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Thread: Brakes - how do the discs budge?

  1. #1
    Regular Member johnmac's Avatar
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    Default Brakes - how do the discs budge?

    Hi "all"

    Firstly a big thanks to "GSI3.2" and "SIMAC" for their help.My brake saga just seems to go on and on...........


    My alloy lock key replacement came yesterday (£28 - don't be as stupid as me!!!) so this afternoon I attempted to replace the rears.Discs are gubbed due to the fact I had zero pad left.Pads off ok,piston wound back fine (thanks Mark) but can I budge the disc???? I sprayed penetrating lubricant over the nuts (setting myself up!!!) but cannot get them to move or the torx (not sure about the spelling) screw for that matter.I have a torx set but none seem to be a perfect fit.Its "slipped" once already,don't want to chew the face up.

    Will the fronts be as bad? I need to do them as well


    John

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    Regular Member Gsi3.2's Avatar
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    as the disc is coming off, try giving the hub edge a few sharp taps to break any 'hold' that the hub will have, then you'll have to get the correct torx bit.. hit it a few times to shock any rust in the thread into giving up and it should unwind..

    the fronts will prob be the same...so get yer hammer ready, but only hit a disc you are going to change, never one you are going to keep on the car..

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    Regular Member johnmac's Avatar
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    What is the best method of getting the nuts off of the caliper bracket? Do I need to remove this in order to get the disc off? Any idea what size of torx is needed

    Have I got this right? (once pads are out) In order to get the disc off, I need to remove the 2 x nuts to get the caliper bracket off,then whack the disc a bit to loosen things off,then try to remove the torx screw?

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    Regular Member danlat1415's Avatar
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    I had a few problems with Torx when I was doing an oil change, and ended up snapping a torx bit.

    I got a new set from Halfords (about £19.99) They have a lifetime guarantee so no breaking. The set came with: T20 T25 T30 T40 T45 T50 T55. All the Torx bits you could ever need for any part of the car. They fit on the end of your wheel wrench so you can get a good 2foot bar on the end as leverage.

    If i remember correctly it's the T45 you'll need for that.

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    Regular Member Gsi3.2's Avatar
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    Quote Originally Posted by johnmac View Post
    What is the best method of getting the nuts off of the caliper bracket? Do I need to remove this in order to get the disc off? Any idea what size of torx is needed
    yep.. thats the one.. no idea of size off the top of my head tonight.. but i'll see if i get inspiration later on..
    Quote Originally Posted by johnmac View Post
    Have I got this right? (once pads are out) In order to get the disc off, I need to remove the 2 x nuts to get the caliper bracket off,then whack the disc a bit to loosen things off,then try to remove the torx screw?
    yep.. that should loosen it enough to let it come off.. also, try tapping the head of the small torx bolt a bit to loosen the securing bolt..

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    Regular Member simac's Avatar
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    No probs John, it's a shame the key didn't fit. After your experience I have made sure that mine is in a very safe place !

    Hope you get sorted soon

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    Hi there, I dont know if this will help, but I just replaced my front discs and pads on my Vec C. The 2 torx bolts on the caliper are T20 sockets, they will have threadlock on them, so put the T20 socket on the bolt and give it a whack. They are also torqued up to 290nm, so they will take a massive heave ho to shift them.

    On the front, the discs are held on by a short 5mm allen key bolt, it has no threadlock on it, and according to the specs I have, is only tightened up to 9nm, but both of mine were stuck, used an impact wrench on one, but found it better to use a good allen key on the other.
    Once the caliper is unbolted, tie it up to a mounting point so as not to damage the brake lines.

    Also, with regards to getting the disc off, once the allen bolt is off, I found that there's a point on the back of the disc that seems to respond better to hitting than anywhere else. Imagine that the disc is a clock face, as you look at it you need to hit the back of the 5 o clock position. I used a wooden block to prevent that nasty ring off metal to metal hammering.


    Hope this helps.

    Tim

    Edit. I forgot to mention, and I know it's stating the obvious, but remove the caliper and the allen bolt before beating the life out of the disc.
    Last edited by spuddevans; 6th February 2007 at 22:27.

  8. #8
    On a Sabbatical VauxVeteran's Avatar
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    If the impact driver dont work, spray it with WD40 and then use a bar extention
    on it.

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