Fixing Roxy.

So...........today we followed the instructions on the 'Seal Up' bottle that Udi had recommended we try. The instructions were as clear as mud ......how do you exactly ensure the radiator core is covered with water and what is the normal operating temperature?.......We drained Roxy's radiator and flushed it out twice before adding the 'Seal Up' to the cooling system and let the engine idle for 30 minutes before draining the radiator once more.......we now have to leave her for 12 hours and then flush the system once more before finally refilling her with water..........and hopefully her problem (and ours) will be solved.