2005 E61 530D Brake judder

[italian job]

I bought a 2005 530D sport privately a few months ago,when i wen't to look at i noticed that it was fitted with brand new discs and pads on the front.The seller stated that they were changed by the garage he bought it from after they fitted pattern parts that warped,these were replaced with genuine BMW parts to cure the warping issue,i test drove the car and no judder was present.
I then began to notice the car juddering on braking,mostly sub 30mph.I did a bit of research and read that the E39 can suffer with brake judder if the compliance bushes are shot,my car has 88000 miles on it so thought that could well be the cause of my problems.
So after a day lay on the drive i have fitted 2 new genuine compliance bushes,the ball joints on the other end of the track control arm felt fine,nice and firm.
All back together,no bloody different
I'm now thinking that i shouldn't have presumed because the discs were new they couldn't be the problem.Will do what i should have done in the first place and check run out.
If that proves to be ok where do you think the next most likely place to check would be? Topmounts?
I'm all ears for suggestions.
To make matters worse,while struggling to un do the ball joint my star bit snapped resulting in me smashing my 1/2" ratchet drive into my forehead leaving me with a decent cut and big bloody lump
Time for a beer.

Cheers Paul.

[ose1665]

did you replace part 12 here?
http://www.realoem.com/bmw/showparts...55&hg=31&fg=05

[italian job]

Thats the ones yes.

[ose1665]

Thats the ones yes.

Well as your used to the spanners you do need to check out the discs again
bad running in of pads can cause problems apparently.
A good strip clean and inspect copper slip the pad contact points ensure no rust on the pad slide/contact areas best to remove the bracket from the hub and get it really clean part 2 here also ensure the guide bolts 6,7 here are clean. These bolts are not lubricated as far as I am aware.
http://www.realoem.com/bmw/showparts...42&hg=34&fg=05

You could also check to see if the pads have arrows on them as they may have been fitted on the wrong sides. Don't ask what the difference is because I don't know and have not been able to find out, all I know is mine genuine for e39 came with a label showing the arrows.

[italian job]

Well as you used to the spanners you do need to check out the discs again
bad running in of pads can cause problems apparently.
A good strip clean and inspect copper slip the pad contact points ensure no rust on the pad slide/contact areas best to remove the bracket from the hub and get it really clean part 2 here also ensure the guide bolts 6,7 here are clean. These bolts are not lubricated as far as I am aware.
http://www.realoem.com/bmw/showparts...42&hg=34&fg=05

You could also check to see if the pads have are arrows on them as they may have been fitted on the wrong sides. Don't ask what the difference is because I don't know and have not been able to find out, all I know is mine genuine for e39 came with a label showing the arrows.

Thanks for taking the time to reply,its much appriciated.
I did strip and clean the front brakes yesterday as my last job(pity i didn't check disc run out at the same time) I replaced the pads as i removed them,although as you mention it i didn't check for arrows just took it as red that they were the right way round.I did clean the guide bolts,and lubricate them i'm afraid,can't think why that might cause a problem?
If the discs are warped i'm thinking they could be skimmed potentially to return to true once i have found the cause of them warping,thinking poor fitting practice or hub out of true?
Cheers Paul.

[ose1665]

I take it that there is no improvement then.
Still you can remove the pins without dismantling anything else and dry them off.. check I am sure they should be dry probably attract dust and gum up otherwise..
Do you have a DTI to check the disc run out?
I found it was quite a hard thing to do keeping the DTI stable enough to get a good reading, used a magnetic base on the inner wing in the finish and was able to read both sides of the disc OK.
Do you have aftermarket wheels and if so do they fit the hub centre tightly or are there packing rings that could be missing...

[italian job]

I'm hoping to be able to borrow the necessary equipment from my father in law who is a retired engineer failing that i have had a quick look in Machine mart and basic stuff isn't too expensive.
Stripping and cleaning the brakes made no difference at all to the juddering but on occasions both my wife and myself have felt as though the brakes sometimes stick on.
Its fitted with standard 18" BMW sport alloys.
Cheers for input.

Paul.

[italian job]

Forgot to add,have you experienced brake judder,i ask because you mention measuring run out,what was the cause of your problems?

[ose1665]

Forgot to add,have you experienced brake judder,i ask because you mention measuring run out,what was the cause of your problems?

I had steering shake under light braking above 55 MPH, OK if you hit the brakes harder... Replaced the bushes same ones as you did, problem solved.
Still think you need to verify the discs are OK to eliminate though.

[italian job]

Got to agree,have borrowed the necessary DTI,the more i think about it the more i think one or both of my calipers have been sticking which has caused the warping problems,as the discs are literally as new if they are warped i'm thinking of having them skimmed to true them up.