Hi Whenever i turn the wheel of my 406 Hdi to full lock, or when there is sufficient resistance ( like curbstones) the power steering pump starts making quite a loud and protesting noise. ( like maggie is back...) i gather this must be a pressure reduction valve somewhere in the line between the steering rack and the pump, however i can locate it. The bearing of the pump seems to be just fine ( no play), and the fault is intermittent. One other thing, there is a whirring noise coming from the alternator i believe the bearings are shot, but i not quite sure about it. Any other common things in that respect to look for? Thank you Marc