Well I am in a pickle. Early wednesday morning at work I spotted an unfortunate puddle of coolant under my truck. Started it up and saw drips but couldn't see where from. When I left work I topped off the overflow with what 50/50 mix I had and drove home. During the drive I layed into the throttle a few times and saw what looked like steam in the exhaust, but not too sure since it was at night and can't really see what color it was, plus I had only driven a few miles and it might've still been cool. Well I got home after 32 miles and there was no more leak, but I crawled under it and saw the tell-tale sign of coolant leaking from between the head and the block on the passenger side in the rear. There is nothing out of the ordinary on the oil dipstick. And since topping it back off and adding some Bars Leak, it hasn't leaked since. So what did I do? How can I check externally without tearing into it since it's my only daily driver? Did somebody mention something about an upper radiator hose check while it's running? Well it wasn't impossible to squeeze while it was running, and there were no bubbles coming up into the overflow tank. PLEASE help!