Problem bleeding rear brakes on 98 AWD V70
#1
12-02-2014 | 08:11 AM
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Problem bleeding rear brakes on 98 AWD V70
Hi All, I'm running into a problem bleeding the rear brakes on my 98 AWD V70. As part of a routine pad and rotor replacement of the rears, I noticed that the boot was broken on the left rear caliper so I replaced it through advance auto. After putting it all back together, I now find that I can't get either rear caliper to bleed clear fluid, it's mostly air. I'm using the one man bleeder kit with the small bottle with magnet attached(used many times before with success). I do get a small amount of fluid but each time I pump the brakes it mostly blows air bubbles in the collector bottle, like blowing in a straw in a cup of water.
This happens when bleeding BOTH rear calipers. I don't have this problem with the fronts, they bleed fine. On the caliper that I replaced I have tightened the line to the point now where I feel I'll break something if I tighten it much more. I've also tried grease around the bleeder screw to seal an possible leaks that would be bringing in air. I've also made sure the master cylinder is always topped off. I've retried this for hours and must have pumped the brakes a few hundred times by now. There were no other issues with the brakes prior to me doing this work.
I'm stumped, if anybody has any advice I'd be glad to hear it.
This happens when bleeding BOTH rear calipers. I don't have this problem with the fronts, they bleed fine. On the caliper that I replaced I have tightened the line to the point now where I feel I'll break something if I tighten it much more. I've also tried grease around the bleeder screw to seal an possible leaks that would be bringing in air. I've also made sure the master cylinder is always topped off. I've retried this for hours and must have pumped the brakes a few hundred times by now. There were no other issues with the brakes prior to me doing this work.
I'm stumped, if anybody has any advice I'd be glad to hear it.
Last edited by ptaylor01; 12-02-2014 at 08:15 AM. Reason: adding more information
#2
12-21-2014 | 05:27 PM
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Joined: Dec 2014
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Just in case
I'm sure you have figured it out by now, so I thought I would share some success in this I've had.
I know how frustrating it can be to bleed brakes with air getting in the lines. I have had success over the years with the Mity Max, two person method (one person pumping the pedal and one on the ground), pneumatic tools, etc. I've also had issues with all these things too.
I just bought a Motive Power Bleeder Model 1109, WOW! It works! I recommend it.
The rear calipers on my 98' are opposing 2 piston (1 on each side) split in halves. Did you have this type also? Did you rebuild the calipers yourself or buy rebuilt?
If you rebuilt them, there are two small seals between the two halves that are commonly left out of the rebuild kits.
The kit on the left is ATE ($40), the right, Orielly's #15174 ($6)
I know how frustrating it can be to bleed brakes with air getting in the lines. I have had success over the years with the Mity Max, two person method (one person pumping the pedal and one on the ground), pneumatic tools, etc. I've also had issues with all these things too.
I just bought a Motive Power Bleeder Model 1109, WOW! It works! I recommend it.
The rear calipers on my 98' are opposing 2 piston (1 on each side) split in halves. Did you have this type also? Did you rebuild the calipers yourself or buy rebuilt?
If you rebuilt them, there are two small seals between the two halves that are commonly left out of the rebuild kits.
The kit on the left is ATE ($40), the right, Orielly's #15174 ($6)
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