Midnight Posted March 1, 2005 Share Posted March 1, 2005 I've just changed the brake fluid on my car, but the trouble is in spite of a number of bleeding sessions there still seems to be a air (very tiny bubbles) in the fluid. I've checked all the unions and all are tight. does anybody know where air might be being introduced into the system. I kept the master cylinder well topped up throughout the process but after using a complete large bottle of fluid there are still bloody bubbles appearing. its strange though, because the brake pedal feels nice and hard with minimum travel. Anybody got any ideas?? P.S. I used the old fashion two person method not one of the ezibleed contraptions, which alwayS appear to spray fluid everywhere! Link to comment Share on other sites More sharing options...
Jason Plato Posted March 1, 2005 Share Posted March 1, 2005 if the pedal feels nice and hard with minimal travel , are you sure you have a problem? Link to comment Share on other sites More sharing options...
KevSull Too Posted March 1, 2005 Share Posted March 1, 2005 BUBBLES IN BRAKE FLUID Looks like that'll be Michael Jackson short of a witness for this trial then... 😬You laugh at me because I'm different, I laugh at you because you're all the same. 😬 Link to comment Share on other sites More sharing options...
Joe 90 Posted March 1, 2005 Share Posted March 1, 2005 With time the bubbles will rise and merge. Bleeding all the time stirs things up, so leave it for a couple of days, then try again. If the pedal feel is good, then there can't be too much air in the system. SEP field working, not spotted in 103,100 miles. Some photos on webshots, updated 25 Jan Link to comment Share on other sites More sharing options...
Jason Plato Posted March 1, 2005 Share Posted March 1, 2005 you didnt shake the bottle of brake fluid before filling did you 😬 😬 😬 Link to comment Share on other sites More sharing options...
Myles Posted March 1, 2005 Share Posted March 1, 2005 What system are you using to bleed (Eezibleed etc?) Is it possible air is getting in to the bleed-tube around the nipples (i.e. have you loosened them too-much?) - so that the air isn't actually coming from the bled-fluid? Project Scope-Creep is underway... Alcester Racing 7's Equipe - 🙆🏻™ Alcester-Racing-Sevens.com Link to comment Share on other sites More sharing options...
Jason Plato Posted March 1, 2005 Share Posted March 1, 2005 Myles ....theres a hint in his posting "P.S. I used the old fashion two person method not one of the ezibleed contraptions, which alwayS appear to spray fluid everywhere! " C7 TOP Powered by Hellier Performance 😬 South Wales AO Link to comment Share on other sites More sharing options...
F355GTS Posted March 1, 2005 Share Posted March 1, 2005 Is it possible your bleed pipe is a bit loose or air is getting in around the nipple thread Mark Link to comment Share on other sites More sharing options...
susser Posted March 1, 2005 Share Posted March 1, 2005 Air getting in the nipple is the most likely cause; you might think that this couldn't happen cos the fluid is above Atmospheric pressure, but it gets dragged in due to the Bernoulli Effect. (kinda like a venturi). Put plumbers PTFE tape on the nipple threads (not too much, say 2 turns ), refit the nipple and it stops it. Link to comment Share on other sites More sharing options...
Midnight Posted March 1, 2005 Author Share Posted March 1, 2005 Thanks for the advice guys, I sort of suspected that it might be air getting in via the bleed nipples if too loose. trouble is if you don't open them enough you need two feet press the pedal down. I'll wait a day or so and have a final bash. Kevsull, Bubbles is probably happier in brake fluid than in the kind that Michael might have in store for him. Link to comment Share on other sites More sharing options...
Myles Posted March 1, 2005 Share Posted March 1, 2005 Dave - It's Gareth Harrolds' job to point out the bits I've failed to read.... Anyway: Doh! 😳 Project Scope-Creep is underway... Alcester Racing 7's Equipe - 🙆🏻™ Alcester-Racing-Sevens.com Link to comment Share on other sites More sharing options...
Sheds Moderator Posted March 1, 2005 Share Posted March 1, 2005 My method si to get the assistant to push the pedal gently BEFORE you open the bleed - that way the pressure is positive before you open the taps and the air does not suck back. Link to comment Share on other sites More sharing options...
pete east Posted March 1, 2005 Share Posted March 1, 2005 Jacko gives the term blowing bubbles a whole new meaning 😬 Sorry Ill get my coat. Link to comment Share on other sites More sharing options...
timbo Posted March 1, 2005 Share Posted March 1, 2005 *thumbup* 😬 😬 😬 😬 Wht a gem...... you own joke neatly summised with a 'fast show' anacdote. Emerald Isle's 1st SV 148lbft @ 6091rpm/182bhp @ 6690rpm engineered for low revs Link to comment Share on other sites More sharing options...
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