![]() ![]() ![]() Crack open a bleeder on the 1/2 of the sysem that was getting good flow while trying to bleed. If the light is on, then the valve is not centered. The terminal is the ground for the light. Attach a test light to the warning light terminal on the valve. To center the valve the thing to do is this: Close the bleeder on the part of the system that is not getting good flow. Either the pin would not push in, or it was too hard to get to to even try. Some instructions say to push the pin in to center the valve, or attach a special clip to hold it there. ![]() When the valve gets off center the system will never bleed correctly. The GM combo valve seems to confuse lots of people when bleeding. is there something special to bleeding the rear brakes with the original proportioning valve that I have installed? the old proportioning valve seems like a nuisance anyway. Can anyone think of anything I can do to try to fix my issue with the other valve before swapping this out or should I just go ahead and do it. Now, I bought this new proportioning valve that purposely does not have this metering valve to let you know that the brakes are leaking and it is for the disc/drum set up. This is the first time I have installed this kind of proportioning valve (the one that is installed right now) on an older vehicle so it is new territory for me. Is this normal with this kind of proportioning valve?. When I go to bleed the brakes they are not stiffening up the way they should be, they are still spongy (but am getting a steady flow of fluid from the lines with no air present), but a great deal better than what they were before I bled them. I have tried resetting it and also note that I do not have any leaks at this time from any of the lines (nothing is wet anywhere. This thing continuously leaks from this nipple, not by much, but enough for me to get about a drop from it at least every hour or so. I understand if there is a line leaking from one of the two outlets it pushes the piston of the metering valve on the proportioning valve off center and then starts leaking out of the nipple on the front. I have a GM proportioning valve for Disc/Drum setup with a metering valve that leaks when I bleed the brakes. I have been researching this for about 2 hours now and still can't find my answer. ![]()
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