2009 Subaru Legacy 2.5 EJ253 SOHC engine
My power steering pump began to squeal a few months ago and progressively increased in volume. I purchased a new pump and installed it, squealing immediatly and noticed power steering fluid oozing from the power steering pump casing where the pump is put together in two pieces from the factory. This one was obvious that something was wrong with it. Exchanged it for another pump of a different remanufacture company. This second pump ran fine for about 3 mins then started squealing but only for a few minutes. After the car runs the squealing stops. I also replaced the power steering belt and torqued it properly according to the service manual.
I can tell that the squealing is coming from the belt as the pump stops or struggles to pump it freezes momentarily causing the belt to slip and squeal across the pulley. I'm unsure how to proceed next.
Could old power steering fluid cause the pump to seize up momentarily? Could the rack and pinion cause the pump to momentarily seize up under high pressure?