TylerDurden

Are the track rods maybe bent slightly to cause these symptoms?

Thanks

matt-c

iTrader: (5)

I'm booked in at a garage with Pro Cut on Saturday week, will report back with findings.

kenc

iTrader: (6)

Would too hard of a compound pad cause this??
Also have you any way of putting back on the oem set up, that way you will have a definite yes or know to the brakes?

matt-c

iTrader: (5)

I do still have the OEM disks, it's an option.

When i take the car, i will also take all the disks i have, must be able to sort something out.

kenc

iTrader: (6)

I would defo try back on the standard disks at least, id try pads aswell to rulethem out once and for all

Godspeed Brakes

iTrader: (259)

I would not recommend you having the new 2 piece discs you had from me skimmed on the car , the discs are running true you had from me , I work in very tight tolerances making these , if they are not running true on the car then your hubs are slightly out , by skimming the discs on the car , you are truing the discs up to suit the car , which is not fixing the problem.

Also if you machine the discs in anyway it will invalidate the warranty , I would get the hubs checked for run-out with a DTi gauge to check them out , at least you can see what's what.

The marks on your discs you are referring to in your pictures , will go blue with hard use , which will clean off with some normal driving and is not something that is out of the ordinary

If you want the discs checked out for peace of mind , I can do that for you , if there is a fault on the discs it will be covered under our 12 month guarantee and any fault would be rectified

Hope this helps

Cheers Ian

matt-c

iTrader: (5)

Thanks Ian, i did say in my recent mail to you that I'm confident the disks are fine as supplied, just need to find a way for them to work with my car.

matt-c

iTrader: (5)

Garage visit was not overly useful, verdict was near side front disk warped.

But that diagnosis was made based on variable braking force seen on that wheel, where the others all have consistent braking force.

So I think it's narrowed down to the near side front, but not really any further on.

Any suggestions?

TylerDurden

Sorry to hear that, its really bloody infuriating problem, I will be going to the garage to have the ball joints, track rods inspected, although im not hopefull it will show something but its worth a try, Ill report back too.

ps are there any bushes or anything that could cause this?

TylerDurden

Also, I dont get any judder under 40mph, its all above this, all the way down to 40mph, just wondering if this is of any significance?

scoobygaz1

iTrader: (3)

Hi i`ve got the same problem new brake lines and fluid new discs and bluestuff pads bedded in carefully 700 miles when i brake fairly hard steering wheel wobbles from side to side

dan2926

iTrader: (4)

Did you change the brakes because of the juddering problem to start with and its still there. Most ive came across with this problem have turned out to be damaged calipers.

scoobygaz1

iTrader: (3)

No the pads needed replacing and decided to upgrade the disc`s at the same time. Brakes were ok before just not very good

matt-c

iTrader: (5)

For info, mine started to be an issue after a pad change also.

I thought it was pad material build up problem, however disks change did not remedy.

TylerDurden

well had everything checked out again today, including the track rods, still no further think . ALthough they are saying that 3 of my alloys have a slight warp. I will try some new disks, and see what happens, will be gutted if it still happens.

matt-c

iTrader: (5)

Mine have now become very noisy, sort of droning noise, bit like when a bearing goes, but only when braking so can't be a bearing? Unless bearing are under more load when braking or something ??

It's borderline to drive it now, did 250 miles this weekend, but losing confidence for a high speed stop due to the noise, also a bit like if the pads were completely worn, but the pads are new, the disks are new ........ HELP.

TylerDurden

Same here mate, does the judder get worse as the brakes get hotter? As thats what happens on mine, but the judder is getting worse day by day, dash is vibrating badly.

I did notice it started to happen after I slowed down from 120 to 70 3 or 4 times.

But I cant decide if I should go for now discs and pads, or save up for a new set of alloys and see if that causes it.

Might go to kwick fit and get them to put the wheels on the balancing machine, to double check if the wheels are buckled.

Although I did have a turbo 2000 before this which had a buckled wheel but no brake judder.

matt-c

iTrader: (5)

Yes, gets worse as they get hotter.

New disks and pads did not help for me, nor did getting the wheels balanced.

TylerDurden

on this m5 forum, people are saying it could be worn control bushes http://www.m5board.com/vbulletin/e39...der-worse.html

suppose its worth checking out.

grahamc

iTrader: (10)

my car is off to TFS on Friday to try and get the brakes sorted (among other things) will report back what happens.

JamesMWRX

This thread is all too familiar and what is described is exactly what plagued my 2002 Bugeye WRX for 2 years and completely drove me up the wall. The car is not an everyday runner, just a toy.

It all started when I rattled the car hard off a kerb when I slid wide in the snow. Didn’t break anything, and all felt fine. After about 1000 miles of so, I started getting a judder under braking. Knowing the brakes were well worn, I changed the pads and discs. Bedded them in over about 500 miles or so and then after 1000 miles, the judder came back, getting progressively worse as the miles went on.

Every set of brake discs I put on it, it ended up with the front drivers side warping after 1000 miles of gentle driving.

I did the following and every time, the problem came back:

Changed the discs and pads (four times), changed the callipers with a set of Brembos, new hoses, fluid etc. Ensured the hub was scrubbed as much a possible. Had the discs machined on the car, judder wouldn’t go away. Put a brand new hub flange and bearing on it, new tyres, had the wheels rebalanced, swapped the wheels around and had the geometry done. The problem came back after 1000 miles every time.

No one could find anything wrong with the car. I am not heavy on the brakes and the car is on standard power. They got run in properly. I tried a few hard stops to see if that cleared any deposits off the discs but makes no difference. The old hub had no significant runout not did the new hub at any time.


Having hit the kerb, I knew there was something damaged, I just had no idea what, and how it could cause the one disc to continue warping. It went to three garages including a main dealer and no one came up with any ideas or could find anything wrong.

Looked at swapping it for something else or pushing it off a cliff as I was just fed up with it.

In the end and by chance, I found someone breaking a similar car on Ebay. I got effectively the entire front right-hand corner off them (for not very much) and changed the lot. I then put on a new set of tyres on for good measure too, got the wheels checked to ensure they were all straight and finally got yet another set of discs and pads.

Having done over 5000 miles now, including hard driving, the car is still perfect and that is with some absolute bargain basement pads and discs on it. I checked the discs for run-out after 4000 miles and it was well within the expected tolerances.

The suggestion now was that the hub carrier might have been damaged and that was causing the calliper to pull the disc out of shape. Whether or not that was the issue I don’t know. But the car is (touch wood) sorted and I am finally finding the love for the car again, and enjoying driving it.

TylerDurden

Thanks for that account mate, it will give us all something else to check out.

I was wondering though, how did you narrow it down to the drivers side?

Ive had my car checked so many times now, and had a wheel baring replaced on the drivers side £600 later and the problem is still there .

spent arounnd 1k on replacement discs and pads every few 3 months.

The hub carrier is it something like this ? http://cgi.ebay.co.uk/Impreza-STI-Ve...-/180657777503

How would I know if mine is damaged ? All the garages I have been to say everything is fine, Subaru are blaming it on non oe disks and pads, which I think is a load of rubbish.

Any glad you got your car sorted, I hope to do the same and actually enjoy driving it.

matt-c

iTrader: (5)

Anyone have a link to the front hub carrier part ?

grahamc

iTrader: (10)

Well said I would come back... from what the garage was told me, I have some how managed overheat the pads and they have become brittle cause bad wear on the discs.

Solution
PF discs to be skimmed
New rear discs
EBC bluestuff pads allround

Also have some play in one of the steering arms, so that is being replaced as well.

The good news, is that the rear cage is in and the rear firewall

matt-c

iTrader: (5)

My car is booked in on the 4th for more investigation, will report back also.

grahamc

iTrader: (10)

Cool

Im relatively unimpressed right now, as with what has been spent on these things, I could have gone for a full (front and rear) D2 or K-Sport conversion...

But I dont care, so long as it is all sorted......

As for mine, parts are on order, so should know if its all fixed in a couple of days.

sprigeteer

iTrader: (9)

^^^Fingers crossed for you - good thread to keep topped up. Such an infuriating set of symptoms.

TylerDurden

Just wondering how much of a gap is there supposed to be between the pads and disc?

I was having a look at mine earlier and there is no gap at all, will stick a photo up later, but wondering if the brakes are binding.

matt-c

iTrader: (5)

That's normal, they are sort of in contact but with zero pressure.

M.

matt-c

iTrader: (5)

Jack it up and make sure you can turn the wheels by hand.