fixed my spungy brakes today

[JBE]

I replaced the rear brake pads on my GQ the other day and bled the brakes thoroughly and after that the brake felt really spungy with the pedal sinking. I was sure that I had no leaks and the master cylinder is almost new. This was bugging me for the best part of the week and I searched the forums a bit to see what other people have done. One guy suggested to counter-bleed the rear callipers through the proportioning valve. This is something, I had never heard of before. I thought why not and gave it a go and actually worked. I pushed the pistons back in and bled the line through the nipple on the proportioning valve. After that, I bled the prop valve and callipers the conventional way with about eight strokes each and everything was fine. I think the idea is to push any air out through the highest point. I’m just wondering if anyone else has tried this and solved their problems.
Cheers
Joachim

[coxy321]

Will do that in the next few weeks! Thanks for the advice mate.

PS. Might want to edit the thread title to "spongy" too.

[JBE]

I also read hat some old school people tap the calipers with a mallet to move trapped air out.

[mudrunna]

will try that , my gq dont stop to save it self... just rebuilt rear calipers,just scored twin piston jobbies for the front. putting new slotted rotors also.. let you kno how i GO..