quick bleeders

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quick bleeders

Unread post by toadboy65 » Tue Jan 09, 2018 8:01 pm

After struggling all day to properly bleed the brakes in my 1966 convertible, I have been considering some of those one-way speed bleeders. Has anyone used these, and is there a preferred brand? Also, it would be helpful to know the thread sizes. I really don't want to pull those bleeders to thread check them.
Thanks in advance- Toad

Jerry Whitt
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Re: quick bleeders

Unread post by Jerry Whitt » Tue Jan 09, 2018 8:58 pm

There are two basic styles. One is a high pressure device that is used through the top of the master cylinder. It uses high air pressure to push fluid through the system. This system involves a tank with rubber diaphragm and fluid above the diaphragm that is pressured through the bottom of the tank. Usually cost is quite a bit more than the hand held device.

The second is a hand held vacuum device that lowers pressure at the wheel cylinder and then allows atomospheric pressure push the fluid through the system.

Both systems work well. The hand held device can be purchased at most auto parts stores, $30 to $ 40.

Using the hand held, (or the high pressure), start at the wheel furthest from the master cylinder. Most Corvair vehicles this will be the passenger side rear.Raise the vehicle to a comfortable working height. Check the master cylinder to make sure it is full. The Master cylinder lid should be lying on the top of the master, but not latched. Attach the hose from the hand held device to the bleed screw. Loosen the screw about 1 turn. Pump the handle of the device. Fluid will gather in the attached clear cup. Pump several times, until no air bubbles are seen coming into the clear cup. Go check the master again to be sure it is still full.

Now move to the next furthest wheel from the master cylinder. Usually this is the drivers side rear wheel. Pump again until no bubbles are seen in the plastic cup. Once again, check fluid level in master cylinder, and add as needed.

Now the passenger side front wheel. Same process. Check fluid level in master cylinder again.

Finally, move to the drivers side front wheel and repeat the now familiar process. Once again, check the fluid level. When done, latch the master cylinder lid.

Jerry Whitt
Hemet, Callifornia
65 Monza, purchased new
65 Corsa convertible

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Re: quick bleeders

Unread post by azdave » Wed Jan 10, 2018 9:27 am

I've used speed bleeders but didn't feel it was that much easier than just placing a hose on the stock bleeder tip and letting the fluid drain into a bottle to flush the system. When I bleed brakes, I don't pump the pedal like a mad man so I usually don't have an issue pulling air back into the wheel cylinder while the bleeder screw is loosened.

I use a helper to bleed. When no one is around I have adapted an air cylinder to simulate someone pressing the gas, brake or clutch while I am under the car. Video below show me working on a clutch issue using my pneumatic helper.

Dave W. located in Gilbert, AZ
66 Corsa 140 4-speed w/factory A/C
66 Corsa 140 4-speed w/factory A/C
66 Corsa 140 4-speed
65 Corsa 140 4-speed
66 Corsa 455 Toro V8
65 Monza 455 Toro V8
65 Monza 4DR 140 PG w/factory A/C
65 Monza 4DR EJ20T w/5-speed

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Re: quick bleeders

Unread post by acarlson » Wed Jan 10, 2018 11:29 am

I tried the speed bleeders which Clark's sells. They were expensive and not worth it. One of them was defective and I ended up with brake fluid all over the floor - made a mess !!! I still have 4 of them if you want them. I went back to a $7 bleeder - basically a container with a magnet to hold it in place and a hose to connect to the bleeder valve. Worked just fine. You could even make one but for the price I'm not sure it's worth the effort...

1965 Regal Red Corsa 4 Speed Turbo Convertible

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Re: quick bleeders

Unread post by 66vairguy » Wed Jan 10, 2018 1:33 pm

Jerry was referring to "Power Bleeders" which are not the speed bleeders others posted.

I've installed all new brake parts, including new lines in four vehicle and with a "dry" system the ol' pumping the pedal is NOT going to work. You have to flow fluid long enough to move air out of the high spots (one pedal pump just moves the air a little, you stop and the air goes back to the high spot).

I did use the MC pressure units, until I had one blow out the rear seal of a new MC - WHAT A MESS inside the car. If you use this type I would NOT exceed 5PSI.

Now I use a vacuum unit moved to each wheel cylinder, but the bleeder valves tend to allow in air where the hose goes on so the stream always shows air bubbles. You need a reservoir refill bottle sitting in the MC to make sure you don't run it dry.

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Re: quick bleeders

Unread post by 64powerglide » Wed Jan 10, 2018 6:12 pm

I just let gravity do the work, open the bleeder, put a clear vinyl hose on the bleeder & put the hose in a jar. Keep the master cylinder full, when the bubbles stop coming close the bleeder & move on to the next one. If you don't think it will work just ask the guy coming at my in a 4WD pickup & made a left turn in front of me. I didn't think a Corvair could stop that fast!!!!!!! :eek:
64Powerglide, Jeff Phillips

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Re: quick bleeders

Unread post by toadboy65 » Wed Jan 10, 2018 7:13 pm

Thank you all for the detailed advice. One of my issues has been doing the work solo, which has been pretty frustrating for me. The convertible had been parked for a decade or so, and I have gotten a bunch of air out of the system. But it does seem like I can get maybe 90% bled, then some fumble with the wrench or hose sets me back.
I don't remember it being so much trouble when I was 20.

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