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Yikes, no brakes!!!
I finally got my car complete and have been going over everything to get it ready for the state inspection. The brake pedal was very spongy, so I decided to bleed the brakes. I bled the old two person way and with a vacuum pump. The brakes were worse than ever, pedal goes straight to the floor and will only gain pressure with pumping. Decided to replace the MC today and I did bench bleed it before install. I then bled every wheel, rr, lr, fr, fl. Same thing, no change. Ideas???
Please help, I need to have this solved very soon to not miss my inspection date!! |
Are all your calipers installed so the bleed screws are on top?
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I'm assuming from your post that you have one MC that supplies the front and rear brakes (is that accurate?). That being said, one should start the process with the brake cylinder or caliper furthest from the MC and work your way to the one closest. You didn't specify what type of brakes - some disc brake calipers have multiple bleed valves (i.e. Wilwood) you should use the ones on top for bleeding. This allows the caliper to fill completely.
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The brakes are the standard set up from B&B. The calipers do have the bleeder on top. The MC has two reserviors, one small for the rear and a larger for the front. Any ideas?
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Did you bleed the inside cylinders on the calipers?
Lowell |
Lowell - I must not have because I don't understand what you mean? Please explain
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Any other ideas out there? I assume I have air somewhere.
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Sounds like you have air in the system somewhere. If you can't isolate the front & rear (and have a single MC) get yourself a pedal pumper (I use my wife) and go through the process of bleeding each cylinder/caliper insuring that the MC reservoir doesn't go empty.
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Pgermond,I agree, the "old way" ,pumping the pedal never fails!
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Thanks guys, I guess I'll kep trying to bleed.
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Check your balance bar for being centered first of all (you can do the front to rear bias with an adjustable bias valve). Then make sure you are allowing the M/C piston to completely return to home. For now leave a little extra free pedal movement. Too chase problems leave a good 3/4 inch of free play on the pedal to ensure each master cylinder is returning to the home stop.
If M/C does not have enough free play it has a internal passage that never closes and no pedal pressure can be built just like problem you have now. Then re- bleed the heck out of system. good luck, it will be fine!! Jeff C |
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