LiftdT4R Posted August 13, 2008 Report Share Posted August 13, 2008 Hey, whats up? So Ive been fucking around with the back brake on my 2001 build for a few weeks now. Ive never had issues bleeding it by hand before, but this time I just couldnt get any pressure to build. Only a few drops of fluid come out, and there looks to be no air bubbles. Anyway, the master cylinder, line, and caliper are all brandy new, as well as the banjo bolts and gaskets. I can move the piston in the caliper with a pipe, and everything appears to be mechanically fine. Anyway, I have an EZ Bleeder which is pretty much a syringe that injects the fluid through the bleeder valve, and up through the lines, but all it did was push the fluid through the threads, so I said fuck it, let me buy a mity vac, since thats what everyone beens talking about. Anyway, the mity vac does basically the same thing. Instead of pulling fluid from the resevoir it pulls air through the threads of the bleeder valve. No fluid. I even disconnected the pin from the brake lever thinking maybe the master cylinder was closed up, but even with the master cylinder all the way down, still nothing. I was wondering if any of you guys with the Mity Vac have any ideas. How do you usally do this? I think I may have other problems here, but the Caliper looked fine inside, and everything is brand new. Quote Link to comment Share on other sites More sharing options...
LiftdT4R Posted August 13, 2008 Author Report Share Posted August 13, 2008 Ohh, and when I say its pulling through the threads, Ive tried it with the bleeder valve from about 1/4 turn open to 2 turns open. Quote Link to comment Share on other sites More sharing options...
differentstrokes Posted August 13, 2008 Report Share Posted August 13, 2008 Jay, on my mity vac you snap a plastic fitting over the bleeder valve and then pump it until you start drawing fluid through it into the catch cup thing. Is this the same type of mity vac you're talking about? If so, I usually draw about 2 inches worth of fluid into the cup to get all of the air out and then repeat one more time. Just make sure you start the suction before you open the bleeder and then make sure you keep the suction on until the bleeder is completely closed. As long as you do that and keep the fluid level up in the reservoir, you should be fine. Quote Link to comment Share on other sites More sharing options...
LiftdT4R Posted August 13, 2008 Author Report Share Posted August 13, 2008 Hey, whats up man? Yeah, it is the same Mity Vac, and I'm doing just that, but it wont pull fluid through, all it does is suck in air from the threads/base of the bleeder valve. I also tried using the EZ Bleeder, which pushes fluid through from the bleeeder valve up to the master cylinder, and same deal, it just pushed fluid through the threads of my bleeder. I inspected the caliper, taking it all apart, but no dice, everything looks clean and good. Thanks man. Quote Link to comment Share on other sites More sharing options...
differentstrokes Posted August 14, 2008 Report Share Posted August 14, 2008 What about using some thread tape or even some Yamabond on the threads to see if it seals it up enough to pump them? Just an idea even though the thread tape might not hold up to prolonged contact with the brake fluid, but the Yamabond would probably work somewhat. Quote Link to comment Share on other sites More sharing options...
250psd Posted August 15, 2008 Report Share Posted August 15, 2008 I actually sucked (with my mouth) the fluid through the bleeder and pumped the brake lever from there to bleed it. I put a peice of tubing on the bleeder of course. I wasn't about to spen $40 on a mighty vac. If you choose this method take the cap off the reservoir when you start suckin'. Strange? Yes! But it worked for me. Quote Link to comment Share on other sites More sharing options...
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