Heater core line bypass

[Todd Hawk]

My heater core line was bypass directly into the manifold coming out of the firewall in the dash when I got the 07 expedition I fixed and replace the connection that was broken and took the bypass out and now I seem to have a coolant leak that I can’t findOn the passenger side it seems like there’s a little puddle of coolant in the bottom of the radiator fan the little lip and it wasn’t leaking before while it was bypassed anybody have any idea what could be going on thank you

 

[BlackBetty]

When you say, “…there’s a little puddle of coolant in the bottom of the radiator fan the little lip…”, are you talking about the heater core under the dash inside the vehicle? If so, the heater core will need to be replaced. Apparently, someone thought that would be easier than removing dash components to fix it properly.