First started with a leak, replaced the pump with a used one but didnt work, wasnt pushing fluid through, got another pump, the power steering works fine but when I turn the wheel it make a terrible noise. Got another pump thinking it was the pump, flushed the system, filled with LUCAS power steering fluid and same thing happens, mad noise when turning only but pump is working. Im stumped, could a bad serp belt cause extra pressure on the PS pump, the noise is definately coming from the pump, please help!

 

did you bleed the system after installing the pumps?