well, I put in a new master cylinder, and I was bleeding the brakes. on the rear brakes, there's 2 little bleeder things. and on both sides, one of them continuously put out lots of air, while the other has no air. I'm wondering why this is, and could this be why my pedal is still all mushy?(gets better when pumping brakes though)



so basically, why are there 2 bleeder things on the rear calipers, and do you have to do something special with them to bleed them right?

 

Did you bleed the master cylinder?

This bleeding can be done off of the car, but it's a bit easier when on. Have your assistant pump then hold the brakes. Then loosen one fitting of a hard brake line enough for some fluid and air to come out. Repeat for each fitting until no air comes out. (Do not let brake fluid get on your paint!)

The Haynes manual states that you should use the lower (and upper) brake bleeding screws if the caliper has been emptied of fluid or is new (no fluid in it).

Your brakes should not be spongy. Do yourself a favor and do not drive more than just around the neighborhood until you get this fixed.

I had to bleed the brakes twice. The first time I had a helper, and the second time I just used a vacuum pump (Mityvac from Victoria British). I'll make a better post on this...

 

well, I tried to bleed tha master cylider, but not much came out. also, Its not a brand new one, its a low mileage one off my parts car that worked perfectly, so the MC should already be somewhat bled.

but what I don't understand is why air comes out of one bleeder screw, but fluid with no air comes out the other.

its teh top one on the left side, and the bottom one on the right side. hmm... I don't knonw. I think I'll just take it to school tomorrow(TEC school), and use the power bleeder.


WTF?? so which one am I supposed to use for regular bleeding?

 

Use the lower if there is significant air in the caliper.

Use the upper if there is mainly air in the lines.

Or use the lower first, then close and use the upper to be safe.