First off what are you working on? But anyway 4 or 6 cyl. it's very easy. Drain the coolant by undoing the petcock on the bottom driver side of the radiator remove the coolant filler cap (this will make it drain much faster). While that's draining, unbolt or unclip the fan shroud, leave it in there, don't try to take it out if you have a 6 cyl. After the coolant has drained out, undo all three hoses and unplug any sensors. Then remove the raidator retainer, it should have only 2 10mm bolts holding it in place. Then just lift it up and out.