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Thread: Bleeding Brakes - Few Q's

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    Default Bleeding Brakes - Few Q's

    Hi,

    Fitting new brake discs/pads all the way around so thought might aswell do the fluid! But a few Q's:

    1) Whats the best system? This will be a one man operation so i see two options, either use one of those Eezi Bleed Pressure kits which eliminates pedal pushing and forces the fluid through with the spare tyre pressure. OR the other one i've seen is basically tubing with a one-way valve, so you open up the bleed screw and pump the peddle and air cannot come back through. What would you recommend?

    2) How do you exactly replace the fluid lol. In the sense, how do you drain the old stuff? I know you suck up as much from the resevoir using a syringe, then pour the new fresh stuff in and bleed till the fresh oil comes through but then surely the new stuff will just mix with the old stuff? Or do you need to 'waste' some of the new fluid in flushing the old stuff out? So keep bleeding untill what comes out is as fresh as the new oil?

    3) Which fluid (dot4?) and how much for a 2003 1.8 SXI?


    Thanks!

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    y would u bother changing the fluid? it wont make any difference to the breaking.
    a manual way to do it is to smaiple open the bleed nipple until the fluid leaks out. the fluid itself should puss out any air.

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    Quote Originally Posted by yoclick View Post
    1) Whats the best system? This will be a one man operation so i see two options, either use one of those Eezi Bleed Pressure kits which eliminates pedal pushing and forces the fluid through with the spare tyre pressure. OR the other one i've seen is basically tubing with a one-way valve, so you open up the bleed screw and pump the peddle and air cannot come back through. What would you recommend?
    By far and above the best way IMO is to use one of those. It makes the whole job soooooomuch easier. All you need to do is make sure you top up the tyre now and again to keep the pressure up or it all starts to flow too slowly.
    Quote Originally Posted by yoclick View Post
    Hi,

    Fitting new brake discs/pads all the way around so thought might aswell do the fluid! But a few Q's:

    1) Or do you need to 'waste' some of the new fluid in flushing the old stuff out? So keep bleeding untill what comes out is as fresh as the new oil?
    Yep, that's exactly it if you use the Eezi bleed. You simply push through flesh fluid, undo each bleed valve in sequence and the fresh fluid pushes out the old fluid. The sequence to do the bleeding is NSR, OSF, OSR and NSF as you start furthest from the reservoir and then go diagonally.
    Quote Originally Posted by yoclick View Post
    3) Which fluid (dot4?) and how much for a 2003 1.8 SXI?
    Dot 4 will do you just fine - the stuff from Vx in 250ml bottles is priced not too badly. You can just about manage it on one bottle but I'd get two and then you can give them a good bleed through to really make sure it's all fresh fluid that's in.

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    Quote Originally Posted by new2theroad View Post
    y would u bother changing the fluid? it wont make any difference to the breaking.
    It will if the fluid has been in for a while. Recommended interval is two years and as brake fluid is hygroscopic (absorbs water) over time the braking will deteriorate slightly.
    Quote Originally Posted by new2theroad View Post
    a manual way to do it is to smaiple open the bleed nipple until the fluid leaks out. the fluid itself should puss out any air.
    The fluid won't just fall out with gravity,it needs pressure to push it out. Also you need to be pushing fresh fluid through, or using some one-way valve thing, or your going to introduce air into the system - not good.

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    Oi! I'll 'she' you!

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    Quote Originally Posted by Duncan View Post
    I'll 'she' you!
    Is that offer open to anyone...?

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    Quote Originally Posted by Duncan View Post
    Oi! I'll 'she' you!

    Ahahaha! Didn't notice my bad! Sorry fella!

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    Cheers Duncan!
    Thanks for also telling me the order to bleed, was just about to ask!
    I also thought the fluid was much more, local Wilco were selling 1litre for £5 and wasnt sure if that would be enough lol. I'll check with Vauxhall though as if its only a few quid more, i might aswell get it from them.

    Thanks again buddy

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    Quote Originally Posted by Penfold101 View Post
    Is that offer open to anyone...?
    Oh hello! Save yourself the journey down here m8, just nip over to Liverpool docks in a skirt and heels and I'm sure you'll get sorted soon enough!

    Quote Originally Posted by Telly Addict View Post
    Ahahaha! Didn't notice my bad! Sorry fella!


    Quote Originally Posted by yoclick View Post
    Cheers Duncan!
    Thanks for also telling me the order to bleed, was just about to ask!
    I also thought the fluid was much more, local Wilco were selling 1litre for £5 and wasnt sure if that would be enough lol. I'll check with Vauxhall though as if its only a few quid more, i might aswell get it from them.

    Thanks again buddy
    You're welcome.

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