Quote:
Originally Posted by Jimbro727
Thank you so much for the replies.
The residual pressure valve makes a lot of sense, but if I'm understanding you correctly, wouldn't the symptoms occur on both sides of the rear brakes? I get solid fluid out of the passenger side, this is only occurring on the driver's side. Could it still be the residual pressure valve? It is a disc/drum setup by the way.
I'd also like to mention that the bubbles happen instantly after switching from the pressure bleeder to the two man method. If there was air somewhere being forced into the system due to the two man system (combination valve, leak, M/C), wouldn't we get solid fluid for at least a few pumps, and then some bubbles? The bubbles happen instantly, which makes no sense. Taking this into account, the only possibility would be that the bleeder is letting air in, but only under the amount of pressure created by the 2-man method, and not by the 10psi or so created by the pressure bleeder. Does that logic make sense?
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It is very possible that one wheel cylinder is sealing better than the other. I would be willing to bet that that's how all that air is getting in. And that is why you are only getting the bubbles on one side, instantly. If the leak were somewhere else, the bubbles would take longer to appear. I think at this point I would replace the cylinder on the side with lots of bubbles with a good one from NAPA. And yes, I think a lack of a residual pressure valve could still be a factor too.
What is happening is you are sucking air through your driver's side wheel cylinder. There is no doubt about that from what you have described. It is either being caused by a faulty wheel cylinder, lack of a functioning residual pressure valve, or both. As I said before, the first thing I would try would be a new wheel cylinder on the driver's side. If the problem remains, add a 10lb residual pressure valve to the line to the rear. I would NOT use the 2-man method to bleed the brakes, because you risk damaging the seals in the master cylinder, and it is just a major PITA. Power bleed or gravity only. I only use gravity.