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Posted by Sherman in Idaho [24.32.202.166] on Saturday, February 23, 2013 at 19:08:31 :
In Reply to: Help needed! Brake bleeding posted by Sterling from Texas [166.147.123.164] on Saturday, February 23, 2013 at 18:51:43 :
I don't think it's your hair, but I guess you can pull it out and see if that helps.
My brake bleeding method is to get a short piece of 1/4" rubber vacuum or fuel hose, 20' of 1/4" clear vinyl tubing, open the wheel cylinder bleed vale a bit, use the rubber hose to connect the vinyl tubing to the bleed screw, stick the other end into the MC reservoir, and start pumping the pedal slowly. Watch the reservoir and top it off with brake fluid when it gets low. The advantage of this is it only takes one person, the equipment is cheap, and you can pump and pump until you get every last bit of air out, which is easy to see on account of the clear tube. I've never tried a power bleeder. It's probably a nice thing for a commercial shop to have, but the one-man clear hose method has always worked fine for me and is cheap and simple and doesn't require cobbling together some sort of adapter.
You traditionally start with the right rear, since it's the farthest from the MC, then left rear, then right front, and then left front. However, if you find that there's one that just won't bleed, try the others. If you can get even one of them totally bled, that proves the MC is good and you don't have to futz with it any more.
It would be strange to have air get into the lines anywhere downstream of the MC, though, without brake fluid getting out. Have you checked carefully for leaks? Pressed hard on the brake pedal to see if it slowly leaks down or if it's just springy from air in the lines? If the pedal goes down slowly and eventually gets all the way to the floor, you have a leak somewhere. It might very well be leaking inside brake drum, where you won't see it unless you pull the drums.
It's strange that a good brake shop wasn't able to find the problem, though. I'll be curious to hear what it turns out to be.
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