I just replaced part of the brake hard-line running to the rear proportioning valve because of a blowout. I then when on with the normal brake bleeding for the rear right caliper and was able to get the bubbles out. No fluid came out of the rear left. I then asked some knowledgeable people and they said that it was likely the caliper. When I went to replace the caliper and pulled the soft line off the old caliper, only a couple drops of fluid came out. What should I do next?
No fluid coming out of rear caliper.
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Funny.
First, try compressing the piston and then try to bleed again. If that doesn't work go forward to the next connection in the system and check for fluid. Once you find fluid tap the line all the way along to the problem caliper in an effort to break up the clog. Also remember that sof lines can collapse and totally jam up fluid flow.Comment
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We have been seeing a lot of clogged lines lately on e30's. The rubber is disintegrating and the pieces are stopping them up. One was so bad, compressed air nor hydraulic pressure wouldn't release them, hard lines needed replaced.Comment
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The proportioning valve feeds both sides, the front aft hydraulic line is a single tube that runs from the valve to the rear T-piece. The valve is located under the brake booster.
That isn't saying the valve couldn't do with being replaced if it's the original but it wouldn't be the cause of 1 caliper not getting fluid.
What do your hard lines look like on that side ? Particularly the line off the T-piece, they can corrode from the inside and block the tube.Comment

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