, as GTi-6 calipers have 57 mm pistons.

 

No need to change them if there's no damage to them anyway .

[welshpug 1,657]

rear caliper rebuild kits dont include the pistons.

 

http://www.ebay.co.uk/itm/Peugeot-205-GTi-Brake-Caliper-repair-kit-rear-203005-/270920656715?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item3f1421274b

[BlueBolt 156]

No need to change them if there's no damage to them anyway .

 

How would you get piston damage?? just out of interest??

 

rear caliper rebuild kits dont include the pistons.

 

http://www.ebay.co.u...=item3f1421274b

 

Blimey!! There's a few more seals and bits for the rears!!! Worth doing though if I'm doing the front so I'll add that into my list....!!

Edited February 24, 2012 by BlueBolt

[welshpug 1,657]

you tend to get piston damage when the outer dust boot is knackered, and the brake fluid isnt changed often enough, both lead to corrosion on the pistons.

[BlueBolt 156]

That's kewl, I'll look out for that when I pull them apart...

[cybernck 402 1 Cars]

rear caliper rebuild kits dont include the pistons.

 

http://www.ebay.co.uk/itm/Peugeot-205-GTi-Brake-Caliper-repair-kit-rear-203005-/270920656715?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item3f1421274b

 

These do, but with a trade-off of having less seals

 

http://www.ebay.co.uk/itm/REAR-CALIPER-BRAKE-PISTON-REPAIR-KIT-PEUGEOT-205-/370509095543?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item5644102277

 

 

you tend to get piston damage when the outer dust boot is knackered, and the brake fluid isnt changed often enough, both lead to corrosion on the pistons.

 

And what if the calipers were out of use for many years?

[welshpug 1,657]

These do, but with a trade-off of having less seals

 

http://www.ebay.co.u...=item5644102277

 

And what if the calipers were out of use for many years?

 

they aren't "pistons" they're the slider pins.

 

 

out of use but still on the car? still likely to happen.

[cybernck 402 1 Cars]

Oops, it says "slide pistons" there, which got me confused.

 

I thought the shape was a bit strange mind.

 

 

Off the car, but judging by the pile-of-rust condition the discs are in, I'm not too sure of the calipers either.

[BlueBolt 156]

Can anyone tell me what bleed nipples I should avoid getting and what ones I should be looking for?? There are a lot on the bay, most of them are M10 but don't want to be getting the wrong thing...

 

(null)

[BlueBolt 156]

Looking on here for info on how I go about getting the pistons out of the calipers with them off the car, I stumbled upon this which gives me the impression that I need to either use my brakes to pop them out, or an air compressor...

As I have no air compressor, and I was kind of hoping for a magic answer but never going to find it, I thought I'd double check that I'm not imagining things and I'm right about having to make a massive mess and let them pop out??

 

I know the brake fluid is like acid to any paint work, but thats a bonus as I want to be cleaning them up anyway, just going to have to make sure that I don't get any on the main car itself lol

[allye 530 3 Cars]

I was going to say air line, the fire out don't lever them out or anything as you'll damage the pistons. You may be able to hook up some sort of foot pump arrangement?