Coolant leak

cattleroper

My 05 F250 6.0 Power Stroke has a small coolant leak coming from the passenger's side rear of the motor. The only time it leaks is after the truck has been sitting and the motor has cooled down. I have no leaks while the motor is up to regular running temp. No other issues or problems with the performance and it has never shown that it has been running too hot. I can't seem to find the source of the leak, any suggestions on where to start looking?

Mr_Shiftright

That's right about where the heater hoses enter the firewall. You'll probably have to pressurize the cooling system with a pump and then put 'er up on a lift. That should identify the source.