E46 330 Brake problem...sticking calliper? *Fixed*
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    Brake problem...sticking calliper? *Fixed*

    Need a bit of help....it appears the front offside brake is sticking, stripped it down and cleaned and the piston appears to move ok but when the brakes are applied then released when I try to spin the wheel it's very stiff. What I found is there seems a very small amount of movement in the caliper, hard to explain but if I put a screwdriver between the caliper and the hub part of the rotor I can move the caliper slightly to the side and this releases it and the wheel then spins freely, I was thinking maybe the sliding pins are worn and the caliper is slightly twisting when braking?....any help would be greatly appreciated
    Last edited by MartynD; 02-09-2012 at 11:05.

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    Did you copper grease the slide pins when you put it back together ?

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    MartynD (01-09-2012)

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    Quote Originally Posted by Ferret View Post
    Did you copper grease the slide pins when you put it back together ?
    No mate... Used high temperature silicon lubricant, maybe that's not the best to use

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    That may not be too good for the rubber, with it being silicone based - But for now, it rules out the slide pins being stuck/sticking.

    I can't visualize what you mean when you put the screwdriver between the hub part of the disc and the caliper to free it off, bearing in mind the calipers do 'float' in the carriers so there would be movement of the caliper, so hopefully someone more experienced can help with this

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    MartynD (01-09-2012)

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    Thanks Chris... I'm going out to strip it down again and see if I can find out more

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    Sounds like the sliders are stuck, did you take them out and make sure they are rust free and lubed?

    Why you have the calliper off again push the pedal(be careful not to blow the seal though) and test how hard it is to push back in.

    Are the pads free to move and not sticking in the carrier?

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    MartynD (01-09-2012)

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    Well....stripped it all out, as far as I can see nothing is sticking, the piston moves in and out fine, I tried the calliper without the pads in and slides easily, the only thing I can see is when the pedal is pressed the calliper seems to twist slightly and you have to move it slightly to the side after to allow it to release.....strange :(

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    So what you're saying is that the caliper is somehow twisting when braking?
    Worn sliders would be my 1st guess mate.

    Been looking at calipers myself Martyn, if you need to replace it I came across this place who'll refurb 2 calipers for 105 if you can wait 2 or 3 days.
    http://www.brake-caliper-painting.co...l#.UEJVg-W3PJt

    Sent from my GT-I9100

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    Did you pump the piston out a little and have a look at the piston itself, pull back the rubber and inspect the piston surface.

    If it were me I'd have the piston completely out and make sure there's no corrosion under the rubbers.
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    Quote Originally Posted by simonsays View Post
    So what you're saying is that the caliper is somehow twisting when braking?
    Worn sliders would be my 1st guess mate.

    Been looking at calipers myself Martyn, if you need to replace it I came across this place who'll refurb 2 calipers for 105 if you can wait 2 or 3 days.
    E46 BMW 330 Brake Calipers

    Sent from my GT-I9100
    Cheers Simon....I'll have another look tomorrow at the piston and if no joy will give them a call

    Quote Originally Posted by Ronnie View Post
    Did you pump the piston out a little and have a look at the piston itself, pull back the rubber and inspect the piston surface.

    If it were me I'd have the piston completely out and make sure there's no corrosion under the rubbers.
    Cheers Mark.....I was a bit worried that I'd pop it out to far will have another look tomorrow

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    Ronnie (01-09-2012)

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