Hello! I am flushing my coolant today, and it seems like its going to take a long time. Wondering how slow of a drain I should expect. I started about an hour ago and the thing mostly drips (consitently, but drips nonetheless) I think is going to take about 2 hours per drain, which seems too long. I might just work on cleaning the MAP and whatever else might take some of the boredom away.
Is this a bad sign of a clogged radiator or something like that?
Please share your experiences

I opened the radiator petcock, turn heater to max, and removed the expansion tank cap. Planning on adding distilled water and run for a minute, drain and repeat 3-4 times before filling up with proper coolant.
This is in an 2005 CRD Limited, Red.