Power Steering Pump Bearing by Crown®. Crown Automotive is just the ticket if you want to get the most out of your vehicle as well as revel in a more exciting driving experience. You will surely get a real bang for the buck!
Suspected Volvo Power Steering Pump Bearing Failure, incredibly loud only occurs when at idle or off the accelerator. Video shows my trial and tribulations in diagnosis. Pump lines vibrate with same tone. I did not have time to take off belt to see if tone stays.
Found PCV nipple on the passenger side of the intake manifold right behind the power steering pump to be soft. This part came from an after market kit inferior from stock and the rubber become soft from the gasoline vapor thus degrading it's structural integrity. Under large vacuum it would collapse on it self and develop a loud humm. I replaced with fuel line hose.