Started my truck and went to go to work. Temp was 39. Truck heated up And blew warm got down the road and heater temp went cold. Then was intermittent and then cold. Temp gauge never spiked. Got to work turned it off and smelt coolant. Checked it later in the day and no coolant. Filled it with water to limp it home. Seen water dripping from bottom of harmonic balancer but can’t see where leak is coming from. Just replaced thermostat and temp sensor. Any ideas? I’m no mechanic but can figure it out enough to fix with a good ole YouTube video.