jonahboo Posted May 7, 2013 Share Posted May 7, 2013 hey guys - so i brought the car outta winter hibernation - went for a nice ride 2 days ago (no issues). Went to drive it today and the brake pedal goes all the way to the floor - pumps up and holds - then when re-applied drops all the way again.Master had good fluid levelno visible fluid leaks by wheelsall stock brakesmy first thought is master cylinder - thoughtseasy rebuild? - or buy from Kanter $$$$?thank youJess Link to comment Share on other sites More sharing options...
TexasJohn55 Posted May 7, 2013 Share Posted May 7, 2013 (edited) Jess, Easy rebuild. If you have a booster it is a little more complicated, would need a manual for that. I rebuilt mine, no problems. At the worst, you may need a brake hone to smooth it up if pitted in the bore. TexasJohn55 Edited May 7, 2013 by TexasJohn55 (see edit history) Link to comment Share on other sites More sharing options...
jonahboo Posted May 7, 2013 Author Share Posted May 7, 2013 thanks JohnManual brakescan local auto store hone??is there an ez sorce for rebuild kit?thank you Link to comment Share on other sites More sharing options...
TexasJohn55 Posted May 7, 2013 Share Posted May 7, 2013 Say, while you are there, it would be a good time to replace those rubber hoses, one each side in front, one in the rear. They are now available at auto parts stores for around $15.00 or less. Shop around, stores now have the older models in their databases. That way your can kill 2 birds at the same time, gotta bleed 'em anyway. John Link to comment Share on other sites More sharing options...
TexasJohn55 Posted May 7, 2013 Share Posted May 7, 2013 Buy a hone, will need a drill motor,WD40 and couple cans of BrakeClean. Auto parts stores will also have wheel cylinders, it's probably time for those as well if they are same age or that will be your next problem. They may already be bad and you won't know unless you pull the drums and peel back the rubber cups to look. Just do it right, parts are available and at a reasonable price now. Don't bother rebuilding wheel cylinders, buy them new. In Texas, we have Autozone, O'Reilly, NAPA and others. I have not tried to buy shoes so I don't know about availability of those. John Link to comment Share on other sites More sharing options...
buick5563 Posted May 7, 2013 Share Posted May 7, 2013 TxJohn has good points.O'Reillys has MC rebuild kits. I would go to NAPA for the wheel cylinders, though. O'Reillys has them listed, but they weren't right. Link to comment Share on other sites More sharing options...
jonahboo Posted May 7, 2013 Author Share Posted May 7, 2013 food for thoughtI had the car parked nose down on an inclined driveway for a day - you you think this caused the master to possibly fail - ie - fluid leaking past the diaphram??? Link to comment Share on other sites More sharing options...
buick5563 Posted May 7, 2013 Share Posted May 7, 2013 You would see it at the front rubber dust cover. That is where mine failed. Link to comment Share on other sites More sharing options...
jonahboo Posted May 7, 2013 Author Share Posted May 7, 2013 You would see it at the front rubber dust cover. That is where mine failed.was there fluid visible / leaking on ground? Link to comment Share on other sites More sharing options...
TexasJohn55 Posted May 7, 2013 Share Posted May 7, 2013 Jess, You said it was full of fluid and would pump up. There is a cup seal on the plunger in the master cylinder, rapid movement will make it "flare' out and seal against the cylinder wall. When pressure is released it relaxes again and won't seal under normal pedal application. The other mode of failure is usually to bleed off slowly while holding at stoplight. Good luck, John Link to comment Share on other sites More sharing options...
jonahboo Posted May 7, 2013 Author Share Posted May 7, 2013 Jess, You said it was full of fluid and would pump up. There is a cup seal on the plunger in the master cylinder, rapid movement will make it "flare' out and seal against the cylinder wall. When pressure is released it relaxes again and won't seal under normal pedal application. The other mode of failure is usually to bleed off slowly while holding at stoplight. Good luck, Johnthat said are we still thinking "rebuild the master"?orhow to correct this?thank you Link to comment Share on other sites More sharing options...
TexasJohn55 Posted May 7, 2013 Share Posted May 7, 2013 that said are we still thinking "rebuild the master"?orhow to correct this?thank you Uhhh.......Yes! Link to comment Share on other sites More sharing options...
old-tank Posted May 7, 2013 Share Posted May 7, 2013 If the master cylinder has pits or corrosion that will not clean up easily with honing, consider having it resleeved. Even then I would not rebuild more than once. During manufacturing a hard surface was rolled into the bore and use along with repeated honing removes this. Back when these cars were contemporary, I rebuilt yearly...until it was 'splained to me. Since new wheel cylinders are readily available, don't even consider rebuilding these.Willie Link to comment Share on other sites More sharing options...
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