ceedee

i started off with changing my wheel bearings
i broke a bolt of a caliper, so i said f-it and bought a new set of front calipers.
then i finally got em off the hub.
and i saw that the racer of the inner bearing worked it's way into the hub and was loose like a prostitute in downtown orlando.
so, i got myself 2 new hubs with 2 new brakedisks (slotted ones).
i took the bake dust cover off and painted it in this 1200f black bbq paint.
i put it all together. wanted to fire her up and i see already a x-mas tree with red lights
master alarm and some crapp about brakes. and worse yet, when i started her, there was NO brake pressure at all ((!!!)). i checked for leaks
nothing prominent. i then bleeded the brakes, no difference.
so what the heck is that now?
i mean , it is getting annoying , not to metion the most expensive ball bearing job ever.
BTW i used to hear a hissing noise when i used the brakes before. and when i bleed the brakes , i noticed there was no fluid coming out of the front passenger caliper when i bleed it. all others had some...and then i noticed , too that the fluid in the reservoir goes down by pressing the pedal and raises then back up, maybe got nothing to do with anything , but who knows

69gaugeman

If the fluid is raising and falling I suspect the master cylinder is toast.

jon928se

B 4 you go buy the new M/C you have to work out why there is apparently no fluid getting to the front pass caliper. Until you get clear no bubbles fluid out of there buying parts is dumb. As you appear to have some hydraulic problem just buy el cheapo brake fluid own brand DoT 3 is good enough (by a gallon can it's cheaper that way) , til you sort the problem. When you know the system is completly good and solid replace it with premium fluid of choice.

re the no fluid in the caliper
make sure you are using a pressure bleeder (the kind you pump up by hand or attach to a tyre to pressurise the reservoir - saves wearing out the patience of the wife's girlfriend's, boyfriend's? SO's lover's right foot) - If that doesn't produce fluid at the caliper you need to leave it all rigged and pressurised and jump in the car and press the brake pedal HARD with the bleed valves on the dodgy caliper open. That will either solve the problem by blowing the crap out of system or if nothing comes out you need to suspect that the rubber hose to the caliper has an internal split that effectively blocks the hose.

You don't say but I seem to recall you have an 83? if still on the original hoses it is way way past time to change them.

More infor req'd to go much further.

Happy new year

Mrmerlin

Hi it sounds like the master cylinder seals are gone if you see the fluid rising and falling with movement of the brake pedal this indicated that the seal is not sealing, if your master is over 5 years old consider replacing it, if the fluid in the master has not been changed in over 5 years consider replacing the master, if you see fluid leaking from the master to brake booster replace the master. Somtimes the brake bleeder nipples will get clogged and prevent fluid from draining out remove the brake caliper nipple and see if fluid drains, out also before you bleed the calipers bleed the master first

ceedee

hey jon of oz

yes you're right its an 83 928s.
when it all happened i don't recall having messed with the lines at all
all i actually did is, i tried to unbolt the left caliper. then, to get the freaking thing of, i pried the left caliper in with a screw driver and that's when i first noticed no pressure.
it was after that , when i changed out the calipers.
oh, i replaced the rubber hoses as well.
i try to get the power bleeder, cheapo .

ceedee

what does the bleeder valve at the brake booster looks like
is it that black and blue little thing?

Fabio421

CeeDee, I just bought a new power bleeder. It came in the mail the day I left on my trip so I haven't gotten to use it yet. If you still don't have your brakes bled by the time I get back in a few days, I will come help you do it.

ZEUS+

How was the brake pedal before anything was replaced ? If calipers are new, bleeders should be also. Do you have a mity-vac ? If there is a lot of air in lines, fluid level will rise and drop as pedal is pumped. How are you bleeding the brakes ?

Mrmerlin

the master cylinder may or maynot have a bleeder on the enf it if not try cracking the lines one at a time that go inot the master and have someone slowly push the pedal down while the linne is open then close it repaet this till no air comes out then move on to the brake calipers

ceedee

i had the rear brakes relpaced with calipers and all.
the mechanic told me today that they had to power bleed the brake system to get any pressure.
when i got the car back then there were a few lights blinking (the master alarm and brake pr. just the same way it is now)

scott was saying that i might have to use a mity-vac.
also, i noticed that there is some odd rigging on the master cylinder.
where the bleeder valve usually sits (on the top , at the far left side) i got a line going down to what looks like the left caliper.
i remember pusing back the calipers to get clearance when i removed the pads.
maybe i blew a seal when i did that. as i might have pushed fluid the wrong way into the bleeder valve.

yeah that would be great if you would do that. but depending on what is going on with the mastercylinder, it might not work.

like i said there doesn't seem to be a bleeder just a line down to the left caliper.
but i will try that tomorrow, too.
at this point i really don't know anymore and any input is super greatly appreciated

ceedee

well, the way everyone diagnosed this 'lil situation' is that it is the mastercylinder.
my thanks go to stan and scott ,who tutored me trough the whole thing
(scott did that even while he was dodging deer...wow).
scott from PA and stan from motorsport will be my main suppliers for my parts from now on, they are very competend and got the best pricing on the planet when it comes to parts.

happy and save new year everyone.

ceedee

i still can't believe that the master cylinder apparently just stopped working within a day...
all i did was pushed the left calipers back with a screwdriver. can that have messed up the seals?

and i think about what the mechanic said ...they had to power bleed the brakes for an hour to get pressure.
any idea why?

AO

DId you remove the cap from the resevoir before you did this?

Fabio421

There is a process that most would call "burping" the master cylinder. Do a search and read up on it. Its worth a try. I still say your problem is air in the system. Why else would you not get any fluid from one bleeder but get it from the rest?

ceedee

fabio,
i now get fluid out of all of em ... had to clean the bleeder/ but i get loooooooads of air and still no pressure. i used the mityvac thingy on the left caliper and it just had air mixed with fluid comin all the time. i changed the fluid at least 10 times because the mityvac cup was full. yet no pressure.
it's so frustrating.

andrew,
i can't remember but i don't actually think i did. that was bad, right?