TurboGoKart Posted December 28, 2012 Report Share Posted December 28, 2012 I've never had an issue bleeding brakes...until the last two I've done. For the last 4ish years now I've used a vacuum bleeder hooked up to my air compressor. Worked like a charm. Until the last two. I hook it up to the bleeder screw, turn it on, and break the screw loose. I can never seem to get a solid stream out now. Only about half of the tube is full with brake fluid, or I continue to get bubbles, even after a loooong time of it running. What are the causes of this, other than the obvious air in the lines? I let it pull fluid thru the farthest line for about 20 minutes LOL and still not filling the tube all the way up to ensure no air. Do I need to go around all 4, then continue to do this? Is my rubber grommet that goes on the screw worn out and pulling air too? Or I suppose it could be the bleeder screw being rusted and not getting a good seal? Or bad master cylinder? I'm cornfused. Quote Link to comment Share on other sites More sharing options...
Rocky31186 Posted December 28, 2012 Report Share Posted December 28, 2012 What's the year make and model? Some cars have certain bleed procedure other than starting at right rear. Some you have to activate abs pump. Quote Link to comment Share on other sites More sharing options...
gbracing81 Posted December 28, 2012 Report Share Posted December 28, 2012 What's the year make and model? Some cars have certain bleed procedure other than starting at right rear. Some you have to activate abs pump. This was my first thought also. Quote Link to comment Share on other sites More sharing options...
Green Bastard Posted December 28, 2012 Report Share Posted December 28, 2012 Couldn't hurt to check the hoses for leaks, can you see if the air is coming out of the bleeder valve? Quote Link to comment Share on other sites More sharing options...
Cordell Posted December 28, 2012 Report Share Posted December 28, 2012 I've never had great luck with a vacuum bleeder, I use a pressure bleeder when its available or I use the old school bleeder bottle method. Try something else to eliminate the vacuum bleeder as the cause of your troubles. Quote Link to comment Share on other sites More sharing options...
Rocky31186 Posted December 28, 2012 Report Share Posted December 28, 2012 I've never had an issue with a air bleeder. Now I don't end the bleeding process with it because the pedal to me is never as firm as it should be. But to get fluid coming, I haven't had an issue. Quote Link to comment Share on other sites More sharing options...
TurboGoKart Posted December 28, 2012 Author Report Share Posted December 28, 2012 This one was a 92 Accord. No ABS. The initial cause for even needing to bleed the brakes was someone else replacing a bad section of brake line and then of course the spongy pedal feel and poor stopping power that followed. Quote Link to comment Share on other sites More sharing options...
TurboGoKart Posted December 28, 2012 Author Report Share Posted December 28, 2012 Is pressure bleeding just the opposite of vacuum bleeding? Forcing fluid thru the lines back up towards the master to rid of the air? Quote Link to comment Share on other sites More sharing options...
TurboGoKart Posted December 28, 2012 Author Report Share Posted December 28, 2012 But to get fluid coming, I haven't had an issue. I've found the two finger method works best for that. Quote Link to comment Share on other sites More sharing options...
Farkas Posted December 28, 2012 Report Share Posted December 28, 2012 Is pressure bleeding just the opposite of vacuum bleeding? Forcing fluid thru the lines back up towards the master to rid of the air? Other way around. Put pressure in the master cylinder reservoir to push it out the bleeder screws. I'd say your hose has a vacuum leak. Quote Link to comment Share on other sites More sharing options...
jeffro Posted December 28, 2012 Report Share Posted December 28, 2012 Have you tried the old school method of bleeding to be sure there isnt an issue with your method? pump pump pump, hold, release valve, foot to floor, hold, close valve. repeat. Quote Link to comment Share on other sites More sharing options...
TurboGoKart Posted December 28, 2012 Author Report Share Posted December 28, 2012 I just tried that with the farthest from MC line since sometimes it can be harder and take longer to suck the fluid thru that line. Anyone have a link to a pressure bleeder? Who sells those? Are they manual or run by air compressor? Quote Link to comment Share on other sites More sharing options...
Farkas Posted December 28, 2012 Report Share Posted December 28, 2012 Harbor Freight is where I got mine... whatever you do, dont put more than 3-4 PSI on the reservoir or you'll blow out seals. Quote Link to comment Share on other sites More sharing options...
TurboGoKart Posted December 28, 2012 Author Report Share Posted December 28, 2012 Awesome! Good to know. Thanks Farkas. That's where I actually got my vacuum bleeder from, but what you said was my initial thought last night, that my grommet is probably worn out/leaking. Quote Link to comment Share on other sites More sharing options...
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