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  #1  
Old 04-10-2009, 12:07 PM
mouramen's Avatar
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Location: Portugal
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need help bleeding brakes...ASAP

Hi guys,

Decided to change the brake fluid today:
Started at the rear left wheel.
Topped the fluid to MAX.
My helper started pressing the brakes several times and the old fluid started to come out the transparent tupe I inserted on the nipple into a bottle.
So far so good...

I was waiting that new fluid would start to come out but now only air comes out...sometimes fluid...

What gives guys??

The fluid in the resevoir is at the middle of MIN and MAX!

Please help!

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  #2  
Old 04-10-2009, 12:27 PM
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Any chance the helper let the brake pedal back UP before you tightened the nipple ?
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  #3  
Old 04-10-2009, 12:30 PM
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Quote:
Originally Posted by leathermang View Post
Any chance the helper let the brake pedal back UP before you tightened the nipple ?
I think that's exactly what happened...

And now what can I do?
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  #4  
Old 04-10-2009, 12:37 PM
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I am psychic !!!

LOL,
No harm done...
you just start over making sure you have fluid in the ' tank' up front..
and agree with your helper that they pump a little until they feel some pressure, keep their foot on the pedal while it goes down due to you opening the nipple...
YOU close the nipple before the stream of juice stops... and yell, PUMP...
then they are allowed to let the brake peddle UP...and start gently pumping again..
so you always give them permission before they let the pedal up.. that is the trick..
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  #5  
Old 04-10-2009, 12:38 PM
Inna-propriate-da-vida
 
Join Date: May 2008
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Quote:
Originally Posted by mouramen View Post
I think that's exactly what happened...

And now what can I do?

Pretend it never happened and start the bleeding process all over.
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On some nights I still believe that a car with the fuel gauge on empty can run about fifty more miles if you have the right music very loud on the radio. - HST

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  #6  
Old 04-10-2009, 12:39 PM
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Start with the Right Rear (farthest from the MC). Once the level in the MC reaches half, put new fluid in to avoid introducing air. And put a piece of wood such as a 2x4 under the brake pedal to avoid pushing the MC seal completely out.
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  #7  
Old 04-10-2009, 12:40 PM
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Using the clear catcher bottle is nice... you can examine the stuff coming out... and not spray it on you hopefully...
but unless you have one of those one way bleeder valves attached ( which I have never seen work great )... you have to be in charge of the ' gate' nipple....
and it must be a one way function... fluid coming down and out..
and fluid being replaced from the ' tank' at the master cylinder...
if you mess up and let the tank get low then that is the same thing as letting air in from the bottom... you just start over following the rules and it will work out..
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  #8  
Old 04-10-2009, 12:44 PM
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But there is no pressure on the pedal now, it sinks easly...
I'm doing the procedure with the engine turned off, is this right?
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  #9  
Old 04-10-2009, 12:47 PM
Inna-propriate-da-vida
 
Join Date: May 2008
Posts: 1,969
Quote:
Originally Posted by leathermang View Post
I am psychic !!!

LOL,
No harm done...
you just start over making sure you have fluid in the ' tank' up front..
and agree with your helper that they pump a little until they feel some pressure, keep their foot on the pedal while it goes down due to you opening the nipple...
YOU close the nipple before the stream of juice stops... and yell, PUMP...
then they are allowed to let the brake peddle UP...and start gently pumping again..
so you always give them permission before they let the pedal up.. that is the trick..
I've always used DOWN and UP. Distinctly different sounds, and words that even a young helper knows pretty well.

Confusing pump with up and you're back at square one
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On some nights I still believe that a car with the fuel gauge on empty can run about fifty more miles if you have the right music very loud on the radio. - HST

1983 300SD - 305000
1984 Toyota Landcruiser - 190000
1994 GMC Jimmy - 203000

https://media.giphy.com/media/X3nnss8PAj5aU/giphy.gif
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  #10  
Old 04-10-2009, 12:49 PM
Inna-propriate-da-vida
 
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Quote:
Originally Posted by mouramen View Post
But there is no pressure on the pedal now, it sinks easly...
I'm doing the procedure with the engine turned off, is this right?
yep, engine off.
just pump it up till you get a little pedal, and start the bleeding over
__________________
On some nights I still believe that a car with the fuel gauge on empty can run about fifty more miles if you have the right music very loud on the radio. - HST

1983 300SD - 305000
1984 Toyota Landcruiser - 190000
1994 GMC Jimmy - 203000

https://media.giphy.com/media/X3nnss8PAj5aU/giphy.gif
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  #11  
Old 04-10-2009, 12:51 PM
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LOL,
I do not have to tell them they need to pump....as I have properly instructed them that THAT IS there job...
So I just say OK when they can pump.... and to pump they already know they must let the pedal UP... so I do not need to tell them that...
But if you get a really dense helper, which happens sometimes, you may need to call out every command..
LOL
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  #12  
Old 04-10-2009, 12:53 PM
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If you can get a longer line and put it in a container with some brake fluid (an old brake fluid bottle works good) you can just press the pedal over and over without closing the bleeder: it will just suck back on the fluid in the container. For the final bleed close the valve, have your helper press the pedal hard, then open and close the bleeder really quick to give a quick burst of fluid.

-Jason
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  #13  
Old 04-10-2009, 12:54 PM
Inna-propriate-da-vida
 
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Quote:
Originally Posted by leathermang View Post
LOL,
I do not have to tell them they need to pump....as I have properly instructed them that THAT IS there job...
So I just say OK when they can pump.... and to pump they already know they must let the pedal UP... so I do not need to tell them that...
But if you get a really dense helper, which happens sometimes, you may need to call out every command..
LOL

I try not to find out how dense the helper is, might say something that gets me no helper
__________________
On some nights I still believe that a car with the fuel gauge on empty can run about fifty more miles if you have the right music very loud on the radio. - HST

1983 300SD - 305000
1984 Toyota Landcruiser - 190000
1994 GMC Jimmy - 203000

https://media.giphy.com/media/X3nnss8PAj5aU/giphy.gif
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  #14  
Old 04-10-2009, 12:55 PM
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Quote:
Originally Posted by mouramen View Post
But there is no pressure on the pedal now, it sinks easly...
I'm doing the procedure with the engine turned off, is this right?
Yes, engine off. Does it build any pressure if you pump it a few times quickly (with bleeder closed)?

I ended up investing in a power bleeder for this job ... took a lot of the puzzle out of it. Without one I think the big key is not letting up the pedal while you have the bleeder open. Pump, pump pump pump pump, hold down pedal, open bleeder, let fluid out, close bleeder ... pump pump pump, etc.
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  #15  
Old 04-10-2009, 12:56 PM
Inna-propriate-da-vida
 
Join Date: May 2008
Posts: 1,969
Quote:
Originally Posted by compu_85 View Post
If you can get a longer line and put it in a container with some brake fluid (an old brake fluid bottle works good) you can just press the pedal over and over without closing the bleeder: it will just suck back on the fluid in the container. For the final bleed close the valve, have your helper press the pedal hard, then open and close the bleeder really quick to give a quick burst of fluid.
-Jason

How would that achieve a brake bleed? Seems like all you would be doing is giving some of your fluid a little visit to the outside.

Personally, whenever I am bleeding brakes, I replace all the fluid. Does not cost much, and you are already set up for it.

__________________
On some nights I still believe that a car with the fuel gauge on empty can run about fifty more miles if you have the right music very loud on the radio. - HST

1983 300SD - 305000
1984 Toyota Landcruiser - 190000
1994 GMC Jimmy - 203000

https://media.giphy.com/media/X3nnss8PAj5aU/giphy.gif
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