it would apeer that ash and myself are in a similar boat though i think i have found the problem a wheeping seep around the brake push rod
i have posted a pic of the master cylinder if someone can conferm its origin i think its sierra but having not got a doner car as such i cannot garentee it
i just keep getting air out of the bleed screws after putting litre after litre of oil threw it and there are no leaks at any joints as far as i can tell so i think it must the the seel around the plunger....your thoughts???
chears tilly
