t33zr Posted April 17, 2006 Report Share Posted April 17, 2006 I know that many people use water in theyre HS33 brakes.And now i wonder..... can i use water in my Magura louise disc brake!? Quote Link to comment Share on other sites More sharing options...
PaRtZ Posted April 17, 2006 Report Share Posted April 17, 2006 I think not, but dont quote me on that...... Quote Link to comment Share on other sites More sharing options...
Whiteboy Posted April 17, 2006 Report Share Posted April 17, 2006 my mates running water in his 2000 lousie and has had no probs....feels really nice aswell..... Quote Link to comment Share on other sites More sharing options...
munkee Posted April 17, 2006 Report Share Posted April 17, 2006 I remember this being suggested on a downhill forum and was quickly thrown out the window with a string of problems suggested.Two of the simplest were:Brake freezing in winter.. do you really want a front disc doing that? i could hack a rear brake doing it whilst i was going down a hill but not a front disc.Water getting heated up due to heat from rotor etc. Quote Link to comment Share on other sites More sharing options...
Jsy Ben Posted April 17, 2006 Report Share Posted April 17, 2006 yeh its something to do with the water getting heated through the cyclinder (bit by the disc itself) then i imagine the water would evaporate or do a similar process, either way the end result is air in the system im sure.i wouldnt do it, just splash out on that whole 4 pounds Quote Link to comment Share on other sites More sharing options...
ScotchDave Posted April 17, 2006 Report Share Posted April 17, 2006 When liquids boil (no matter which) they give off gas introducing bubbles into the system which make it feel pish. Water has a lowish boiling point for a brake fluid. If you're dead set on using water I suggest heating the water til it bubbles and leaving it there for a 5 minutes before using it to bleed, reason being that most of the gas dissolved (not as part of the water itself) will be released by this meaning that if it boils then the consequences will not be so dire. Quote Link to comment Share on other sites More sharing options...
CBProductions Posted April 17, 2006 Report Share Posted April 17, 2006 When liquids boil (no matter which) they give off gas introducing bubbles into the system which make it feel pish. Water has a lowish boiling point for a brake fluid. If you're dead set on using water I suggest heating the water til it bubbles and leaving it there for a 5 minutes before using it to bleed, reason being that most of the gas dissolved (not as part of the water itself) will be released by this meaning that if it boils then the consequences will not be so dire. how you work that one out , if you boil the water again it will do the same thing its not like its going to go hang on weve been here once we arnt going to do it again?Not advisible in my opinion , just use the proper stuff or get a cable disc Quote Link to comment Share on other sites More sharing options...
ScotchDave Posted April 17, 2006 Report Share Posted April 17, 2006 (edited) Read the post, only gases dissolved in the water will be released (the air), but if you boil it again steam will be produced which will be turned back into water once it cools, however inevitably some water molecules will disassociate and give oxygen and hydrogen. Yes gas will be released, but less than with the unboiled water as most of the gases dissolved in the water have been removed.I'm doing advanced higher chemistry and physics, I can ask my teacher tomorrow if you like, but this is what happens. Edited April 17, 2006 by div Quote Link to comment Share on other sites More sharing options...
Greetings Posted April 17, 2006 Report Share Posted April 17, 2006 Yet if the water starts boiling all you need is to press the leaver, it will raise the pressure thus raising the boiling point of water. Am I right?Getting a bit off topic :$ Quote Link to comment Share on other sites More sharing options...
ScotchDave Posted April 17, 2006 Report Share Posted April 17, 2006 Sort of, it will raise the boiling point, but if the water has boiled in the brake you will probably need a rebleed, this applies to pre-boiled water as well as normal water. However if you pre-boil the water it will release a smaller amount of gas while boiling so your brake will not feel as awful. Quote Link to comment Share on other sites More sharing options...
CBProductions Posted April 17, 2006 Report Share Posted April 17, 2006 :$ only asking ...... I just dont understand why repeating the same process would provide less gas(steam) , does that mean when you re boil your kettle it does the same thing ? Quote Link to comment Share on other sites More sharing options...
Greetings Posted April 17, 2006 Report Share Posted April 17, 2006 :$ only asking ...... I just dont understand why repeating the same process would provide less gas(steam) , does that mean when you re boil your kettle it does the same thing ?it won't help, it's water vapour that is released, and that is water so you only get rid of the gasses when you have no water left Quote Link to comment Share on other sites More sharing options...
dave85 Posted April 17, 2006 Report Share Posted April 17, 2006 The amount of steam released stays the same however many times you boil it, all the first boiling does is to drive out any gases dissolved in the water e.g. (air/oxygen, found in most water, its what fish breath) Quote Link to comment Share on other sites More sharing options...
CBProductions Posted April 17, 2006 Report Share Posted April 17, 2006 The amount of steam released stays the same however many times you boil it, all the first boiling does is to drive out any gases dissolved in the water e.g. (air/oxygen, found in most water, its what fish breath)Thank you Quote Link to comment Share on other sites More sharing options...
ScotchDave Posted April 17, 2006 Report Share Posted April 17, 2006 Sorry, might have gone on a wee bit of a bender there but I'm writing a chem report and it's doing me head in.Anyway, the water that comes out of your tap has gases dissolved in it, for example air. Now when you boil water it gives off these gases producing bubbles in your brake and making it feel shit. Also when you boil water it gives off steam, this will recondense into water when it cools, the water molecules also dissasoicate into minute anmounts of hydrogen and oxygen, but this can be neglected for the present.So when you boil your water you get gasses and steam, but the steam will turn back into water when it cools, your brake will feel better again once it cools. However these gases will not redissolve easily, so if we can remove them before we introduce the water into the brake if the water boils your brake will not be as badly affected if it boils as less gas will be given off.If you have any more questions PM me. Quote Link to comment Share on other sites More sharing options...
am4zin Posted April 17, 2006 Report Share Posted April 17, 2006 This is all getting a bit technical isn't it? If we rack it up a notch, one can argue that it's best to use distilled water that has been boiled and cooled just before it has been bled into the brake. When the water heats up and wants to turn into a gas, then the impurities in the water act as a catalyst for this change of state to occur: When physicists are looking at radioactivity and ionisation, they sometimes use this idea, by having very pure liquid hydrogen under pressure in a massive tank. Just before the experiment, they quickly release the pressure, and the liquid hydrogen becomes superheated (I think that's the term): It wants to become a gas again because the conditions are extremely favourable, but can't until some ions come shooting through the liquid from the experiment, which allow the hydrogen to form into a gas along the path the ion has taken, and so physicists can see where an invisible ion has been by looking at the path of hydrogen bubbles.I'm sure though all this science isn't needed in trials as the effects are negligable, but in theory, it might help to distil and boil water if you want to give it a go. Quote Link to comment Share on other sites More sharing options...
Dan Clark Posted April 17, 2006 Report Share Posted April 17, 2006 I used water in a Louise once, worked fine for me.Trials doesn't tend to create over 100 degress worth of heat I found. Quote Link to comment Share on other sites More sharing options...
ScotchDave Posted April 17, 2006 Report Share Posted April 17, 2006 it won't help, it's water vapour that is released, and that is water so you only get rid of the gasses when you have no water left It is water, which then recondenses back into water, Quote Link to comment Share on other sites More sharing options...
ManxTrialSpaz Posted April 17, 2006 Report Share Posted April 17, 2006 I used water in a Louise once, worked fine for me.Trials doesn't tend to create over 100 degress worth of heat I found.Yeah, That was a Downhill forum, they are kinda always moving and always in need of break feathering. Trials doesn't use the front brake quite that much so I don't think the water boiling will be much of a problem. Quote Link to comment Share on other sites More sharing options...
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