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#1
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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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--------------------------------------------------- Mercedes fanatic 1985 200D (w124) and totaled 190D |
#2
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Any chance the helper let the brake pedal back UP before you tightened the nipple ?
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#3
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Quote:
And now what can I do?
__________________
--------------------------------------------------- Mercedes fanatic 1985 200D (w124) and totaled 190D |
#4
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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.. |
#5
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Pretend it never happened and start the bleeding process all 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 |
#6
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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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Don't Chrome them; polish them |
#7
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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.. |
#8
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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?
__________________
--------------------------------------------------- Mercedes fanatic 1985 200D (w124) and totaled 190D |
#9
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Quote:
Confusing pump with up and you're back at square one
__________________
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 |
#10
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Quote:
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 |
#11
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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 |
#12
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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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1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket Tesla Model 3. 205,000 miles. Been to 48 states! Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels. 2014 Cadillac ELR 2013 Fiat 500E. |
#13
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Quote:
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 |
#14
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Quote:
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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1987 300D, arctic white/palomino--314,000 miles 1978 240D 4-speed, Euro Delivery, light ivory/bamboo--370,000 miles 2005 Jeep Liberty CRD Limited, light khaki/slate--140,000 miles 2018 Chevy Cruze diesel, 6-speed manual, satin steel metallic/kalahari--19,000 miles 1982 Peugeot 505 diesel, 4-speed manual, blue/blue, 130,000 miles 1995 S320, black/parchment--34,000 miles (Dad's car) |
#15
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Quote:
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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