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clio 182, no brake response



Hi everyone, my boss asked me today to fit some brembo discs, ferodo pads and braidied lines to her boyfriends clio sport 182. Everything came off fine and went on well, bled the brakes as usual replacing the fluid with dot 5.1. The problem was that when i tried to test the brakes there was no resistance in the pedal. ie no pressure in the fluid as the pistons wouldn't come out either? As a result had to leave the car at our warehouse overnight anybody got any ideas as to what the problem could be as i need to sort it out by tomorrow morning :S
 
yeah i kept pumping the brakes during the bleeding process and before i tested the brakes, definately no pressure in the brake fluid building up:(
 
  CB600FS
Are you just cracking the nipples off, and pumping away?

No bleed bottle, or locking them off when you let the pedal up?
 
im not locking the nipple off before i lift the pedal up..maybe thats the problem, i used a tube with oil in to ensure air didnt go back in the nipple tho..(thanks a lot for your help so far by the way..)
 
Why use 5.1 its usless it needs chnaging way to offten its for race cars.

Sounds like you'v got air into the stystem get a 1 person easy bleed setup that is easy to use cannot go wrong.
 
  172 cup'd extreme
Why use 5.1 its usless it needs chnaging way to offten its for race cars.

Sounds like you'v got air into the stystem get a 1 person easy bleed setup that is easy to use cannot go wrong.

Edde your thinking of silcone based dot 5. Dot 5.1 is compatable with 3 and 4
 
Why use 5.1 its usless it needs chnaging way to offten its for race cars.

Sounds like you'v got air into the stystem get a 1 person easy bleed setup that is easy to use cannot go wrong.

Edde your thinking of silcone based dot 5. Dot 5.1 is compatable with 3 and 4

Sorry yep its compatable but does go hydroscopic thats what I was refering to.
 
Managed to blead the brakes to a certain extent.. the front n/s and rear o/s bled without too much hassle, the travel of the brake pedal was normal and enough fluid was being pumped out to clear the air as well and the brakes were effective afterwards. When bleeding the other two brakes i came across some problems. The brake pedal action wasn't right and there was only resistance at the end of the stroke, there was also much less fluid being pumped out compared to other two as well as no air. After bleeding about half a litre of fluid there was still no air and the brake action wasnt right as well as the brakes them selves not actually working (no movement from the piston). After speaking to a few renault people someone suggested that there may be air in the abs unit and this was causing the weird brake travel and lack of fluid leaving the nipple and that this could be flushed by charging the abs unit (trying to lock up the brakes). However i couldnt do this because when all the nipples were tightened again none of the brakes appeared to work. End result was driving it to the renault dealer down the road using the handbrake. Im hoping that the brake fluid just needs to be drained differently as one guy i spoke to said the ways mentioned above of bleeding the fluid are wrong and that a vacuum needs to be used in order to prevent any air entering what so ever!! Anyway thanks for your help guys and ill post up what actually went wrong when i find out!
 
Oh, almost forgot to say that when fitting the new pads and discs there seem to be a problem as there wasnt enough clearance between pad and disc for the wheel to rotate effectively. I spoke to the supplier who assured me everything was oem spec (brembo discs and ferrodo pads) and that their shouldnt be a problem. I measured the discs width and the disc appeared to be 0.5mm thicker than its supposed t be, could this cause the problem? also the pads didnt fit in the carriers when the original shims were in place, i took them down to the renault dealership and he said the wrong pads had been ordered but thar i could sand/grind a little away from the pads or carriers in order for the pads to fit in and not be too tight. After doing this and the brakes still not working i contacted the supplier who said the shims needed to be removed and this could be causing the problem :( Anyways after 2 days working on the car and no results i was very annoyed and it currently is sitting in the dealers garage..
 
After bleeding about half a litre of fluid there was still no air and the brake action wasnt right as well as the brakes them selves not actually working (no movement from the piston). After speaking to a few renault people someone suggested that there may be air in the abs unit and this was causing the weird brake travel and lack of fluid leaving the nipple and that this could be flushed by charging the abs unit (trying to lock up the brakes). However i couldnt do this because when all the nipples were tightened again none of the brakes appeared to work. End result was driving it to the renault dealer down the road using the handbrake. one guy i spoke to said the ways mentioned above of bleeding the fluid are wrong and that a vacuum needs to be used in order to prevent any air entering what so ever
Renault can use there computer to altomaticaly get the ABS syetm to bleed itself as Renault techies told you the ABS system sounds like its run dry its a bugger to fix yourself the easy fix is to activate the abs system this bleed the system then bleed the brakes again then actiavte the abs system as you saw its difficult to do hency why Re ault computer cna get the abs system to actiavte itself whilst they just open the nipples. Plus theyhave there easier to use pressue system not the single person setup which arn't ideal.

No need to use a vacume though.
Oh, almost forgot to say that when fitting the new pads and discs there seem to be a problem as there wasnt enough clearance between pad and disc for the wheel to rotate effectively. I spoke to the supplier who assured me everything was oem spec (brembo discs and ferrodo pads) and that their shouldnt be a problem. I measured the discs width and the disc appeared to be 0.5mm thicker than its supposed t be, could this cause the problem? also the pads didnt fit in the carriers when the original shims were in place, i took them down to the renault dealership and he said the wrong pads had been ordered but thar i could sand/grind a little away from the pads or carriers in order for the pads to fit in and not be too tight. After doing this and the brakes still not working i contacted the supplier who said the shims needed to be removed and this could be causing the problem :( Anyways after 2 days working on the car and no results i was very annoyed and it currently is sitting in the dealers garage..

Half a mm thicker err thats way to thick did you use the figures posted in this thread for size a disk which was that much to mad would be a serious problem.
http://www.cliosport.net/forum/showthread.php?t=133902

Shims should stay in place with stock stuff only uprated copy cat etc parts need sometimes a bit of filling and removal of the shims to make them fit. Sounds like you don't have true OE replacment stuff. DS stuff doens't fit perfectly like original high spec Renault standard stuff.
 
  Lionel Richie
parts were supplied by us, i've spoken to harry over the phone, and i'm baffled as to whats happened!!! it sounds as if air has got into the abs pump or something along those lines, it also sounds like there's a possible knackered caliper (common on 182's infact!)

harry if you could send me over all of the part numbers and i'll double check everything you have is correct

i will also measure some of our discs on the shelf to check their thickness
 
R

rich[182]

edde - money aside, is it best to get full bleed inc the ABS stuff done by the dealer ?
also what fluid is best suited, assuming 5.1 is overkill
thanks
 
  RenaultSport clio 172 mk2
Edde your thinking of silcone based dot 5. Dot 5.1 is compatable with 3 and 4

Sorry yep its compatable but does go hydroscopic thats what I was refering to.


That's "hygroscopic". An affinity for absorbing water from the air.

A hydropscope is a device for viewing things under water. "Hydroscopic" would be adjective of that. If there was one. But there isn't.

Im sure edde knows what he means LOL
 
Last edited:

Gaz_

ClioSport Club Member
  Extreme mode
DS2500 pads require the shims to be removed

f**k me. Had a set fitted to mine at the weekend, had to grind some off the side of the pad as the caliper wouldn't fit over them to bolt up!!!. Shocking for the price of them. The tollerence on them is way out! The brakes even binded slightly when fitted, due to how much compound is fitted to each pad :eek:
 
  Lionel Richie
na they're fine, you just need to remove the shims and make sure the pistons are all the way in

remember aftermarket manufactures (ferodo etc) basically draw round an OE pad with a pencil (not joking) to get the pad backplate shape, that explains the slight over size, but its fine if you remove the shims
 

Gaz_

ClioSport Club Member
  Extreme mode
Shims were removed. On my old cup we had to remove about 2mm off each end as they wouldnt fit even without the shims. With these new ones i had fitted to my 182 at the weekend they fit fine untill it was time to bolt up the caliper housing. Piston wound fully back, be we couldn't get the housing to line up with the two bolts. Had to grind some off the side where the spring and rivet sits!!! This was the only way it would have fit!!!! Savage but all sorted now!
 
  BMW M3
lol.... those damn ds2500. All i had was a pesky file that looked more suited to working with nails.... what a fag it was. lol

Worth it though :)
 

Gaz_

ClioSport Club Member
  Extreme mode
Ave it! fred loves the grinder too ;)

Typically on arches......
 
yeah i had the angle grinder out on the pads for a little reshaping, made them fit as well as the previous oem ones though. I also thought the pads seemed very thick and was contributing to the brakes binding, ill soon find out, the renault dealer is having a look tomorrow.
 
  Mondeo TDCI 130
they were mega thick fred! like you can only just get the caliper shut! and i do mean just! thought they were going to bind when hot, but so far they seem ok!
 
rich[182];2838611 said:
edde - money aside, is it best to get full bleed inc the ABS stuff done by the dealer ?
also what fluid is best suited, assuming 5.1 is overkill
thanks
YTRying to bleed the ABS yourself a pain hence why getting Renault is the worthwhile option.

5.1 as I said absorbes water quickly its a race fluid stick with dot 4. My personaly recomendation is Castrol super dot 4 response.
That's "hygroscopic". An affinity for absorbing water from the air.

A hydropscope is a device for viewing things under water. "Hydroscopic" would be adjective of that. If there was one. But there isn't.

Im sure edde knows what he means LOL
Ye I was going to write absorbes water but tried to sound techie I cannot spell for toffee.
Had a set fitted to mine at the weekend, had to grind some off the side of the pad as the caliper wouldn't fit over them to bolt up!!!. Shocking for the price of them. The tollerence on them is way out!
I totally agree I've yet to find a decient aftermarket pad.

remember aftermarket manufactures (ferodo etc) basically draw round an OE pad with a pencil (not joking) to get the pad backplate shape, that explains the slight over size, but its fine if you remove the shims
Thats not acceptable IMO.
 
  CB600FS
remember aftermarket manufactures (ferodo etc) basically draw round an OE pad with a pencil (not joking) to get the pad backplate shape, that explains the slight over size, but its fine if you remove the shims

Is that genuine? Thats quite bad for the price people pay. Could understand if it was just the paint run over where they sit in the carriers needed removing.
 
  Lionel Richie
well i know thats how certain manufactures do it, it may not be the case with all of them

the back plates i assume are laser cut or stamped (i maybe wrong) and that isn't exactly bollock on accurate especially if the outline is coming from a tracing
 
Got the car back from the garage today! Problem with the brakes was sorted. The front n/s piston was slightly stuck from where'd i g clamped it back to get the new pads in and just needed a bit of persuation. As for the bleeding it seemed just leaving the car for a while solved the problem as the garage was able to bleed it fine 3 days after i brought it in. No news on the binding brakes though as they didnt get round to trying the new pads out.
 


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