I have never flushed radiator coolant before.  Do you know of a video
or illustrated web page that shows how to flush radiator coolant on 97
Nissan Sentra?  I read the owner's manual and it talks about loosening
air-pocket screws and more.  The hand sketches are pretty bad on the
owner's manual.  I could not even locate the drain plug underneath the
radiator let alone the air pocket screws.  Where are they located?
Anyone has a video or digital photo?