[mattravj]

I have a small leak coming from somewhere, but haven't been able to track it down yet. It only leaks when the truck is totally cooled down. Never when it is hot or running. In fact, it usually only leaks if I go for more than a day without driving it. Then, it is just enough to form a small 5' or so spot in the driveway. Any ideas? It has not even been enough to really effect my coolant level, but I would like to fix it before it gets worse if possible...

 

[THEDIESELMAN]

What I would do is pressurize the system when it is cold and see if you can find the leak that way.