Originally Posted by
Mjollnir
It could be one of three things: (1) leak from a hose that failed; (2) leak from a gasket that failed; or (3) leak from a freeze plug that failed. If orange coolant is coming out towards the rear of the engine on a constant but slow basis, I would check the coolant hoses to the heater core first and then the gaskets. If it was the freeze plug, odds are you would have lost a great deal of coolant immediately, unless it is only slightly loose.
If you have never replaced the hoses in seven years, there is a good chance that may be the cause. Check the other hoses. If they are bulging at the clamps or too soft or too hard, they need to be replaced, as does the thermostat. Don't do one at a time, do them all at once, and use only Genuine LR hoses.
Check your serpentine belt while you are at it.