Underbody Heater Lines
WARNING: This page is about a different car, the 2004 Mercury Monterey and 2004 Ford Freestar. However, it is still accessible from the selected car via links, so may be relevant.
The underbody auxiliary heater lines have the following features:
- The underbody auxiliary heater inlet line (18696) is a aluminum tube assembly that carries coolant from the engine coolant supply line to the auxiliary heater core inlet.
- The underbody auxiliary heater outlet line (18663) carries coolant from the auxiliary heater core to the front heater core outlet line.