Watch your coolent levels.
I noticed no coolent in my resivoir and added antifreeze, low and behold very small leak in the hose wherr it meets the bottle. Not sure if there the same for the eco and yote.
Both Eco's and 5.0's have similar issues. The coolant tank itself cracks on some over time and others just have the hose leak issue there where it hooks up to the tank. I've had two friends with Eco's have this exact problem. Both were 80k+ mile trucks, but that hose is a VERY long setup and hooks up to things all over on both sides of the engine bay. I believe it was $125 or so from the dealer with all the connections and heat tape, etc on it.
Both Eco's and 5.0's have similar issues. The coolant tank itself cracks on some over time and others just have the hose leak issue there where it hooks up to the tank. I've had two friends with Eco's have this exact problem. Both were 80k+ mile trucks, but that hose is a VERY long setup and hooks up to things all over on both sides of the engine bay. I believe it was $125 or so from the dealer with all the connections and heat tape, etc on it.

