with fault on(ie with wheel locked) if you loosen bleed nipple when you slacken nipple on o/s does it release brake? 1- if it does then it could be hose faulty or master cyl building up pressure ,it could do so if cylinder piston dosn't return fully [check cross linkage under bonnet to make sure it is not siezed anywhere ]2-if it dosent then fault will possibly be on calliper, make sure piston is free, also check where calliper slides on pad pin that it is free [there is an insert in calliper where pad pin slides]remove it,clean behind it ,then refit it.
k
December 2007
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