Caracal13

Okay. Thank you for your responses. It is not my vehicle, a friend called and asked if I would have a look. It seems odd to me that it only drips when the heater is in use. If coolant is continuously moving through the heater core then it is pressurized when the engine is running. Therefore, it should leak whether the heater is in use or not in use. That is why I asked if the Journey used a bypass mechanism when the heater was not in use. I will check the clamps at the firewall.

Yes, the dripping is/was on the engine compartment side of the firewall. The carpet did not get wet inside the vehicle. It was dripping at about the same rate as the a/c condenser during the summer. Why would it stop after the heater was no longer being used? The vehicle has not lost any coolant since the heater was last used in March 2025. Are the clamps that hold the heater hoses to heater core nozzles a common problem with Voyagers?

Hello, I have a 2017 Dodge Journey (2.4l) that loses water only when the heater is used. Last winter water had to be added every day or two to the coolant reservoir. Water was dripping from the firewall a little left of center (closer to the steering wheel). When spring came and the heater was no longer being used, the dripping from the firewall stopped and water no longer had to be added to the coolant reservoir. The inside of the vehicle did not get wet, it only dripped from the firewall. Sounds like a heater core, but why would the dripping stop after the heater was no longer being used? Is there a bypass valve that diverts the coolant when the heater is not being used? Thanks, Caracal