Mark W Posted March 3, 2005 Report Share Posted March 3, 2005 Ahoy hoy. Basically, last night I left my bike in the caravan in our back garden instead of our garage. It was well cold (-5C), and my front Magura froze solid. Does this put any more pressure on the seals, or not? Is it going to damage the brake in any way? Thanks for any help, Mark. Quote Link to comment Share on other sites More sharing options...
thechink Posted March 3, 2005 Report Share Posted March 3, 2005 just get the hair dryer out. lol thechink Quote Link to comment Share on other sites More sharing options...
Si-man Posted March 3, 2005 Report Share Posted March 3, 2005 Mine did that last year and cracked the lever by the bleed screw when I decided to bleed it with mineral oil the next day. Sholud use mineral oil at this time of year until it starts to warm up (Y) Quote Link to comment Share on other sites More sharing options...
Mark W Posted March 3, 2005 Author Report Share Posted March 3, 2005 I'm not planning on bleeding it any time soon though, so hopefully I won't compound it's problems by tinkering with it at all. Quote Link to comment Share on other sites More sharing options...
Tartridge Posted March 3, 2005 Report Share Posted March 3, 2005 Depends how badly it froze, shouldnt cause any issues. Stick some antifreeze in it, you only need a tiny bit (Y) Quote Link to comment Share on other sites More sharing options...
Lee_Buchanan Posted March 3, 2005 Report Share Posted March 3, 2005 (edited) Off Topic But recently i have noticed that in my left piston on my rear magura the piston is well slower at returning than the opposite one,i have tried using gt85 but diesnt seemed to of worked. Any other ways to sort it ?? Cheers lee (Y) Edited March 3, 2005 by Mr Koxx Quote Link to comment Share on other sites More sharing options...
Tartridge Posted March 3, 2005 Report Share Posted March 3, 2005 Use WD40 instead. I've tried GT85 before but it just makes it worse. Quote Link to comment Share on other sites More sharing options...
Lee_Buchanan Posted March 3, 2005 Report Share Posted March 3, 2005 Ok cheers. :( Quote Link to comment Share on other sites More sharing options...
Mark W Posted March 3, 2005 Author Report Share Posted March 3, 2005 Woo! It thawed, and there seems to be no damage... Quote Link to comment Share on other sites More sharing options...
JT! Posted March 3, 2005 Report Share Posted March 3, 2005 When water freezes it expands, so it should push you blocks onto the rim, if they are all the way to the rim, the it might cause damage, but if they arent, it should be ok. :( Quote Link to comment Share on other sites More sharing options...
trials_pimp Posted March 3, 2005 Report Share Posted March 3, 2005 Just make sur it is fully thawed and warmed up before you try and use it. If it is slightly frozen, but moves, the seals could be damaged, as they could still be a little frozen, so when you move the brakes, the seals wont flex as they should, but they will crack. I cant see it making any serious damage, as long as there was a release for the pressure, ie the pads can move without obstruction. As for the GT85/WD40 trick. I wouldnt bother. I tryed this when my pistions were getting slow, and the GT85 ate the seals. Just re-bleed, remove the brakes and the pads. Carefully pull the lever until the piston is right out, then clean it, and pump a few times to get everything moving..... Quote Link to comment Share on other sites More sharing options...
CH!P Posted March 3, 2005 Report Share Posted March 3, 2005 Good old Magura fluid, can't beat the stuff :( Quote Link to comment Share on other sites More sharing options...
Davetrials Posted March 3, 2005 Report Share Posted March 3, 2005 Depends how badly it froze, shouldnt cause any issues. Stick some antifreeze in it, you only need a tiny bit :( ← I bled mine with 1:5 anti:water and it was poo as poo gets, it was sponge tastic, came straight out. ment to use 1:3 too, Sexymike. Quote Link to comment Share on other sites More sharing options...
Tartridge Posted March 3, 2005 Report Share Posted March 3, 2005 I bled mine with 1:5 anti:water and it was poo as poo gets, it was sponge tastic, came straight out. ment to use 1:3 too, Sexymike. ← Cant have been bled right, sponginess doesn't come down though the fluid - liquid is compressionless. Quote Link to comment Share on other sites More sharing options...
Dr. Nick Riviera Posted March 3, 2005 Report Share Posted March 3, 2005 (edited) I bled mine with 1:5 anti:water and it was poo as poo gets, it was sponge tastic, came straight out. ment to use 1:3 too, Sexymike. ← someone doesnt know shit about hydraulics! liquids dont compress : record for being beaten by tartridge a whole ten minutes! ( as in posted earlier not beaten.............) Edited March 3, 2005 by daahnhillaaaa Quote Link to comment Share on other sites More sharing options...
tank_rider Posted March 3, 2005 Report Share Posted March 3, 2005 When water freezes it expands, so it should push you blocks onto the rim, if they are all the way to the rim, the it might cause damage, but if they arent, it should be ok. :( ← that wont really run true, as even if the pads move all the way to the rim, the small amount of fluid in the system wont be enough to cause a higher pressure than is caused when you yank on your brake lever. Quote Link to comment Share on other sites More sharing options...
Mr Motivator Posted March 3, 2005 Report Share Posted March 3, 2005 (edited) liquid is compressionless. ← You sure? Thought you could compress water it a tiny tiny tiny bit as there is still some space between the atoms :( Doubt it Edited March 3, 2005 by Sam@SouthTrials Quote Link to comment Share on other sites More sharing options...
tank_rider Posted March 3, 2005 Report Share Posted March 3, 2005 You sure? Thought you could compress water it a tiny tiny tiny bit as there is still some space between the atoms :( Doubt it ← Your right, but it wouldnt be noticeable unless you are measuring everything extremely accurately. This change is sooo small that all the fluid mechanics i have done so far at uni has treated fluid flows as incompressable. Quote Link to comment Share on other sites More sharing options...
Shaun H Posted March 3, 2005 Report Share Posted March 3, 2005 http://www.physlink.com/Education/AskExperts/ae15.cfm :( Quote Link to comment Share on other sites More sharing options...
Will Arnold Posted March 3, 2005 Report Share Posted March 3, 2005 hey, hey, is jelly a fluid? if so then that compresses! :S i have my bike bled with water and it doesent seem to have frozed in lower that -1 degree temperatures(it was in the shed) :( maybe im just lucky :) Will Quote Link to comment Share on other sites More sharing options...
JonPace Posted March 4, 2005 Report Share Posted March 4, 2005 (edited) mines done this about 100 times just take a blowtorch to your hosing Edited March 4, 2005 by JonPace Quote Link to comment Share on other sites More sharing options...
JT! Posted March 4, 2005 Report Share Posted March 4, 2005 that wont really run true, as even if the pads move all the way to the rim, the small amount of fluid in the system wont be enough to cause a higher pressure than is caused when you yank on your brake lever. ← Sorry i didn't realy make myself clear, when the brake blocks are against the rim, when the water freezes, the expansion will start doing damage to the insides, the tube stuff like that. Where as if the blocks are off the rim when they forze, all the expansion of the water has gone into moving the blocks. Still not clear but it'll do. :blink: Quote Link to comment Share on other sites More sharing options...
Mark W Posted March 4, 2005 Author Report Share Posted March 4, 2005 It thawed. Went out for a ride last night, doing loads of gaps and backwheeling (not much front brake required stuff), and the f**ker froze up on me. Was fine, I went into the shop, bought a drink, came back out and it had started to get hella weird, then got home and it was almost impossible to move the lever. In the house for half an hour, hunky dory. Quote Link to comment Share on other sites More sharing options...
roozor Posted March 4, 2005 Report Share Posted March 4, 2005 Dont worry about it, mine froze lastnight while riding ! :blink: I left it overnight in my bedroom and today it's perfedct again! Quote Link to comment Share on other sites More sharing options...
bluecatracingcat Posted March 5, 2005 Report Share Posted March 5, 2005 I'm sure I posted yesterday... I run shell mineral oil and it is far far better than Magura blood. I've used it in my rear hs33 for 3 1/2 years and it's still rock hard. Ive got maggie blood in the front and it pumps up in the sun and has a softer feel than the shell stuff. (both good bleeds) I personaly don't see the point of water bleeds when a shell bleed feels just as good and you don't have it freezing on you. Quote Link to comment Share on other sites More sharing options...
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