Toyota Repair: Radiator, coolant loss, radiator core

Question
Hi,

I have a 1986 Toyota X-cab Pickup, which still runs pretty well. A few days ago, one of the hoses started to leak antifreeze, and I replaced that hose last night. When I drove the truck this morning, the leak was gone, but there was a lot of steam coming from the back side of the radiator (which had been fine up until this hose started leaking). I thought at first that it was burning off some antifreeze that I had spilled when refilling, but it doesn't seem to be going away. I can't see any other leaks, and there are no puddles under the truck. I'm wondering if it's possible that there is a more serious systemic problem here, and if I replace the radiator, something else will fail? Or, is there any reason why replacing a hose like this could cause some steaming to occur at first? It's also starting to get into the 20s and 30s where I live, and I'm wondering how much effect that could have. I drove the truck a little ways, and it seemed to get a little better, but I don't want to run the engine if there's a chance I could fry it. Any thoughts you might have would be great.

Thanks,
Jamie

Answer
I need to know exactly which hose was replaced.
It's possible there is another leak or a pinhole in the radiator core, the best way to check is to have the cooling system pressure tested, there may be nothing wrong except that there is coolant that has spilled into the fins of the radiator and just needs some time to burn off, just keep an eye on the temperature gauge and the coolant reservoir, if the engine temperature stays normal and there is no coolant loss I don't see a problem here.