Brake bleed troubles...

[ArJay]

Hey doods...

I'm having extreme troubles bleeding the brakes on my S3 RX7.

Rears bleed absolutely fine. Fronts just will not...

Removed line from front brake port of MC and covered with finger. It pulls and pumps fluid no problem. As soon as I take my finger off or hook up the line it fails...

Anyone shed any light. Freaking over it.....

Rory :)

[miket]

Any fluid discharging from the caliper at all when the pedal is depressed and the bleed nipple cracked open ......blocked brake line if no fluid discharge.
Is the MC leaking where it bolts to the vac assist and check that there is no sign of brake fluid on the rod that connects to the brake pedal ...if it is then MC is usualy shot..

michael...

[yelloS2Rx7]

Maybe blocked bleed nipples, they can be a pain in the ass when bleeding...
take em out and blow thru em, clean out with thin wire
if u crack the brake line at nipple and pump it should squirt out
you should be able to see the new fluid being pumped thru....??
Try not to depress the pedal fully...half way is best
coz if there's corrosion in the master it will destroy the seals on the MC plunger
and ruin ya MC

[ArJay]

Any fluid discharging from the caliper at all when the pedal is depressed and the bleed nipple cracked open ......blocked brake line if no fluid discharge.
Is the MC leaking where it bolts to the vac assist and check that there is no sign of brake fluid on the rod that connects to the brake pedal ...if it is then MC is usualy shot..

michael...

Hey bro.

Know the line isn't blocked because can see it pressurising the clear bleed tube as I'm a pumpin'.

Will have to properly check the MC for fluid leaking. Had a good long look for leaking inside the cabin and there's none. Might take the whole MC out again and recheck.

R:)

[ArJay]

Try not to depress the pedal fully...half way is best
coz if there's corrosion in the master it will destroy the seals on the MC plunger
and ruin ya MC

Thinking this might be the case.

I've had the MC on the bench and it pumps fluid out of the rear brake port fine but not the front.
When the port is sealed (finger) it pumps ok but fails as soon as removed.

R:)