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94 corsica cannot bleed brakes
01-03-2009, 10:50 PM
1994 corsica 3.1 long story short did a front brake job for a friend got done with the brake job and he had NO brakes. the gasket under the cap on the master cylinder was not the correct one and was torn up (dont know how it worked before) so bought a new one put on it. didnt help! thought maybe the calipers were messed up, and bleeders broke off when tried to bleed so bought and replaced with new ones, still have no brake pedal, all the way to the floor. bleed whole car, ABS and all 4 wheels, get very little if any fluid when trying to bleed the brakes. so i thought maybe take out all the bleeder screws and let alone for ohh 4 hours let it gravity bleed. no luck. still no brakes or pedals and no gravity feed. any suggestions please! might try to replace master cylinder tomorrow. or could the ABS be messed up? im stuck. never had this happen before.
01-04-2009, 09:14 PM
Look at the front calipers is the bleed screw on top if you put them on the wrong side the bleed screw will be on the bottom and you can't get the air out.
If your not getting fluid start at the two lines at the master cylinder. Bleed one at a time then go to the abs unit and bleed at this point progress until you get to the calipers. Sometimes you need a scan tool to bleed properly but you should get fluid anyway.
01-05-2009, 06:13 AM
ya the bleed screws are on top. and tried every thing yesterday. even put air throu the whole system thinking maybe some obstruction was in there. nope! still no brake fluid to each wheel. so i took the whole master cylinder and ABS off and goin to the salvage yard tomorrow to see how much a whole used unit will be. on Ebay there about $60. so hopefully that will fix the problem. Ya thinkin im gonna need to invest in a Scan Tool! cause it prob would have helped to reset the motors on the ABS. i dont know still has me stumped.
01-05-2009, 09:29 AM
I think you have air in the master cylinder. I use a squirt oil can with brake fluid in it. Use a new one with no oil rinse out with brake clean. Then fill with new fluid. Put a hose on it push over bleed screw pump slowly until fluid starts filling the master cylinder. Do all four wheels then try to bleed each wheel usually only requires one or two.
Put your master cylinder in a vise use the hoses and plastic fittings or make one out of scrap yard fittings. Use a large screw driver and pump until fluid returns to the master cylinder. Anyway the master cylinder has to pump before trying to bleed.
Some people use a vacuum pump with a bottle and fittings to collect fluid.
Any way you need fluid to the wheels before knowing if your going to need a scan tool.
01-06-2009, 07:38 AM
well..... bought a used master cylinder and ABS unit together from junk yard for $30 and put it on... had to tap on it with a dead blow hammer a little bit but it started working right away gravity feeding to all 4 tires. and now works great. still dont know what the problem was but thank u for all your help.
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