Brake caliper won't bleed

[zeta]

Today I have been tickling my brakes and giving them a cheeky bleed after some spongy madness. The o/s/r won't bleed at all. The brakes feel better but not quite up to standard performance. What can cause one not to bleed? Knackered caliper? Blocked hose? Hoes

Picture for fun

 

[bozothenutter]

I had this recently, all calipers bled fine except one.........

after a lot of unsuccesfull tries a pressurised bleeder in combination with pumping the pedal got the fluid flowing...

 

[Bobby.]

Have you tried taking the bleed nipple out and applying pressure on the brake pedal? If so and its not coming through try taking the pipe off at the calliper and see if it comes through, that will confirm if its a fucked calliper.

 

[zeta]

Cheers for tips chaps. Will try taking the nipple / hose of first as I only have a poverty spec bleeding kit and report back

Thanks