I have had the dreaded leak on my PS system for about 7 years but its just over the O/S hub so Im pretty sure its the box/hose not the Pump as its on the N/S?. However there seems to be a droning noise from the eng but yet it doesnt sound like it is the engine itself. I have put endless tubs of Lucas PS leak stop in over the years and dont think its ever been dry. (prob a good time to apply for the money back guarantee) Has anyone experienced increase noise with their worn Pumps?