Hey guys, new problem....I think. We've had sub-freezing temps here since I got the jeep running. I haven't used it because I had a few more things to do, i.e. flush radiator, etc. I had water in the block because I didn't want to flush good anti-freeze and I need to know if this is a problem. Can I start it, let it run, and melt the ice? What kind of trouble could I be looking at? The lines are all frozen on top. Thanks.