If I add the coolant pellets to my upper radiator hose on my 4.9 do I have to crush them up or can I just drop them in and top off any coolant I might lose?
Like Kev said they will fall apart very quickly when wet. On the 4.9 you can just stuff them down the radiator neck. If they don't fit, then crush or break them up a bit. The only reason for crushing them is because they may make contact with the trans cooler line in the radiator side tank and prevent you from pushing any more in there.
Yup, you got it. Like I said, if you can't get them all in, either break 'em up or cap it up and run it with what you can get in there. Add what is left tomorrow.
If you put them in to the radiator neck you (I did this) can disolve them in a cup of water first and then pour the spooge right down in there. Just be sure to get them directly into the cooling system, either radiator or hose, NOT in the overflow tank.