Radiator help....

'97 GA SE V6 3.1

I've got a major coolant leak, and need some advice. Here are the symptoms:

I've seen orange Kool-aid leaking out in a stream several times. It only leaks when the car is warm (when the thermostat is open?). I've been refilling the reservoir several time in the last month, adding a quart or two of coolant at a time. The car doesn't overheat (as long as the coolant level doesn't get too low), and I just changed the oil and so no signs of coolant, so I believe the leak is just external. I've tried to locate the source of the leak, but have been unable- when it leaks out, it leaks onto the frame, and drips down from the frame in multiple places. I think the leak is in front of the engine, because this is the area of the frame that is dripping undernieth with coolant. I suspected (hoped!) it might just be a burst hose, but I removed them and inspected them, and can find no sign on them.

Then I inspected the radiator, and found this crack:

http://img45.imageshack.us/img45/6523/11919904ev.jpg

See it there in the plastic, just above the fuse box? You can also see it is wet with a leak. I'm not absolutely convinced this is the primary leak (I expected it would be bigger), but I decided to remove and inspect the radiator, hoping I might find a more obvious leak. I got it out successfully, and can't really find another source of a leak.

So now, my questions:
Does a crack like this seem like a likely candidite for a large leak (like maybe when the collant is pressureized from the thermostat opening, and the plastic expands/flexes from the heat)? Having the radiator out now, does it make sense to have a radiator shop fix it, or to replace the whole unit? How do I find a radiator repair shop (a yahoo search returns only a list of area car dealers)? If the leak isn't in the radiator, after I get the car reassembled :uhoh: how do I find the real leak?

WOW...thats exactly where mine is cracked,,but mine cracked(i think)from
when my head gasket went bad because of the pressure in the cooling
system,,mine doesn't leak.........yet

looks like it's time for a rad. for ya...:banghead:

Lol, my radiator also cracked in the exact same spot. I bought a new aftermarket radiator for about $90 from radiatorexpress.com. I think a new piece is a better option than paying almost that much to have the old one cleaned out and repaired.