is this replaceable? and how would i do this, hopefully not taking the whole radiator out.

thanks in advance.

 

What's broken? Pictures would help.

 

Usually not.

You could take it to a radiator repair shop and see if they can work magic.

 

Hopefully the below part is what broke. If its part of the Radiator end/cover, then new radiator.
Dorman sells one for the 5.4l. Maybe it's the same. Try to pick the broken piece out. Ford has them too.
Here's Oreilly's:
https://www.oreillyauto.com/shop/b/c...+Drain+Pet****

MK

 

pics of what is broken?

I broke off my coolant overflow nipple, I drilled and tapped a brass fitting and JB welded in there

 

the 19mm plastic head you turn to open the spigot to drain is completely broke off. so can it be tapped to add another 19mm head?

 

Click on the link in post #4.