OK...cant leave out the trail tech or nobody learns anything...
if you drive a major stick,branch,fence post...ect ect through you radiator you still arent screwed to bad. you just need to know how to trail patch it.
first you need to get to the damage by removing what ever is in the way...could be fans, schroud,grill. winch ..ect ect
then if you look at the RAD the fluid flows through tubes from side tank to side tank.
the secret is to find just the damaged tube/tubes and cut the tube. then using a needle nose pliers clamp the tube flat. and fold it back about an 1/4" at a time. after about three flips it will start to roll. rolling the tube up a couple inches will make it very water tight.
Do both tubes in opposite directions from the damage. you may need to do a number of the tubes and often one or more rows deep into the RAD.
I once broke a crossmember on a huge boulder pushing the tail of the trans up. this pushed the top of the fan into the RAD cutting a huge half circle into it. I lost about 15 rows 2 tubes deep. yet some handy work with needle nose and a couple "shot shells" of Bars leak and I drove 300+ miles home from a wheeling weekend.
Thom