Cloudy Radiator Coolant (After Flushing)

Oh, no overflow before. Maybe backup. I think it is normal for a little coolant to flow into the overflow bottle and then get sucked back when the engine cools. That usually happens when people think the radiator should be filled to the brim. Original ones that didn't have an overflow were supposed to leave a little air gap at the top. Some people here keeping adding water to the rad to the brim, then wonder why their overflow level keeps rising. The system is just adjusting itself. That is why many owners manuals since the 1990's tell you to just fill coolant in the overflow and not even look in the radiator. In my 1980's M-B, the "overflow" is actually a pressurized "reservoir" and is supposed to have air at the top just like the radiator that it is effectively part of.