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Thread: Sticky brake caliper?

  1. #1
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    Default Sticky brake caliper?

    I've noticed a whining sound from the rear n/s wheel recently - it gradually becomes noticeable when doing about 50mph - not really loud, more irritating! Noticed that fuel economy is down by about 5mpg recently too though.

    The brake pads on that wheel are worn right down whereas pads on the other 3 wheels are like new. Leads me to think it's a sticky caliper.

    Question is how easy is it to repair a sticky caliper (assuming it's not damaged & needs replacing that is)?

    I'll replace both sets of rear pads too - does anyone know if the caliper can be pushed back in using a G-clamp, or do I need the special tool for rewinding it? (I know they're available on ebay for £25)

    I think the discs are ok - the lip appears to be under 1mm.

    Car's a 2003 Vectra-C 2.2 Petrol Elite.

    Cheers,
    Shaun.

  2. #2
    Ex Vec-C Admin & Founder GARY3306's Avatar
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    could be a sticky caliper but it could also be the pads sticking on the caliper carrier. Before you look at a new caliper, strip it down and remove the pads, clean all the mating services up well and use a slight smear of copper grease. I would definately advise the correct tool for winding back the caliper. Put it all back together, pump the pedal to bring the pads into disc contact again. Take it for a spin then jack the wheel up and see if there's any drag, if there is, new caliper. If not, you've sussed it
    [SIGPIC]VX<font color=Red>R</font> with added Courtenay <img src=https://www.vectra-c.com/forum/images/smilies/biggrin.png border=0 alt= title=Big Grin class=inlineimg />

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    Cheers Gary. Just one thing though - why would you recommend the tool? Is the G-clamp likely to cause damage?

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    Ex Vec-C Admin & Founder GARY3306's Avatar
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    Quote Originally Posted by CodeV View Post

    Cheers Gary. Just one thing though - why would you recommend the tool? Is the G-clamp likely to cause damage?
    It's a possibility, but I would always recommend using a tool designed for the job because it's designed to do the job

    Best way to do it is to use a bleed tube into a bottle with some fluid in (as in bleeding), crack off the bleed nipple half a turn and then wind back the caliper slowly. Once the piston's back in, nip up the bleed nipple
    [SIGPIC]VX<font color=Red>R</font> with added Courtenay <img src=https://www.vectra-c.com/forum/images/smilies/biggrin.png border=0 alt= title=Big Grin class=inlineimg />

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    Regular Member gtr1000's Avatar
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    Vehicle : Insignia

    Trim : Sri

    Engine : 140 Ecoflex S/S

    Year : 2013

    Default

    Best of luck trying to get the parts to rebuild the caliper.

    When I enquired for seals kit on the front of my GSi (302mm diameter), I was told no parts in the UK, 10 days at least from Germany. By this time I'd got the pistons out of the calipers and even if I'd got a seals kit, the pistons were sticking in the calipers as they went in.

    Then asked about exchange calipers, got the same reply. VX parts stock eh?

    Hopefully things will be different on yours but don't hold your breath.

    EDIT - If you don't use a rewind tool on the rears, you only have yourself to blame when it goes pear shaped. G clamps or similar are fine for the front but NOT the rears.

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    Regular Member macdad's Avatar
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    Quote Originally Posted by CodeV View Post

    Cheers Gary. Just one thing though - why would you recommend the tool? Is the G-clamp likely to cause damage?
    The rear caliper needs to be turned as well as pushed in at the same time,as the cal incorparates the handbrake self adjust mech..imho dont try to retract without the proper tool.

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    Thanks to everyone for the advice.

    Just had a thought though - the cars still under a warranty that I purchased. Didn't think it would cover this but according to the documentation it covers "Braking System - internal failure of the servo, master cylinder, wheel cylinders, calipers, pressure regulator, ABS pump, control unit and wheel sensors but excluding all other parts".

    So I'll give them a call on Monday and find out. Hopefully all I'll have to pay for is new pads??

    The only problem is if it's not the caliper then I don't want to be left with a big Vauxhall repair bill - when it would be far cheaper to take it to an independent garage!

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    Default winding tool

    Where can i buy the tool for winding the caliper back for my vectra?

  9. #9
    Regular Member gtr1000's Avatar
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    Vehicle : Insignia

    Trim : Sri

    Engine : 140 Ecoflex S/S

    Year : 2013

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    Quote Originally Posted by amsc17342 View Post
    Where can i buy the tool for winding the caliper back for my vectra?
    Try http://lmgtfy.com/?q=vectra+rewind+tool

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