Can't bleed the brakes - Need help [Archive] - El Camino Central Forum : Chevrolet El Camino Forums

: Can't bleed the brakes - Need help


Jack_K
03-19-2011, 09:41 AM
I have done a complete brake job on my '80. Rotors, calipers, pads, hoses, wheel bearings on the front. Drums, shoes, wheel cylinders, lines, new springs, emergency brake cables on the rear. All new rubber brake hoses including the 'T' for the rear wheels. New master cylinder.

I bench bled the new master cylinder and installed it. Then started bleeding at the right rear. I'm using a Mighty Vac to suck out all the old fluid and air. Also using Speed Bleeders. I religously keep the master cylinder full of fluid.

I've gotten rid of the old fluid and I'm now getting a lot of air and new fluid out. I've gone through almost 2 complete 32 ounce bottles of brake fluid and I'm still sucking air [pun intended] and still on the right rear. I see no leaks anywhere, but air must be getting in somewhere.

Any ideas?

Jack

Geek's 65
03-19-2011, 11:58 AM
So you haven't done any of the other three? Might try going around and bleeding the rest (if you haven't already) to get the air out of those individual runs of brake line and then come back to the right rear and see if it won't clear up.

Yeast1
03-19-2011, 12:07 PM
Agreed! Try the others and see how things develop Jack.
The fleet that I manage at work has the world's worst
reputation for bleeding the rear brakes so I can feel your
frustrations. Good Luck!!
Craig

sirron
03-19-2011, 12:12 PM
You are most likely pulling air through the threads of the bleeders. I start with the vac unit until the new fluid appears. switch over to speed bleeders. The way I use the speed bleeders is: attach a hose to the bleeder and the other end into a suitable can, then crack the bleeder oh maybe a half turn out, hop in the car and pump the pedal three/four times. Go to the next wheel, repeat and so on. The bleeders use a check ball in it so it wont let air back in, you can do the job with one person. good luck..

ssr71
03-19-2011, 12:56 PM
You are most likely pulling air through the threads of the bleeders.

I agree. I had the same issue, and even tried to seal the threads with teflon tape. Didn't work very well. Instead, I finally found a way to get my pressure bleeder to seal on the master cylinder. That's the best way to go if you're doing this solo. If you can recruit a helper, just go back to the classic pump, hold, and release the bleeder method.

doug kendell
03-19-2011, 01:50 PM
hey man, what id do is get a buddy to go at it the old fashioned way, with wrench at each wheel. if you think the master may have gotten air again, redo that just in case. if not then go on with the wheels starting with the LF. do LF, RF, LR, RR. that way the shortest line gets done first, longest last, and that always has had the best result for me. just a suggestion. good luck with it. take care.

Jack_K
03-19-2011, 04:37 PM
Hey SSR71,

How did you get the pressure bleeder to seal? I have one, too, but it won't seal on a plastic reservoir.