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No brake fluid in one caliper


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#1 TOMsGPTurbo

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Posted 23 August 2012 - 11:49 PM

Hey guys,

I was bleeding my brakes tonight and my rear left (Passenger side not drivers side) is getting no brake fluid coming out of the nozzle.
I unscrewed the whole nozzle and didn't make a difference.
Is there a specific way to diagnose and fix the problem quickly?

Cheers,
Tom.

Edited by TOMsGPTurbo, 23 August 2012 - 11:49 PM.


#2 thunderleg

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Posted 24 August 2012 - 01:02 AM

QUOTE (TOMsGPTurbo @ 23 Aug 2012, 09:49 PM) <{POST_SNAPBACK}>
Hey guys,

I was bleeding my brakes tonight and my rear left (Passenger side not drivers side) is getting no brake fluid coming out of the nozzle.
I unscrewed the whole nozzle and didn't make a difference.
Is there a specific way to diagnose and fix the problem quickly?

Cheers,
Tom.


Sounds like the bleed port is blocked. Take the nozzle out and push down on the pedal hard to see if you can clear it. Put rag over the hole in case it squirts ohmy.gif .

#3 fearlesss

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Posted 24 August 2012 - 10:38 AM

It could be that although it could also be your proportioning valve as well. I've had about 3 go over the years.



Looks like that. basically, one line goes from your Brake master cylinder to this which splits it up into the 4 corners of your breaks.

Best way to test it out. Take of each break line one at a time, Give the break peddle a little squeeze and check if some fluid comes out smile.gif



#4 TOMsGPTurbo

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Posted 24 August 2012 - 06:55 PM

QUOTE (thunderleg @ 24 Aug 2012, 01:02 AM) <{POST_SNAPBACK}>
Sounds like the bleed port is blocked. Take the nozzle out and push down on the pedal hard to see if you can clear it. Put rag over the hole in case it squirts ohmy.gif .


Thanks for the reply, I tried that last night but still no joy, I opened the value and had my wife jumping on the pedal and nothing happened.

QUOTE (fearlesss @ 24 Aug 2012, 10:38 AM) <{POST_SNAPBACK}>
It could be that although it could also be your proportioning valve as well. I've had about 3 go over the years.



Looks like that. basically, one line goes from your Brake master cylinder to this which splits it up into the 4 corners of your breaks.

Best way to test it out. Take of each break line one at a time, Give the break peddle a little squeeze and check if some fluid comes out smile.gif


Thanks for that, I'll give that a go.
I really hope that it's not a proportioning valve.

Edited by TOMsGPTurbo, 24 August 2012 - 07:01 PM.


#5 Brad

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Posted 24 August 2012 - 08:49 PM

just disconnect the flex line from the caliper that joins to the hardline, or crack the banjo bolt on the caliper where the flex line goes into it..
press the pedal , and if fluid comes out there , you know it's the caliper...

or another way to bleed the caliper is to take it off the disk , stick a piece of wood in it...
turn the caliper upside down so the flex line/banjo bolt it at the top , and bleed the air out from there...

#6 TOMsGPTurbo

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Posted 25 August 2012 - 07:52 PM

Thanks Brad, I'll give it a go during the week, found I have a spare proportioning valve thing in the spare car which i was about to bin

#7 TOMsGPTurbo

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Posted 28 August 2012 - 05:24 PM

I found that the line that goes into the Caliper is full of brake fluid, but the caliper seems to be stuck? I could pull the whole thing off and put it back on after pumping the pedal.
Seized caliper? is replacing the only way to go? (cheapest and quickest?)

#8 harold_88

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Posted 29 August 2012 - 01:49 PM

QUOTE (TOMsGPTurbo @ 28 Aug 2012, 05:24 PM) <{POST_SNAPBACK}>
I found that the line that goes into the Caliper is full of brake fluid, but the caliper seems to be stuck? I could pull the whole thing off and put it back on after pumping the pedal.
Seized caliper? is replacing the only way to go? (cheapest and quickest?)


replace or pull it all apart, or take it to a brake specialist if you dont have the time skills effort
edit: there is a toyota rebuild kit I have at home, i can dig up the part number for you


this is why bleeding brakes regularly is good, to stop the ingress of moisture to the fluid, corroding parts from the inside and siezing over time wink.gif



Edited by harold_88, 29 August 2012 - 01:49 PM.


#9 thunderleg

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Posted 29 August 2012 - 10:16 PM

QUOTE (TOMsGPTurbo @ 28 Aug 2012, 04:24 PM) <{POST_SNAPBACK}>
I found that the line that goes into the Caliper is full of brake fluid, but the caliper seems to be stuck? I could pull the whole thing off and put it back on after pumping the pedal.
Seized caliper? is replacing the only way to go? (cheapest and quickest?)


Take the caliper off and try using a g-clamp to free the piston up. You may be lucky, but it could start leaking shortly after it frees up. Worth a shot.

#10 Brad

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Posted 30 August 2012 - 07:16 PM

rear calipers are not pushed back with a g-clamp , they need to be turned back as the piston is threaded...

you can unscrew the piston all the way out and it comes past the seal , clean it up with a bit of wet and dry and screw it back in...



#11 TOMsGPTurbo

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Posted 30 August 2012 - 09:23 PM

Thanks guys, I'll play around with it and see what I can do.
Brad please excuse my ignorance, but what is wet and dry?

#12 Graham

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Posted 30 August 2012 - 10:08 PM

wet & dry = very fine grain sand paper - ie 1000 or 2000 grains per ?inch?

#13 thunderleg

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Posted 31 August 2012 - 12:47 AM

QUOTE (Brad @ 30 Aug 2012, 05:16 PM) <{POST_SNAPBACK}>
rear calipers are not pushed back with a g-clamp , they need to be turned back as the piston is threaded...

you can unscrew the piston all the way out and it comes past the seal , clean it up with a bit of wet and dry and screw it back in...



Whoops. Message to self - pay attention to detail!

#14 TOMsGPTurbo

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Posted 08 September 2012 - 02:38 PM

Good news, caliper is fine, I disconnected the hoses one by one and worked out I have a blockage, it's not a complete block as fluid was slowly seeping out, and I had more trouble with stuck nuts, I mangulated one nut getting it off.
Good news - not caliper
Bad news - clog is in hose which I'm having issues getting off!!




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