I just replaced all 4 calipers on my 73 vette. I bled the system just like chevy says to. The pedal is not very solid and it travels most of the way to the floor when the car is off. Once I start the car the pedal pressure almost completely goes away and I can push it all the way to the floor. The brakes do grab in the last approximately 1/2 inch of travel, but I know something isn't right. There are no leaks, I've looked everywhere I can think of and even after a ton of pedal pushes, the master is still full. It seems like it's air in the lines, but if it's in there I sure can't get it to come out. Anyone got any ideas?
2007-01-10 12:57:19 · 7 answers · asked by aeroscout261 1 in Cars & Transportation ➔ Maintenance & Repairs
You've got air. Did you replace the master cylinder as well? If you did, and didn't bleed it before installing it, there's very likely an air bubble in the master cylinder.
2007-01-10 13:01:41 · answer #1 · answered by Anonymous · 0⤊ 0⤋
i own a repair shop,and you may have a bad master cylinder on it,,usually Chevy is real easy to get the air out of,,there is one other method of doing this ,,that might help you,,and that is to gravity bleed them,,i been at this for 36 years,and have owned 2 of those cars,,and both of them did this,,i put a line ,,on the bleeder screw,,and opened it up,,and did them one at a time,,let the fluid run in to a clear cup,or bottle,you can re-use it,,do one at a time,,and this may give you a better pedal,,pump bleeding them just don't seem to work good when you have 4 wheel disc brakes ,try this,,it should give you a real good pedal,,just don't let the system go dry,,keep the master full on it,,and just barely open it up,,it takes a while to do it this way,,but it works,,good luck hope this help,s.
2007-01-10 13:11:05 · answer #2 · answered by dodge man 7 · 0⤊ 0⤋
Power bleed the brakes. You have air in the system and it will take a lot of pumping and bleeding and fluid to get it out, and if you don't do it in the correct sequence, you will be chasing bubbles all day. Whereas a power bleed done at a mechanics shop will do the job in seconds and problem solved.
2007-01-10 13:03:53 · answer #3 · answered by rex_rrracefab 6 · 0⤊ 0⤋
I had the same problem on a 69 vette and the mechanic worked for 2 days trying to figure out where the air was and finally he loosened the lines to the proportioning valve and that was where the air was stuck. good luck.
2007-01-10 13:10:14 · answer #4 · answered by mister ss 7 · 0⤊ 0⤋
I have a 1972 Corvette and did a brake job a while back. Dodge man's advice is the way to go. I do tihs all my cars when I have to bleed the brakes.
2007-01-10 13:17:16 · answer #5 · answered by notadeadbeat 5 · 0⤊ 0⤋
YES .. at this point you need to have some one assist or take the ride to a garage and get them to bleed the lines -- you've done the expensive part of the work.. pay for some help ____
2007-01-10 13:03:12 · answer #6 · answered by XTX 7 · 0⤊ 0⤋
If your doing this by yourself, it takes two to tango, one to pump and hold, the other to bleed and lock. Do you follow my drift ?
2007-01-10 13:11:59 · answer #7 · answered by Anonymous · 0⤊ 0⤋