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| voxace |
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Quick one...
What's the proper procedure to completley flush the brake fluid when your car is equippied with ABS. I've bled my brakes a few times, but obviously there's going to be some of the crap still left in the ABS system. Cheers. |
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| Disco Frank |
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same as normal
to flush/bleed brakes on a abs car is no different to a non abs car 
to flush remove around 80% of fluid from the master cylider resevoir. then start bleeding brakes from the passenger side right wheel first then drivers side rear, drivers side front then finally passenger side front. keep bleeding untill the new fluid comes through and make sure u dont let the fluid level get to low piss easy
_________________ RIP SCOTT |
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| Evil Au tonner |
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check a workshop manual if it has a bleeding sequence because when you bleed the system the pedal feels spoungy if it isnt the correct sequence
_________________ To be old and wise you first have to be young and stupid |
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| voxace |
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Frank, that's how I do do it lol.
But I don't see how the fluid in the ABS system is being removed 
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| Disco Frank |
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voxace wrote: Frank, that's how I do do it lol. But I don't see how the fluid in the ABS system is being removed ummm for brakes to work the fluid goes abs cars master cylinder --> abs unit ---> brake calipers non abs cars master cylinder ---> brake calipers Quote: check a workshop manual if it has a bleeding sequence because when you bleed the system the pedal feels spoungy if it isnt the correct sequence
the pedal will feel spongy if there is air in the sytem not the bleeding sequence
_________________ RIP SCOTT |
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| Evil Au tonner |
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we had a car come into work we did front and rear brakes changed brake fluid no brakes kept trying read the book did the specified bleed sequence brakes worked so it does matter on most cars
_________________ To be old and wise you first have to be young and stupid |
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| voxace |
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I thought that the ABS unit had it's own internal resovoir that is opened when the ABS is used.
IE, most of the time brake fluid bypasses it, until the ABS kicks in and the old stuff mixes in with the rest. Not sure though.... |
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| madmax |
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voxace wrote: I thought that the ABS unit had it's own internal resovoir that is opened when the ABS is used.
IE, most of the time brake fluid bypasses it, until the ABS kicks in and the old stuff mixes in with the rest. Not sure though.... I don't know where you could get that idea, my understanding is the ABS control unit cuts the pressure/flow to the locking wheel/s as determined by the sensors, I don't see it needing a seperate reservoir, I could be wrong, just my limited understanding of the system.
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| Happy |
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Put simply the ABS unit is just a set of valves inbetween your normal resovoir and the brake caliper. If you put new fluid in the top and bleed the system until that fluid comes out at each wheel, you will have fresh fluid throughout your entire brake system.
_________________ Owning 1 of 67612 EF GLi Sedans made
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| Disco Frank |
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voxace wrote: I thought that the ABS unit had it's own internal resovoir that is opened when the ABS is used.
IE, most of the time brake fluid bypasses it, until the ABS kicks in and the old stuff mixes in with the rest. Not sure though.... no man the abs unit is inline with the brake lines from the master cylinder so with normal braking the fluid under pressure is pushed through the abs unit. it does not have a separte resivoir
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| voxace |
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Ahh that's cool then, just got the idea from some crap I was readin on some websites.
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| smally351 |
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The only time you will have trouble is if you ever remove the abs unit, or allow air to get into it by removing a line from it etc.
It is nearly impossible to get the air out of the accumulator without specialised test equipment that will operate the solenoids.
_________________ Real Cars have Chrome Bars |
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| Happy |
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smally351 wrote: The only time you will have trouble is if you ever remove the abs unit, or allow air to get into it by removing a line from it etc.
It is nearly impossible to get the air out of the accumulator without specialised test equipment that will operate the solenoids. I had plenty of air in mine - it got couriered over from vic to perth  and just flushing it through like Frank and I have described above will get all the air out!!!
_________________ Owning 1 of 67612 EF GLi Sedans made
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| madmax |
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voxace wrote: Ahh that's cool then, just got the idea from some crap I was readin on some websites.
You don't believe everything you read on websites do you??
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| voxace |
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Not this one lol. J/K.
I think the general idea I got was it depends on the system. My EB has a Bendix system in it, dunno what EF/EL/AU had??? Did they have Bosch units by then? But anyways, I have been bleeding it as per normal, and will continue to do it this way. Cheers. |
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