Ive recently replaced front discs with ebc drilled and grooved. And red stuff pads. After maybe 2 months driving ive developed a vibration at about 40mph under braking. I changed the discs and pads for brand new standard pads and discs and the problem seemed to go away. Until the other day when the vibration returned. They were only on the car for 2-3 weeks. Could this be the hub or is there something else causing the problem? Its doing ma head in and also costing me!!

Did you get all the crap off the hub prior to fitting the new discs n pads as that can cause the disc to warp.:)

Yes mate! :p clean with wire brush until silky smooth!!

It could also be your brake fluid fooked as its possibly boiling up under hard braking.Try changing your fluid to some fresh dot 4.That may help

Been replaced! I look after the old girl but shes lettin me down now!! Whats a rough price id be lookin to get for her if id to sell her? Its a 94 uk auto full service history 18" demon alloys michelin tyres new all round. 139000 miles with a recon engine fitted with zedworld last year. Paid £3600 for it last august.

Only a thought, but a worn tension arm/rod can cause those effects, large rubber bushing, it's filled with silicone, you will be able to see if it is cracked and the juices are coming out, just a thought mate...

Cheers mate. I think it has been replaced before cos there are no leaks and it 'feels' tight. Could it be the hub flange thats warped?

You should check the disc's run-out (see: http://www.fordscorpio.co.uk/manual/brake/BrakeDisk.pdf) you can also check the hub in the same way. If the disc's failed again then you have to find out what causing it (usually over heating /sudden cooling of the discs)I hope this helps.

No offence but were they branded oem discs or e bays finest chocolate specials ? and did you break them in properly ?

have you tried bedding in your brakes?

 

see here for more info.

 

http://www.tirerack.com/brakes/tech/techpage.jsp?techid=85

 

Failure to follow these procedures may result in brake judder, excessive noise, or other difficulties in bedding-in the new brake pads. The pads need a fresh surface to lay down an even transfer film. Residue from the previous pad compound on the surface or an irregular surface on a used rotor will cause the pads to grip-slip-grip-slip as they pass over the rotor surface under pressure. The resulting vibration will cause noise and telegraph vibrations through the suspension and steering wheel. This vibration is known as brake judder or brake shimmy. This is typically caused by an uneven transfer film on the rotor surface or an uneven surface on the rotor not allowing that transfer film to develop evenly. This is often misdiagnosed as a warped rotor

 

Another article here as well, HTH

 

http://www.stoptech.com/tech_info/wp_bedinperformance.shtml

without sounding cheeky i am a manager in a fast fit garage so i know all about bedding brakes in. the ebc discs came from ebc through a ukpa supplier. they cost over £200. ive been lookin for a disc runout dial for weeks to test hubs and discs but noone has one anymore. the other new discs were cheaper Pagid ones from euro car parts but they are meant to be oe quality. im going to change tension rods (just in case). whats the best and whats the verdict on just bushes or full adjustable rods? cheers for all your responses guys!

Has does your fast fit garage check run out on discs then without a dti gauge and mag mount ?

Was just gonna ask the same!^^^ want to borrow mine LOL!:ph34r:

Another common prob is a sticky caliper (ask Jeff)

We have a rolling road. But we dont check disc runout. We used to years ago but now we use the rolling road and minimum spec. I freed off all pistons before fitting new discs. I dont want to sound like a know it all but ive done everyrhing i can think of and i appreciate all ur ideas. Ive ordered new bushes from zcentre for tension rods in case they are away. And im going to swap discs and pads side to side and check on rolling road again. That should tell me if its the hubs eh? Hope its not hub cos nissan are lookin for £208 plus vat per side!! :( was thinkin of gettin a 350z as i had a misfire but ive since replaced the faulty injector and is now running sweet as a nut! Need this vibration sorted out tho!!

did you check the top ones (camber arm) as well?

 

when mine wore out it caused a similar vibration.... just a thought.. :)

did you check the top ones (camber arm) as well?

 

when mine wore out it caused a similar vibration.... just a thought.. :)

 

Could be this as my control arm has gone one side and I have a vibraton now

Hi matey

I have this problem and its the top link? have a look at them with a crow bar, was ok with stock disks but when i upgraded the problem started, i still need to sort it LOL!!

Theres no play in any of the suspension. checked all bushes and arms everything is solid. has anyone got a spare couple of drive flanges they could lend so i could test?