I just finished installing SS front lines and bleeding. After bleeding each side for hours I still get air bubbles. Im using a mityvac and at first it wasnt holding pressure when attached to the bleeders. I wrapped the bleeder threads with teflon tape and It solved the problem. I going to try the zip tie the handle to the lever tip but have a question. Do you leave the resivior cap off? For some reason there air bubbles when I sucked out the old fluid, I thought they must have been from the bleeder threads but now I dont know. Any thoughts. Even with the apparent air still in the lines the brake lever is much much firmer.

 

It took hours even with a mightyvac???

 

The bubbles your seeing is probably air coming in from between the mity-vac hose ID and the bleeder OD. If thats the case you've got nothing to worry about as long as you close the bleeder before the mity-vac loses vacuum.

 

Yeah I hope so. The brake lever is WAY better so you might be right. I thought the process was taking too long. I bled the rear brakes in about ten minutes though with no bubbles at all. I didnt change the line though just a bleed. The thing is the bubbles dont appear until I open the bleeder. With the bleeder closed, no bubbles and the pressure dosent drop like i figured it would if it was leaking from where you say.

 

I stopped after about 3 hours. This is my first time doing this and I wanted to make sure I got all the bubbles {air} out. They never stopped coming.

 

I prefer the old fashioned way of bleeding brakes. It just works better. You know when you're done. If you're stuck on the MityVac try gooping up around the threads where the bleeder goes in the caliper with some heavy wheel grease. That'll stop the bubbles. I've never had any luck with the teflon tape.