My 2000 Alero 3.4 engine, has a new radiator, water pump, expansion tank and I have removed the thermostat. With that in mind the car runs fine at an idle but when I drive it - it starts to over heat with in 10 miles. I have also checked and I have no leaks that I can see. the water is clear with no signs of oil and the oil is its proper color and not milky in any way. I have also check the hoses when it starts to over heat and the hoses are not collapsed. The one thing I did find is that the power steering pump is going but I don't think that would have anything to do with this. Any Ideas would be greatly appreciated!