Club 80-90 Forums

Hi there, I have a loss of brake pedal pressure. It is fine after about 14 pumps of the pedal, then after couple seconds loss of pressure until it builds back up again then I can hear all pads and back brakes biting fully. No fluid loss no hissing behind dash. Just bled a 500ml of eezibleed through it all. Not bled clutch yet could it be affecting pressure and giving a spongey pedal? How much ml to bleed the clutch? Many thanks.

ps the o/s drain screw, managed to get a few drabs of brake fluid out today with some enthusiastic pedal pressing, i might chop these calipers in for recons, how do you prime them first with brake fluid? secondly, i have to mention that i have felt the pipes to the caliper and the hoses with my hand and i can feel fluid passing to and fro so no problems with collapsing hoses etc there. no loss of fluid. no hissing or strange noises. just a strange loss of pressure that builds back up again. please advise.

air in system not bled out, easiest with two people old school style really, clutch not part of system, only shares reservoir

shall i run another litre through it? i am going to cry. i can hear the pads coming on, on the front drivers side, but feck all fluid most of the time coming out of the drain nipple on the front o/s caliper. shall i go get some recon calipers, have had enough of these and the wonderful experiences of them lol.

xpress wrote:shall i run another litre through it? i am going to cry. i can hear the pads coming on, on the front drivers side, but feck all fluid most of the time coming out of the drain nipple on the front o/s caliper. shall i go get some recon calipers, have had enough of these and the wonderful experiences of them lol.

As aiden says, sounds like air in system. If you are getting no fluid out of calipers with pedal depressed and nipple open. Need to keep putting fluid in until it comes out.
Check this link https://club8090.co.uk/wiki/Te ... s/clutches

both bleed nipples on the fronts are seized, bleeding from the drain nipples the ones lower down, the front o/s all i have seen out of it is a dribble, maybe i should just sit there for half an hour pumping the pedal until i can see some consistent fluid coming out of it. would a stick on the brake pedal and filler cap off help expel the air out of the system?

BTW, you will only need new calipers if they are pi$$ING out fluid (seals knackered) or if the are very corroded or if they won't free, stuck on.
New calipers will need bleeding too, just takes time, better with two people one on pedal the other watching fluid coming out of nipple.

If nipples are seized solid then maybe new calipers.

xpress wrote:both bleed nipples on the fronts are seized, bleeding from the drain nipples the ones lower down, the front o/s all i have seen out of it is a dribble, maybe i should just sit there for half an hour pumping the pedal until i can see some consistent fluid coming out of it. would a stick on the brake pedal and filler cap off help expel the air out of the system?

Take the calipers off and rotate them until the nipples are at the top - air rises so using the drains won't get the air out, just waste fluid.

A stick on the pedal won't do anything here.

if the fluid has gone below the minimum mark, will the clutch slave need bleeding too? it's not changing properly. where's the clutch slave? cheers.

footprint, the bleed screws are seized, i heated up the bleed screw with some heat until red hot, still won't come out with mole grips. shall i chop the calipers in for gsf new ones? i saw a garage bleed the front n/s during a hose change with the drain screw and it was fine after that. maybe they had a vaccuum suck bleeder.

i will keep messing with it, pump pump, it's better today than it was yesterday.

unless you can get the top nipples out of the calipers you won't bleed the system, plus gas or better still rost off, patience, tea, rost off, heat, more rost off more tea, then some heat maybe and use 7mm socket if possible on 1/4" ratchet to try and avoid shearing them, then if they come out get some new ones and then start bleeding again from the rear nearside, offside, front nearside, offside if rhd
as long as you don't operate the clutch there will be no air in it so no need to bleed - the bleed screw for clutch is on the slave cylinder for future reference

did a bit more bleeding, now the pedal only needs one pump to get firm. left a heavy object on the brake pedal and the cap off the filler cap. will check it tomorrow.

Removed both crusty brake nipples from front calipers. Any reason why the replacements are stainless? I used heat and a tefLon spray. Anyone with brass ones?

Bled all the bubbles and new fluid coming out. Took another 400ml. Bleeds were truly shocking. fitting rubber caps on them that weren't there. Will do front pipes soon.

Van has v good pedal again. I feel a little air pumping when first pressing it is that the servo filling up is that normal?

I recommend one way valve bleeder over eezibleed, you do one wheel at a time, get someone to pump and refill the filler after each wheel. Seems better.

Can you tell me does anyone use any red grease on their calipers under the dust boots to keep them moving nicely and to guard against corrosion? Does it stay on for any length of time or does it dry out? Cheers.

xpress wrote:Removed both crusty brake nipples from front calipers. Any reason why the replacements are stainless?

are you for real you answered your own question mate

.

I feel a little air pumping when first pressing it is that the servo filling up is that normal?

.. the servo is a vacuum assister, vacuum = empty it uses air pressure to help you brake
try googling "Automotive braking systems" you might want learn a bit more about them

I'll ask again ..are you following the procedure for bleeding the system?
if you do them out of order then some air will be left in

Oi rev, easy tiger!! I am trying to get my van right so you can bless It!!

I thought brass would be better for bleed screws?

Back in the day,
This garage bled just the fronts after a hose change and the pedal was golden! Just passing the info on ..

Ps Thanks for the info.