got a crazy sound now when I start my car, I am getting a banging / growl sound out of the valve block and the pump in front of the motor by the fan blades and the hydraulic hose coming from pump to valve block. it looks like it's pumping or trying to pump. I opened the bleeding screw on the valve block , but nothing came out, the green reservoir is full of oil. I tried to open a line at the accumulator assembly to bleed by gravity but nothing came out there either. so any ideas on why the mineral oil is not pumping through the system and why I got the crazy sounds. Thanks Mike