A week ago i noticed powersteering fluid on the driveway.opened the hood and saw some hoses covered in p/s fluid. on the way to parts store, my p/s started to make a sound like big foot was heard in the mountains . I bought more fluid and all the hoses I needed. Get home,replaced all hose on p/s. Turn on car and went for a drive. p/s noise went away but a new noise appears. At idle the car sounds fine. but when you get to 2000-4000 rpms i hear a light knocking noise. The knocking noise sounds like it's coming from the head but then it knocks all so at the bottom where the oil pan is.