Help! Coolant leak on 04 5.7L Hemi 4x4
It was bitter cold this weekend...temps well below 0 F most of the weekend. Needless to say, I let my truck idle in the driveway before going out to do some Christmas shopping. Sunday afternoon, when I got back from my last trip, I noticed two large spots on the pavement...one from each time I let my truck warm up. I checked out the spots and it turned out to be antifreeze. I popped the hood and checked the reservoir. It was on the low side, but not empty. I shut the truck off, crawled under, and looked for a coolant trail or indication of a leak. All I could find was a tiny drop on the bottom of the front crossmember, but I could not figure out where it was coming from. All of the hoses looked dry, the water pump looked dry, the bottom of the engine, the timing chain cover, everything looked dry. I let the engine cool down (which didn't take long), and opened the radiator. It was full to the rim. So, I started the engine again and let the truck idle for about a half hour. This time, there wasn't so much as a drop on the driveway. I haven't seen any other puddles until this morning...which is about 30 degrees warmer than all weekend. I warmed the truck up before I left for work...for about 15 minutes. I don't know if any of the puddles formed when I warmed the truck up, or when I got home and shut it off. Any ideas? The truck has just over 20K miles on it.