Brake bleeding..., sucks (pun woefully intended) |
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Brake bleeding..., sucks (pun woefully intended) |
stateofidleness |
Aug 22 2010, 04:14 PM
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#1
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Senior Member Group: Members Posts: 810 Joined: 1-September 07 From: Canyon Lake, Texas! Member No.: 8,065 Region Association: None |
at my wit's end with brake bleeding (who else says "blake breeding" on accident?... ok just me (IMG:style_emoticons/default/smile.gif)) anyways...
tried the old fashioned "get a buddy" method... this helped me find all my leaks... fun.. so after replacing all the lines, the master cylinder and a rear caliper, we tried again (3 weekends into this so far... ) Builds a little pressure, go to next wheel.. try again.. no change, but good flow.. after doing all 4 corners and getting good flow with no air at each one, STILL pedal almost goes all the way to the floor with little pressure... finally got to that point where you don't mind spending money to make the process easier, so i went to FLAPS and got the MityVac thing... $40 later i get home and go back to work... got the process down and got good flow at each tire again, reservoir staying full throughout... STILL sh*tty pedal feel... so at the time of this writing.. i quit! |
Superhawk996 |
Apr 7 2019, 10:31 AM
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#2
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914 Guru Group: Members Posts: 5,891 Joined: 25-August 18 From: Woods of N. Idaho Member No.: 22,428 Region Association: Galt's Gulch |
I've had good luck in the past using a MightyVac to draw vacuum on the bleed screw and then having an assistant push the pedal to build pressure. Then rapidly open the bleed screw.
The combination of pressure in the system + vacuum on the bleeder results in more fluid velocity that will draw air along with it when the bleed screw is opened. As previously stated bleed from the top bleeder. Tapping on the caliper with rubber mallet will also help move stubborn bubbles to the top. Note: yes the MightyVac will pull bubbles past bleeder threads but these will not go backwards into the caliper - they are drawn to the vacuum source. Agree completely that with these bubbles flowing you cannot gauge the "success" of the bleed by whether there is air in fluid. In the end pedal feel is what determines success. |
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