One man brake bleeders???

[BoostKillsStres]

Does anybody like these? Is it possible when using them to have some air sucked in the bleeder threads when you let up each time on the pedal and causing constant bubbles? I'm having the worst time bleeding the rears after putting on a new brass proportioning valve and MC. The fittings on the prop valve are as tight as I dare go and there are no leaks on the fittings. I keep seeing small amounts of tiny bubbles in the clear bleeder line. I've got the bleeder open about one turn. I've basically got a clear tube submerged into a bottle of fluid and am very slowly pumping the brake pedal and refilling the MC way before it gets empty.

Can I coat the threads of the bleeder screw with some heavy grease as long as I don't get it in the fluid hole to possibly help test this theory?

TIA

 

[turbofrank]

I've used it for years and never a problem.

 

[zam70]

what kind of bleeder are you useing? If you're just using the tube in a bottle (no bleeding device) the bleeder fitting has to be closed BEFORE the pedal is let up. It goes like this -

(if you already know this, I apologize for the repetition)

You need 2 people
One operates the pedal, the other lays under the car at the wheel you're bleeding.
put the tube in a clear jar filled with enough brake fluid to submerge the tube and connect the tube to a bleeder.
pump up brakes the hold down.
crack open the bleeder - the pedal will drop.
with the pedal held dow, close bleeder.
repeat until there are no bubbles.

If you're using a bleeder pump (or one way fittings) maybe you have a bad one.

 

[turbofish38]

I assume you are talking about speed bleeders? I've been using them for years and never had a problem. One thing I do different is use the brake bleeding tool for a Mighty-Vac instead of pumping the pedal. Eric Fisher

 

[Roger]

I use my Boss (spouse) to pump the pedal. I use bleeders to "bench bleed" the master cylinder (in the car).

 

[topfuel]

I use vacuum brake bleeder almost every day, the bubbles you see in the clear hose are caused by air getting past the threads
on the bleeder screw (like you said), this is normal...
Leave the bleeder open after you pull off the hose, let it
gravity bleed on it's own before you tighten the bleeder.
If that doesn't help, bleed them manually.

Did you bench bleed the new master cylinder before you
installed it?

 

[Awesome T]

Yes, put grease around the bleeder screw, and this will prevent the air from being sucked in. Learned that from a friend years ago. HTH.