http://www.meganesport.net/community/showthread.php?59385-How-To-Refurb-Brembo-Caliper-Seals

sounds like something sticking to me mate

 

Yer just looked, looks like the pads have worn unevenly, good shout!

Seals are prob shot, refurb is my best bet

Anyone know what i can do you stop the brake fluid when i take the calipers off? (bearing in mind they will prob be off for a good week or so!)

 

if you buy the kit mentioned in my thread they come with a bleed nipple cover that fits perfect where you take the hoses of the car you can buy pistons too if needed from the same place.

 

Yer id do that myself but now the osf one is basically purple they need repainting so i might aswell get an entire overhaul

Cheers though

 

Cam buy the kits yourself and do them, simple job.

Popping the piston out wasn't a good idea then at! who said patience was a virtue.

 

If they've got hot enough to blue the caliper I'd be looking at replacing that one tbh.

 

Update:

Im no mechanic and cant remember exactly was i was told but went into renault today

Was told the piston/pad was sticking and had fried the piston seals, ruining the caliper, pad and warping the disc.

Nearside caliper was okay but im not risking it so 2 new calipers, new discs, new pads and new fluid all bought... Expensive day!

 

Ouch bet that stung a bit!

Tight fit of the pads to the caliper so very easy for them to stick if they get gummed up.

 

Starting to get a little annoyed now

Fitted new discs, pads, calipers and fluid. Obviously brakes are going to be pretty poor first few hundred miles but thats not my concern.

After a subtle drive tonight i got out to have a nosy, i felt the osf caliper (original one that overheated) and that was too hot to touch after 5secs wheras the nearside one was just 'hot' and i could leave my finger on it.

Is there a way the nsf brakes are working less than the osf overloading the osf? Even though ive replaced everything?

Cheers

 

have you had a new caliper matt?

 

Is it something silly like a bubble in the fluid? What order are you bleeding them?

 

i (stupidly) assumed i only needed to bleed the front calipers as i hadnt touched the rear. going to re-bleed them all at the weekend hopefully!

have you had a new caliper matt?

yer new calipers, discs, pads and fluid

 

Right, the osf caliper is noticably hotter than the left after a drive.

All internet info points to a grabbing pad, possible causes:

Piston sticking - causing pad to get stuck against disk causing hit build up
Pins not sliding correct - causing pads to get stuck

Or

What i think

Hoses - hydraulic pressure build up meaning the piston cant return causing pad to grab on disc.

Coincedentally the osf caliper (hottest one) was the one ive just fried and about 1 month before i fried it on track, i fitted goodridge braided lines.

Is it plausible for me to say the goodridge osf line could be faulty/incorrect diameter causing this pressure buildup?

How do i know thats the cause if it is? Shall i go back to standard lines? Do i contact goodridge with my issue?

Cheers

 

What I would do mate is put car on axle stands. Start car, get someone to press the brake pedal. Then let go of the brake. See if you can turn the wheel or disc by hand. If its tight open the bleed nipple and see if the disc gets easier to turn. If it does its pressure build up. You could also try this by opening the the connection where it joins the brake pipe to brake hose. This would determine whether it is a faulty hose or caliper. (Fords uses to have problems with hoses collapsing inside causing the same symptoms as you describe. Usually after some heavy braking)
If it doesn't get any easier to turn the disc then your pads are stuck in the sliders. That's simple to check, just try taking them out like when you replaced them.

I hope this makes sense to you?? It is early in the morning writing this. Let us know how you get on

 

Really appreciate that mate, makes sense.

Will hopefully give it a go tomorrow if the weather holds out!

 

Try as above, very odd one this.

 

As above really. or go back to standard lines. not read it all but you didn't let it run dry did you

 

Nope well flushed thru too.

 

i think you may have a hose problem. i would put the standard hoses back on, as long as the fluid didnt run dry then you should be ok. as when that happens clip needs to be put on and brakes bleed via the computer.

 

im going through the same issue at the moment osf front calliper has got so hot is destroyed the seals however the wheel still spins fairly freely and the pads move easily on the pins and inside the calliper itself! never had this before so i guess its down to the pistons not retracting

 

Same here mate, im pretty sure its my goodridge hoses, are you running braided lines?

My calipers were spot on for a good 5 trackdays then i did braided lines, next trackday the osf one had gone purple and all the seals fried!

 

I'm going to service both callipers and keep them as spare's! its a good enough excuse to upgrade Alcon's are the way forward

 

sounds like you know the cause to me mate. and it does seem strange that it's happened like that like lemon says can you swap the old ones over?

 

Yup thats the next thing, luckily i kept the std hoses!

Gona do them one night this week weather dependent and ill report back any change.

To me there is no other excuse, if done calipers, discs, pads and fluid and bled every bubble i can out and still the same so to me, the hose (im guessing here) is probably faulty or slightly too small causing it to hold pressure and not release the pistons back

Fingers crossed as i dont want to fund this again!

 

Interesting!

 

but if im been honest its not the hoses as ive never had a problem before and they have been fitted for some time! i guess its just wear and tear on the calliper!

 

dale yours is like you say probably down to wear and tear on a 'used' car but Matt something's obviously happend since you changed the hoses so an obvious place to start. let's hope it is just the line then maybe you can get some pennies back from it all too?

 

im guessing he uses his car on track, they do get a lot of heat etc may have been unlucky and had a faulty/weak seal