leakage

It got down to 10°F last night and I started it this morning then boom, saw a drip coming from the left side of the radiator on the plastic ripples. I have straight antifreeze and it showed no signs that it froze. What do i do? A new radiator is $272 and a headache

Sometimes I don't like my car...... I made some pictures from my engine in order to build a home made front splitter and found this: Looks like an oil leak from the front seal? Or could this be the RTV at the bolt? Is this a common problem, can't remember forum threads about this on a 4.6. Car...