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Bleeding brakes (just double checking)

Discussion in 'VR - VS Holden Commodore (1993 - 1997)' started by HRVATSKI_VOJNIK, Apr 13, 2009.

  1. HRVATSKI_VOJNIK

    HRVATSKI_VOJNIK a.k.a KRIS

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    k, well tomorrow I'm gonna replace the brake pads on my VS
    I've looked thought my cars workshop manual, read how-tos and watched a few videos (youtube, expertvilige)

    i know what i gotta do just wanna double check with you fellas
    After i replace the pads and put the calipers back, (i'll do some gentle pumps just to get the pads bedded abit) then I'll start the bleeding

    so i'll get the right sized spanner and place it on the bleeder, then put a tube which is lightly coated in brake fluid, have it atleast 2 inches of the tube above the bleeder, and the end in a bottle.

    I'll get the assistant to gently press the brake pedal to half way, open bleeder, let some of the old fluid out, close bleeder and tell the assistant to let the brake pedal go. then repeat this a few times until there is a nice flow of clean fluid coming out of the bleeder. then repeat with the other calipers

    oh yeah, and make sure that the fluid level is around the max mark on the reservoir before bleeding & after bleeding:p

    then the proper bedding instructions to complete the lot:yeah:

    i hope i got it right, anything I'm missing?

    thanks:thumbsup:
     
  2. hako

    hako Donating Member

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    You will be pumping old fluid from your master cylinder unless you first syringe out all the old fluid from the master cylinder...also wipe the crap up from the bottom of the MC with paper toweling - then fill up with new fluid. Bleed till the new fluid comes out of the tube - this way you are filling the caliper with new fluid which is not contaminated with water which lowers its boiling point.
    Bleed the rear first, the pass side and lastly drivers side. Clean the bleeder screw and use a ring spanner not an open ender. Be careful not to push the pedal past where you normally push to. (not the end of the world if you do)
    Apart from that it looks like you've done your homework. Have fun and Good Luck.
     
  3. HRVATSKI_VOJNIK

    HRVATSKI_VOJNIK a.k.a KRIS

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    won't that let air in?, I'm gonna leave abit of the old fluid at the bottom/base of the reservoir, or will that contaminate the new fluid?
     
  4. hako

    hako Donating Member

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    It won't let air in unless you push the pedal before you fill it with new fluid - the outlet is at the very bottom of the MC and you'll notice tiny pieces of crud and mud at the very bottom which you should remove. Good Luck.
     
    Last edited: Apr 13, 2009
  5. VrWagz1

    VrWagz1 The Wagon on Wheels..

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    just pour new fluid ontop of old fluid. Sure it will contaminate a bit with the old fluid, but what are you gonna do, just keep pumping the pedal till clean stuff comes out on the first one and then the other wont even take half that long as the new fluid will already be in the lines then
     
  6. lil_mickey

    lil_mickey LOUD AND PROUD

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    sounds like you have all the info u need... just remember to close the bleeder before the assistant lets the pedal up. otherwise you will suck air strait back in the line..
     
  7. Chirpstr

    Chirpstr A new project attack

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    Wont matter closing the bleeder before you let the pedal up. If the hose is in fluid there is no way of air getting in. Someone please correct me if I'm wrong.
     
  8. VrWagz1

    VrWagz1 The Wagon on Wheels..

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    correct wavez, thats the idea of having a hose so you can bleed them yourself without sucking air back in when you get off the pedal.
     
  9. Dayvo

    Dayvo Because i can

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    Thats how i done mine the other day .I used a bleeder hose with a one way valve in it .
     
  10. mulligan-can

    mulligan-can ?!?

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    Damn straight mate that is it exactly!
     
  11. hako

    hako Donating Member

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    Air can get in under certain conditions - if the bleed hose is too long and the first stroke of the pedal does not pump all the air out of the hose the remaining air in the hose will rise up the hose and enter the caliper. Safest way is to close the bleeder at the end of each stroke before the pedal returns.
    Also do not reuse the fluid as the bleed process fills the fluid with tiny bubbles!
    A mate of mine does trucks - bleeds them the opposite way by forcing fluid in thru the bleeder and up to the MC....something to do with the length of the lines (only on certain trucks).
     
  12. lil_mickey

    lil_mickey LOUD AND PROUD

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    Sorry, yes you are correct... My bad
     
  13. lil_mickey

    lil_mickey LOUD AND PROUD

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    Lol also correct..
     
  14. Chirpstr

    Chirpstr A new project attack

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    Depends how long you leave the pumping for I suppose. The bubbles don't move that quick with fluid around them. Clear hose is the go.
     
  15. HRVATSKI_VOJNIK

    HRVATSKI_VOJNIK a.k.a KRIS

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    thanks for all the info guys :thumbsup:

    my dad had a go at playing mechanic and broke one of the smaller radiator outlets on his 95 Land Cruiser, so his using my car till he gets it fixed. He doesn't want me to do anything to my car till then.

    i knew it was gonna be an epic fail but he didn't want to listen :bang:
     
    Last edited: Apr 14, 2009

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