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Brake Bleeding Fruistration...any advice? #732784
06/24/10 01:45 PM
06/24/10 01:45 PM
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Dodge Don Offline OP
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I am trying to bleed my brake system...all new wheel cylinders, lines, hoses and the Master Cylinder was rebuilt. The system was completely dry.

I bench bled the MC..the front bowl had alot of bubbles but the rear didn't do much of anything. Installed MC on car and then tried vacuul bleeding the RR...hose jumped off and rewarded me with a shower of brake fluid.

So I tried the gravity bleed...again started at RR...saw a few bubbles at first but then nothing however fluid on front bowl of MC kept going down and refilled over and over...the bottle at RR had more fluid then I began with so I moved to LR...not much happened there. Tried RF and got nothing...the rear bowl isn't draining.

I'm this close to letting the shop do it.

Was thinking I could try the two person method this weekend with my son pushing the pedal down with MC cap on and then open a bleeder...then close bleeder and tell him to let the pedal up and do again...periodically refilling MC.

Any suggestions? Pretty frustrated.

Re: Brake Bleeding Fruistration...any advice? [Re: Dodge Don] #732785
06/24/10 01:52 PM
06/24/10 01:52 PM
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weymouth,mass.
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meepmeep70 Offline
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when i did my runner,all new everything,i put small clear hoses on all bleeders(bleeders open)master caps off hoses into small jars and let gravity work all bleeders at the same time,keep an eye on the master so i doesn't run dry,may take a few hours,have a couple beers while waiting,it will work.after i had all clear fluid no bubbles out of all lines i closed them,i finished by very very slowly pushing pedal down over and over with master caps off,no bubbles cap master pedal should be good

Re: Brake Bleeding Fruistration...any advice? [Re: meepmeep70] #732786
06/24/10 02:06 PM
06/24/10 02:06 PM
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Dodge Don Offline OP
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So you are saying do all 4 at same time? not one by one?

When each is fully bled should each clear hose be full of brake fluid?

Re: Brake Bleeding Fruistration...any advice? [Re: meepmeep70] #732787
06/24/10 02:13 PM
06/24/10 02:13 PM
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Anchorage,AK
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AK_JH27 Offline
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I'm having a simliar problem, i cant seem to get my brakes bleed. I cant remember, having the bleeder screw above the brake line is better or below on the capilier? I have just converted to rear disks and i thing this is the problem, my bleeder screw is below the line.

Re: Brake Bleeding Fruistration...any advice? [Re: AK_JH27] #732788
06/24/10 02:27 PM
06/24/10 02:27 PM
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Dodge Don Offline OP
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My understanding is that the bleeders must be below the level of the MC for gravity bleeding to work.

Re: Brake Bleeding Fruistration...any advice? [Re: Dodge Don] #732789
06/24/10 02:42 PM
06/24/10 02:42 PM
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RTSE4ME Offline
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When I have problem with bleeding brakes this is what I do.

Plug both ports on master The MC is fully bled out when you can no longer stroke the MC piston inward more than about a ¼” as the fluid simply has nowhere to go and fluid will not compress.

IF you have a rock hard pedal with the MC ports plugged, then you can consider the MC OK and should next only reconnect the front brake circuit. If the pedal is still good and firm with only the front brakes connected, then you know that the MC and front brakes are not the problem. Next, reconnect the rear brake circuit and see how the brake pedal feels – if it has gone into a bad state, then you have at least isolated the problem to the rear brake circuit (which is usually the case).

Re: Brake Bleeding Fruistration...any advice? [Re: Dodge Don] #732790
06/24/10 02:51 PM
06/24/10 02:51 PM
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Wisconsin
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Aero426 Offline
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Quote:


Was thinking I could try the two person method this weekend with my son pushing the pedal down with MC cap on and then open a bleeder...then close bleeder and tell him to let the pedal up and do again...periodically refilling MC.





After bench bleeding the master cylinder, the above procedure is the way to go.

Also, there is a nice product called a Speed Bleeder which allows one person bleeding. It is a bleeder screw with an internal check ball that you open 1/4 to 1/2 turn. It eliminates the need to close the bleeder screw when the pedal is released. You then pump fluid through by the brake pedal through the hose into your waste jar. They are about $8 each.

www.speedbleeder.com

Re: Brake Bleeding Fruistration...any advice? [Re: Aero426] #732791
06/24/10 03:28 PM
06/24/10 03:28 PM
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Florida
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mopar346 Offline
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Bleeder should be at the top of w/cyl or cal above line and below the m/c. If you are by yourself, gravity is the way to bleed an empty system. If I have someone with me I will literally remove the RR bleeder and use my finger over the hole. Have them slowly push it down and then close the hole with your finger and have them let it up, repeat until I get good fluid, go LR repeat, RF repeat, and LF repeat. If I am not happy with the pedal at that point, I have them pump it up and crack the bleeder until I get all the air out.


Careful, your character's showing!
Re: Brake Bleeding Fruistration...any advice? [Re: Dodge Don] #732792
06/24/10 04:31 PM
06/24/10 04:31 PM
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Pinelands , NJ
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joelson6 Offline
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ok guys, here's what i did with the restoration on my Challenger.

after i attached all the brake lines in my challenger. i filled the MC with brake fluid, yes, i didn't bench bleed it. slowly pumped the pedal about 3 or 4 times, refilled the MC and let it set for 3 days. went back, made sure the level was correct in the MC, then connected one of those hand vacuum pumps to the wheel cylinders starting at the RR, LR, RF, LF, just slowly pulling brake fluid into the reservoir. each time making sure the level was correct in the MC. then i left it for 3 more days. when i went back, the brakes were perfect. i have drums all the way around and it didn't even pull a little bit.

if you can, let it sit. the air bubbles will work themselves out.

Re: Brake Bleeding Fruistration...any advice? [Re: joelson6] #732793
06/24/10 04:39 PM
06/24/10 04:39 PM
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Dodge Don Offline OP
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Quote:

ok guys, here's what i did with the restoration on my Challenger.

after i attached all the brake lines in my challenger. i filled the MC with brake fluid, yes, i didn't bench bleed it. slowly pumped the pedal about 3 or 4 times, refilled the MC and let it set for 3 days. went back, made sure the level was correct in the MC, then connected one of those hand vacuum pumps to the wheel cylinders starting at the RR, LR, RF, LF, just slowly pulling brake fluid into the reservoir. each time making sure the level was correct in the MC. then i left it for 3 more days. when i went back, the brakes were perfect. i have drums all the way around and it didn't even pull a little bit.

if you can, let it sit. the air bubbles will work themselves out.




On the hand held vacuum pump method (the one you squeeze to create vacuum and draw fluid). I'm assuming you used the jar. I have one but the directions suck.

I put one hose from hand pump to jar lid...one small hose from lid into jar...and one hose from other end of jar cap to bleeder valve. Now what?

Do I add fluid in the jar? Do I leave the bleeder open while I pump...or create vacuum then open bleeder then close and on and on? Is the MC lid on or off when vacuum bleeding?

Re: Brake Bleeding Fruistration...any advice? [Re: Dodge Don] #732794
06/24/10 05:32 PM
06/24/10 05:32 PM
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Florida
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scratchnfotraction Offline
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put a little fluid in the jar so the end of the tube is under the fluid level so it wont suck air back IIRC

Re: Brake Bleeding Fruistration...any advice? [Re: Dodge Don] #732795
06/24/10 05:33 PM
06/24/10 05:33 PM
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Irving, TX
feets Offline
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Leave the MC open, put the vacuum line on the loosened bleeder, and pump to your hearts content.

You do not need fluid in the bottle for it to work.


We are brothers and sisters doing time on the planet for better or worse. I'll take the better, if you don't mind.
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Re: Brake Bleeding Fruistration...any advice? [Re: feets] #732796
06/24/10 05:57 PM
06/24/10 05:57 PM
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Grand Prairie,Texas
stumpy Offline
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Yeah, they won't gravity bleed with the lid on the master. DAMHIK

Re: Brake Bleeding Fruistration...any advice? [Re: feets] #732797
06/24/10 05:58 PM
06/24/10 05:58 PM
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Florida
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scratchnfotraction Offline
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oh,maybe its fluid in the jar with hose as a one man bleeder

pump bubbles in the fluid and keeps air from going back in the bleeder valve maybe

jar on ground with fluid 1/2 full,hose from bleeder to jar and then pump till no more air bubbles


Re: Brake Bleeding Fruistration...any advice? [Re: scratchnfotraction] #732798
06/24/10 06:07 PM
06/24/10 06:07 PM
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Dodge Don Offline OP
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I don't get how you can create vacuum with fluid in the jar and the hose in the fluid.

And yes I understand for gravity bleeding you need the MC cap off. So for vacuum bleeding I keep the cap off as well then.

Re: Brake Bleeding Fruistration...any advice? [Re: Dodge Don] #732799
06/24/10 06:10 PM
06/24/10 06:10 PM
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Grand Prairie,Texas
stumpy Offline
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When you press the pedal it forces the air out and The hose in the jar sucks fluid back up when the pedal is realeased to keep air from reentering the hose and wheel cylinder.

Re: Brake Bleeding Fruistration...any advice? [Re: stumpy] #732800
06/24/10 06:23 PM
06/24/10 06:23 PM
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Dodge Don Offline OP
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Yes I get that.

Like to focus on the vacuum method right now...exactly how to use it.

Re: Brake Bleeding Fruistration...any advice? [Re: stumpy] #732801
06/24/10 06:26 PM
06/24/10 06:26 PM
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Conway, SC
T2R9 Offline
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With Stumpy. I use a jar partially filled so the hose is in the fluid, I will also put a dab of silicone on the bleeder threads as they will suck air when loosened. I start at the right rear, couple of pumps, close the bleeder, then move to the LR, then RF, LF, Repeat. Top off the master after each wheel. Takes about three trips around the car to get a solid pedal. Been doing it this way for years by myself and works great.

Re: Brake Bleeding Fruistration...any advice? [Re: T2R9] #732802
06/24/10 06:31 PM
06/24/10 06:31 PM
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Grand Prairie,Texas
stumpy Offline
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The vacuum method is just hooking a hand vacuum pump(mighty vac) to the open bleeder and start pumping until no more air comes out with the fluid. Just be sure to keep the master filled. When you stop pumping to refill the master close the bleeder.

Re: Brake Bleeding Fruistration...any advice? [Re: stumpy] #732803
06/24/10 07:08 PM
06/24/10 07:08 PM
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Dodge Don Offline OP
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Quote:

The vacuum method is just hooking a hand vacuum pump(mighty vac) to the open bleeder and start pumping until no more air comes out with the fluid. Just be sure to keep the master filled. When you stop pumping to refill the master close the bleeder.




Are you saying just connect the hand vacuum pump directly up to the bleeder without a jar in the middle? Wouldn't that ruin the pump when the fluid comes out?

How about this..would this be right...

- Fill MC and leave cap off
- Hook up vacuum pump hose to jar cap
- Hook up short hose bottom of jar cap into a couple of inches of fluid
- Hook up other hose from jar cap to bleeder
- open bleeder and start pumping until no more bubbles in fluid in jar and hose to bleeder is full of fluid
- close bleeder and move on to next wheel

Is that right?

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