Hey guys, I was just wondering what are the signs of a busted heater core, because I think I have one in my '91. While I was going to pick up the girlfriend last night, I noticed the temp gauge start to slowly rise, it would level off, then start to rise again. As I'm leaving her house, I notice the gauge starts to rise some more, almost going to the top, then smoke/condensation starts coming out of the vents. I stop immediately and check under the car to find a huge puddle of coolant on the ground. It looked like it was coming from the passenger side, behind the front tire. I popped the hood and couldn't see any coolant leaking from the engine. I haven't seen any coolant inside the car from under the dash on the passenger side, but I've also heard that condensation from the vents is the result of a busted heater core. Any info would help, thanks.